> 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?
>
>
>
>
>
> Thanks
>
> Martin, HS0ZED
>
>
>
>
>
>
>
>
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|