[Milsurplus] Milsurplus Digest, Vol 247, Issue 35

Sun Nov 17 00:37:53 EST 2024

While working at Cardiac Resuscitator around 1983 I was defibrillated. Unconscious and paralyzed. I gained a new respect for electrons with a lot of motivation.  EMF.

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From: milsurplus-bounces at mailman.qth.net <milsurplus-bounces at mailman.qth.net> on behalf of milsurplus-request at mailman.qth.net <milsurplus-request at mailman.qth.net>
Sent: Saturday, November 16, 2024 6:22 PM
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Subject: Milsurplus Digest, Vol 247, Issue 35

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Today's Topics:

   1. Re: Millen HV Connector Strain Relief (Mike Feher)

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Message: 1
Date: Sat, 16 Nov 2024 21:21:53 -0500
From: "Mike Feher" <n4fs at eozinc.com>
To: "'Mark K3MSB'" <mark.k3msb at gmail.com>,      "'Military Radio Collectors
        Association'" <mrca at mailman.qth.net>,   "'List Milsurplus'"
        <milsurplus at mailman.qth.net>,   "'ARC5'" <arc5 at mailman.qth.net>
Subject: Re: [Milsurplus] Millen HV Connector Strain Relief
Message-ID: <[email protected]>
Content-Type: text/plain; charset="utf-8"

Just a word of caution from experience. Back around 1970 I had a KW amp with a separate PS. I believe it used a pair of 4-400s. In order to go from class C to linear, the drive had to be changed from one connector to another and they were SO-239s on the amp. They were spaced about one inch from the Millen HV connector. So, one morning before work, I decided to go from one mode to the other, without switching off the HV. Done it before several times with no problem. I unscrewed the PL-259 that was 2 inches from the HV connector and as I was putting it on the SO-239 one inch away from the HV, one of my fingers holding on to the PL-259 touched the Millen HV connector. The whole connector literally blew up. Thankfully my other hand was not touching anything. So, there is smoke and a lot of strong smell of burnt flesh. I was knocked on my ass. As I managed to get up and walk around in a daze holding up my hand still smoking, my wife at the time comes into the radio room and asked
 if I got a shock. A couple of weeks later I was working on a low voltage solid state PS and something fell on the large filter cap that sounded like a gun going off. I almost had a heart attack and looked behind me to see if the HV supply was still on the floor or came after me, HI. True story. Be careful. 73 ? Mike

Mike B. Feher, N4FS

89 Arnold Blvd.

Howell NJ 07731

908-902-3831

From: milsurplus-bounces at mailman.qth.net <milsurplus-bounces at mailman.qth.net> On Behalf Of Mark K3MSB
Sent: Saturday, November 16, 2024 12:44 PM
To: Military Radio Collectors Association (mrca at mailman.qth.net) <mrca at mailman.qth.net>; List Milsurplus <milsurplus at mailman.qth.net>; ARC5 <arc5 at mailman.qth.net>
Subject: [Milsurplus] Millen HV Connector Strain Relief

I am running cables for the 2KV and 500V TBW Power Supplies and I was looking for a way to provide a strain relief for a Millen HV connector with parts on hand.

I found using the soft outer plastic shell from an old microphone connector works great. The electrical tape securely holds the shell to the HV connector while allowing the shell / connector to rotate freely around the HV cable.

73 Mark K3MSB

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