Detection Projects GPIB Controller Resources
MISSION:
Detection Resources:
I'm falling behind on this blogspot.com site. I do want to post some
info so I do not forget. I plan on working on this site starting next weekend.
As noted on my first successful (I thought I had posted before a test
video though didn't seem to take) Youtube.com video post, I purchased two
TDS-520 oscilloscopes (a 520 and 520B) in order to be able to detect wider
bandwidth at a time, perform a few more critical receiving and transmission
bench tests for my DIY Home made hardware and even software tests for the
software controlled hardware projects. The 520B is working without any observed
issues and passes all self-tests. The 520 CRT isn't working and I still need to
troubleshoot the startup issues. Unfortunately the 520 doesn't have a VGA,
Serial or Centronics output... only the GPIB output.
I purchased and now have a NI PCI-GPIB Interface Adapter 183617J-01
card and I recently created a NI account and downloaded the NI 488.2 and NI
VISA drivers for the card. I'm working on a desktop to install the NI card into
for use with the TDS-520's.
I almost purchased the Agilent 82357A/B USB/GPIB Interface High-Speed
USB 2.0 and have already download the Keysight Instrument IO Libraries Suite to
see if they would work with the other reviewed GPIB interfaces (note, I still
would like a USB option for battery powered mobile laptop work and I was
interested in reviewing the code for insights if I get into more intense
programming projects for the below more cost effective Makes and Models):
1. UG01 USB to GPIB Controller - Made in USA:
http://www.lqelectronics.com/Products/USBUG/UG01/UG01.html
Note that a reply from the seller on eBay noted that the "UG
series does not work with other open source software or KeysightIO library. You
have to write your own software by call the API of UG01 software library."
2. Galvant Industries GPIBUSB rev4: http://www.galvant.ca/
Note that a reply from the seller noted that: "First off, my
adapter is NOT compatible with VISA or the KeysightIOLibrary. It is NOT a
drop-in replacement for those expensive GPIB adapters that you can buy from
Keysight/NI.
However, what you can do is still send and receive any command that the
instrument supports. VISA and that keysight library is just how your computer
connects to and controls the adapter. I decided to not require VISA or anything
like that, and instead my adapter just connects to your software via a virtual
serial port. This means that any software that can connect to a serial port can
control my adapter; no special bloated drivers required!
However because of this, you'll need to put in some more work since you
can't just use any "off the shelf" software GUI that Keysight made to
control the instrument. I have support for my adapter in InstrumentKit
(www.github.com/Galvant/InstrumentKit), but I don't have a driver for every
instrument ever."
8 days ago I received an email noting they are back in stock. Steven
Casagrande @
scasagrande@galvant.ca
"Hello!
After much delay, my open source GPIB to USB adapter is now back in
stock!
I am now taking orders via email on a first come first serve basis.
Here is a list of answers to common questions:
- Unit cost is $70 USD
- Shipping is via Canada Post
- Payment is via Paypal
- Untracked international shipping is $12 USD
- Tracked shipping costs vary depending on destination, but is
generally fairly expensive for overseas destinations.
If you would like to place an order, or require a quote/estimate for
your place of work, please respond directly to this email.
Please note that this email was copy pasted so I apologize for the
impersonal nature of it.
If you have any further questions or comments, feel free to respond to this
email and I will answer as soon as possible.
Thank you for being patient with me though this."
4. Arduino UNO as a USB to GPIB adapter / controller:
http://egirland.blogspot.com/2014/02/arduino-uno-as-usb-to-gpib-adapter.html
There was a broken link regarding the code and the gentleman who runs
the project and blog was really prompt in fixing and supporting. I haven't
gotten around to working on this DIY project... though find potential utility
for detection devices.
I just now found some other Arduino sites that I will reference, though
haven't read into yet:
Mainly, I need the GPIB controller to backup copy and edit the firmware
of the TDS-520's.
Secondly, I'm thinking the GPIB controller will be great for recording
data also.
The cost effective options will most likely be more for mobile
operations I'm thinking and the second use I noted above.
The first credible DEW detection Youtube video I've observed:
ReplyDeletehttps://www.youtube.com/watch?v=jlWTwIHC1Lc
Here are some reference works on Human Body radiation emissions:
DeleteOpenwater (https://www.opnwatr.io/)
Bioelectromagnetism (http://www.bem.fi/book/)
Human electromagnetic emission in the ELF band ( http://www.measurement.sk/2005/S2/Lipkova.pdf )
Imaging of Ultraweak Spontaneous Photon Emission from Human Body Displaying Diurnal Rhythm (http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0006256)
Radiometric system for determination of biologically active modulation frequencies of mm-range radiation ( http://ieeexplore.ieee.org/document/1173708/ ) Note that I have not read nor have access to this publication as of yet.
http://www.faim.org/measurement-of-the-human-biofield-and-other-energetic-instruments. Where Figure 20-2 shows the power spectrum of human emission (Bembenek, 1998). ...... Bembenek P: Akupunktur und bio-resonanz (in German), CO'MED Nr. 6:50. I need to find this article referenced still.
Transferred from Youtube comments:
ReplyDeleteI also created an account and downloaded RavenLite 2.0 to see how that bioaccoustic recording system works. Found another link to Audacity also and an interesting Audacity post (not the best as with all I've found): https://redecomposition.wordpress.com/2013/03/21/subtleties-of-acoustic-harassment-and-audacity/
I'm still working on the RDF/detection new laptop SSD drive since the magnetic drive died. In the mean time I was trying to use the SD card Ubuntu 17.04 and learn more about SDR with Linux. Seems more complicated and I am not able to get the pulseaudio isuse resolved with the Skywave 2.3 Linux Trial Use or Install yet. I did find Kali Linux 17.01 works and has a bunch of tools that may be applicable. Since researching Linux I've been exposed to the Arduino and Raspberry Pi's again and found this interesting device (https://www.hackster.io/anthony-mills/raspberry-pi-car-computer-5735f1?ref=platform&ref_id=425_trending___&offset=7) as well as www.hackster.io as a site to post projects versus GitHub. Either way... once we or I get projects going... we should post the devices and procedures in more detail. For now, I will proceed with what I have been using with more details documented on the dewdetectionprojectsblogsite.com. Trying to work on the road is challenging!!! :-|) Glad the Cuban Embassy incident is going on for public exposure... though not glad in regards to the maiming and intent to serial kill.
Keep in mind the raspberry-pi-car-computer would be modified like the Integrated Wall Calendar Project for RDF/Detection of DEW Assault signals coupled with human bio-metrics to real or almost real time collect evidence of the assault source and effect.
I don't want to go off on to many tangents, though I want to document this info here also for ways to spectrum analyze wider bandwidths and higher/lower ranges besides say an "RF Explorer" (http://rfexplorer.com/purchase/). Plus you'll have tools to perform other electronics stuff. Since the eBay Arduino clones are only like ~$5 and there are USB Oscilloscopes with FFT on the market for cheap that are more portable where you can custom program apps say for an audit trail (User, System, NIST Cal. info, Date, Time, GPS coordinates, Environ. Signals, Environ. Magnitude, Environ. Direction, Body Signals, etc.) ... then the challenge for a wider bandwidth cost effective off the shelf Spectrum Analyzer becomes easier. I found this project (https://github.com/valkuc/xoscillo) where if you hunt around like on eBay you can find cost effective systems with wider bandwidth (keep in mind the RTL-SDR bandwidth is better than the Parallax ( http://www.ebay.com/itm/Parallax-2-Channel-USB-DIGITAL-OSCILLOSCOPE-w-Probes-28014-WORKS-PC-Windows-/352158191197? )) so search for wider bandwidth USB Oscilloscopes and use the FFT and peak picking algorithms like the Center of Gravity algorithm to find trends: hash=item51fe438e5d:g:AwMAAOSw1XNZo4G0 http://www.ebay.com/itm/Hantek-Virtual-USB2-0-Digital-Storage-Oscilloscope-4CH-200MHz-1GSa-s-8bits-64K-/112104549525?hash=item1a19f3ac95:g:GZYAAOSwHoFXtNES The use of Wifi, Sirius, XM, DIrect TV, etc. radios may also be effective for the higher frequency range if the source is in the Microwave range for a lower bandwidth Oscilloscope with FFT or RTL-SDR. Keep in mind with the Oscilloscopes or RTL-SDR you'll need a downconverter which can be salvaged from Direct TV or other Satellite TV systems: https://www.rtl-sdr.com/receive-up-to-4-5-ghz-on-your-rtl-sdr-for-5-using-a-directv-downconverter/ and http://www.kd0cq.com/2017/07/but-will-it-mix-receiving-up-to-10ghz-or-higher-with-an-rtlsdr-and-sup-2400-maybe/ For now I am going to stick with the TDS-520 plan and have a more Patrol Truck look like the image in this link: https://en.wikipedia.org/wiki/United_States_National_Radio_Quiet_Zone
I need to note also that we need an SDR# update or separate application to calculate the different Pulse Modulation types when we lock on signals that are not Spread Spectrum or Heterodyning (https://en.wikipedia.org/wiki/Heterodyne & LRAD) style, or maybe even if they are, where they could transmit the subsonic ELF/VLF signals and ultrasonice signals. Even non Ultrasonic source signals could cause damage if we are hit with ultrasonic signals derived from heterodyne or converging signals that create that difference or combined assault signal. Thinking from the lowest assault signal intensity, I'm guessing the signals would have to be human body sympathetic resonance signals, i.e. our bodies bioelectromagnetic signals or those that would disrupt them the most like an entrainment concept where the body can't adjust if to low amplitude.
DeleteThe following post got me thinking about countermeasures which really fall under defense projects more, however I will post here for detection capabilities just in case: http://www.windytan.com/2013/05/descrambling-voice-inversion.html
DeleteFound on: http://educate-yourself.org/mc/mccurrentmcinamerica10mar01.shtml
Delete"I have a roomful of detectors which worked for a few minutes then not at all because the spooks detected their presence and switched transmission modes. One is a simple Radio Shack Stereo Equalizer with the range capacitors 100 times the original value, giving a range of roughly 0.3 Hz to 160 Hz - right in the thick of alleged bioeffective frequencies. I tried driving it with a tin can horn and a hot carrier diode from center conductor to the opposite side of the can, on the advice of a local radar maintenance supervisor (also a radio ham).
The first time I switched it on, the spooks transmitted me an absolutely pure 5 Hz signal for about 10 seconds, turned it off for about a minute, then another 5 Hz signal for 10 sec., then nothing since, INCLUDING observations while my body was full of hot needle in flesh sensations. "
Found some under $5 deals at the Goodwill that will work for signals and wireless components, i.e. 2.4 and 5.8GHz DSSS, DECT 6.0 and FHSS cordless phones that can be sacrificed for parts if I can find the need to use. I have some off topic RC projects I want to use them for more-so also. I did pick up a webcam for $1.99 that may work as a sensor that is non-contact for detection also. Strangely, I found a book by a Dr. Gerber called A Practical Guide to Vibrational Medicine: Energy Healing and Spiritual Transformation that I picked up for ~$1. Great trip. Now to pick up the rest of my amateur radio fox hunting kit and try to write some procedures in more detail for other victims to see and hopefully use as well as try to make some better antennas to detect signals better in more detail. See the above Sept. 5th post for some new references where the ELF publication is really inspirational in regards to what I was already thinking and planning on performing and looks like my work will be (or at least is planned to be) in more detail.
ReplyDeleteGetting the RTL-SDR kit put together and performed some functionality tests. I haven't used the SDR#, Touchstone, RF Explorer or RTL-SDR's since last winter and found that one of my SMA antennas connection went bad for the RTL-SDR's so I only have the MCX antenna to test with currently. My Radio Shack discone antenna is installed elsewhere as is my whip. I've ordered some new connectors for the RG-58A/U cable I had in my mobile case and yesterday picked up my LMR-400 cable since I have some LMR-400 SMA crimp connectors.
ReplyDeleteAfter reviewing a previous post software recommendation that was noted as slow (rtlsdr-scanner: https://hackaday.com/2014/11/19/rtl-sdr-as-a-spectrum-analyzer/ ), I am agreeing that the software is slower than the Touchstone Software which the newer version has an equivalent or larger bandwidth with decreasing performance the larger the bandwidth is an still faster without all the Python related dependencies. Therefore, I will just use a RTL-SDR or the RF Explorer with better performance with Touchstone.
On the Hackaday.com link (note I originally found the rtlsdr-scanner on another site that I don't have the link off hand) I found a new software Fosphor that I may test and report some results (http://osmocom.org/projects/sdr/wiki/fosphor).
I did find another software that I want to review for VSWR testing of antennas using an RTL-SDR from a RTL-SDR.com tutorial dated March 11, 2015: https://www.rtl-sdr.com/rtl-sdr-tutorial-measuring-filter-characteristics-and-antenna-vswr-with-an-rtl-sdr-and-noise-source/
The software is "Spektrum" (https://www.rtl-sdr.com/spektrum-new-rtl-sdr-spectrum-analyzer-software/) noted from a November 6, 1025 RTL-SDR.com post. The info is as follows:
SPEKTRUM: NEW RTL-SDR SPECTRUM ANALYZER SOFTWARE
Recently a reader of RTL-SDR.com, Pavel wrote in to let us know about a new program called “Spektrum” which he has written. Spektrum runs on Windows and Linux and turns an RTL-SDR dongle into a spectrum analyzer in a similar way to rtl_power GUI front ends and RTLSDR Scanner. However one key improvement is that it is based on a version of rtl_power that has been modified by Pavel in order to make it more responsive and remove the need to wait until a full sweep is completed before you can see any results. The modified version of rtl_power can be found at https://github.com/pavels/rtl-sdr.
Spektrum also has an additional “relative mode” feature. This allows Spektrum to be easily used together with a wideband noise source to measure things like filter characteristics and the VSWR of antennas. See our previous tutorial on this here, but note that in our tutorial we used Excel instead of Spektrum to do relative measurements.
The Processing language was used to create Spektrum and Pavel has also released his processing library for accessing rtl_power functionality over at https://github.com/pavels/processing-rtlspektum-lib/releases.
Ready to use releases of Spektrum for Windows and Linux 64-Bit OSes can be downloaded from https://github.com/pavels/spektrum/releases. Note that there may be a bug with the current release which causes only a gray window to show, but we’ve contacted the author about it and it may be fixed soon.
I found another RTL-SDR use for measuring VSWR from https://www.rtl-sdr.com/ September 20, 2017 post. This link contains the following information:
DeleteUSING A TV ANTENNA TAP AS A DIRECTIONAL COUPLER FOR ANTENNA MEASUREMENTS WITH AN RTL-SDR
Over on his blog Tomi Engdahl has been exploring his options for measuring the VSWR of antennas with an RTL-SDR. As discussed in one of our previous tutorials, by using an RTL-SDR, noise source and directional coupler it is possible to roughly estimate the resonant frequency of an antenna.
However, being without a directional coupler Tomi looked for other options and realized that cheap TV antenna network taps are also directional couplers. Taps are commonly used with Cable and Satellite TV installations to split a signal from an antenna over multiple TVs. They are designed as directional couplers to ensure that unwanted signals do not feed back into the antenna system and so that there is a pass through port to continue the strong signal down a long cable.
Note that there is a difference between a tap and a splitter. Taps are used when multiple devices need a signal over a long run of cabling. A splitter divides the signal strength by the number of out ports and can feedback unwanted signals into the system.
Taps vs. Splitter Example (Source: http://forums.solidsignal.com/showthread.php/5843-Solid-Signal-s-WHITE-PAPER-The-NEW-DIRECTV-Residential-Experience)
Taps vs. Splitter Example (Source: http://forums.solidsignal.com/showthread.php/5843-Solid-Signal-s-WHITE-PAPER-The-NEW-DIRECTV-Residential-Experience)
In his tests Tomi found that TV taps worked acceptably well to determine the resonance frequency of an antenna that he was testing. Taps can be found for as cheap as $2 on sites like eBay, although for some listings it is unclear over what frequency range they work well at as sellers assume that they will be used for TV frequencies.
Tomi also tested to see if he could use a signal splitter instead of a directional coupler tap. His results showed that the splitter still worked, and he was able to see the resonant points, but the results where not as good as with the directional coupler.
Well, with the antenna on the one RTL-SDR (Full Band 100KHz-1.7GHz UV HF RTL-SDR USB Tuner Receiver R820T+8232 Ham Radio) broken and a new one needing to be made and tuned and the MCX RTL-SDR cheap $10 one acting up (stops working after a minute or two using)... I decided to invest in a new RTL-SDR.com v3 and NooElec NESDR SMart so I can compare the two. I ordered an FM Block Filter from RTL-SDR.com also to see the difference in performance. These both have the SMA outputs so all the RTL-SDR's will have SMA antennas and if I have the time I can hack the old MCX $10 RTL-SDR to test upgrades and mods since that one keeps overheating or something that causes it to stop playing/working in SDR# and Touchstone.
ReplyDeleteI also decided for antenna tuning and to try like noted in the above comments VSWR measurement with a tap since the RTL-SDR's are 75 Ohm and compare with the oscilloscope also using a Directional Coupler that is 50 Ohm. Therefore, I ordered off ebay a "Antronix 9db Directional Coupler DC9 coax TV cable T Tap digital CATV CMCDT2109T" and a "Mini-Circuits ZFDC-10-5-S Coaxial Directional Coupler 1-2000 MHz"
Looking forward to receiving these as the RF Explorer isn't my favorite for the base station. I do like as with the AOR-mini which is more of a pain to program... for portable hand held hunting so I don't have to walk around with the laptop. With the AOR-mini I have more functions obviously when scanning, however as with considering a PRO-2006 modified (discrimination signal output, faster scanning, adding functionality, etc.) for a base station... I really think I should upgrade to a P25 Phase 2 system for more options unless I can find a software application that will process the more modern trunking and modes at the base or I guess potentially modified in a mobile rig.
I still haven't gotten around to the Android systems yet... seems a tablet or smart phone application with adapter would be suitable too for portable hunting and pin pointing sources.
Man, I want to start building some antennas... however I really can only finish one end of the antenna or feed line (cable) until I get a system together to measure the SWR and impedence at least.
I'm thinking I'm going to make a Spiro Helical (not sure with what yet, maybe spring or smaller wound coil), Dual Helical (using house electrical wire and try some with copper craft tape), Conical Helical (using copper craft foil tape over a styrofoam or cardboard cone), and some normal mode whips I think is the term for the hand helds.
I'm also thinking I can extend the bandwidth and even gain off the discone antenna with a driving element that is a normal mode helix antenna. Seems correct.
I also want to make some loop antennas for the lower ELF/VLF systems. I have to read more regarding interfacing a microphone with a RF antenna since one output (the microphone) is an Audio Signal and one output (the loop antenna) is RF signal. I am not sure how these will work, though seems if the impedence is matched and the antennas are tuned for a flat response avoiding overlap with a crossover basically, filter or equalizer for the top end of the loop antenna then that should work mixing the two signals.
I'm kind of wondering like with the Rodin Coil antennas that are wide band and lower resonance when placed in a tube with ferrite powder (I can't find the link as I thought was on cheniere.org or jnaudin.free.fr/html/rcoil.htm pages)... if you can take a loop antenna and say if inside a hoola hoop or tube... fill the tube with ferrite or muMetal powder to lower the frequency.
DeleteThere are definitely loop antennas that wrap around ferrite rods though this is difference in effect on the eleictric and magnetic fields. Examples:
http://www.am-dx.com/antennas/Ferrite%20Sleeve%20Loop%20Antennas.htm (use wayback machine and I am still searching for the christmas wreath case size antenna version)
https://swling.com/blog/tag/ferrite/
http://billydiy.blogspot.com/2015/09/230mm-9-ferrite-sleeve-loop-coil.html
www.free-energy-info.com/Rodin.pdf
https://www.cia.gov/library/readingroom/.../CIA-RDP78-03424A000500010007-0.pdf
How to make your own ferrite (was thinking at first I could place rods in a blender):
http://www.instructables.com/id/Make-your-own-Ferrite-to-improve-magnetic-fields/
Will be interesting making some fractal antennas also.
I've been wondering about using carbon fiber as an antenna also, though there isn't much info on. I'll have to research more the properties of carbon fiber at different frequencies to see if the information is even available.
Alright... feeling like I am starting to move forward again and not backwards. Received some of the coax cable connectors that I had ordered for the RG-58 and LMR-400 cable I have. I also received the Type F female to BNC Female adapters since I have a dish outside with two Type F coax cables and I want to test their line characteristics, as well as with different antennas at the outside end, inside with the oscilloscope and other test equipment.
ReplyDeleteSince I don't have the RG174? used with the SMA antenna with the bad connector (unfortunately crimped) I have here, I wound up soldering 2" (completely random length) of RG58 to the end of the SMA coax after I cut the bad connector off so I could splice the ends of the RG174 and RG58 then crimp on a Male SMA connector to the other end of the RG58. I did have to solder the male tip of the connector so I should note I broke out the soldering iron and controller that I picked up on ebay for ~$30 (Weller WLC100 and SPG40). Works!!! The antenna, soldering iron and controller station.
Now I can use the RTL-SDR (Full Band 100KHz-1.7GHz UV HF RTL-SDR USB Tuner Receiver R820T+8232 Ham Radio) with the SMA antenna I have that came with the RTL-SDR.
Today, I received the LMR-400 SMA male crimp end connectors so I can start making antennas with that cable I have as well as the RG58 SMA male crimp end connectors with the RG58 cable I have. I'm excited now!
I also pulled out the modified custom tape measure style yagi I started working on last winter (actually I started calculations two winters ago shortly after earning my Technicians license). I found that I am missing a telescoping antenna and I think that is at the farm with the other antennas. Actually, I am not sure with that one. I modified so the boom is telescoping as well as all of the elements. I am thinking instead of the hairpin where I was going to use banana plugs for three hairpins, I am going to use a variable capacitor I think. I have to read some more on this and verify range of the hairpins capacitance/inductance if not actually test to see the values.
Even so; I can move forward with working on that antenna, the new conical spiral antenna that I have a foam core for (I am not sure if I want to use that as a mold like the orange road cone marker I have and was thinking can either make the antenna with paper mache, fiberglass or another material yet determined or just use the foam cone and road cone), dual helical and quadrifilar helical, ELF loop antennas, ELF rodin coil antenna and VLF loop antenna(s).
Along with the coax cable, I have some house wiring, copper pipe, 1/4" copper foil and other wire around I can use (various sizes of magnet wire). I may order some Litz wire for the loop antennas though I need to read up more. I do have a section of 6" aluminum expandable duct tube that may be suitable for a loop antenna also.
I also received the EEEkit 1200M Wireless USB Adapter since the first one I bought last winder on eBay wasn't working. Interesting enough, looks like was an antenna issue. EEEkit service was unbelievable as they sent me a new USB Adapter so now I have two. I would up finding a Linksys WRT54GX vers.2 for $5.99 at the Goodwill with three antennas... tried one and the first adapter worked with the different antenna. Go figure! Now with potential to get better 2.4 and 5.8GHz signals, I can connect to the wireless service in the area and also today paid for a month service so I can stay put and post my progress. Plus, I have other work I have to do too.
DeleteBack to the RTL-SDR... I tested the rtl_scanner application with the MCX $10 SDR dongle that doesn't work after a minute or so. The application was really slow and requires a bunch of Python dependencies that also make the application slow. Still, to be fair I should test with the SMA RTL-SDR to see performance and value added benefit. Therefore, I will test with the other SMA RTL-SDR to see how it works though I am guessing is slow compared to the application Spektrum. Spektrum seems impressive to me from my instinct perspective compared to rtl_scanner. For now, I'm going to focus on antennas construction based off my calculations I have.
DeleteWould be awesome if I could get the Wireless USB Adapters to work with SDR#, Touchstone, rtl_scanner and Spektrum. I'm sure there is a way, though I am going to have to read into the programming more and for now I am in hardware mode. Same goes for the RTL-SDR with the RF Explorer application. The RF Explorer application seems to only work with the RF Explorer and unfortunately I do not have the 5.8GHz module.
I wasn't really planning on constructing a ELF/VLF ferrite loop stick antenna ( http://www.circuit-finder.com/categories/radio/antenna/578/long-loopstick-antenna ), though found this design ( http://www.aaronia.com/products/antennas/Magnotracker-ELF-6/ ) that inspired me as well as the www.stormwise.com designs using mu-Metal instead.
DeleteMy thoughts on the loop antennas at first were along the lines of this type: http://www.rfcafe.com/references/electronics-world/vlf-loop-antenna-january-1963-electronics-world.htm
Or if not a loop, something more like this: http://www.qsl.net/ik2pii/lf/lfequip.htm
Or this spiral design around a tree: http://www.pg1n.nl/articles.php?lng=en&pg=416
Or the larger coils: https://sites.google.com/site/g3xbmqrp3/vlf/8-97khz-earth-mode-transmitter, https://sites.google.com/site/g3xbmqrp/Home/earthmode, https://sites.google.com/site/sub9khz/, http://www.w4dex.com/vlf/8971Hz/index.htm and this different design that is more compact: http://air-radiorama.blogspot.com/2016/01/antenna-elf-di-renato-feuli-ik0ozk.html
I then was reminded of the Rodin coils (and today found their jnaudin related links I referenced in a previous post: http://jnaudin.free.fr/systemg/html/systest.htm and http://jnaudin.free.fr/systemg/html/sysGtst2.htm ) and wanting to try one out sometime to see their purported wide/broad band characteristics outside of the "free energy" world as I find like one of my Ham instructors noted can be done as with a flat spiral pancake antenna and coil, though not supposed to be at least under a power line since is illegal and stealing. :-|)
Therefore, I'll salvage around for ferrite and see what the limited budget can afford before I spend on ferrite, muMetal, magnet wire or litz wire.
I do see that the material used for the Rodin Coil (or technically CHTA et.al.) antennas are iron powder and not ferrite as I noted in an above post.
Realizing that I need to modify this blog into a webpage so I can post images or read on how to post images and videos on a blogger.com site. I'm thinking this because I should probably take screen shots of what I am doing if not like I find is built into Kali Linux 17.1, the screen recorder to record my sessions as I have downloaded this application for use in Windows 7 Pro.
ReplyDeleteHowever, I did test the EEEkit 1200M Wireless USB Adapter with the RP-SMA female crimp connected to a piece of LMR-400 (probably should have measured to theoretically tune better) with a BNC female crimp connector on the other end with the Type F female to BNC male adapter connected to the Type F cable line going to the Direct TV Satellite Dish. That didn't work as well as the EEEkit antenna or WRT54GX vers2 antenna.
However, using the RTL-SDR (Full Band 100KHz-1.7GHz UV HF RTL-SDR USB Tuner Receiver R820T+8232 Ham Radio) UV input with the SMA male to BNC male adapter connected to the BNC female to Type F female adapter connected to the Type F male cable line going to the Direct TV Satellite Dish... I found with Spektrum interesting results that weren't as flat line of a response with better reception in certain ranges of the observed spectral range, i.e. 88MHz to 2100MHz. Unfortunately, I haven't got into the code of Spektrum to expand on the range beyond 2100MHz if feasible though do have that noted as something to do when I get around to coding again. With SDR# the FM band looked and sounded really good compared to the the repaired SMA about 12" long antenna that came with the SDR. I looked at the 1420 and some higher bands I found as well as ~162.500 that were coming in. I still need to study more once I get the directional couplers and tap VSWR test system configured.
In regards to the directional coupler and tap... the ones I ordered off ebay a "Antronix 9db Directional Coupler DC9 coax TV cable T Tap digital CATV CMCDT2109T" and a "Mini-Circuits ZFDC-10-5-S Coaxial Directional Coupler 1-2000 MHz"... I received them today along with the NOOelec RTL-SDR and the female MCX to SMA male adapter.
Now in regards to signal generators and the ability to sweep the frequency or create noise... I need to restart my research work again. I thought the RF Explorer had the function, though with the v1.20 Firmware upgrade that option went away or was only present as a firmware appearance without the real function in the hardware. I have to read more into the subject. So, I do have a "DDS Function Signal Generator Sine Square Sawtooth Triangle Wave Frequency 5/12v" that will create noise and a range of signals and waveforms. I have to read more into that system also.
Man, I still have the soldering and "USB Boost Single Turn Dual Power Supply Linear Regulator w/ Multiple Output R0N5" kit to build to practice electronics before I get into the TDS-520 (supposed to be A as described) repair(s).
The TDS-520B does have a 1kHz signal PROBE COMPENSATION source though that doesn't help unless there is some sort of MATH function that can generate a different range of signals and sweep. I guess I could make a mixer, though that is more than I want to get into at the moment. Seems like a broad range transmitter project that would be better suited as a signal generator with modulators, filters, amplifiers and multiplexers/encoders if and when I am ready to do that.
DeleteNow that I think about it the "DDS Function Signal Generator Sine Square Sawtooth Triangle Wave Frequency 5/12v" (I think is called a AVR DDS V2.0 signal generator) may need the above power supply to work. I thought the claim was that the signal generator worked up to 10000MHz... though can't seem to find the original listing info on eBay (only the purchase history) and similar listings from the seller note 8MHz range.
I took apart the WRT54GX vers.2 since I found that can't be upgraded with the OpenWRT or even supported much by CISCO/Linksys so I figure like I found a practical application of the antenna... I'll take off the WiFi card and antenna to use the three antennas thinking they're all connected by a splitter or something with one connection for the EEEkit USB adapter. To my surprise, the antennas have a really small connection that go to individual circuits on the Airgo Networks card (looks like a laptop memory card plug) that I think is a male MC (Lucent) connector where the female MC connector is on the network card. I'm not sure about de-soldering the female MC and making a splitter to couple the three antennas. This may be a bad idea until I can test antennas at the higher frequencies and I don't have the 6Ghz module RF Explorer with/or Signal Generator or the RF Explorer Signal Generator I have which is the 2.3-2.5GHZ and 15-2700MHZ... I guess at least. I have to see if the claim is true regarding the "DDS Function Signal Generator Sine Square Sawtooth Triangle Wave Frequency 5/12v" in regards to signal generation range.
I also have a "Precision Radio Frequency Counter Professional Tester Meter Tool (0.01Hz - 2.4G)" and just ordered a PRO-2006 so I have to use as a better scanner/frequency counter/heterodyne receiver to compare to. I almost think I should sell the 0.01Hz to 2.4G one, though will keep for testing for now until I can verify I can expand the range and find utility. I originally thought would be good for quick transmission and hunting tests which I don't think I'm wrong. The counter may be modifiable also for expanded use.
I also found a moldy, with lots of growth on the belt/pulley, cardboard and wood, "Playback Model PB8/TSJ STOCK 01-1004" 8 band solid state radio version that looks like based on the handle is not a KTR-1661 and more like the KTR-1665. I at first thought I can use the parts... though since was my Dad's and I recall hearing and admiring when I was younger in the late 70's and early 80's... I'll restore first and then maybe modify since is a super-heterodyne receiver from what I have found reading. Maybe I can add bandwidth and use the output too.
Wow, so I have plenty of projects to work on now. I'm thinking the signal generator up to 6GHz is going to be the next addition as well as a directional coupler above 2GHz and below 1-2MHz and at 50 Ohm or less. I don't think I need those ranges at 75 Ohm. Seems older radios I recall used to be 30 ohm and in the lower frequency range.
I wonder if I can use the Baofeng UV-82 handheld (I have two, a 1.25m/70cm and 2m/70cm) as a signal generator. Probably with hacking, though man... the SDR systems are rough for a amateur solderer to modify if even able to be is my guess.
Other than that... I can focus on more testing with what I have, making the VSWR and impedance testing system and creating some procedures. I do almost think a TDR system might not be a bad idea also for measuring feed line and coax. I'll read into that some more.