Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12) x

Thread Closed
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

48-482 tuner "restring"
#2

Hi Tkline and welcome!

Your set is the same model I have had since 1968. One of my first 'old' radios. When I used it, it played very well, and I logged many shortwave and AM stations on it.
I still have it, however I am not powering it up again until I change the original capacitors.

First off, you can find the schematic diagrams here, which include the dial cord stringing diagram.
http://www.nostalgiaair.org/Resources/637/M0013637.htm

Next, since the set was working well in the past, you would only need to replace the 'filter capacitors' first, then test to make sure your installation was correct.
Next you should replace the other smaller capacitors. You could leave the others alone, but soon you might need to replace one or more that are not working right, so it is best to do then while the chassis is out of the cabinet. The main 'filter capacitors' are in the power supply section of the set, and they filter your current that passes to the rest of your set. They are critical to have working right. You have heard a radio that has a hum in it? That's an indication that the filter caps have dried up and not working.

This is the reason, after 62+ years, the old 'caps' have dried out and usually don't work as they should. Even if a set works on it's old parts, you will be onb borrowed time before they fail. Sure, you could use the set, but if a filter cap fails, it can take out a transformer, speaker, or other hard to find part. "Recapping' is a good way to have a reliable and safe operating set for many more years.

I suspect that the tubes will be fine. If you have access to a tube tester, that will be on your list in the process.
Here are a couple of links I pass on to others new to the hobby that explains a little more about the caps.
http://www.philcoradio.com/tech/plugin.htm

http://antiqueradio.org/powerup.htm

Changing these parts is not hard, but it must be done carefully. Do you have any experience in soldering or electronic work?
I am not sure, Ron can fill us in, but there could be some rubber insulated wires under the chassis. If the insulation has rotted and showing bare spots, it must be replaced. We can help guide you with that if need be.

Lubing all moving parts, cleaning off all the dust that may be on the chassis, and using a little contact cleaner on the pushbutton assembly are part of the process. That will make for smooth control operation and static free pushbutton operation. Re-stringing the dial cord is not hard to do, and you can either buy dial cord, or some even use dacron fishing line (Not monofilament)

Lastly, some of those tube are of the Loktal type. These are used by many Philcos and were made to 'lock in' to their sockets. Unfortunately, they have a tendancy to get oxidized pins that must be cleaned off for good contact. Once cleaned they work just fine.
There is a method to take those tubes out , some don't know about. On the base of the tube, there is a little raised dimple. Gently rock the tube in the direction of that dinple back and forth toward you. It should come out easily.

I will stop here, but this gives you a little idea of how to properly get the radio going again so it will be safe and reliable.
If you are good at working on things, being careful and asking questions, you will have no problem in getting your radio playing like new. I am sure your father would be happy that you have restored it.

Take care,
Gary.


Messages In This Thread
48-482 tuner "restring" - by tkline - 01-11-2011, 11:16 PM
Re: 48-482 tuner "restring" - by gary rabbitt - 01-12-2011, 08:09 PM
Re: 48-482 tuner "restring" - by gary rabbitt - 01-12-2011, 08:42 PM
Re: 48-482 tuner "restring" - by tkline - 01-13-2011, 01:59 PM
Re: 48-482 tuner "restring" - by gary rabbitt - 01-13-2011, 10:55 PM
Re: 48-482 tuner "restring" - by Steve D - 01-14-2011, 09:20 AM



Users browsing this thread: 2 Guest(s)
[-]
Recent Posts
6TPZ and 5TPO Radio Help
Welcome to the Phorum, R3Sons! I have very limited experience with car radios other than installing custom radios back ...GarySP — 01:08 PM
462ron
OK, I need to rename this thread to say..Eico 368 TV/FM Sweep Generator instead of the current title..Heathkit Sweep Gen...462ron — 12:49 PM
6TPZ and 5TPO Radio Help
Hello, I have a Philco (Ford) 6TPZ and a 5TPO radio.  I replaced the electrolytic capacitors in both.  I have the SAMS m...R3Sons — 12:29 PM
The list of my radio & TV collection!
Hello Peter, Thank you for posting that !! Sincerely Richardradiorich — 09:40 AM
Eico 232 VTVM Schematic
It's a microwave antenna. ?;-p?. I substituted 1N4002s off the 6.3 vac winding for the 1.5 volt battery. Uniprobe is the...RodB — 05:50 PM
Eico 232 VTVM Schematic
Try BAMA for a schematic. Looks like a replacement power source for the D battery has been installed. The tube may be...Chas — 04:51 PM
Eico 232 VTVM Schematic
Is that a battery holder?morzh — 04:43 PM
Eico 232 VTVM Schematic
A friend gave me this Eico 232 VTVM and I'm having trouble locating the schematic for it. This one seems to be a later v...RodB — 04:17 PM
Var resistor id
Considering what it is in series with, I doubt there should be any power requirements. Of course, we should know wher...morzh — 03:23 PM
Var resistor id
Trim pot, about 1/2 watt part of focus divider. As stated 2k ohms. This appears to be a rusty chassis, resolder all ...Chas — 03:19 PM

[-]
Who's Online
There are currently 6484 online users. [Complete List]
» 2 Member(s) | 6482 Guest(s)
AvatarAvatar

>