Hello to the group I diid put together a strange replacement for a counter some time ago. I used the typical 1016 ecl chip. But the real chips a lot more clever than that. As I recall the slicing level also goes into that chip. I remember its was more complicated than I had thought. Regards Paul WB8TSL
On Wed, Feb 10, 2021 at 10:59 AM Magnus Danielson <[email protected]> wrote: > Hi, > > This was to some degree out of necessity that they had to design some > chips to meet their needs, but as it was done "in house", it was also an > opportunity to get ahead competition. They have done some pretty strange > chips through the day. They often had a separate article in HP Journal > to show off how cool they where. Finding that for the 5370A (and 5345A) > may be a good start in addition to the manual. > > As I recall, isn't the input board of the 5370A actually the same as for > the 5345A? It may be shared with more counters. Yes, it is, I checked > the 5370B manual. So that then increase the potential donor range. > > With a bit of head-scratching, I think that one should be able to find > sufficiently equivalent functionality in more modern chips, and some of > the head-scratching to retro-fit it, which meets a bit of challenge also > to maintain signal integrity. > > Cheers, > Magnus > > On 2021-02-10 15:06, Bob kb8tq wrote: > > 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 <[email protected]> > 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 > >> _______________________________________________ > >> time-nuts mailing list -- [email protected] > >> To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > >> and follow the instructions there. > > > > _______________________________________________ > > time-nuts mailing list -- [email protected] > > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > > and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
