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

Philco 620 restoration
#4

Many times resistors are very out of tolerance, usually high. I measure all the resistors with one lead de-soldered so other components are clearly out of the circuit. If they are more than 10% or so out of tolerance I replace them.

I think other people use 20% as the limit for resistors. I'm not sure how much it matters whether you use 10% or 20% as the limit, because I have taken resistors that were 200% or 300% high out of old radios that seemed to be working fine. I hope others will weigh in with opinions on this as I am really not sure what is the best approach. Possibly a resistor that has gone out of tolerance will continue getting worse.

Some resistors are exactly the right value after 50 years, but others have changed a lot. In the radio I am recapping now, a 42-350, almost every resistor is 20% or more high, so I am replacing almost all of them. This one will definitely not look original inside when I am finished.

A question on recapping for the more experienced restorers: how many of you re-stuff the wax/paper capacitors? Do any of you consider it essential for authenticity?

I always re-stuff the bakelite caps. They are a snap. It isn't a snap to re-stuff all the metal 'lytics on the top side of the chassis, but I do it whenever possible. Sometimes 3 or 4 modern lytics won't fit in the can. On my current project I re-stuffed both of the cardboard-bodied 'lytics even though they don't show. I haven't yet started to re-stuff the wax/paper capacitors. I put all of them in a big box, though, just in case I develop a passion for absolute authenticity someday.

John Honeycutt


Messages In This Thread
Philco 620 restoration - by David B - 01-21-2008, 08:55 PM
What constitutes a "restoration" - by AI2V - 01-22-2008, 12:41 PM
Philco 620 - by David B - 01-22-2008, 09:17 PM
[No subject] - by Raleigh - 01-22-2008, 11:16 PM
[No subject] - by Raleigh - 01-22-2008, 11:31 PM
[No subject] - by gary rabbitt - 01-23-2008, 12:12 AM
Resistors next - by AI2V - 01-23-2008, 10:18 AM
[No subject] - by gary rabbitt - 01-23-2008, 05:36 PM
Philco 620 - by David B - 01-27-2008, 02:04 AM
[No subject] - by Guest - 02-28-2008, 06:55 PM
[No subject] - by Texasrocker - 02-29-2008, 02:03 AM
[No subject] - by gary rabbitt - 02-29-2008, 04:53 AM
[No subject] - by Ron Ramirez - 02-29-2008, 10:17 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 546 online users. [Complete List]
» 1 Member(s) | 545 Guest(s)
Avatar

>