Hi Mal,
The SB-221 was a latter-day version of the SB-220 (I think the only
significant difference was that 10m was hard to enable, following the FCC's
anti-CB ploy).
Search for SB-220 instead. You should drown. It was a very popular amp.
http://www.somis.org/
for a start is Rich Measures' page - he wrote a series of articles in QST
about the 220 some time ago, which as I remember started a furore with
disputations from many major amplifier designers of note, but at least it's
a start.
Cheers,
Steve
01/16/04 17:21:10, "hamilton mal" <[email protected]> wrote:
Hi All
Does anyone have info about the HEATHKIT AMP SB221. Cover 80 - 10
metres.
Mods for 160 m, cct details etc
I have tried the internet but cannot get a hit on this amp.
73 de Mal/G3KEV
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