>
>If W6NQ is correct and the 8874 uses the same socket as the 8873 then the
>3CX800 will fit also since it uses the same socket as the 8874.
? However, for multi-tube installation, the socket spacing with
3cx800A7s must be a bit wider than with 8874s in order to accomodate the
3cx800A7's wider anode cooler.
>
>just another option for a nice little amp.
>
>lane
>Ku7i
>----- Original Message -----
>From: W6NQ <w6nq@rfparts.com>
>To: <amps@contesting.com>
>Sent: Monday, December 13, 1999 8:29 PM
>Subject: Re: [AMPS] SB-230 re-tube?
>
>
>>
>> You might also want to look into another version of the 8873, which is the
>> 8874/3CX400A7 triode. It uses the same socket as the 8873.
>> No screen supply required. Modification for air from the bottom is
>> required.
>>
>> If considering a conduction cooled version of the 4CX250B,
>> look at the 8560A/AS (Eimac & Svetlana).
>> One of the Svetlana low cost tube sockets (SK2A @$10) should mount easily.
>> Regards, Merit W6NQ
>>
>>
>>
>> > Seriously, the effort you put in to replace the tube with an air cooled
>> tube
>> > could be put into finding a used replacement. If you are determined,
>you
>> > could use the conduction cooled tetrode version of the 4CX250 and then
>> > install a screen regulator circuit and continue to drive cathode, ground
>> > control grid for rf, bias tube, and use screen voltage.
>>
>>
>>
>> --
>> FAQ on WWW: http://www.contesting.com/ampsfaq.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/ampsfaq.html
>Submissions: amps@contesting.com
>Administrative requests: amps-REQUEST@contesting.com
>Problems: owner-amps@contesting.com
>Search: http://www.contesting.com/km9p/search.htm
>
>
- Rich..., 805.386.3734, www.vcnet.com/measures.
--
FAQ on WWW: http://www.contesting.com/ampsfaq.html
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|