[R-390] Which Ballasubstitution? You decide.

[Tom Norris]

*No one* expects (ominous music here)
THE ANTIBALLASTUBSTITUTIONISTS!!

heehee

Tom




>Just beware of the antiballasubstitutionists -- radical new age splinter
>group of the Spanish Inquisition ...
>
>Anon
>
>----- Original Message -----
>
>  > Hello All,
>>
>>  On the subject of ballasubstitutions a question was raised by Kenneth.
>>
>>  He inquired as to which of two methods is the better. Each has advantages
>>  and disadvantages:
>>
>>  1. 12BH7 modification: same heat production as 3TF7, needs another tube,
>>  keeps the stock 6BA6's,
>>       looks reasonably authentic.   12BH7, 12BY7, 12BV7  can be used and
>can
>>  have gas, shorts,
>>       and/or no emission so long as the heater is good.  Using a defective
>>  tube as a power resistor
>>       gives you a sense of accomplishment; that you got something for
>>  nothing.
>>
>>  2. Two 12BA6 and a paperclip: about 3.8 watts less heat on the IF deck,
>>  needs other tubes, big empty
>>      socket.  12BA6 are easy to find.  I did not use the traditional
>>  paperclip to jumper the ballasocket;
>>      instead I  wrapped a fine wire around the two correct pins on the
>>  defunct 3TF7 and plugged it back
>>      into the socket.  Except for missing the very faint glow of the 3TF7
>now
>>  gone dark, looks original.
>>
>>  Make your choice (Remember also many other substitution schemes).
>>
>>  Drew
>>
>>
>>  _____________________________________________________________
>>  Win a new Icom IC-756PROIII and help QSL/QTH.net
>>  Details at: http://mailman.qth.net/index.html
>>  _____________________________________________________________
>>  R-390 mailing list
>>  Home: http://mailman.qth.net/mailman/listinfo/r-390
>>  Help: http://mailman.qth.net/faq.htm
>>  Post: mailto:R-390 at mailman.qth.net
>>  Unsubscribe: http://mailman.qth.net/mailman/options/r-390
>>
>
>
>_____________________________________________________________
>Win a new Icom IC-756PROIII and help QSL/QTH.net
>Details at: http://mailman.qth.net/index.html
>_____________________________________________________________
>R-390 mailing list
>Home: http://mailman.qth.net/mailman/listinfo/r-390
>Help: http://mailman.qth.net/faq.htm
>Post: mailto:R-390 at mailman.qth.net
>Unsubscribe: http://mailman.qth.net/mailman/options/r-390