[time-nuts] HP 5275A

Scott Stobbe scott.j.stobbe at gmail.com
Sun Nov 6 17:21:12 EST 2016

You could try heating the transistor and bushing then give the to5 a shot
of cold spray or supper duster hoping it will shrink enough to slide out.

On Sunday, 6 November 2016, Adrian Godwin <artgodwin at gmail.com> wrote:

> Slightly off-topic, as this is a general repair question. But it's a TIC.
> I'm repairing a 5275A timer (all-discreet count logic to 100MHz, neon bulb
> display, a most amazing bcd to decimal decoder made from neons and LDRs,
> 1-2-2-4 decade counters ..) and the current problem is a 2n1038-2 germanium
> T05 transistor in the power supply.
> It's mounted in an aluminium bush which is then isolated from the chassis.
> I don't think the bush is also a collet but I can't see how to remove the
> transistor. It resists ungentle pushing .. should I push it with a hammer ?
> Or is there a kinder way ?
> (I'm hoping to eventually put this into a system with a 101A oscillator and
> a 9815A calculator to measure the ADEV of a Boule electric pendulum clock).
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