[Collins] 32S-3 caps C72, C76

[Carl]

In that case the usual suspects carry doorknob caps but primarily in 5KV and 
up physical size. Use whatever is the easiest as operationally there is no 
difference at that power level between styles.

Carl
KM1H




----- Original Message ----- 
From: "Dr. Gerald N. Johnson" <geraldj at weather.net>
To: <collins at mailman.qth.net>
Sent: Friday, May 04, 2012 10:25 AM
Subject: Re: [Collins] 32S-3 caps C72, C76


> My most rtecent manual shows those capacitors are part number
> 858W5T2KV1KPFPORM20PCT 1nf, 2 kv, 20% CPN 913-4803-000 made by v72982,
> looks like Centralab. A transmitting capacitor 13/16" diameter 5/8"
> long, with 6-32 threaded posts. Hi-K dielectric according to the 1960
> Radio Electronic Master. Centralab catalog 101 shows X5U maximum C at
> room temp, down 20% at -25C and +50C. Probably like (CFC) HT581000-75 at
> Surplus Sales or RF Parts. A disk ceramic may function electrically but
> loses the mechanical support of the Centralab 858 capacitor.
>
> HP says federal manufacturing code 72982 is Erie. And my 1960 Master
> doesn't show any erie transmitting capacitors.
>
> 73, Jerry, K0CQ, Technical adviser to the Collins Radio Association
>
> On 5/4/2012 8:01 AM, Carl wrote:
>> Generic Hi-K of the 50's which was long before todays definitions were
>> developed.
>>
>> Any 1000pf/6KV disc will be fine.
>>
>> Carl
>> KM1H
>>
>>
>> ----- Original Message -----
>> From: "Bob and Sue Jefferis"<ljranch2010-ham at yahoo.com>
>> To:<collins at mailman.qth.net>
>> Sent: Thursday, May 03, 2012 9:57 PM
>> Subject: [Collins] 32S-3 caps C72, C76
>>
>>
>>> Greetings all,
>>>
>>> I have been looking for definitive specifications of the "Hi-Q" brand
>>> ceramic disk caps used in the 32S-3 for C72 and C76. The KWM-2 used the
>>> same caps in the PA area, e.g. , C149. These are 1000 pf 2 kV ceramics. 
>>> I
>>> have not found a Federal Stock Number for these guys either. Before
>>> attempting to order replacements  I would really like to know what the
>>> original dielectric characteristic was. Any insight?
>>>
>>> 73, Bob. KF6BC
>>>
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