Hi
My name is Bob Allen and I am a first time member. I am looking for some help with a little problem I have just discovered I have.
Here is my problem, I had to replace my power cord as well as some tubes. The problem was with power cord instructions, they said that the white wire was the neutral and the black wire was the hot, here’s where my confusion came in. I’m sure that you all know that they didn’t have neutral or hot wires in the old radios,
so my question is simple how do I find out which one is hot and which one is neutral.
I can post a picture of where the power cord is attached if that will help.
Help Help
Any advice would be greatly appreciated
Thanks
Bob Allen
Welcome to the Phorum!
As you pointed out these sets did not have a polarized plug like we have in modern electrical appliances and it did not matter which way the plug was plugged in since the hot and neutral only go to the switch and other side of the primary of the power transformer (with the caps on each leg going to ground...which should be replaced with safety caps). I make it a habit of wiring the hot lead to the switch. The wire colors in the schematic are unrelated to current wire color standards for home wiring.
Here's the link to a schematic for your set.
https://philcoradio.com/library/download...20Book.pdf
Hi Klondike98
Thanks for the info.
Bob
Welcome to the Phorum, Bob! You mention changing out a few tubes and replacing the power cord. If the chassis has not been updated this would be the perfect time to replace the caps and drifted resistors. Old parts will fail, and frequently like to take other parts along with them when they do. Take care and BE HEALTHY! Gary
Hi
My name is Bob Allen and I am very new and inexperienced at restoring radios. I am at present trying to restore my 1942-380 Philco Radio. I was advised to replace the paper capacitors, which I am trying to do now.
I am trying to find some replacement capacitors but I’m afraid that I am going to buy the wrong ones.
So, I am looking for some advice on which one’s to get.
My first capacitor is a Mallory 450 V ( Negative Black) it has these numbers on it 235643,,,,2N 518
8 MFD Red. It has 3 wires coming off of it, 1 black and 2 red.
The second capacitor is Yellow, made by Sprague Atoms and the numbers on it are T.V.A. 1704
8 MFD 450 V.D.C surge voltage 525 85 degrees “c” to 185 degrees F it has a “J” and number 739
The third capacitor is red and it says cat.#m8-450 8 mf
450 W.V.D.C. 525 V.S.p.
I cannot find any (uf ) on any of them.
Any advice would be greatly appreciated.
I have looked high and low for a schematic for my 1942-380 Philco Radio, if anyone knows where I can get one please let me know. Thanks
Thanks
Bob Allen
Hi Bob and welcome,
Here's the service info for your 42-380.
https://philcoradio.com/library/download...20Book.pdf
As for the caps what you are seeking are 2x 10uf at 450vdc (#20 and 20a) and 22uf at 450vdc (#61) Mfd and Ufd are equivalent. 105deg are better than 85deg.
GL!
ps. Not a particularly fun set to service.
Bob
It's not as bad as it looks. The Solar and Sprague are replacements from the '60s and use two in parallel to make one the right value (for #61). I take it your a non reader of schematics? The brown tube w/the wire sticking out of one end is the a dual cap #20 & 20A. The modern replacements are about 1/2 the physical size of the originals. I would take the new replacements bundle them w/a layer electrical tape and then use a zip tie to secure it to the chassis. Where the metal strap was. Use wires and black shrink tube to connect to it proper connections.
You will probably find some decayed rubber wire. Replace it so you don't have any shorts or major failures. The Stancor transformer is a replacement also but is a common problem w/'40-'42 sets. So it's too alarming.
I believe as per Phorum rules is thread will get merged with with the your cap thread.