[Amps] al80a

[Ian White, G3SEK]

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.

-- 
73 from Ian G3SEK          Editor, 'The VHF/UHF DX Book'
                           'In Practice' columnist for RadCom (RSGB)