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Re: [Amps] door knob capacitors needed

To: Rob Atkinson <>
Subject: Re: [Amps] door knob capacitors needed
From: Alek Petkovic <>
Date: Tue, 25 Dec 2018 08:06:57 +0800
List-post: <>
Despite the lack of published English data on the Russki caps, Dr Alex, UR4LL is pretty good in steering you towards the correct capacitor for your intended application. He is very approachable and as honest as the day is long.

He also offers the capacitors at very reasonable prices. The proceeds go towards his assisting local hospital/s.


73, Alek. VK6APK

On 20/12/2018 9:54 PM, Rob Atkinson wrote:
Two points about the Russian doorknobs:  1.  My expereince has been
that the threaded ends twist off easily.  Be careful and don't
over-tighten.  2.  They are metric so brass screws from Ace Hardware
won't work.  MacMaster-Carr has metric brass fasteners.

Agree with Carl about the data or lack of it.  For this reason I use
them in non-critical places such as feedline matching networks.  In a
transmitter that's a PITA to get into and repair, I go with HECs
because I can select the right cap for the job based on current and v.
data for 1000 kc.

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