[time-nuts] Lab upgrade

[Bob Camp]

Hi

Look for electrolytic / tantalum  capacitors on the 10V rail with scorch marks….

Bob

> On Jul 26, 2015, at 12:59 AM, Jason Ball <jason at ball.net> wrote:
> 
> Ok - not so bad.
> 
> One of the 250v 5Amp inside the case blew on the 10v line.   Now to work
> out why...
> 
> J.
> 
> 
> On Sun, Jul 26, 2015 at 1:05 PM, Jason Ball <jason at ball.net> wrote:
> 
>> 
>> Recently I've been on the hunt for test gear so facilitate moving up into
>> the microwave bands (ham radio), accurate timing being one of the basics to
>> be sorted.   As part of this I've recently acquired a HP 5335A with OCXO
>> and HP5350B microwave frequency counter, both picked up today.
>> 
>> I've setup a test stack using a stanford research function generator and
>> my existing HP 5384A counter to compare all the kit, it was nice to see
>> everything lock in within +5Hz @ 10MHz using only the internal reference.
>> I'll have a GPSDO running in a couple of days to provide an external
>> reference as well.
>> 
>> Unfortunately after running for 15 minutes the HP 5335A literally went
>> 'clunk' and now has no display which is disappointing as I wanted some of
>> the measurement functions this unit provides.   There's no odd small (for
>> an old system) so I'm hoping its a reasonably simple problem, I'll open the
>> case tonight.
>> 
>> Does anybody have any experience with issues on the HP 5335A's ?
>> 
>> Cheers
>> j.
>> 
>> 
>> --
>> --
>> Teach your kids Science, or somebody else will :/
>> 
>> jason at ball.net
>> vk2vjb at google.com <vk2flnx at google.com>
>> callsign: vk2vjb
>> 
>> 
> 
> 
> -- 
> --
> Teach your kids Science, or somebody else will :/
> 
> jason at ball.net
> vk2vjb at google.com <vk2flnx at google.com>
> callsign: vk2vjb
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