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

Thread Closed

Philco 37-670 restoration thread
#14

Ted
Basic ohms law comes into play here. looks like The candohm #83  is the one you are talking about
I just did the same thing on a 38-10 I have been working on.
It's being use to create the negative bias voltages and it's carrying all the current of the power supply. 

This radio has a lot going on so it's going to use a lot of current with push pull output and driver tubes.
The book states that typical current for that rectifier tube is 250MA.
 So the small resistor sections 22 and 18 ohm I would use 2 watt resistors and the 146ohm section I used a 20 watter. There going to get hot.

Once you get it up and running be sure to measure the voltage drops and figure the power being dissipated in each.

I was told to always double the size of the resistor for the wattage calculated.

I should defer here to the more experienced wizards of the phorum.

Good luck

!!!!!!!!!!!!!!!!!!!RESISTANCE IS FUTILE!!!!!!!!!!!!!!!!!!!!!!  
                           /\/\/\/\/\/\/\/\/\
                                                     
                                 [Image: http://philcoradio.com/phorum/images/smi...on_eek.gif]  Chris


Messages In This Thread
Philco 37-670 restoration thread - by Diverted - 12-30-2014, 03:55 PM
RE: Philco 37-670 rectifier - by millievolt - 12-30-2014, 04:25 PM
RE: Philco 37-670 rectifier - by Diverted - 12-30-2014, 05:03 PM
RE: Philco 37-670 rectifier - by Chuck Schwark - 12-30-2014, 04:28 PM
RE: Philco 37-670 rectifier - by millievolt - 12-30-2014, 04:33 PM
RE: Philco 37-670 rectifier - by morzh - 12-30-2014, 06:27 PM
RE: Philco 37-670 rectifier - by Diverted - 12-30-2014, 07:45 PM
RE: Philco 37-670 rectifier - by OZ4 - 12-30-2014, 08:14 PM
RE: Philco 37-670 rectifier - by Diverted - 12-30-2014, 08:35 PM
RE: Philco 37-670 rectifier - by OZ4 - 12-30-2014, 09:10 PM
RE: Philco 37-670 rectifier - by thirtiesradio - 12-31-2014, 03:44 AM
RE: Philco 37-670 rectifier - by Arran - 12-31-2014, 04:54 AM
RE: Philco 37-670 rectifier - by Diverted - 12-31-2014, 09:03 AM
RE: Philco 37-670 restoration thread - by John R - 12-31-2014, 05:19 PM
RE: Philco 37-670 restoration thread - by OZ4 - 12-31-2014, 01:03 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
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
54C Complete Teardown/Rebuild
While I'm waiting to wrap up the final steps on my wife's Silvertone 2014, I started disassembly on the next project.  O...glyphmon — 11:07 PM

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

>