[ARC5] Cap Test

[Ken]

     Sorry, not true.  Once you know what a good semiconductor junction 
looks
like, you trouble shoot a board or power supply quicker than any other 
method.
     And with a component tester on a scope, you can find bad capacitors 
in circuit.
FWIW, I have fixed at least a thousand power supplies over the last 25 
years, with a comp tester.

Ken

On 02/09/2011 11:17 AM, J. Forster wrote:
> FWIW, Huntrons are mostly useful for comparisons IMO. That is, comparing a
> known good, reference unit, with a malfunctioning one.
>
> They are near useless for measuring anything.
>
> YMMV,
>
> -John
>
> ==============
>
>
>
>>        Huntrons are good, but they run a higher voltage  on the probes.
>> That makes it harder to test higher capacitance capacitors.
>> You need to get down around 10 volts for testing them.
>>
>> On 02/08/2011 08:55 PM, D C *Mac* Macdonald wrote:
>>> Even better, try to find a good Huntron Tracker!
>>>
>>> * * * * * * * * * * *
>>> * 73 - Mac, K2GKK/5 *
>>> * (Since 30 Nov 53) *
>>> * Oklahoma City, OK *
>>> * USAF, Ret (61-81) *
>>> * * * * * * * * * * *
>>>
>>>
>>>
>>>> Date: Tue, 8 Feb 2011 18:29:49 -0600
>>>> From: kenslimmer at aircanopy.net
>>>> To: arc5 at mailman.qth.net
>>>> Subject: Re: [ARC5] Cap Test
>>>>
>>>> Robert;
>>>> The best thing I have used to test Electrolytic Caps is a
>>>> oscilloscope with a component tester, or add an "Octopus" to a regular
>>>> oscilloscope. Once you understand what you are looking for, its easy
>>>> to see a leaky cap with one. Even better you can use it for
>>>> semiconductors.
>>>>
>>>> Ken WA0SBU
>>>>
>>>>
>>>> On 02/08/2011 10:55 AM, Robert Eleazer wrote:
>>>>> Y'all please note that in WWII they "hacked" the equipment too. As the
>>>>> esteemed Mr. White described in his legendary articles, USAAF techs
>>>>> produced 9-13, 20-27 MHZ and 30-40 MHZ versions of BC-455's. Would
>>>>> hacking a unmodded set to produce one of these rare versions not be a
>>>>> worthy endeavor?
>>>>>
>>>>>
>>>>> And moving on now to less philosophical, and one would hope, less
>>>>> controversial realms, I wonder if anyone can recommend a quick and
>>>>> dirty test for electrolytic caps.
>>>>>
>>>>> Last night I turned not one, but two, 5Y3GT's into momentary night
>>>>> lights. I am trying to figure out why and I'm trying to decide if the
>>>>> previously satisfactory replacement electrolytic filter cap has turned
>>>>> violent.
>>>>>
>>>>> Normally I charge up a cap, remove the power and see how long it takes
>>>>> for the charge to dissipate. Instantaneous loss of voltage is bad. If
>>>>> it lingers on a while, slowly decaying at a steady rate, that's good.
>>>>>
>>>>> Any ideas?
>>>>>
>>>>> Wayne
>>>>>
>>>>> WB5WSV
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