[time-nuts] z3816 what happened?

[paul swed]

Thats because everything is supr-dupr secret in them. I have a mighty
seriously dead z3801. I picked up for $ zip. Well fact is its still mighty
dead. :-)
I am generally pretty good at reverse engineering. But when it goes in the
micro or asics or fpga's. Life gets near impossible especially with out
anything but your eyeballs.
But my interest in the dead one was to explore. Have to say the dual ovens
well done but what an ungodly mess. The insulation stuff gets sticky like
tar after years.
The Z3801s issue was however in one of the ASICs. Such is life.
Yes you do need satstat at least or the z38xx program from germany. Its
free and at least would give you a clue.

If you are lucky the DAC is at the top or bottom of its range that happens.
You need to take the oven apart and adjust the course frequency.
Ugly issues
Taking the oven apart, ultimately putting it back together
Adjusting teh cap. Since it has not been moved in 20 years you can be sure
its going to go noisey on you.
Then you have to adjust to get the DAC back to mid range. Patience.

Regards
Paul
WB8TSL







On Tue, Nov 18, 2014 at 3:17 PM, Don Murray via time-nuts <
time-nuts at febo.com> wrote:

> Hi Paul...
>
> No...  As a matter of fact, it stoped working down if  Florida a few
> years back.  Went into the ALARM mode and that was  it!!  Had
> a HP Rb box, so didn't worry about it too much.
>
> Moved to Texas a few years ago...  Rb box on the shelf,  so decided
> to fire the 3816A up and see what would happen.  It had  been on the
> shelf for several years...
>
> So it came up and locked and we were good to go!!  But,  after a
> few weeks and the first practice FMT, the 3816A went back into  alarm.
>
> Had not been able to get the K8CU software going to talk to  the 3816A
> so don't know what the alarm is about.
>
> Have tried to recycle it again, but it comes up in the alarm  mode and
> that is where it sits.  Using it with the HP mushroom  antenna.
>
> That's my story, and no one seems to be working on these  guys...  ;-(
>
>
> 73
> Don
> W4WJ
>
>
>
> In a message dated 11/18/2014 12:29:07 P.M. Central Standard Time,
> paulswedb at gmail.com writes:
>
> Wonder  if the ole lightning gods visited since you are in 4  land.
> Regards
> Paul
> WB8TSL
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