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Philco 89 Lower Frequencies
#11

Hello, I would like to add some information on my problem since I have probably confused most of you and probably will continue although I hope not. I have done some considerable checking of my work and parts. I think I can safely say at this point I have found the problem. The tuning cap on this radio lays flat. By that I mean the stationary section is parallel to the chassis. On the front side of the chassis is where the trimmers are for antenna, RF and oscillator. There is a connection point under each of these trimmers (gangs) but nothing is connected there. This is the front side of the stationary fins. On the back side there is a connection point for each gang that have connections going under the chassis. I removed these wires and then did some continuity checks between the front and back. The antenna gang had about 340 ohms. The RF gang had .8 ohms. The oscillator gang had 45 ohms. I would have thought all of these would be close to 0 ohms. There are four screws for each gang two in the back and two in the front. I took the screws out one at a time and cleaned the threads best I could. I found some were not very tight but not too loose. After adjusting the screws by varying the tightness I was able to get the gangs around one ohm. I did not mess with the RF gang as it was under one ohm. After playing the radio multiple times and length I continue to have reception the full scale.

Anyone ever run into this? Is my problem solved or have I just disturbed the problem and will bite me later on? Can I run wires from the front to the back without causing a problem? I asked this as I'm afraid after multiple heat soaks the continuity problem will return.


Messages In This Thread
Philco 89 Lower Frequencies - by dconant - 12-10-2023, 03:08 PM
RE: Philco 89 Lower Frequencies - by klondike98 - 12-10-2023, 05:33 PM
RE: Philco 89 Lower Frequencies - by MrFixr55 - 12-11-2023, 09:06 AM
RE: Philco 89 Lower Frequencies - by dconant - 12-11-2023, 09:27 AM
RE: Philco 89 Lower Frequencies - by Radioroslyn - 12-11-2023, 10:28 AM
RE: Philco 89 Lower Frequencies - by dconant - 12-11-2023, 12:07 PM
RE: Philco 89 Lower Frequencies - by dconant - 12-11-2023, 01:17 PM
RE: Philco 89 Lower Frequencies - by dconant - 12-11-2023, 04:42 PM
RE: Philco 89 Lower Frequencies - by dconant - 12-11-2023, 06:06 PM
RE: Philco 89 Lower Frequencies - by Radioroslyn - 12-11-2023, 08:45 PM
RE: Philco 89 Lower Frequencies - by dconant - 12-16-2023, 07:06 PM
RE: Philco 89 Lower Frequencies - by Radioroslyn - 12-16-2023, 10:10 PM
RE: Philco 89 Lower Frequencies - by RodB - 12-16-2023, 10:11 PM
RE: Philco 89 Lower Frequencies - by dconant - 12-17-2023, 09:55 AM
RE: Philco 89 Lower Frequencies - by RodB - 12-17-2023, 11:01 AM
RE: Philco 89 Lower Frequencies - by dconant - 12-17-2023, 11:12 AM
RE: Philco 89 Lower Frequencies - by Radioroslyn - 12-17-2023, 02:42 PM



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