4 watt transmitter

[wrxsti360]

hello every one.i am after a bit of info ,does any one know what gauge wire to use for the 4 transitor fm transmitter .and the coil that is printed on circuit board any idea how many turns with a normal coil?  i have built the 2 transistor fm transmitter with t2 as a 2n3553 instead of the 2219 and used a circuit to amplify a electret mike.it works brilliant. i have got a good mile out of it. i am not interested in playing music or anything like that.just get a kick out of knowing i built it then seeing how far i can hear my signal with a portable radio.the mike circuit does a good job i can hear my clock ticking in the bedroom i suppose you could class it as a super powerfull bug    thanks Dave][color=Black

 

[Bold368]

I just finished this project as well.  20 or even 18 guage solid strand works very well.  I used coils taken from a dead CB radio and modified them a bit to get the correct turns.  Works awesome, coils dont even heat up.

 

[wrxsti360]

hello bold 368, so you are pleased with your transmitter?i am new with working with vhf projects and know there is a lot to go wrong.i suppose i am lucky even to get the few i have built working from what i have read on here.i know i am being a bit cheeky but how many turns did you use for L 4 HAS IT IS PRINTED ON CIRCUIT BOARD IN KIT FORM .ALSO IT SAYS D1 IS A 1N4148? I THINK I MUST BE THICK BUT I CAN NOT SEE IT ON CIRCUIT PICTURE.  JUST REALISED I HAVE HIT THE CAPS LOCK KEY,STILL NEW WITH COMPUTERS. THANKS DAVE T

 

[audioguru2]

It says D1 is a 1N4148? I think I must be thick but I cannot see it.

It is a Greek kit and project. D1 is part of the detector used to tune the project and is shown on the Greek version's page 1.

 

[wrxsti360]

ok thanks i will check page 1 out.cheers mate

 

[Bold368]

LOL, i think we built different transmitters!!  i built the one by Kyriakos Kontakos.  2 high power transistors instead of 4 smaller ones.  sorry my mistake!

 

[audioguru2]

LOL, i think we built different transmitters!!

This kind of confusion wouldn't happen if you make a link to the project or attach the schematic.