>
>> I gather SB220 have a reputation for good tube life, altho the available
>> voltage means tubes are slightly under run.
>
>How about 45% under run, Dr. Barry!
>Too bad most amps on the commercial market today have no such
>headroom in power or cooling.
>
>I have worked on many of the Heath SB series amps. A lot of the
>tubes are 25 + years old, and still going strong. Most of the tube
>failures I have seen in Heath gear are from mistreatment and
>failure of other components.
>
>(((73)))
>Phil, K5PC
>
? The failure of which components, Phil? // Most of the 3-500z
failures that I have seen are due to a fil./grid short following a
'big-bang'.
>
cheers
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
--
FAQ on WWW: http://www.contesting.com/FAQ/amps
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
|