[R-390] R389 and R390 faults

[Mark Huss]

First, you may want to reference the R-390A manual at 
http://www.hausernet.com/r390a/
It should have everything you need.  Pay particular attention to the 
Capacitor replacement listing.  AWlso, for some reason, 2.2K resistors 
in the R-390A's seem to change value considerably.  Otherwise, just 
watch the list.  Good Luck.

The counter knob on the BFO was added to R-390A's used for RTTY 
reception.  Makes tuning the BFO to FSK tones much easier. 

Rob Filby wrote:

>Hi.
>     I have recently bought an R389 and a pair of R390 rxs. They are all complete and in good condition.
>At first appearance it seems as the PSU, Audio stage and IF strip are interchangable. I have a few 
>questions which I would to ask the group and perhaps somebody could help me please.
>
>1.Were any parts listings produced for the above rxs, ie detailing the wattage of resistors and the voltage
>ratings of other components?
>
>2.Are there any common faults or other troublesome components that fail or give trouble that I need to be
>aware of?
>
>3. I have a couple of R390A rxs which have a mechanical counter for the BFO, why was this used over the 
>standard knob?
>
>Thanks for your help
>
>Rob.  
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