[Jim Dutridge]

Seems odd to me that Philco would run the antenna lead over top of the filter caps and the power cord. Would that not induce unwanted noise? Has anyone noticed this and tried rerunning the wire along the chassis?

[morzh]

Jim


If you mean the wire going from the Volume pot to the back, here
https://cnj.craigslist.org/ele/d/tennent...98899.html
It does not seem to run ovefr those. Quite the other way.
(click to the phot of the chassis bottom).
In another chassis I see it crossing diagonally only over the power wire (not over the can), but this is at a right angle, so it is pretty insignificant.

[Jim Dutridge]

I see in that picture that the power cord is held next to the chassis with the clip that in mine holds the antenna lead. Looks like the person who had this radio before me routed the antenna lead like that. I'll reroute the lead.

[Dave Schings]

My wire runs the way yours does, Jim. From the antenna, to the clip under the right rear chassis mount, then to the volume control.

Dave

[radio1]

Yes, that wire will not pick up much interference as routed - the RF at that level won't be affected, and if you have stuffed the original filter caps on top, it won't cause much of a problem. The main problem with these old radios of that era is the finely wound coils (such as the main antenna coil from that wire) has turned to basically mush (don't know exactly what they coated it with or soaked it in), cut one open and examine with a magno glass to see. Put a signal tracer on that front end and hear it, that sound is amplified thoughout the remaining stages and ruins it, the radio just won't filter it out and it sounds nothing like when it was new - that coupled with all the interference of todays meanies that hit it. You have to rewind these with fresh wire and start at the front end to get any sort of good fidelity, can you say get a coil winder? Then you can work your way from the front end to the final result. Turn the tone cap off and hear the awful sound, that is the mush I am speaking of, it should not sound that way. I have found some good sounds and decidedly bad sounds out of the 70. The IF coils suffer from this as well.

[morzh]

I am not sure I understood about the coils and the mush. I looked an more than one coil in 20, 70, 90, 60, Zeniths and such.
The reason to failure would usually be the corrosion caused by the celluloid disintegration, but the wire was just that, wire, no mush.

[Jim Dutridge]

I agree. From the ones I've worked on its always been that green corrosion that causes the coils to open.