Philco 38-690 electronics restoration. - 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: Philco 38-690 electronics restoration. (/showthread.php?tid=16528)
+- 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: Philco 38-690 electronics restoration. (/showthread.php?tid=16528)
RE: Philco 38-690 electronics restoration. - sam - 06-15-2017
Aw come on it about 1/2 hr from me could stop in and say hi
Sam
RE: Philco 38-690 electronics restoration. - Kenneth F. Besso Jr. - 06-15-2017
YES,,,I understand the reasoning,,,,A Lot of time that could be used elsewhere,,,,I don't blame you,,,, Cheers
RE: Philco 38-690 electronics restoration. - morzh - 06-15-2017
Sam
Lucky you.
If I knew hen you are home I would.
How bout yous two drop by? The pool's open, the beer's cold, the pool table's ready for action.
RE: Philco 38-690 electronics restoration. - sam - 06-15-2017
Well one out of three not bad
Will bring my beer and no pool thank you. pool table ok
Some day when Im Not working
Sam
RE: Philco 38-690 electronics restoration. - Radioroslyn - 06-16-2017
See ya in a couple of years!!![Image: http://philcoradio.com/phorum/images/smilies/icon_lol.gif]
RE: Philco 38-690 electronics restoration. - morzh - 06-16-2017
Sam, you party-pooper you.
Terry
He means retirement.
RE: Philco 38-690 electronics restoration. - morzh - 06-16-2017
Rich called, said he has no 14" cones and he's not aware of anyone making them. Suggested a ring and a 12" cone.
I suggested a patch, as he of all people could make it well, he agreed.
The tweeters he said are ok to recone.
RE: Philco 38-690 electronics restoration. - morzh - 06-30-2017
Speakers came from Sound Remedy. Rich did a great job plus he patched my woofer for free, only having charged me $80 for the two tweeters reconing.
Now the transformers. Promised by Heyboer for the mid-July or so.
RE: Philco 38-690 electronics restoration. - Arran - 06-30-2017
Mike;
At least tire valve stems are cheap to replace, of course you have to dismount the tire from the rim to replace it normally.
With regard to the interstage transformer, does this set use a class A-B power amp, with a third triode driving it, a pair of triodes driving it, or is it a class A amp?
Regards
Arran
RE: Philco 38-690 electronics restoration. - morzh - 07-01-2017
The interstage has to be CLASS A, as it is one pentode 6F6 driving the primary of the transformer which in turn drives the 6L6 pushpull and the tweeters directly.
As for the tire valve, no it ain't cheap, it is the whole assembly for the pressure sensor. Aftermarket is $90 apiece, which is what I did, otherwise OEM in my dealership is $200 apiece.
RE: Philco 38-690 electronics restoration. - morzh - 08-01-2017
I need some break.
Not sure why I am being punished but both transformers came.....incorrect.
I will call them tomorrow, and will or will not publish the results pending their willingness to remedy the situation.
It took 1-1/2 month and.....this.
Sigh.
RE: Philco 38-690 electronics restoration. - morzh - 10-20-2017
I shipped the transformers on 6/13. Today it's been the 3d try to fixing them.
Sigh.
Been 4 months.
Good grief.
The output transformer still has the centertap leaded and one plate lead goes to the fuse. How'm I gonna solder to it?
OK, I'll short the fuse and put an nline fuse to the CT.
I am very sad. It's been three (3) shipping back and forth. I ain't shipping for the 4th time.
RE: Philco 38-690 electronics restoration. - Arran - 10-20-2017
Mike;
Time to go to contact Edcor and see about ordering a new one from them, it won't look the same but the impedances will probably be correct. If they have to build a custom transformer they will apparently refund the engineering charge if they find the specs for your transformer on file.
Regards
Arran
RE: Philco 38-690 electronics restoration. - morzh - 10-21-2017
Arran,
That's the thing: I do have a transformer I bought for mere $20 or so, a 20W rated 4 ohm to 6,600 ohm PP.
I was hoping to install the original. And....I guess (now that they got the impedance straightened out after 3rd try) I could uee it, but soldering won't be nice.
I think I will suggest tbis xfmr being discounted, as I spent over $40 just for shipping.
RE: Philco 38-690 electronics restoration. - morzh - 10-28-2017
OK. It lives!
Last Sunday I installed the interstage (guess what, the wire colors were correct!) and today I installed the output xfmr. Yes it is ugly as I had to solder external inline fuse.
Then attached the tweeters, the woofer. Thought of powering up tomorrow but decided today. It took it about over a minute if not two to warm up: while some reaction was there when touching the grid caps, a full fleged hum appeared after that much time. And then I pulled the local station loud and clear. No music so cannot judge the tweeters and the quality but the speech is good.
More tomorrow.