Just picked up a 41-295 - Printable Version
+- The PHILCO Phorum (https://philcoradio.com/phorum)
+-- Forum: Philco Radio Discussions (https://philcoradio.com/phorum/forumdisplay.php?fid=5)
+--- Forum: Philco Electronic Restoration (https://philcoradio.com/phorum/forumdisplay.php?fid=8)
+--- Thread: Just picked up a 41-295 (/showthread.php?tid=12146)
+- The PHILCO Phorum (https://philcoradio.com/phorum)
+-- Forum: Philco Radio Discussions (https://philcoradio.com/phorum/forumdisplay.php?fid=5)
+--- Forum: Philco Electronic Restoration (https://philcoradio.com/phorum/forumdisplay.php?fid=8)
+--- Thread: Just picked up a 41-295 (/showthread.php?tid=12146)
Just picked up a 41-295 - LASJayhawk - 04-27-2015
$50 and he delivered it for $10
[Image: http://i1365.photobucket.com/albums/r745/LASJayhawk/aa227b79-411f-49a3-b790-a65a7b177acf_zpsyqrqev1j.jpg]
RE: Just picked up a 41-295 - OldRestorer - 04-27-2015
$10.00 for delivery?
Cant get a pizza for that!
Nice find.
Kirk
RE: Just picked up a 41-295 - John R - 04-27-2015
Appears original grill cloth is in good condition
Need any pointers on chassis restore just ask. Spent many a day on mine. John
RE: Just picked up a 41-295 - Phlogiston - 04-27-2015
If the on/off switch works you are way ahead.
RE: Just picked up a 41-295 - mikethedruid - 04-29-2015
What a great find ! I look forward to the progress of your restoration of it. Do keep us well posted.
RE: Just picked up a 41-295 - jerryhawthorne - 04-30-2015
John, you did just excellent! $10 for delivery and a great price. I paid a couple gardeners at our condo that much to carry a small sewing cabinet from the back of our little station wagon in the garage into our condo. Post pictures of your progress.
Jerry
RE: Just picked up a 41-295 - LASJayhawk - 10-24-2015
So I finally got around to it.someone had recapped the audio section maybe 30 years ago. 2 electrolytics had been replaced in the last 10 years, and one maybe in the 70's.
I rebuilt the dial lamp sockets ( thanks a thousand times over Ron) and fired it up. Dead. Replace the paper caps in the RF section and tried again. Dead. Troubleshoot and find the 330K resistor to the plate of the 7C6 open. Replaced. IT'S ALIVE!!!.
RE: Just picked up a 41-295 - LASJayhawk - 10-25-2015
Ron, can you move this thread to the Electronic Restoration Phorum, or should I start a new one?
3 problems:
The power switch is flakey. I should be able to replace it like Ron did on the sled.
The output transformer has been replaced with a Merrit A-2904. Speaker is hooked to 2 and 5. Is this anywhere near a good fix?
The speaker ( 36-1515-4) has been reconed... With a 12" cone. It's distorting on heavy bass even at low volumes. Ideas?
RE: Just picked up a 41-295 - klondike98 - 10-25-2015
Moved to Electronic Restoration section.
RE: Just picked up a 41-295 - John R - 10-26-2015
(10-25-2015, 07:05 PM)LASJayhawk Wrote: The output transformer has been replaced with a Merrit A-2904. Speaker is hooked to 2 and 5. Is this anywhere near a good fix?
The Merit A-2904 is rated at 18 watts-plenty sufficient for the P-P 42's in the 41-295. Don't have a spec. sheet for the Merit transformer showing the taps but you can refer to this for determining what the primary/secondary impedance should be somewhat close to for this set;
http://www.radioremembered.org/outimp.htm
P-P 42's have about 10K ohms plate to plate Z. Measure your voice coil/hum bucker coil resistance and multiply by 1.25 to get an approximate Z match for the secondary. Mine measured about 4.5 ohms or about 5.6 ohms Z.
Then any where between 4-8 ohms tap on the secondary should work. This assumes you have the tapping diagram which I do not. The Merit A-2904 according to some on-line data has primary taps of 4k, 7k, 8k, 10k, & 14k. and secondary taps from .17 ohm to 32 ohms.? Don't know which wire numbers may be correct but you can experiment if needed for best sound if you don't have the tapping diagram.
Quote:The speaker ( 36-1515-4) has been reconed... With a 12" cone. It's distorting on heavy bass even at low volumes. Ideas?
Was the cone replaced by speaker shop? Make sure the speaker is firmly attached to the mounting board. Probably not the voice coil rubbing but you may want to check this. Could be many things including tubes, components especially capacitors causing low freq. distortion. Have you recapped and checked all the carbon resistors for value? Found many in my 41-295 that were considerably off value so I finally replaced them all.
Good luck, John
RE: Just picked up a 41-295 - LASJayhawk - 10-26-2015
No taping diagram. It is a "fixed" primary side with 6 pins for the speaker side, i.e. It just sets the ratio primary to secondary. The speaker is hanging on the bench at the moment, ill take some pictures so you can see the recone job...
RE: Just picked up a 41-295 - LASJayhawk - 10-26-2015
Photo
[Image: http://i1365.photobucket.com/albums/r745/LASJayhawk/image_zpstaze5snv.jpeg]
RE: Just picked up a 41-295 - LASJayhawk - 11-01-2015
So I've continued on the recapping of it. Since it plays I've been changing one at a time. Replaced a .005 (.0047) between one of the 37's and a 42 and it went to ****. Bad new cap. It was one of the white ones from Mouser that I've had nothing but trouble with.
One interesting thing is both of the 7A4's and 7B7's test closer to dead than good, but the radio has great ears just using 1' of wire on terminal 2. I should stick in the cabinet and see how it does on the loop.