10-25-2014, 07:03 PM
Review: Here is how the underneath of the chassis looked before I began working on this set:
[Image: http://www.philcoradio.com/images/phorum...e00002.jpg]
And here is how it looks now:
[Image: http://www.philcoradio.com/images/phorum...e00010.jpg]
I've replaced every wire that I could reach. A few wires in the vicinity of the band switch received color-coded heat shrink tubing as I was not able to reach both ends of those wires with a soldering iron without risking damage to a coil or other wires in the process. Three rubber-covered wires remain; these three connect to ground and even if the dried out rubber falls off, they are not touching anything else and should be OK.
Here's the antenna coil which I rewound the AM primary winding on, back in place on top of the chassis:
[Image: http://www.philcoradio.com/images/phorum...e00012.jpg]
I've even replaced the resistor (29) and capacitor (30) which connect between the volume control loudness tap and ground. Here is a difference between the 42-724 and the 42-720: In the 724, this combination is 10K ohms and 0.1 uF. In the 720, it was 22K and .02 uF. The replacements are 22K and .022 uF inside the original .02 uF sleeve.
[Image: http://www.philcoradio.com/images/phorum...e00014.jpg]
You will note the grounded end of (30) is not yet connected to the solder lug. This is because that lug is on the back of the dial scale backing plate, and that will have to be removed, painted, and re-flocked once the flocking material gets here.
See how rough the backing plate is:
[Image: http://www.philcoradio.com/images/phorum...e00016.jpg]
Well, folks, that's it for now until the electrolytics and flocking fibers arrive.
[Image: http://www.philcoradio.com/images/phorum...e00002.jpg]
And here is how it looks now:
[Image: http://www.philcoradio.com/images/phorum...e00010.jpg]
I've replaced every wire that I could reach. A few wires in the vicinity of the band switch received color-coded heat shrink tubing as I was not able to reach both ends of those wires with a soldering iron without risking damage to a coil or other wires in the process. Three rubber-covered wires remain; these three connect to ground and even if the dried out rubber falls off, they are not touching anything else and should be OK.
Here's the antenna coil which I rewound the AM primary winding on, back in place on top of the chassis:
[Image: http://www.philcoradio.com/images/phorum...e00012.jpg]
I've even replaced the resistor (29) and capacitor (30) which connect between the volume control loudness tap and ground. Here is a difference between the 42-724 and the 42-720: In the 724, this combination is 10K ohms and 0.1 uF. In the 720, it was 22K and .02 uF. The replacements are 22K and .022 uF inside the original .02 uF sleeve.
[Image: http://www.philcoradio.com/images/phorum...e00014.jpg]
You will note the grounded end of (30) is not yet connected to the solder lug. This is because that lug is on the back of the dial scale backing plate, and that will have to be removed, painted, and re-flocked once the flocking material gets here.
See how rough the backing plate is:
[Image: http://www.philcoradio.com/images/phorum...e00016.jpg]
Well, folks, that's it for now until the electrolytics and flocking fibers arrive.
--
Ron Ramirez
Ferdinand IN