On 4/13/2011 12:39 AM, Glen Zook wrote:
> The 200, 201, 220, or 221. All are very good Heathkit amplifiers.
>
> Don't even think of an SB-230 unless you are willing to change out the 8873
> conduction cooled tube which hasn't been made for decades with one of the
> Russian triodes. You can buy a couple, or more, amplifiers for what the 8873
> tubes are "going for" these days.
The 8874s are bad enough and they are still made.
It should be possible to take parts from the 8873 and combined with a
GI-7B (and some machining skills) remembering that dust from Beryllium
dioxide is poisonous, to adapt the tube to work. This would not be a
job for a beginner of the mechanically challenged. <:-)) Having a lathe
and milling machine would be a help too, so we've narrowed the number of
people who could do this substantially to a very small number.
I've seen some nice 8874 conversions, but that too is not practical for
most individuals.
73
Roger (K8RI)
> Glen, K9STH
>
> Website: http://k9sth.com
>
>
> --- On Tue, 4/12/11, Mike Lyon<mike.lyon@gmail.com> wrote:
>
> Looking to buy a heathkit amp. Looking at the sb-220, sb-221 and the sb230.
> Amp will mostly be used for 40 and 80. Which do people recommend?
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