[time-nuts] 5370A

[Bob kb8tq]

Hi

The gotcha with pretty much all HP counters is that the front end
chips are non-standard. In some cases they are part of a multi chip
module that is non-standard. 

Option one is to find a parts donor on eBay and transplant the front
panel of your 5370, 5334, 5335, 53131,53230 …. and fix it that way. 

Option two is to build up something that isn’t quite the same and 
see if you can cram it in the space available. I seem to recall this
working better on the 5370 than on the 5335. 

Back when you *could* get service on them (like the 1980’s), a blown 
channel on a 5335 was a $1150 repair bill. They replaced the entire front 
panel PCB. Even HP service could not get “that chip” to simply replace
the blown input device. 

Bob

> On Feb 10, 2021, at 7:27 AM, Herbert Diensthuber <kern1578 at hotmail.com> wrote:
> 
> Hi all
> Sorry to say but I just managed to damage one of the input channels of my trusted HP 5370A.
> If someone could get me pointed in the right direction where to get or purchase the input IC amplifier I would very much appreciate it.
> Comments or replies please send them to my email!
> Thank you very much 
> Herbert 
> 
> 
> Sent from my iPhone
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