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

Thread Closed

Philco 37-690
#27

It's been a while...still things to do around the house, new kitten, etc., etc. ...but in between all that, I've slowly been rebuilding the 37-690 amp chassis.

It is almost finished!

Rebuilt electrolytics, rebuilt bakelite blocks, new resistors.

The 3000 ohm section of the voltage divider resistor (177), a dual 3000 ohm / 2240 ohm Candohm, had failed at some point in the past. Someone bridged a 3000 ohm resistor across the terminals of the 3000 ohm section of (177). Bridging resistors across failed Candohms can be disastrous, so both sections have now been replaced with 50 watt chassis mount resistors. No doubt the 50 watt rating is overkill, but these should be good to go for the next few - if not the next several - decades.

The woofer and tweeter cables were very dry and crumbling, so I made new wiring harnesses for these.

I took a new photo of the underside of the chassis but Photobucket isn't working at present, so I'll post the photo later.

I'll try the set out over the upcoming three day July 4th weekend. If all works as it should, the next move is a full alignment, and then the set will be ready to go home. Icon_biggrin

--
Ron Ramirez
Ferdinand IN


Messages In This Thread
Philco 37-690 - by Ron Ramirez - 05-30-2014, 08:22 PM
RE: Philco 37-690 - by morzh - 05-30-2014, 08:31 PM
RE: Philco 37-690 - by Eliot Ness - 05-30-2014, 08:42 PM
RE: Philco 37-690 - by morzh - 05-30-2014, 09:16 PM
RE: Philco 37-690 - by Ron Ramirez - 05-30-2014, 09:29 PM
RE: Philco 37-690 - by Eliot Ness - 05-30-2014, 09:41 PM
RE: Philco 37-690 - by morzh - 05-30-2014, 10:49 PM
RE: Philco 37-690 - by Arran - 05-31-2014, 02:10 AM
RE: Philco 37-690 - by Eliot Ness - 05-31-2014, 08:14 AM
RE: Philco 37-690 - by Joeztech - 06-01-2014, 08:58 PM
RE: Philco 37-690 - by Ron Ramirez - 06-02-2014, 05:32 AM
RE: Philco 37-690 - by Phlogiston - 06-02-2014, 09:45 AM
RE: Philco 37-690 - by Ron Ramirez - 06-02-2014, 09:53 AM
RE: Philco 37-690 - by Phlogiston - 06-02-2014, 12:04 PM
RE: Philco 37-690 - by morzh - 06-02-2014, 12:28 PM
RE: Philco 37-690 - by Phlogiston - 06-02-2014, 12:34 PM
RE: Philco 37-690 - by bfrohwein - 06-02-2014, 01:03 PM
RE: Philco 37-690 - by Phlogiston - 06-02-2014, 02:09 PM
RE: Philco 37-690 - by Ron Ramirez - 06-02-2014, 05:21 PM
RE: Philco 37-690 - by Phlogiston - 06-02-2014, 09:03 PM
RE: Philco 37-690 - by bfrohwein - 06-03-2014, 12:14 AM
RE: Philco 37-690 - by Eliot Ness - 06-03-2014, 09:10 AM
RE: Philco 37-690 - by Ron Ramirez - 06-13-2014, 08:11 AM
RE: Philco 37-690 - by y2kbruce - 06-13-2014, 03:09 PM
RE: Philco 37-690 - by morzh - 06-13-2014, 03:10 PM
RE: Philco 37-690 - by Ron Ramirez - 06-13-2014, 03:59 PM
RE: Philco 37-690 - by Ron Ramirez - 07-01-2014, 09:28 PM
RE: Philco 37-690 - by Arran - 07-01-2014, 11:44 PM
RE: Philco 37-690 - by Ron Ramirez - 07-02-2014, 05:31 AM
RE: Philco 37-690 - by jerryhawthorne - 07-02-2014, 03:37 PM
RE: Philco 37-690 - by Ron Ramirez - 07-03-2014, 10:58 PM
RE: Philco 37-690 - by morzh - 07-03-2014, 11:19 PM
RE: Philco 37-690 - by Ron Ramirez - 07-04-2014, 11:45 AM
RE: Philco 37-690 - by morzh - 07-04-2014, 12:40 PM
RE: Philco 37-690 - by Ron Ramirez - 07-05-2014, 07:29 AM
RE: Philco 37-690 - by morzh - 07-05-2014, 09:40 AM
RE: Philco 37-690 - by Ron Ramirez - 07-17-2014, 08:55 PM
RE: Philco 37-690 - by Mondial - 07-17-2014, 09:56 PM
RE: Philco 37-690 - by Ron Ramirez - 07-18-2014, 05:51 AM
RE: Philco 37-690 - by Mondial - 07-18-2014, 06:43 AM
RE: Philco 37-690 - by Ron Ramirez - 07-18-2014, 07:26 AM
RE: Philco 37-690 - by Ron Ramirez - 07-18-2014, 07:30 AM
RE: Philco 37-690 - by Mondial - 07-18-2014, 08:02 AM
RE: Philco 37-690 - by morzh - 07-18-2014, 09:10 AM
RE: Philco 37-690 - by Ron Ramirez - 07-18-2014, 10:00 AM
RE: Philco 37-690 - by Phlogiston - 07-18-2014, 10:01 AM
RE: Philco 37-690 - by Mondial - 07-18-2014, 03:12 PM
RE: Philco 37-690 - by morzh - 07-18-2014, 04:03 PM
RE: Philco 37-690 - by y2kbruce - 07-18-2014, 05:37 PM
RE: Philco 37-690 - by Ron Ramirez - 07-18-2014, 05:48 PM
RE: Philco 37-690 - by morzh - 07-18-2014, 06:33 PM
RE: Philco 37-690 - by Ron Ramirez - 07-18-2014, 07:21 PM
RE: Philco 37-690 - by Ron Ramirez - 07-20-2014, 09:16 PM
RE: Philco 37-690 - by Ron Ramirez - 07-21-2014, 07:21 PM



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 1777 online users. [Complete List]
» 1 Member(s) | 1776 Guest(s)
Avatar

>