Corby would have the best answer. But this has come up before and I am pretty sure they were HP specials. Great that you have 2 X 5065s, wow. I don't want to mislead you, but are the drive and the anttenuator set correctly? Regards Paul WB8TSL
On Mon, Aug 27, 2018 at 1:39 PM, Chicken Time <[email protected]> wrote: > Greetings, > Long, long time reader/fan, first time writer. I have a HP5065A that > I've been messing with that has a problem which I think I've narrowed down > to the SRD. It is functional but seems to have an unusual behaviour, > including visible amplitude variability and flickering of of the 2nd > harmonic. > > I've replaced everything with guts of a 2nd unit but nada. The last step > in my testing was to replace the SRD, but the only ones I could get from > easy sources were SMT ones. However, I was able to hack one in! This did > work and the 2nd harmonic was stable! BUT of poorer quality Allen Dev > with an original Axial HP step diode, of which I am not entirely surprised. > > The HP SRD has the text H391, 391, and P391 written on it. Nothing in > the Manual or Google searches gives me any indication of what it is, > including combination such as taking the number as a resistor (390). None > of HP's original list of SRDs is even close either. > > Does anyone here know what IS this SRD? > Thanks much, > Dan > > -Chickens are more obsessed with time than Humans. Proof: Clock Clock clock > _______________________________________________ > 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.
