[time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k

[Mark C. Stephens]

Most of the Caps I have of that size are around ~1/2 the capacitance but twice the voltage.
I'll go check the dumpster (...err garage) for some old gear that's due to be scrapped.
I am going hate myself if I have to part mule a probably working 8568A/B for a some sort of PSU cap.
Yeah, I see your point about the cap voltage, that hadn't occurred in my electrolytic candidates to me for some reason!
I'll take that one on-board definitely :)

-marki

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf Of Chuck Harris
Sent: Saturday, 6 July 2013 11:05 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 5370B Leds pulsing slowly, buttons selecting normally, PB LEDS scannning and appears to be reading o/k

Mark C. Stephens wrote:
> Correct, C3 (17000uf @ 10v) is measuring 39uf :) I have a 29000 at 10V, 
> same dimensions, do you think the rectifiers can hack that big fella?

Without a blush!

Except for the 10V part.  (Which I missed on the first post)

You have to use a capacitor that is at least 2x the operating voltage, and is also greater than any peak voltages that could occur in the boundary cases, such as the power line being at the scope's rated maximum power line voltage.

-Chuck Harris
> 10000uf is quite a bit more.
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