[Lowfer] O-scope Bad

Sat, 10 Jan 2004 22:30:24 -0500

If this thing has been setting around for a while it probably has a lot
of
problems in the switched contacts. Find some good switch cleaner/lub and
open er up and spray it down ,,, allowing it to dry before turning on

Nother point but a late one

For something that has not been turned on for a long time ( if that was
the case ? ) 
good idea to put it on a Variack and slowly raise the input voltage ( 120
VAC )
do this over several hours if you arent going to monitor the current
drawn. What you 
are doing is reforming the Electrolytic caps ,, if needed ,, to keep them
from losing all their smoke
or going bad in other ways

Bob  K3DJC 

On Sat, 10 Jan 2004 16:14:24 -0800 "KD7JYK"
<[email protected]> writes:
> OK, now you need to find the up/down control.  Sounds more and more 
> like it
> is off screen.  It is possible, if the front controls don't change 
> anything
> you may need to find in internal deviation control potentiometer to 
> bring it
> back within the front panel control range, someone might have 
> tweaked it.
> You need to dig up a manual.  One thing you can try is give it a 
> signal,
> connecting the audio output of a pocket radio is good, and turn up 
> the
> volume slowly and see if the trace appears, or at least a few peaks, 
> this
> can give you an idea of where the trace ran off to!
> 
> Kurt
> 
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