[Amps] SB-220 unbuilt

[Gary Smith]

As regards the T/R mod on the 220; I used the mod Rich Measures 
suggests and did it his way. That was about as sweet of a QSK as I've 
ever seen. Just flawless. All of the mods he suggested I do worked 
well.

Gary
ka1j

> If you've always wanted to build your own kW amplifier, but don't have
> the gumption or parts to do it from scratch, there is a new-old-stock
> Heathkit SB220, never built, on epay. The're asking $1500, which might
> actually be worth it for someone in this situation. Getting a used
> -220 runs for $300-500 typically. As most know, it was a compact dual
> 3-500Z amplifier that is commonly modified, or used stock. A couple of
> things should be done such as improving the input tuning networks, and
> putting step start on the primary, at a minimum. Less critical but
> useful improvements include better T/R relay switching, better
> bleeder/equalizing resistors, etc. All this could be done during the
> kit build to save a lot of rework. I have no vested interest in this
> item, just passing along the info.
> 
> Item# 120189016945	
> 
> 73
> John K5PRO
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