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[Amps] al80a

To: <>
Subject: [Amps] al80a
From: (2)
Date: Sat, 3 Aug 2002 12:13:38 -0700
>2 wrote:
>>>While rooting around inside the SB-1000, I checked the carbon resistor
>>>in the paralytic choke... good as new.
>>**  What was the measured resistance? //   I have found that intermittent
>>vhf parasites are so brief they can damage the element of a carbon-comp
>>resistor without exhibiting damage to the moulded case.  Thus, a
>>new-appearing carbon-comp resistor can have several times more ohms than
>>its specified value.
>I'm aware of that, so I unsoldered the resistor and measured the 
>value... good as new.
>>>The RF choke and bypass caps were there as standard. Since the screwy
>>>meter readings were only on one band (the lowest) I put it down to RF
>>>rectification rather than purely threshold voltage.
>>**  In your opinion, is 88-ohms of XC an acceptable bypass for c. 1A-rms
>>of RF current?
>There are thousands of amps, of many different kinds, that seem to work 
>fine with 0.001uF. That evidence has a large influence on my opinion.
**  I am influnced by the (X x I) V-drop from c.1A passing through an 
88-ohm reactance.

-  R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,  

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