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

Thread Closed
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

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
Model 70 Cabinet Trim
musar , Well if you have any more questions feel free to post away . Sincerely Richardradiorich — 08:56 PM
Model 70 Cabinet Trim
Although I have not made any cabinets or cabinet parts for a couple of years, I still have some parts left over, includi...Steve Davis — 06:26 PM
philcorepairbench.com - shadow-meter
Thanks Ron.fenbach — 02:43 PM
Model 70 Cabinet Trim
Thank you, Gary. Before making my original post, I had clicked on "Steve Davis Cabinets" only to find that it...musar — 02:25 PM
philco predicta
Welcome to the Phorum, cgl18! I am not your resource for television repair, but lots of friendly help is available here...GarySP — 02:12 PM
Model 70 Cabinet Trim
Welcome to the Phorum, musar! You can send Steve Davis a private message (PM). The site is at the top of the Home page...GarySP — 02:09 PM
Model 70 Cabinet Trim
How do I contact him? The only contact information for him I could find when searching online was a telephone number th...musar — 10:38 AM
philco predicta
Hello, good afternoon, I would like to ask what the possible problem could be if I don't have an image on the screen. I ...cgl18 — 10:19 AM
Philco model 38 code 121 not receiving signal.
So one last question before I finish this radio. Regarding the speaker and output transformer. I salvaged the original o...Stormlord5500 — 09:31 AM
462ron
It’s on the bottom of the homepage of our Philcoradio.com homepage! Ron462ron — 07:20 AM

[-]
Who's Online
There are currently 445 online users. [Complete List]
» 2 Member(s) | 443 Guest(s)
AvatarAvatar

>