[Ron Ramirez]

All four of the Magnetic Tuning lamp sockets have now been rebuilt, and the incorrect #55 lamps replaced with #44.

Mike (Morzh), and anyone else interested - Take a look at the partial schematic linked here:

[Image: http://www.philcoradio.com/images/phorum...c0157a.jpg]

The resistor in question is part (177). Philco made a production change in which the 325 and 80 ohm sections became separate resistors and the values changed to 300 and 75 ohms, respectively. This 37-690 had that production change.

I have not measured voltages at the taps, and Philco does not give that information in the Service Bulletin.

Candohms hot...if it dissipate so much (for a 50W resistor to get so hot you have to dissipate at least 15W or so) - and I do not have a good qualty sch - do you think it makes sense to try to play with the values to maybe reduce currents while keeping voltages?

I am open to all suggestions.

Oh, and regarding Band 2: It receives the alignment signals of 4.5 and 1.7 mc, but very weak. The oscillator adjustment screws on that band have no effect.

And, yes, the RF unit in the 37-690 is identical to that used in the 37-116 (and 37-675).