[Premium-Rx] Racal RA6790/GM issue

[mikea]

On Sat, Oct 01, 2005 at 03:01:57PM -0700, mcolby at mcolby.com wrote:
> Greetings to all (esp. you Racal jockeys),
> 
> I'm seeking suggestions/inputs/etc. for a recent issue that's cropped up
> on my RA6790/GM
> 
> These days when powering it up, I get a frequency display of all zeros,
> with very little displayed on either right hand or left hand displays
> (I think the filter bandwidth shows zeros too).
> 
> When this occurs, the machine is dead, no tuning possible, no self-check
> possible, and no sound.
> 
> After a few minutes, it seems to return to normal.
> 
> I don't think it's a battery issue; I replaced the onboard battery a
> couple of years ago with two n-cell nicads in a separate battery holder
> back where the ISB board is located when it's fitted. (Both cells check
> out to be ~ 1.3 volts). Problem occurs both when batteries are fitted
> and when they are not.

Measure PS rail voltages when it fails and when it's working OK. I'll 
not be surprised if there's a difference. 

Of course, if you can't get it working, I'll take the useless junk off
your hands for the cost of shipping. ;=)

-- 
Mike Andrews, W5EGO
mikea at mikea.ath.cx
Tired old sysadmin