I stand to be corrected, I never measured them. Now that I think about it I do
recall some being a little longer in length but I did not think it was because
they increased the plate spacing. I apologize. Louie
From: Will Matney <email@example.com>
Sent: Sat, 3 Jun 2006 21:57:20 -0400
Subject: Re: [Amps] SB-220 Plate Tuning Capacitor
You gave very good info by reposting the old article with the part numbers. An
OEP number is an Oren Elliott part number (OEP 26-164) which can be had by
contacting them. They can reproduce this part or recommend a stock replacement.
They will sell single parts.
*********** REPLY SEPARATOR ***********
On 6/3/06 at 11:55 PM W2RU - Bud Hippisley wrote:
>> The very late SB-220s and HL-2200s had longer tune caps. Or Heathkit
>> made them available on a replacement basis. I have seen several SB-220s
>> with them.
>> OF THE DOZENS I HAVE SEEN INCLUDING HL-2200'S THIS WAS NOT THE CASE
>> ALTHOUGH I NEVER TOOK MEASUREMENTS MY FEELING IS THEY WERE ALL THE SAME.
>In late 1987 or early 1988, after some months of frequent arcing at my
>SB-220 plate tuning capacitor (stock P/N 26-131), I ordered a
>replacement from Heath. In return I received P/N 26-164 and a service
>bulletin page from Heath Zenith that stated, in part:
>"A new tuning capacitor, Part # 26-164, is being supplied in place of
>part #26-131 that you ordered. The new tuning capacitor is about 1-1/2"
>longer than the older one, so it is necessary to install a spacer at
>"DA" to permit proper mounting at the plate coil...."
>I installed this capacitor on February 7, 1988.
>A Google search on "Heath SB-220 26-164" (without the quotation marks)
>led me to the following from a July 1997 posting by KM1H to the Amps
>"9. Most SB-220's and early 221's will have the small Johnson 154-9 Tune
>cap or the OEP 26-131. This cap is prone to arcing since it is only
>.075"/3KV spacing. Later amps and Heath replacements were the OEP 26-164
>which is about .090/3500V spacing. It will still arc on occasion when the
>amp is mistuned but not melt down as did the original. There is no
>Johnson/Cardwell equivalent. If there is enough interest I will have the
>I hope the above is adequate documentation of the facts concerning the
>SB-220 Tune capacitor.
>Amps mailing list
Amps mailing list
Amps mailing list