[AMRadio] series modulation...???

[Vince Werber]

Hey!  That sounds kwel...

I've been known to build some interesting stuff in years past...
I like to see how many times I can recycle a chassis...

I had a neighbor, who has long since passed over, that used to
roll his own capacitors... and he used carbon rods out of
batteries I think for resistors...

He hand wound a transformer for a welder... in his kitchen...
there was wire every where... he counted every turn... amazing
fellow...  I sure do miss him...  He wasn't a ham but I sure did
learn a lot from him...

FB on the rig... I might have that handbook in my collection...
I got them going back to 1925...  fun to read...  The WWII ones
are my favorites... with all the 'carrier current' stuff...

73
Vince
ka1iic
-.--.

On Tue, 26 Mar 2002, Brett Gazdzinski wrote:

> Vince,
> It had a vr tube in the screen.
>
> 1969 arrl handbook (yellow one) one tube transmitter....
>
> It worked well, I even had qso,s with it!
>
> This was a VERY early project, with making my own cabinet
> using circuit board material and L brackets, winding
> coils on pill bottles, using buttons out of a cash register
> for transmit and receive.
> The green one (ch bgr) was receive and lit up when pressed,
> the red one (lg coke) was tx.
> I am not making this up!
> I built an RF triggered side tone oscillator with a speaker
> in the top of the 'cabinet', tr switching, made a shunt
> up for the meter I had to read plate current, and painted
> the thing black wrinkle finish....
>
> The power supply was separate, using a tv transformer.
> All using parts I got out of tv,s and so on....
>
> Surprisingly, it did not sound horrible on cw....
>
>
> The problem with the circuit under modulation is keeping the
> grid current stable...too much and the crystal breaks, too
> little and it stops oscillating....
>
> Brett
> N2DTS
>
>
>
> >
> > Hi Brett,
> >
> > Was the screen voltage regulated...???  Or was it run via a
> > dropping resistor from the plate supply?  Of course I realize
> > the added mod that one would get by modulating the screen...
> >
> > I know.. weird question... heeheehee
> > 73
> > Vince
> > ka1iic
> > -.--.
>
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