philco:  ; 41-300X (41-300)

Help! I'm brnad new to this forum, so If I am violating any rules, Please advise and I will attempt to correct  my methods.

I am currently restoring a Philco 41-300 and have made a major error of not replacing wires, one at a time. I am attaching a picture of the tuning capacitor and need to have someone help me connect this now empty terminal to the right point in the radio.

If I am unable to properly upload my picture on the variable  tuning capacitor, it would be the lug on the bottom of the left capacitor of the ganged two, as viewed from the rear of the unit.

Henry

• Unconnected Tuning Capacitor (86 KB)

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Henry,

You'll have to study the schematic a bit to reconnect this point.  Since this is a multiband radio, the schematic in the areas of the two sections of the tuning capacitor is somewhat complex.  There is a 4-gang bandswitch, probably made of two wafers with a set of contacts on both sides of each wafer.  One pair of sets of contacts is for the oscillator, the other pair for the RF front end tuning.

If you examine the bandswitch, you may be able to see where the wire was connected, and you'll also want to confirm against the schematic that everything is wired correctly.

Don't give up on reading the schematic just because it is complex -- stick with it and trace out where each wire goes.  If you do that, you'll definitely be able to reconnect the missing wire.

From studying the chassis top view diagram on the schematic, it would appear that the left section of the tuning capacitor, viewed from the rear as you have specified, is the RF front end tuning (also called "antenna" or "aerial" tuning).  That may help narrow things down; it is the place on the schematic where components #10 (tuning capacitor, although the same number is used for both sections) and #10A (RF or "antenna" trimmer, right on the tuning capacitor) are paired together.

If you run into problems, take some detailed pictures of the bandswitch and some of the circuitry around it from a number of different angles and post here.  That might make it possible for me or someone else to recognize the connections and advise you regarding the specific connections.  However, it can be hard to capture in a few pictures the three-dimensional maze of wiring around a band switch.

Best regards,

Tom

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