I know. One thing I've done is included two ground conductors in the control cable that
goes to the amplifier. So if someone were to disconnect the HV cable while the supply was
energized, it would still be grounded (the supply can't turn on if the control cable is
disconnected). I agree about the exposed pin.
I thought a lot about using a separate power supply. I would much have preferred a single
unit, but it would have been too big and heavy for a tabletop and I don't have room for a
floor-standing unit.
On 10/27/2013 8:20 PM, Al Kozakiewicz wrote:
Just FYI, from Wikipedia:
MHV connectors are presently considered by some as a safety hazard because of
the
possibility of high voltage on the exposed central pin when not plugged in,[1]
and
because the ground connection is broken before the power connection when
demating. SHV
connectors are designed to prevent these hazards, and cannot be mated to BNC
connectors.
Always have liked the idea of separate power supplies but have always worried
about the
safety of interconnects. The one other person I know who did this did not use
any
connectors for the HV. Accomplished the goal decoupling the supply from the
amp, but
requires tools and time to move either chassis more than the length of the
umbilical
away from each other.
Al AB2ZY
-----Original Message----- From: Amps [mailto:amps-bounces@contesting.com] On
Behalf Of
Vic K2VCO Sent: Sunday, October 27, 2013 11:03 PM To: Amps reflector Subject:
[Amps]
4CX1000A project
I've added a few more photos to my 4CX1000A amplifier page at
<http://www.qsl.net/k2vco/4CX1000A/K2VCO%204CX1000A%20Amplifier.html>
I finished the wiring as well as testing and adjusting the Tetrode Boards, which
include the screen and bias regulators and trip circuits, the warmup timer,
etc. I have
not yet applied HV, which I intend to do when I'm fresh, and after I've cooked
the tube
with heater voltage only for a while.
I'm working on adding fans to a '1000 watt' Drake dummy load to use for testing.
-- Vic, K2VCO Fresno CA http://www.qsl.net/k2vco/
--
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco/
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