1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration

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

Thread Closed

Linear Mode
Philco 40-180 - Resistor Burnout
wtoeller
Junior Member
**
Posts: 8
Threads: 1
Joined: Apr 2019
City: Germantown State, Province, Country: Maryland
#12

12-16-2021, 06:13 PM
Rob - you are correct. There are no other 150 ohm resistors in the schematic besides the cathode bias resistor. I currently have 6 of these radios and they all have this 'extra' 150 ohm resistor where I indicated! I can only speculate that it was a mid-stream manufacturing change that did not get into the schematic, or, the schematic I have is an earlier (or later) version then what my radios have.

Someone smarter than me will have to deduce why this design was implemented.
Find
« Next Oldest | Next Newest »
Thread Closed


Messages In This Thread
Philco 40-180 - Resistor Burnout - by wtoeller - 12-15-2021, 06:54 PM
RE: Philco 40-180 - Resistor Burnout - by Mondial - 12-15-2021, 09:43 PM
RE: Philco 40-180 - Resistor Burnout - by Mondial - 12-16-2021, 10:25 AM
RE: Philco 40-180 - Resistor Burnout - by RodB - 12-16-2021, 02:42 PM
RE: Philco 40-180 - Resistor Burnout - by Mondial - 12-16-2021, 06:08 PM
RE: Philco 40-180 - Resistor Burnout - by wtoeller - 12-16-2021, 06:13 PM
RE: Philco 40-180 - Resistor Burnout - by Mondial - 12-16-2021, 06:20 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
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
Preliminary work on wife's Silvertone 2014
Hello roy, that great news glad it worked out for you !! Sincerely Richardradiorich — 10:50 PM
Preliminary work on wife's Silvertone 2014
Safety caps arrived today.  Soldered one in and had a successful first power-up.  No magic smoke escaped and it tunes in...glyphmon — 09:53 PM

[-]
Who's Online
There are currently 1613 online users. [Complete List]
» 1 Member(s) | 1612 Guest(s)
Avatar

>
  1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration