Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12, 2025) x

Thread Closed

philco 48-1283 wiring issue
#8

jtkmsms, thank you. Have you taken all the voltage checks on the unit. Your symtoms are curious and I can not think of an obvious cause. The power switch on your set is in the chassis side. You may want to be sure that when you plug the set in the blade on plug that goes to chassis goes to the gnd/low/long slot on receptacle (make sure receptacle is wired correctly). That could be the source of the jolts. Many restorers strongly suggest that you use an isolation transformer to plug the set into so it has no reference to house ground. The schematic and info on basic trouble shooting of that radio are available at Nostalgia Air under Resources, Philco Radio & TV, 48-1282. It shows changes for 1283. The changes in the 35L6 section 2 are the removal of C200, C205 changes value to .03mf (from .05mf), shield on phone cable goes directly to B- (not chassis in your unit). Check polarity C101 & C102, make sure neither can (if not in same can) grounded to chassis and + of C102 to - C101. B- on this unit is ungrounded side of R102 (120,000 ohm) and travels throughout set. I am interested to know what C304-305 are. Schematic shows cap with small coil next to it with no part #. I think they may be what I have heard called "gimmick" coils, used to filter out interferance from a marine band that is no longer used. If you go through the above and report back finding maybe others can help. PL


Messages In This Thread
philco 48-1283 wiring issue - by Guest - 04-24-2009, 05:31 PM
Re: philco 48-1283 wiring issue - by planigan - 04-24-2009, 11:34 PM
Re: philco 48-1283 wiring issue - by Texasrocker - 04-25-2009, 03:52 AM
Re: philco 48-1283 wiring issue - by Guest - 04-25-2009, 10:06 AM
Re: philco 48-1283 wiring issue - by codefox1 - 04-25-2009, 01:23 PM
Re: philco 48-1283 wiring issue - by planigan - 04-25-2009, 08:12 PM
Re: philco 48-1283 wiring issue - by Guest - 04-26-2009, 12:07 AM
Re: philco 48-1283 wiring issue - by planigan - 04-26-2009, 01:36 PM
Re: philco 48-1283 wiring issue - by planigan - 04-26-2009, 01:52 PM
Re: philco 48-1283 wiring issue - by Guest - 04-26-2009, 04:45 PM
Re: philco 48-1283 wiring issue - by planigan - 04-26-2009, 06:47 PM
Re: philco 48-1283 wiring issue - by planigan - 04-26-2009, 11:10 PM
Re: philco 48-1283 wiring issue - by Guest - 05-03-2009, 12:43 AM
Re: philco 48-1283 phono cartridge replacement - by Guest - 05-06-2009, 04:36 PM
Re: philco 48-1283 wiring issue - by Bob - 05-06-2009, 08:41 PM
Re: philco 48-1283 wiring issue - by planigan - 05-08-2009, 01:13 AM



Users browsing this thread: 2 Guest(s)
[-]
Recent Posts
HiFi (Chifi) tube amp build - but my own design.
It's the other forum. I'm also in DIY, but mostly read there. Honestly, I kinda jumped into this without much thought to...TV MAN — 10:43 AM
Philco 71 Code 125
Hello,  I am in need of a schematic for this radio. Mine has the three separate circular tube shields and a shadow me...dconant — 08:06 AM
Stromberg Carlson 1500 Squeal
And life just keeps getting more complicated.dconant — 07:57 AM
54C Complete Teardown/Rebuild
Hello Roy, here is this one sincerely Richardradiorich — 12:45 AM
54C Complete Teardown/Rebuild
Richard, Had grabbed it already but thank you just the same.  I find myself wanting to find some way to block out the...glyphmon — 12:03 AM
54C Complete Teardown/Rebuild
Hello roy, here is a link to the schematic . Sincerely Richardradiorich — 11:54 PM
54C Complete Teardown/Rebuild
Richard, The Silvertone 2014 also is a transformerless set, so I am incorporating a 1:1 600 ohm audio isolation transfo...glyphmon — 11:37 PM
Preliminary work on wife's Silvertone 2014
Did an alignment today which was interesting.  IF alignment went great, almost all was already spot-on.  Adjusting on th...glyphmon — 11:35 PM
54C Complete Teardown/Rebuild
The main problem with adding a Bluetooth input is that this set lacks a traditional power transformer to isolate it from...radiorich — 11:19 PM
54C Cabinet Refinish
I started stripping this cabinet before it got super chilly out because I knew I wasn't going to be able to work on ...glyphmon — 11:18 PM

[-]
Who's Online
There are currently no members online.

>