We seek to understand and document all radio transmissions, legal and otherwise, as part of the radio listening hobby. We do not encourage any radio operations contrary to regulations. Always consult with the appropriate authorities if you have questions concerning what is permissable in your locale.

Author Topic: another Guerrilla transmitter is born.  (Read 2569 times)

Offline RadioAnarchy

  • Jr. Member
  • **
  • Posts: 43
  • south Louisiana swamp, bayou, and gator country.
    • Yahoo Instant Messenger - radioanarchy
    • View Profile
    • Radio Anarchy
    • Email
another Guerrilla transmitter is born.
« on: September 13, 2013, 0346 UTC »
I got e-mails about low power out from this circuit.
Only about a  watt or so...

http://www.angelfire.com/de/RadioAnarchy/

I went to Radio Shack and got the capacitors there...
and at work today figured out a circuit board plan to cut
out with the Dremel tool on some double sided copper board
.. .did not take long...

at first power up, I got about 5 watts of power... then I added another turn to L3 and
go a little more power.... about 7 watts.....   no problems..
for C5 I have two .001 MFD caps in series, for 500 pico-Farad.

so for L3 we should start with 6 to 7 turns,, then unwind..
also the value of these caps at C6 are not that accurate..

if you have a variable capacitor  around 1200 pico-F  for C6, that would be good.

but we are trying to keep it simple and easy, and low cost.. . .

so I built 2 just like this and have no problem getting several watts out of carrier power.
The picture of the O-scope is showing 10 volts per division...across my MFJ 50 ohm dummy load.

I have the IRF510 heatsinked to the copper board.

I will make a diagram with my layout and all...

check it out...
http://www.angelfire.com/de/RadioAnarchy/

« Last Edit: September 13, 2013, 1359 UTC by RadioAnarchy »