[time-nuts] Z3801A trouble

[Erno Peres]

it could be also that the pover supply drops the voltage under nominal load... looks Ok with no load....



-----Original Message-----
From: J. L. Trantham <jltran at att.net>
To: 'Discussion of precise time and frequency measurement' <time-nuts at febo.com>
Sent: Sun, Jan 13, 2013 1:50 pm
Subject: Re: [time-nuts] Z3801A trouble


I believe it was Murphy.........
Joe
-----Original Message-----
rom: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
ehalf Of Joseph Gray
ent: Sunday, January 13, 2013 2:14 AM
o: Discussion of precise time and frequency measurement
ubject: Re: [time-nuts] Z3801A trouble

y first suspect was the power supply, as you guys suggested. Although the
ower supply read OK with no load, I dug around in my junk and found another
upply to replace it with. I just swapped it out and no more rebooting. Now
 have to wait until I get GPS lock and the thing stabilizes again.
The failure was at an inconvenient time, as I was using the GPSDO to adjust
n OXCO that I am going to put into a project. I've had the OCXO on my
able, cooking for weeks.
Joe Gray
5JG

n Sat, Jan 12, 2013 at 10:40 PM, bownes <bownes at gmail.com> wrote:
 That is exactly what mine does when it has marginal power on the 48v 
 input. You may find that 50-52vdc works.

 On Jan 13, 2013, at 0:14, Joseph Gray <jgray at zianet.com> wrote:

> After many years of faithful service, my Z3801A has stopped working. 
> It seems to be going through a loop at powerup. All of the LEDs blink 
> at once, then they blink in order, left to right. After several 
> seconds, this is repeated. I'll have to clear the bench of the 
> project I was working on so I can take the Z3801A apart.
>
> Joe Gray
> W5JG
>
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