Greg,
?
Thanks for info.
Your statement on the Powerpoles for HT use is
amazing. Did you test the small Powerpoles (30-45 amp) or the larger 75 amp
models?
?
One thing is very important though; for HT
connectors, beside the HT rating, it is VERY important to have the connector
arranged in such a way that ground makes contact long before B+ in order to
prevent the RF deck to become on B+ potential any time. I cannot see a Powerpole
meeting this.
?
Also I use a second ground connection from the HT
psu to the RF deck. This ground connection is wired in the control cable
connector and provides the needed redundancy.
?
Cheers, Dick
PA3DUV
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----- Original Message -----
Sent: Sunday, September 24, 2006 2:42
AM
Subject: Re: Fw: [ham_amplifiers] Jumbo
sized lytic stack for HV supplies ! Oil
--- In ham_amplifiers@yahoogroups.com,
"Mike Sawyer" wrote:
>
> Let me correct
this:
>
>
>
> Jim said: This is my "external cap
box". I used Millen Red/ Black HV
> connector's on it. IF using the
Millen's.... either use
> nylon mounting screws or mount em on Micarta.
Both Kings and
> ROWE make better HV connector's imo.
>
>
Where can one find the Kings or Rowe connectors? The only thing I
have in
my junk box are the Millen Red and the brown phenolic. I
understand the
brown ones *aren't* very good. However, my local parts
jobber confided in
me that the Millen connectors were supposedly rated
for 4500 VDC.
>
Mod-U-Lator,
> Mike(y)
> W3SLK
>
Hi Mike
Lemo make
some very good HV connectors, but they expensive.
www.lemo.com
The look similar in construction to Canon
connectors however they use
high grade materials. The company that i work
for manufactures
industrial rf heaters and they have moved away from using
connectors
in all forms for HF and HV. Direct connections out in the field
has
proven the most reliable. M6 Studs are now routinely used for all
HV
and RF connections, all bolted with stainless hardware.
I have
had a lot of Luck using the HV PIGTAIL sets from Surplus
sales. I cant
think of the brand name, i think these are the same
brand that Rich
Measures has suggeted in the past. They might be Alden
i am not too
sure.
Having access to a 50KV AC DC Lab grade highpot its amazing
what
materials will withstand even if they not high voltage
rated.
Personally i would not be to fussed about using a homebrew
connector.
I have been Anderson Powerpoles mounted in Wine Barrels
Bungs. The
wine barrel bungs are the best grade silicon rubber you can buy.
You
can turn these down and mount the male/female andersons in them.
I
could not make these flash over at 30 KV @ 1amp! I did not
pursue
testing over 30kv because tracking and leaking can confuse
the
measurments, i would say its safe even for tube with handle
amplifers.
High grade silicon rubber wire rated at 30kv was used for
these
connectors. I routinely pull these live from a 7kv power
supply,
however i always play it safe and use electricians 45 kv live
line
working gloves. I dont want to be a victim of
Murphy!
Greg
