A little vacuum relay to take the HV isn't hard to do.
A little 24V dcplug pack (wall wart) supply would be easy to cannibalise
and fit inside the cabinet to operate the relay. (Ebay item 310743446311)
You could probably clean your existing switch and still use it to switch
the dc volts to the relay.
73, Alek
VK6APK
On 12/09/2013 10:21 PM, Larry wrote:
I looked at the switch this morning in the amp (it's at the top of the
front panel). With a mirror I spotted on the bottom side of the switch
where it arced from some part of the switch contact to the switch
shaft. The arc point is not visible from the top of the switch. The
switch still rotates but I suspect the contact is so lose to the shaft
that it just arcs with power. I won't know more until I take the
switch out. I am not sure I will ever know why all of a sudden it
arced over but at least I know what it is. There are no wires in the
area.
I suspect the switch is a lost cause. Finding a new one should be
interesting. A number of responses would suggest just bypassing the
switch and just connect the SSB lead and just tie off the CW tap wire
which could at least be an interim solution if not permanent.
I hope the switch is the only problem.
Thanks to all who took time to respond.
73, Larry W6NWS
-----Original Message----- From: Ron Youvan
Sent: Thursday, September 12, 2013 9:30 AM
To: amps@contesting.com
Subject: Re: [Amps] Clipperton-L question
On 09/11/2013 02:58 PM, Carl wrote:
Id check the SSB/CW switch carefully for arcing to a metal part. Common
problem with an underrated switch.
"Larry" <lknain@nc.rr.com> wrote:
One day when I switched from CW to SSB mode on my Clipperton-L it blew
the fuse with a good bang. The switch picks between a tap and one side
of the power transformer secondary – tap being for CW.
I would take the switch out and put a "wire nut" on one transformer
connection sealing it off and make the other connection with another
"wire nut" and test. Then I would switch to the other transformer
connection and test, if both work the switch is arcing.
--
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