I see no reason to go higher voltage in that amp. Similar B+ level products
have been using the standard 5KV ceramic doorknob for many decades. The
antenna safety chokes are there for a reason and if there is an antenna
fault while transmitting saving the 8874's will be your major
concern....always monitor the grid current.
With Russian caps you first need to have the room which is already cramped,
and metric brass or screws and washers....you arent going to use steel or
stainless are you?
Carl
KM1H
----- Original Message -----
From: "Robert Harmon" <k6uj@pacbell.net>
To: <dezrat1242@yahoo.com>
Cc: <amps@contesting.com>
Sent: Tuesday, March 15, 2011 2:47 PM
Subject: Re: [Amps] doorknob cap suppliers ?
>
> I see your point. I'll see if I can find higher voltage caps
> that will fit O.K.
> I have been looking at the Russian caps on ebay,
> good prices.
>
> thanks Bill,
>
> Bob
> K6UJ
>
>
>
>
> On Mar 14, 2011, at 10:51 AM, Bill, W6WRT wrote:
>
>> ORIGINAL MESSAGE:
>>
>> On Sun, 13 Mar 2011 12:00:53 -0700, Robert Harmon <k6uj@pacbell.net>
>> wrote:
>>
>>> Yes that is what is in there, two 2000pf 6kv discs in parallel.
>>> I'm going through and upgrading caps in the amp,
>>
>> REPLY:
>>
>> For what it's worth - IMO, 6kV is a little bit marginal. If you ever
>> have an antenna fault while transmitting (broken wire, shorted coax,
>> whatever) the voltage across the cap can easily exceed 6kV. As long as
>> you're upgrading, why not put in a 12 or 15 kV cap? The cost is only a
>> little more and the peace of mind is priceless.
>>
>> I recommend the Russian doorknobs on eBay. Good stuff.
>>
>> 73, Bill W6WRT
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>
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