[Amps] "Booster help"

[Gary Schafer]

The 6146 should work but you need a tuned grid circuit and neutralization
and a regulated screen supply. You could get away with out regulating the
screen if it is loaded with resistors enough. Look at some of the ssb
transmitters like heath etc for ideas.

You could also put in a tuned grid circuit and neutralize the 6HF5 amp too.
Don't even think about either one without neutralizing. With that low of
drive power you will have problems.

73
Gary  K4FMX

> -----Original Message-----
> From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
> Behalf Of StephenTetorka at cs.com
> Sent: Friday, November 10, 2006 2:17 PM
> To: amps at contesting.com
> Subject: [Amps] "Booster help"
> 
> Hi Guys:
> 
> Figure if anyone knows...you guys sure would.
> 
> Here's my challenge.
> 
> I picked up a beautiful homebrew SSB generator...K2YOR SK RIP...circa 1957
> -
> 1967'ish...up at Hosstraders before the camping/singing/drinking...great
> trip!
> 
> I got it basically working on 80 & 20...can't say how well as the scope
> patterns are new to me...and just don't exactly match those I've seen in
> the texts
> etc...( took pictures of them if anyone wants to see.)
> 
> The RF output is a 6CL6...with I'd guess ...maybe 0.5 watts out...if that
> much.
> 
> I could try it as QRP...and probably will as its sitting ready.
> 
> But I'd like a little more output - as I've got enough challenges in other
> departments to keep me occupied...
> 
> The only linear I have is a Shoebox II...also homebrew...per CQ Magazine
> July
> 1967...uses 4 each 6HF5's..does FB with a 20 to 40 watt exciter...grounded
> cathode/untunned grid input.
> 
> Soooo...I need a 'booster amp' if I might call it that...to interface
> between
> the 6CL6 and my Shoebox.
> 
> It just so happens that I have a homebrew 6146 using a 12BY7 oscillator.
> 
> Therefore, I thought I'd ask for your generous suggestions before I go
> into
> surgery outputting RF into the grid circuit of the 6146...ie...bias,
> matching,
> plate E and I...etc.
> 
> Kind regards,
> Steve
> WA2TAK
> Keepin them glowin...
> 
> 
> 
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