[R-390] R-390A.... 12BA6 in PTO and BFO

[Raymond Cote]

Yes it has but I misplaced the reference to it. Thanks for spelling it out again. I'll save it correctly this time. 


Raymond Cote
KD9CCZ



On Nov 11, 2014, at 22:47, Pete Williams <jupete at internode.on.net> wrote:

​    Probably been mentioned, but 12 BA6 can be used in PTO  and  BFO while
waiting for a replacement ballast tube.
Jumper pins  2  and 7 on the  3TF7.
You have to replace both of  course  as the heaters  are  series from the
25 V  supply .  I only noticed this  on a PTO being checked out.
Stability /performance not  checked .
Cheers
Pete V K3IZ
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