[ARC5] BC-230 - 10, 10Y, VT-25, etc.

[Kenneth G. Gordon]

Well, Gents, although both of you know far more than I do about this series 
of rigs than I, I DID find this in that 45 page manual I downloaded some time 
ago:

SPECIAL NOTICE

In Radio Transmitter BC- ( ) -230 or Radio Transmitter BC-( )-430, a part of Radio 
Set SCR-( )-183 or Radio Set SCR-( ) -283 respectively, care should be exercised in 
selecting tube types to be used in the oscillator and power amplifier circuits.

For satisfactory performance Tube VT-25 as manufactured by Western Electric 
Company only, or any Tube VT25-A shall be used. (Signal Corps Stock No. 2T25A).

The use of other Tube VT-25 as manufactured by other concerns will seriously 
affect calibration and neutralization of this transmitter.

This may help explain David's experiences.

Ken W7EKB