[Johnson] Ranger 1 Question/Problem

[C Eus]

Put that screwdriver away from the VFO!!!!

Check that VFO potentiometer on the time sequence
keyer and look for the potentiometer on that aluminum
sheet. Follow the directions on the manual regarding
this and I believe your "motorboating" problems will
go away. 
Cal. 
--- "Bruce J. Howes" <bhowes at suscom-maine.net> wrote:
> Hi guys (and gals),
>  
> My Ranger 1 seems to have developed a odd problem.
>  
> I was using it yesterday and all seemed fine until
> about 1/2 hour into
> operation.
>  
> After about 1/2 hour I noted a "motor boating" sound
> in the receiver when
> the transmitter was not keyed.
> This would start out slow and then speed up until it
> covered up the stations
> I was listening to on the receiver.
>  
> If I would key the transmitter then noise would stop
> briefly, then return in
> 30 seconds to to 1 minute.
> This only happens when the VFO is selected, if I use
> a xtal setting, xtal in
> the socket, no noise is noted.
> I suspect that a component in the VFO is heating up
> and failing, perhaps a
> capacitor allowing interstage leakage.
>  
> My question is if anyone has run across this before,
> and if so what
> component failed?
> Due to the tight conditions of the Johnson VFO, I
> would like to minimize the
> surgery needed to diagnose and correct the fault.
> Also the rather delayed nature of the problem makes
> it somewhat difficult to
> repeat on the bench.
>  
> The key thing here is that it only seems to happen
> with the VFO on, not in
> the xtal position, so it does seem to be a VFO
> fault.
> Your ideas, thoughts and suggestions?
>  
> Thanks!
>  
> 73 Bruce W1UJR
> Johnson mailing list
> Home:
> http://mailman.qth.net/mailman/listinfo/johnson
> Help: http://mailman.qth.net/mmfaq.html
> Post: mailto:Johnson at mailman.qth.net
> 


		
__________________________________ 
Do you Yahoo!? 
Yahoo! Personals - Better first dates. More second dates. 
http://personals.yahoo.com