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

Thread Closed

New Philco project on the bench
#4

I've just about finished overhauling this set, it has been taking longer then I thought, but that's pretty normal when going back over someone else's work. The set seems to be from around 1949-50 according to the RCC manuals, but it looks like a Canada only wooden model using a similar chassis to the US Transitones, perhaps a model 520? I found a few bad resistors, the worst being a 69,000 ohm resistor supplying the screen grids of the converter and IF amplifier tubes, it was reading 530,000 ohms. I think that this may explain the low volume situation. I replaced the choke resistors in the power supply, one was a one watt 220 ohm resistor, the other a half watt 1200 ohm unit, replaced each with larger wattage resistors. I also replaced the plate resistor for the 14B6 while I was at it since it was next in line, it was reading 540,000 rather then 470,000 ohms, it won't make much difference in performance but it likely would have gone open at some point anyhow. So two more paper condensers to change, then the filter condensers, and we are onto alignment.
Happy New Year
Arran


Messages In This Thread
New Philco project on the bench - by Arran - 01-06-2009, 01:13 AM
Re: New Philco project on the bench - by Arran - 01-07-2009, 02:03 AM
Re: New Philco project on the bench - by Arran - 01-16-2009, 12:39 AM
Re: New Philco project on the bench - by Arran - 02-17-2009, 12:12 AM
Re: New Philco project on the bench - by Jim Berg - 02-18-2009, 02:33 PM
Re: New Philco project on the bench - by Guest - 08-04-2010, 09:18 AM



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 1640 online users. [Complete List]
» 1 Member(s) | 1639 Guest(s)
Avatar

>