Replied off-list but suggestions welcome.
On Sun, Mar 31, 2019 at 6:00 PM Mod Mix wrote:
> Hi Adrian,
> sorry for cantacting you directly...
> I've got a pair of KS-24361 showing now the red FAULT led on just after
> applying power.
> As I don't know much about these electronics: could you pls
Hi Adrian,
sorry for cantacting you directly...
I've got a pair of KS-24361 showing now the red FAULT led on just after
applying power.
As I don't know much about these electronics: could you pls give me an
indication where to find a possibly failed tant?
Thank you in advance
Ulli
Am
Hi
Well …. ummm …. errr …. it turns out that there *are* (or were) papers
published on the topic that are
“well known” in the … e …. space community and pop right out of the stack
of papers that the guys
from …. errr …. a well known space outfit in California bring with them ….
The issue
In message <1f48decf-dee6-220f-f7ce-948642724...@rubidium.se>, Magnus Danielson
writes:
>The trouble with aluminium electrolytics is [...]
Thanks for proving the exact point I made in my email yesterday.
Now please go read it, because it contains some important details :-)
--
Hi,
On 2019-02-25 07:48, Poul-Henning Kamp wrote:
In message
, Dana
Whitlow writes:
This would seem to imply that purposely overrating a 'lyt is pretty pointless.
Any comments on this notion?
I've always wondered that myself, and found very little documentation or
wisdom
On 2/25/19 5:48 AM, Bob kb8tq wrote:
Hi
Indeed there is both a minimum and a maximum working voltage for a properly
derated electrolytic
capacitor. We found that out in the middle of a design review when the
customer’s team brought it
up … (much to our surprise).
Bob
The Cornell Dubilier
Hi
Indeed there is both a minimum and a maximum working voltage for a properly
derated electrolytic
capacitor. We found that out in the middle of a design review when the
customer’s team brought it
up … (much to our surprise).
Bob
> On Feb 25, 2019, at 1:48 AM, Poul-Henning Kamp wrote:
>
I do not know, if the brake down voltage decreases if the electrolyte
capacitor is used well bellow the original rated voltage, but I know
from experience, that if you cautiously and slowly increase the voltage
across the capacitor it will work at higher than the rated voltage, but
with
In message
, Dana
Whitlow writes:
>This would seem to imply that purposely overrating a 'lyt is pretty pointless.
>
>Any comments on this notion?
I've always wondered that myself, and found very little documentation or
wisdom available.
As I understand it, even very brief voltage
I remember often reading that if you run a 'lyt at a voltage much reduced
from its rating,
the oxide layer would get thinner over time so that in the end, the
effective rating of the
capacitor was about what you had been running it at. This would seem to
imply that
purposely overrating a 'lyt is
Am 24.02.19 um 14:39 schrieb Richard (Rick) Karlquist:
yet they got a pass and became SOP. The R lab manager
at Santa Clara Division famously said "no customer chooses
HP products because they have great power supplies."
G.. My HP16500C has a defective PS and my 4274A RLC bridge
Adrian I had the same thing in the same unit. I guess the electrolytic's
were bad in allowing hum through. The tants go Bang and burn. Though all
caps can go bang I suspect.
Paul
WB8TSL
On Sun, Feb 24, 2019 at 5:04 PM Adrian Godwin wrote:
> Just to sneak that back on-topic .. the most recent
In message
, Adrian Godwin writes:
>I think I've had as many shorted-out tants as dried-out electrolytics.
I doubt Len worried about dry-out, he was worried about shorts.
A lot of people failed, and still fail, to realize that tube-voltage
electrolytics are an entirely different
Just to sneak that back on-topic .. the most recent tant failure I had was
in a KS-24361. It was after the dc-dc converter so it didn't look like a
short to the input - it just increased the current draw. Running off a
cheap laptop supply, which overheated and melted instead of shutting down
or
I think I've had as many shorted-out tants as dried-out electrolytics. It's
just that they appear in 80s gear instead of 60s. Then there was the flood
of high-esr electrolytics from when - early 2000s ?
On Sun, Feb 24, 2019 at 1:10 PM Rice, Hugh (IPH Writing Systems) <
hugh.r...@hp.com> wrote:
On 2/24/2019 4:02 AM, Rice, Hugh (IPH Writing Systems) wrote:
Several people have asked about the Len Cutler ban on Aluminum Electrolytic Capacitors in HP Frequency Standards. Rick Karlquist could shed more light on this too. The legend of the ban was passed along to me, perhaps by Lou
Several people have asked about the Len Cutler ban on Aluminum Electrolytic
Capacitors in HP Frequency Standards. Rick Karlquist could shed more light on
this too. The legend of the ban was passed along to me, perhaps by Lou
Mueller, who liked to tell stories of the old days. In 1985, we
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