Mike posted:
<<
so, are we saying that tube design would work?
BTW. I want no more than 500mw to a watt out of that solid state FM
transmitter. Will that circuit do about 500mw with 2n3053? its rated at
100mhz, and I have 2 of those on hand. If i build that circuit with those 2
transistors, and should I expect about 500mw to a watt? or so?
im just looking for a simple easily makable FM or AM transmitter that is
about 1 to 4 watts or so.
i already have a 1 watt AM transmitter, but it dont get crap for range. 30
feet at most.
Dbowey said:
Tam posted:
(snip)
<< On the tube amp, I have the 807 data sheet, and that looks like it may
legally do 20W out at 100MHz. Somebody mentioned the 6146, which sort of
replaced the 807, 50 some years ago. It will do around 40W at 100 MHz, but
has nothing in common with the 807. Different size, and different number of
pins. I don't know where the EL34, or equivalent, comes in. I thought that
was a single ended audio tube.
In the 50s, when the Novice license began, they were permitted to use AM on 2
Meters. The Harvey Wells TBS50 transmitter helped fill that market. It's 807
final could provide 5 Watts input at 145 MHz. On HF it would coast at 50W.
I was commenting on the 807 posts, not an FM transmitter.
Building an 807 transmitter for the FM band is a really bad idea. Not only is
it inefficient, it requires about 400 Volt, which is dangerous, and the
filament current alone could power a decent xstr amp.
The xstr FM transmitter, to which you posted a link, is a poor design using a
puny final.
Also, what you want to do is illegal, so I can't help you.
Don