>
>>Another question. What is the RF current derating by frequency when a
>>switch is factory specified at 115VAC 60Hz ?
>
? Depends on the frequency. At 28MHz, 20A-@60Hz contacts might be good
for 5A continuous.
>>And still another question:
>
>What is the rating of that switch in an environment of elevated
>temperature? Keep in mind that inside an amplifier cabinet, you won't
>have 25 C temperatures. Plus the switch itself will get hot or warm due
>to the RF current flowing through it. All these serve to derate the
>device.
>
? Good points. This is probably why Heath used two, paralleled sets of
output bandswitch contacts as well as bandswitch forced air cooling in
the SB-220. .
>
- later, Jon
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
--
FAQ on WWW: http://www.contesting.com/ampfaq.html
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|