Thanks Joe,
I might be looking for the special end plate then, or at least some pictures
to see if I can fabricate one.
73
Martin, HS00ZED
-----Original Message-----
From: Joe Subich, W4TV [mailto:lists@subich.com]
Sent: 19 October 2010 09:22
To: amps@contesting.com; hs0zed@csloxinfo.com >> Martin Sole
Subject: Re: [Amps] SB220 tune capacitor
> 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
>
>
>
>
>
>
>
>
>
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>
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