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The speaker connects to L-7 and L-8. They are on the same board edge below the video connection close to the 9BR7 tube. They should be a black and a green wire if they are still there.
The 21FDP4 will work OK in place of the 21EAP4. Heater current is the same, 600 ma. The voltage will be fine. The 2.35 vs the 6.3 will even out over the string with no problem. Don't waste any time trying to recover the four volts. The set is designed to work over much greater variations.
The CRT Screen grid connection may need to be moved, depending on how the socket is wired. If so, the best way is to carefully drill out the socket rivets and move the connection from pin 2 to pin 6. If it is already on pin 6, it will work. Reassemble the socket using small nuts and screws.
Overall length is about 1/4 inch longer. There is normally enough clearance in the CRT housing if the tube is mounted correctly.
In short, with attention to details it will be fine. Don
Last edited by Don Lindsly; 03-29-2012 at 12:21 PM.
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