[AMRadio] UG 634U

david knepper collinsradio at adelphia.net
Sun Jan 29 21:14:48 EST 2006

Mike, this is the most definitive explanation that I have received.  I am 
sure that other will agree with you and so I am posting your post to the 
entire group.  I never thought that the mica connector was for RF.  It was 
this type that broke down in every instance with about 2,000 volts or more 
when modulation voltage was applied.


Dave, W3ST
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----- Original Message ----- 
From: "Mike Dorworth, K4XM" <k4xm at arczip.com>
To: "Discussion of AM Radio" <amradio at mailman.qth.net>
Sent: Sunday, January 29, 2006 8:56 PM
Subject: Re: [AMRadio] UG 634U

>I have a Millen ad in a 1963 CQ Magazine that says the Red and Black Millen
> connectors are for HV and the Brown (yellow) is a special filled bakelite
> for RF use ONLY! My friend says the Reds are the best since the Black are
> pigmented with carbon to give the black color. Sounds right. Mounted on a
> plastic disk they do count as pretty good. Metal screws are asking for
> trouble. Nylon handy for this.  73 Mike.
> ----- Original Message -----
> From: "Mike Sawyer" <w3slk at uplink.net>
> To: "Discussion of AM Radio" <amradio at mailman.qth.net>
> Sent: Sunday, January 29, 2006 6:11 PM
> Subject: Re: [AMRadio] UG 634U
>> Unfortunately Ed these are the 'Millen' connectors are only good to about
>> 2KV. I know the spec say more but this was discussed at length on the 
>> reflector. I have a bunch of the brown ones where the flanges apparently
>> broke down under HV stress. I couldn't prove it but the insides of the
>> material looked to have been molten.
>> Mod-U-Lator,
>> Mike(y)
>> W3SLK
>> ----- Original Message -----
>> From: "Edward B Richards" <zuu6k at juno.com>
>> To: <amradio at mailman.qth.net>
>> Sent: Sunday, January 29, 2006 5:47 PM
>> Subject: Re: [AMRadio] UG 634U
>> I got my high voltage connectors from RF PARTS    rip at rfparts.com
>> part # 37001 (A,B,C,D) rated for 7000 VDC @ 2 amps. Chassis mount flang
>> $6.90, cable mount shell $5.90. Good luck.
>> 73, Ed Richards K6UUZ
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