On Tue, 9 Dec 1997 09:39:26 -0500 "Walter Kornienko" <zak@goes.com>
writes:
>What is the best type of resistor to use in the HV lead
>to a power amp.
An enameled wirewound Walt...not a ceramic type.
A good wirewound should be able to
>act as a fuse as well, right?
Absolutely not! It is there as a current limiter only and must be able
to survive the hit long enough for it to pass or a fuse/breaker blows.
Any recommendations
>as to where to find a wire wound resistor that'll handle
>kV and have ample dissipation to handle legal output?
You need 10-20 Ohms or so depending on the tubes and the amount of
current limiting. A typical value may be 20 Ohms @ 25W. In a HV line over
3000V or so putting 2 or more resistors in series to spread the HV
breakdown path is advised.
I sell 6.3 Ohm 15W Dale's at $2.50 if ur interested in a series string of
2 or 3. Other sources are any of the standard catalog houses that carry
Ohmite, Clarostat, Dale and similar quality brands.
BTW, congrats on winning your RFI lawsuit !
73 Carl KM1H
>
> 73 de Walt Kornienko - K2WK - zak@goes.com
>
>
>
>--
>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
>
--
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
|