[Collins] 75A-4 / dead V-7 Plate Choke 2.0 Mh L-25

[Keith-Radio room]

Hello Gentlemen,

Recently acquired an additional 75A-4 serial number 3915 and the
Q-multiplier was not working, upon inspection and a quick voltage check at
V7 no plate voltage at pin 6 / 12AX7, L-25 (2 Mhy) was open.  Question; has
any one changed L-25 and what would be the correct current rating and I
would imagine the DC resistance plays an important role as part of the "T"
filter in the Q multiplier circuit (R36 & L26) and its calibration.  Is
there a part number you could suggest out of Mouser or Digikey?  Thanks for
your assistance.

 

Regards,

Keith 

 

Keith-KE7GPO

425-392-8843

RadioRm1 at comcast.net