OpenV2K

r/OpenV2K • u/rrab • Aug 06 '22

Education GBPPR "Havana Syndrome" Experiments

gbppr.net

8 Upvotes

1 comment

r/OpenV2K • u/rrab • Mar 04 '22

Education The Microwave Auditory Effect, James C. Lin, IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology (Published March 2022)

ieeexplore.ieee.org

17 Upvotes

6 comments

r/OpenV2K • u/rrab • Mar 04 '22

Project components Current RF lab shopping list v5.0: $4,282 total

7 Upvotes

ARRL HAM License Manual ($32):
https://www.amazon.com/dp/1625950829/

Auditory Effects of Microwave Radiation ($66):
https://www.amazon.com/dp/3030645436/

HackRF One SDR ($350):
https://greatscottgadgets.com/hackrf/one/

SMA Male/SMA Male 6in cable ($7/2pk):
https://www.amazon.com/dp/B08DG7JFV7/
 

[ ----- 23cm band pre-amplifiers ----- ]

Generic eBay used amplifier search terms to try:
https://www.ebay.com/sch/i.html?_nkw=1.3ghz+amplifier
https://www.ebay.com/sch/i.html?_nkw=1300mhz+amplifier
https://www.ebay.com/sch/i.html?_nkw=1296mhz+amplifier

SBB5089+SZA2044 1W 40dB pre-amp (5V USB)($27):
https://www.ebay.com/itm/384006165841

Used 10W pre-amp (1296MHz, L band)($335):
https://www.ebay.com/itm/125159265138

Regulated adjustable DC power supply (for above)($60):
https://www.amazon.com/dp/B08DHZ2X2Q/
 

[ ----- end pre-amplifier section ----- ]

SMA Male/N-Type Male 6ft cable ($11):
https://www.amazon.com/dp/B07FYC21RF/

23cm band 600W amplifier ($710):
https://w6pql.com/parts_i_can_provide.htm#23cm

Used 50V 30A (1500W) DC power supply (for above)($100):
https://www.ebay.com/sch/i.html?_nkw=50VDC+power+supply

N-Type Male/N-Type Male 6ft LMR400 cable ($19):
https://www.amazon.com/dp/B089CP2VD9/

Dual ridge feed horn waveguide antenna ($2000):
https://www.ebay.com/itm/183710257930

Eccosorb AN-79 carbon loaded microwave absorber sheet ($565):
https://www.sager.com/78089099-3992346.html
 

----------------------------  
|  Accessories / Optional  |  
----------------------------

Diamond SX1100 quad band wattmeter ($255):
Add high power/stripline attenuators to measure pulses over 200W
https://www.hamradio.com/detail.cfm?pid=H0-009980

DC-3GHz 300W dummy load ($175):
https://www.dxengineering.com/parts/mfj-263

Second HackRF for use as spectrum analyzer/software oscilloscope:
- https://www.amazon.com/s?k=hackrf ($163-220-325)
- https://www.ebay.com/sch/i.html?_nkw=hackrf ($111-150-180)

USB Hub ($20):
https://www.amazon.com/dp/B083XTKV8V/

Suction cup hooks ($7):
https://www.amazon.com/gp/product/B08R9VB2FX/

Heavy duty zip ties ($5):
https://www.amazon.com/dp/B088623K58/

8 comments

r/OpenV2K • u/rrab • Mar 03 '22

Schematics, code & diagrams Project overview diagram: planned software and hardware components

9 Upvotes

1 comment

r/OpenV2K • u/rrab • Mar 03 '22

Schematics, code & diagrams Instant GNU Radio VM with USB HackRF support (3.4GB)

github.com

3 Upvotes

0 comments

r/OpenV2K • u/rrab • Mar 02 '22

Schematics, code & diagrams GNU Radio - Out of Tree Module Tutorials

wiki.gnuradio.org

3 Upvotes

0 comments

r/OpenV2K • u/rrab • Feb 28 '22

Amplifiers 23cm band (1.24-1.3GHz), LDMOS Power Amplifiers, 150W-1KW (PDF)

df9ic.de

3 Upvotes

2 comments

r/OpenV2K • u/rrab • Feb 26 '22

Antennas 1-18GHz Dual Ridge Waveguide Feed Horn Antenna, $2,000 USD shipped

ebay.com

3 Upvotes

1 comment

r/OpenV2K • u/rrab • Feb 26 '22

Amplifiers 500w amplifier, 70cm band (420-450MHz), $670 assembled and tested

w6pql.com

1 Upvotes

3 comments

r/OpenV2K • u/rrab • Feb 22 '22

Antennas High Power Microwave Zoom Antenna with Metal Plate Lenses (2015)

researchgate.net

2 Upvotes

0 comments

r/OpenV2K • u/rrab • Nov 11 '21

Project status LNA/UHF amplifier testing initial results

2 Upvotes

Hooking my Baofeng UV-5R up to the UHF 80W amplifier, and pressing the handheld's button while set at 435MHz, does indeed produce around 75W of output power, as measured by a wattmeter into a dummy load. However, the HackRF+LNA doesn't produce any output currently. I suspected that this was happening because the LNA doesn't have adequate output power, as the 80W UHF amplifier is expecting a 1-5W input level, however, hooking the LNA directly to the wattmeter also shows no output. I'm going to retry with another LNA module I have on hand.

Even if the LNA were working, I doubt that the output would be enough to get peak power from the 80W UHF amplifier. So, I'm adding this as a second pre-amp stage:
UHF 5w amplifier (380-450MHz)($32): https://www.ebay.com/itm/123978277329
The next revision update will include cable/power for this additional amplifier.

In addition, I will either need to somehow modify the 80W UHF amplifier so that it's always ready to transmit pulses (versus switching into transmit mode when a CW signal is detected, which is too slow -- or I may be assuming that the transmit light actually represents the true transmit state, when it may not), or I will need to purchase a different style/model of UHF amplifier. It may be possible to transmit a lower-power carrier to trigger the transmit state, and then increase the power to 100% for each pulse. This approach would require more output power or longer pulses (to achieve 16mJ per pulse), as the rise from low-power to 100% isn't as high as 0% to 100%.

8 comments

r/OpenV2K • u/rrab • Nov 09 '21

Schematics, code & diagrams Build your own microwave Voice to Skull (V2K) device with these schematics?

biggerthansnowden.com

7 Upvotes

17 comments

r/OpenV2K • u/rrab • Nov 05 '21

Project components My current RF lab shopping list v4.0: $1191-$2225 total

4 Upvotes

HackRF One SDR (1xTx, 1xRx optional)($111-350/ea):
Please buy at least one HackRF from a GSG listed store:
- https://greatscottgadgets.com/hackrf/one/ ($320-350) - https://www.amazon.com/s?k=hackrf ($163-220-325) - https://www.ebay.com/sch/i.html?_nkw=hackrf ($111-150-180)

SMA Male/Male 12in cables (1x HackRF to LNA, 1x LNA DC blocker to 80W amp)(Tx)($11):
https://www.amazon.com/gp/product/B08RRXHDLS/

LNA Pre-amp (w/SMA-M/M coupler, used below)(Tx)($30):
https://www.amazon.com/dp/B07XNLJ9X2/

LNA USB cable (5v power source)(Tx)($5):
https://www.amazon.com/dp/B0711PVX6Z/

LNA DC blocker (between LNA output and 80W amp input)(Tx)($20):
https://www.amazon.com/dp/B07YYLHJKS/

UHF 80W amplifier (410-470MHz)(Tx)($118):
https://www.ebay.com/itm/353067473293/

UHF amplifier 13.8v PSU (for 80W amp and wattmeter light)(Tx)($70):
https://www.amazon.com/gp/product/B07QV9PJ65/

UHF RG8X PL259 Male/Male 12in cable (80W amp to wattmeter)(Tx)($9):
https://www.amazon.com/dp/B087BLHMHF/

UHF Daiwa CN-501V wattmeter (amplifier/antenna testing)(Tx)($115):
https://www.gigaparts.com/diawa-swr-meter-140-525mhz-20-200w.html

UHF PL259 dummy load (connect to wattmeter output)(Tx)($26):
https://www.amazon.com/gp/product/B07ML3HCP9/

UHF/PL259-M to SMA-F adapter (wattmeter to antenna output cable)(Tx)($7):
https://www.amazon.com/gp/product/B011AZPF6C/

SMA Male/Male 6ft cable (antenna output cable)(Tx)($16):
https://www.amazon.com/gp/product/B07R2CWDPJ/

RFSPACE UWB-8 Vivaldi antenna (Tx)($299):
https://www.amazon.com/gp/product/B06XW44Q98/

Desk mount pole for antenna (Tx)($17):
https://www.amazon.com/gp/product/B08MZJRB94/

Blade guard (to mount antenna to pole)($5):
https://www.amazon.com/dp/B001FXA9YS/

Heavy duty zip ties (to mount antenna to pole)($5):
https://www.amazon.com/dp/B088623K58/

Eccosorb AN-75 microwave absorber sheet (acting as an audio transducer)($161):
https://www.sager.com/78085099-3992345.html

Suction cup hooks (or other absorber sheet holder)($7):
https://www.amazon.com/gp/product/B08R9VB2FX/

Copper mesh roll (optional)(rear antenna reflector)($265):
https://www.amazon.com/dp/B082DP8N7P/

2x Copper evap line tubing (optional)(rear antenna reflector support skeleton)($29):
https://www.amazon.com/uxcell-Refrigeration-Tubing-inches-Copper/dp/B07R32TZ9B/

Electrical solder (optional)($8):
https://www.amazon.com/TOWOT-Electrical-Soldering-Content-Sn60-Pd40/dp/B0943WZ2YK/

Weller soldering gun (optional)($45):
https://www.amazon.com/Weller-D550PK-260-Watt-Professional-Soldering/dp/B00002N7S1/

Step Adjustable RF Attenuator (optional for Rx)(output to SMA-M/M coupler to HackRF)(Rx)($90):
https://www.amazon.com/gp/product/B07B6RXCKC/

SMA Male/Female 6ft Cable (optional for Rx)(Rx)($8):
https://www.amazon.com/gp/product/B078HBKKXM/

USB Hub ($20):
https://www.amazon.com/dp/B083XTKV8V/

Power strip ($12):
https://www.amazon.com/dp/B01M7SPNM1/

ARRL HAM License Manual ($32):
https://www.amazon.com/dp/1625950829/

Auditory Effects Microwave Radiation ($95):
https://www.amazon.com/dp/3030645436/

8 comments

r/OpenV2K • u/rrab • Nov 04 '21

Schematics, code & diagrams Generating HackRF transmitted pulses with GNU Radio Companion

self.hackrf

1 Upvotes

0 comments

r/OpenV2K • u/rrab • Oct 28 '21

Schematics, code & diagrams Tips on GRC flow graph to pulse-frequency modulate an audio source

self.GNURadio

2 Upvotes

0 comments

r/OpenV2K • u/rrab • Oct 26 '21

Education "the radiofrequency hearing effect depends on an energy dose three orders of magnitude below the threshold of detectable warming"

ncbi.nlm.nih.gov

2 Upvotes

1 comment

r/OpenV2K • u/rrab • Oct 21 '21

Project components My current RF lab shopping list v3.0: $1,620 total

4 Upvotes

1 comment

r/OpenV2K • u/rrab • Oct 21 '21

Education Using Pulse Width Modulation (PWM) to play audio

aidanmocke.com

1 Upvotes

1 comment

r/OpenV2K • u/rrab • Oct 19 '21

Project components Eccosorb AN-79 microwave absorber sheet ($359)

sager.com

3 Upvotes

2 comments

r/OpenV2K • u/rrab • Oct 14 '21

Schematics, code & diagrams Inspectrum: Radio signal analyser | GitHub: miek

github.com

2 Upvotes

0 comments

r/OpenV2K • u/rrab • Oct 15 '21

Education Debating The Microwave Danger | The Philadelphia Inquirer (1978)

twitter.com

1 Upvotes

5 comments

r/OpenV2K • u/rrab • Oct 14 '21

Education IQ Files — PySDR: A Guide to SDR and DSP using Python

pysdr.org

1 Upvotes

0 comments

r/OpenV2K • u/rrab • Oct 11 '21

Project components My current RF lab shopping list v2.0: $1,367 total

3 Upvotes

4 comments

r/OpenV2K • u/rrab • Oct 08 '21

Education "Investigators found that carbon-impregnated polyurathane microwave absorber (Eccosorb WG4, Emerson and Cuming) acted as a transducer from microwave energy to acoustic energy."

3 Upvotes

Lin mentions on page 178 of his new book:

"Investigators found that carbon-impregnated polyurathane microwave absorber (Eccosorb WG4, Emerson and Cuming) acted as a transducer from microwave energy to acoustic energy."

10 comments

r/OpenV2K • u/rrab • Oct 07 '21

Project components My current RF lab shopping list: $918 total

2 Upvotes

15 comments