You are most fortunate Hardy. In addition to having the Millen connectors
breakdown and turn into a resistor over time (at 4kv/8877), I was very
nearly turned into an SK when the B+ wire broke off of one of them just as my
left hand brushed the wire. I was out of commission for about ten weeks and
have some nasty scars on that hand to commemorate the occasion.
The wire that broke was some fancy neoprene covered hv cable. The
insulation was wonderful but the center conductor was almost as robust as
cheese. A
few wiggles after soldering and the conductor would simply snap off the
connector.
If the EPA ever gets wind of the potential for danger, the Millen hv
connectors will become extinct and in my opinion deserved.
I can't see a banana plug arrangement being any safer unless there is some
type of locking device to prevent accidentally unplugging the cable. I have
seen some twist on connectors in the Mouser catalog that are interesting a
maybe up to the job. The SHV connectors are certainly up to the task as
well.
73,
Gerald K5GW
In a message dated 1/13/2010 12:12:43 A.M. Central Standard Time,
n7rt@cox.net writes:
Hi All
I have used those Millen connectors for years and never had a problem. Up
to
4600 VDC.
I am surprised at the complaints.....
73 Hardy N7RT
----- Original Message -----
From: "RICHARD SOLOMON" <w1ksz@q.com>
To: "Amplifier Reflector" <amps@contesting.com>
Sent: Tuesday, January 12, 2010 10:03 PM
Subject: Re: [Amps] which HV connector to use?
>
> That's interesting ... when I used them in the 60's they were rated for
10
> KVDC, and
> that was the mated spec. Perhaps the 5 KV rating is for an unmated
> connector, or
> maybe it's due to global warming ??
>
> 73, Dick, W1KSZ
>
> Date: Tue, 12 Jan 2010 20:56:04 -0800
> Subject: Re: [Amps] which HV connector to use?
> From: jimw7ry@gmail.com
> To: w1ksz@q.com
> CC: amps@contesting.com
>
> MHV is what I'm using on my new 8877. They are rated for 5KV. They're a
> little expensive but keep your eye on EBay for them.
>
> 73
> Jim W7RY
>
>
>
>
> On Tue, Jan 12, 2010 at 8:37 PM, RICHARD SOLOMON <w1ksz@q.com> wrote:
>
>
> You can use the MHV type coax connector. Looks like a BNC on steroids.
> I used them to power an IR Image Converter that required 8 kVDC many
>
> moons ago.
>
> 73, Dick, W1KSZ
>
>> Date: Tue, 12 Jan 2010 20:17:40 -0800
>> From: audioguy@charter.net
>> CC: Amps@contesting.com
>
>> Subject: Re: [Amps] which HV connector to use?
>>
>> Assuming one doesn't insist on using the Millen connectors, what's a
>> good alternative?
>>
>> Someone mentioned RG-214 a few pages back but having been there, done
>
>> that and arced most of the common connectors I'm not thrilled with that
>> one either.
>>
>> Perhaps the moral is to always build integrated. (and buy bigger
>> desks...)
>>
>> 73,
>> Jim, N7CXI
>
>>
>> Phil Clements wrote:
>> >
>> >
>> >> The Millen has a known history of flashing to a metal mounting at
5Kv
>> >> once
>> >> they have absorbed sufficient moisture even in clean holes. I quit
>> >> selling
>
>> >> them due to failures and complaints.
>> >>
>> >> Carl
>> >> KM1H
>> >
>> > Amen, Carl. If one insists upon using the Millen red and blacks, I
>> > suggest
>> > my method of punching a one and 1/4 inch round hole in the chassis,
>> > mounting
>
>> > a 2 X 2 X 1/2 inch piece of Plexiglas behind the hole, and installing
>> > the
>> > connector in the center of the round hole backed up by the Plexiglas.
I
>> > have
>> > used this successfully on 6 KV supplies with no problems. I would
never
>> > use
>
>> > the Millen connectors without the plastic backing at voltages over 3
>> > KV.
>> > There is a yellow Millen connector that absorbs moisture worse than
the
>> > red
>> > and black!
>> >
>> > (((73)))
>
>> > Phil, K5PC
>> >
>> >
>> >
>> > _______________________________________________
>> > Amps mailing list
>> > Amps@contesting.com
>
>> > http://lists.contesting.com/mailman/listinfo/amps
>> >
>> _______________________________________________
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>
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>
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