[time-nuts] Replacement A9 boards for the HP 5065A

Bob kb8tq kb8tq at n1k.org
Sat Feb 24 18:56:31 EST 2018


Teflon is the traditional “best of the best” for integrator caps. Simply finding 
any plastic cap  (other than a motor start device) up around 5 uf is not that easy 
these days.  As mentioned by PHK, being sure it is what it’s supposed to be ….
good luck. 


> On Feb 24, 2018, at 6:45 PM, <cdelect at juno.com> <cdelect at juno.com> wrote:
> Hi,
> I'm working to make some replacement A9 boards for the HP 5065A to the
> new style schematic.
> Will share the Gerber file when done.
> The integrator capacitor is a 1986 vintage TRW 5.0ufd 50V 10% .42"DX1.0"L
> axial.
> Of course it has an HP part number and no manufactures #.
> Any guess as to what type it is?
> Polycarbonate, polypropylene, ???????
> Just wanting to find a good modern replacement for its use. (Integrator
> with a 50ms time constant.)
> Thanks,
> Corby
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