The Ta caps in old HP gear should last virtually forever, especially
if they have already lasted for decades. What you are referring to as
wet slug Ta caps are mostly dry solid ones in hermetically sealed
cans. There can be some actual wet slug types, but only in certain
spots where their
I've taken a hybrid approach I'm using an in circuit ESR meter to determine
whether cap needs to be replaced
Tantalum capacitors usually fail because of running them too close or at rated
voltage. HP unlike others in the industry did not tend to do this so I've had
a low incidence of
Hi Perry:
(shameless plug) Have you measured the tantalum caps?
I sell a combined ESR Capacity meter that does in circuit tests on powered
down circuits.
http://www.prc68.com/P/Prod.html#ESR
For an example of it's use on a Heathkit GC-1000 WWV clock see:
I bought one of those ESR testers some time ago. It works very well. It is
from Russia, but ordering from Brooke is much easier :-)
Joe Gray
W5JG
On Mon, Nov 10, 2014 at 6:51 PM, Brooke Clarke bro...@pacific.net wrote:
Hi Perry:
(shameless plug) Have you measured the tantalum caps?
I sell
List,
OK everybody, let’s not get our pacemakers wound upG
The problem. (Long Intro)
I have about 15 pieces or so of older HP test equipment.
3586B, 5370B, 5335A to name a few. Because of their age of 20+ years a few
have failed and need repair. I
have decided to go on a wholesale
Hi
The high grade aluminum electrolytics and the tantalums will look quite
different on a network analyzer as you sweep them from 100 KHz up The ESR of
the electrolyitcs will be significantly higher and they may go inductive. The
tantalum caps (for what ever reason, I’ve seen more than one
- Original Message -
From: Perry Sandeen via time-nuts time-nuts@febo.com
To: time-nuts time-nuts@febo.com
Sent: Saturday, November 08, 2014 6:32 PM
Subject: [time-nuts] Electrolytic Capacitor Question
List,
OK everybody, let’s not get our pacemakers wound upG
The problem. (Long
On Sun, 09 Nov 2014 23:21:22 -0500
Tom Miller tmiller11...@verizon.net wrote:
snip
Take a look at the Aluminum Organic Polymer Electrolytics.
Available in 105 °C and 125 °C. They have very low ESRs. In the
milliohms.
