Jerry,
While this isn't the sure fire problem, I would first guess dirty meter
switch contacts.
Buy some non-lubricating contact and switch cleaner from Home "Despot" in
the electrical department, slide the unit out of the cabinet, gain access to
the meter switch back and spray on the switch wafer while rocking it back
and forth.
Don't let the stuff run all over the other components, set the chassis up so
the contaminants run down and right out of the chassis... Set radio on
several shop towels
We'd see this kind of behavior back when I worked at the Collins dealer in
the 70's. Then it was usually caused by heavy smoking, these days most
likely heavy dirt/dust accumulation. At least a grid meter switch is pretty
simple to get at.
HAVE FUN
BOB DD
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
Behalf Of jsternmd
Sent: Monday, November 27, 2006 4:16 PM
To: amps@contesting.com
Subject: [Amps] Collins 30L-1 Bouncy Meter
I have a 30L-1 with a real "bouncy" meter. When switching from DC volts
(~1900V) to either Tune or DC Amps, the meter swings down to about minus
400-600v before coming back to rest at Zero. Also, when first powering on,
it overshoots and pins the DC Volt scale. Checking the same action on my
other 30L-1 shows that there is no overswing to negative numbers when
switching deom DC Volts to Tune or DC Amps and it goes quickly and smoothly
from 1900 to zero. Is the wide swing indicative of a bad meter?
Jerry
K1JOS
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