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

52-540 tuner
#1

I received this radio and original condition and it was not working. After replacing the capacitors and one weak tube, I now have it playing.. my question has to do with the tuning condenser.. the tension on the dial string pulls it downward so that the large pulley is rubbing on another metal object. See photograph with green arrow. This means that, when I turn the tuning knob, the string just slips and the tuning condenser does not rotate. Using a screwdriver or similar tool I can lever the tuning condenser up, allowing me to operate the pulley, but when I stop pushing with the screwdriver, the string tension pulls the shaft back down. The assembly seems to float within the frame.. What do I need to do to put this back into good operating condition?


Attached Files Image(s)
   
#2

Is it mounted up on rubber grommets? Could be they are shot.

When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!

Terry
#3

Quite often the tuning condenser is mounted on rubber grommets and the grommets are usually dried out or worn flat. I usually replace them with firm rubber grommets to limit movement yet get the isolation.
#4

Thanks, guys. Turns out there are rubber grommets involved, but they are on the sides of the condensor, not the bottom. See brown objects in photos. P all three of these rubber mounts are turning into powder. Acc to the schematic, they are part number 27-4771-1
Any ideas for a good replacement?


Attached Files Image(s)
       
#5

You might check these out: http://www.renovatedradios.com/product.php?product=313  Double check the sizes to see if it is suits your needs. If not have a look around the site maybe there is something that will. GL

When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!

Terry
#6

Thanks GL




Users browsing this thread:
[-]
Recent Posts
Need to purchase some accessories for restoration of my Old Philco Radio
Here is a list of resources found in our online library that you might find useful. Mike's Gobs of Knobs email addres...klondike98 — 01:46 PM
First Radio restoration
Hi Tubeman, Welcome to the Philco Phorum.  Phamily Phriendly Pfun with Phine Pholks Phull of Philco Phacts. (See a p...MrFixr55 — 12:33 PM
First Radio restoration
You could post in the WANTED ADs section here on the Phorum and see if anyone has an RF generator that they want to sell...klondike98 — 11:55 AM
Zenith H725
Good ideas, thank you Arrange and Rich. I have the adhesive aluminum foil already and can try that immediately. More ...EdHolland — 10:18 AM
Graphics for majestic 1050 dial glass.
Murf; I found this thread on the ARF, the first photo has a pretty good view of the dial glass. Regards ArranArran — 01:12 AM
Zenith H725
hello Ed, how about that speacial tape used for ducting it's like foil or how about thin piece of aluminum roof flash...radiorich — 12:19 AM
Zenith H725
Ed; One material that I have seen, but never tried for this was material for making exhaust gaskets, it's similar to ...Arran — 11:42 PM
Zenith H725
I just remembered, I have some hi temp silicone rubber material which could do the trick. Or a piece of FR4 laminate. Th...EdHolland — 08:39 PM
Zenith H725
The PSU filter cap arrived today (thank you USPS!) so I will work on that later. Meanwhile, I have the dial, speaker...EdHolland — 06:42 PM
Philco 610B oscillator wiring
Thanks Terry. After checking my notes I think I recorded about -10v at the 6A7 G4/control grid. The screen grid (G3 &...Tubester — 05:59 PM

[-]
Who's Online
There are currently 2641 online users. [Complete List]
» 2 Member(s) | 2639 Guest(s)
AvatarAvatar

>