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FYI,<br>
I ran across this on the Svetlana Web Site
(<a href="http://www.svetlana.com/docs/dictionary.html" eudora="autourl">http://www.svetlana.com/docs/dictionary.html</a>.)
May be an alternative for SB-230s with bad tubes.<br>
Bill KO4NR<br>
<br>
8873--conduction-cooled tetrode, popular in amateur radio linear amps
(Heathkit SB230)--made in USA. Suggest retrofit with Svetlana
<font color="#0000FF"><u>4CX400A</font></u><font color="#000000"> or
</font><font color="#0000FF"><u>4CX800A</font></u><font color="#000000">.
Svetlana has Technical Bulletins Nos.
</font><font color="#0000FF"><u>14</font></u><font color="#000000"> and
</font><font color="#0000FF"><u>19</font></u><font color="#000000">,
describing this retrofit into similar amateur linear amplifiers. The 8874
can also be retrofitted (see 8874).<br>
<br>
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