Mod Mix wrote:
Hi,
the HP 10811D I just purchased (one like ebay #300568433895) resides
on a small pcb.
Could someone pls guide me which voltage for the LM317 feeding the
oscillator with 12V should be applied at J1/1 and J1/2 ?
I would also be interested to learn for which devices these board were
originally made - couldn't find anything.
Thank you in advance
Ulli
Without knowing anything about the item in the Ebay listing, I can tell you
that the input to the regulator supplying the 10811 oscillators in many HP
counters is specified to be +15 - +18 Volts. Actually, any voltage within
the rated input voltage range of the LM317 regulator is OK, so long as the
power dissipated by the LM317 remains reasonable.
Cheers,
Dave M
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