[Amps] SB220 tune capacitor

[Joe Subich, W4TV]

 > Did the tune capacitor change during the life of the SB220 or
 > perhaps with similar amplifiers? SB200 HL220 etc.

Yes, later SB220 had a higher voltage breakdown (wider space,
more plates) capacitor that was longer.  It generally came with
a special end bracket for mounting the 10 meter coil.

73,

    ... Joe, W4TV

On 10/18/2010 10:07 PM, Martin Sole wrote:
> Perhaps a question for the Heathkit history buffs.
>
>
>
> Did the tune capacitor change during the life of the SB220 or perhaps with
> similar amplifiers? SB200 HL220 etc.
>
>
>
> I have received a replacement capacitor, well it's in UK awaiting onward
> shipment. From a picture of the actual part sent to me it appears to have
> two differences with the original part, these being that the ceramic
> insulators are mounted outboard of the aluminium end plates whereas on the
> original they are inboard and secondly that the number of fixed / moving
> vanes is 21/22 as opposed to 18/19 on the original part. I am awaiting
> confirmation of mounting hole spacing which might be the most significant
> issue, assuming the min C is not now too high.
>
>
>
> Any thoughts?
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>
>
> Thanks
>
> Martin, HS0ZED
>
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