[Milsurplus] TBW Transmitter power-ON

[Marty Reynolds]

> Occasionally, you can find variable frequency lab inverters on ebay that
> will do the job, if you're patient.
> http://aafradio.org/sidebar/Behlman_100-C.jpg is one example - winning
> bid for this one was only $16.  The only sound is a quiet fan.


Yo Mike

A bargain for Conan the barbarian.  I've seen one of these & they're 1kw
audio amps
driven by a fedback gain cell (ne570?) to hold transformer'd-up output to
110v

I made a 40 watter outa a Sanken hybrid 40w, a ne570, & a 2716(?)
oscillator.  24v-2a
bridge-rect. ps.  12vac-115v 400 hz xfrmr.  Still works.

But primitive compared to those 12V-in / 115v out $14.95 200w drug-store
inverters.

They don't seem able to go much obove 60hz tho.  Scope'll show u each full
sine
divided into 128 (?) intervals of varying width to control output AND
simulate a sine.
So they really do their biz around a 7700 hz clock

Guy that can make 'em run @ 50 khz (400hz out) will be a genius in my
book, a gyro
gearloose in others'

   mr aka aa4rm