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Re: [TenTec] Doorknobs needed - Was: Ig drift on amps

To: <Gary@doctorgary.net>, "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Subject: Re: [TenTec] Doorknobs needed - Was: Ig drift on amps
From: "Bob McGraw - K4TAX" <RMcGraw@Blomand.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Mon, 9 Feb 2009 21:52:22 -0600
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
Surplus Sales of Nebraska has some of them.
Fair Radio Sales has some of them.

Check E-Bay for some of them.

73
Bob, K4TAX

----- Original Message ----- 
From: "Gary Smith" <Gary@doctorgary.net>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Monday, February 09, 2009 7:29 PM
Subject: [TenTec] Doorknobs needed - Was: Ig drift on amps


> It appears I likely need to replace at least some of the padding 
> capacitors in the tank on my 425 to stop the Ig drift on the lower 
> bands. To do a clean sweep, what I need to replace are the following.
> 
> A. (C6, C7) Two 1000pf @ 5KV series 858s doorknobs
> 
> B. (C17)     One 500pf @ 5KV series 858s doorknob
> 
> C. (C18, C20) Two 300pf @ 5KV series 858s doorknobs
> 
> D. (C15)     One 400pf @ 15K Series HEC HT57 doorknob
> 
> E. ( C16) One 270pf @ 2KV disc: Ceramic?/Mica? which is about 
> 1"x3/32" and is glossy yellow. On the side it reads:
> 
> RMC   270    J
> 2KV    P     3
> 
> 
> I would like to change "E" to an 858 series doorknob, making it a 
> 270pf @ 5KV series 858 doorknob.
> 
> The Drifting Ig issue is really a problem on the low bands and I'm 
> concerned about damaging the tubes. If you have any of these caps in 
> as new condition available, please contact me off list.
> 
> Thanks!
> 
> Gary
> KA1J
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> TenTec mailing list
> TenTec@contesting.com
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>

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