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Re: LF: teflon capacitors

from [gw8glo] [Permanent Link][Original]
To: [email protected]
Subject: Re: LF: teflon capacitors
From: [email protected]
Date: Thu, 11 Aug 2016 11:34:39 -0400
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OK Andy they are the normal doorknob types, the ones I am looking at are made of a white ceramic case and are nitrogen filled with bolts at either end. There are 2 types available in 2000pf 2kv and 16kv. They are about 100mm long. They are available via ebay.
73 Dave



-----Original Message-----
From: F6CNI - Andy - JN19QB <[email protected]>
To: rsgb_lf_group <[email protected]>
Sent: Thu, 11 Aug 2016 11:06
Subject: LF: teflon capacitors

Hello Dave, for info :
 
I did not tried the teflon models, but in the years 2002 I had an home made ampli on 2200m band, with 2 x 3-500Z tubes, also 800 W output.
 
I used Russian doorknob capacitors types K15U-2 and KVI-3 without any problem. They are still avaible on the UR4LL surplus parts site http://www.ur4ll.net/
 
Andy.
 
Sent: Thursday, August 11, 2016 9:39 AM
Subject: LF: teflon capacitors
 
Has anybody tried using the Russian teflon doorknob capacitors for tuned circuits on 137 khz? I have seen some rated at 2000pf at 16kv which will give me the 8000pf I require to tune the loop. So far most caps get hot or self destruct when getting to 1kw, only 2/3 power. Current at 800 w is about 20 amps. Thanks Dave
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