I use the switch on my bucking transformer for on/off and just leave the
radio "on", drops the input to 112 VAC
Renée
On 8/15/25 2:31 PM, David Wise wrote:
I preemptively fitted my machine with an inrush current limiter, and a snubber
across the switch contacts.
Dave Wise
On Aug 14, 2025, at 6:37 PM, Norman Ryan via R-390 <[email protected]>
wrote:
Hi, Adam,
If you can remove the power switch, you can revive it by taking it apart and
retrieving the two contacts. You may note the contacts are pitted and tend to
hitch onto one another, causing them to hang. Simply smooth them with a fine
toothed file and all will be well with the switch after assembly and
reinstallation.
Norman
Adam wrote:
I brought up my recently acquired R-390 slowly on a variac. No smoke, and
it picks up stations - not quite as good as my R390A, but thats to be
expected since its been asleep for 20 years.
Power switch doesn't turn off, I'll need to find one. Local Audio is
extremely quiet unless the BFO is turned on, then it's too loud (turned all
the way down and it's still booming). Line meter also doesn't function
unless the BFO is turned on. With my Kiwa MAP hooked to IF out, it sounds
decent.
Where should I start :D
Adam K2AAMl list: http://www.qsl.net/donate.html
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