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

38-690 Missing amp and 14" woofer
#9

I have located replacements for the missing tube shields. I found that I had a couple scrap Philco chassis that had the correct shields. These were painted with the same silver paint as the others. I pulled all the tubes, and cleaned off the dirt with a damp rag. ( Water only-no detergents or soap to avoid washing away the the numbers on the glass. ) 3 tubes are missing. I tested all the tubes I have.(TV-7D/U Tester) All are good except the diode sections on the 6B8 and 6R7 tubes. These read quite a bit low. I wonder if the tube tester is accurate as the pentode and triode sections show well above the specified reading. I own a Hickok tube tester, and will retest these tubes on it. The top dial light socket was broken where it attached to the bracket that held it. This was repaired with a piece of brass tubing that was completely flattened at one end, and the rest of it was flattened only enough to allow it to slide onto the mounting bracket. A hole was drilled at the completely flattened end, and a hole was drilled in what was left of the sockets broken off part. There is a small dimple where I center punched and drilled a hole. The completely flattened tubing end was attached with a 4-40 screw. At the transition between completely flattened, and partially flattened tubing, it was bent 90 degrees. The partially flattened end now slid onto the original bracket. The amount of flattening is adjusted to give a snug fit.


Messages In This Thread
38-690 Missing amp and 14" woofer - by peteivan - 10-31-2012, 02:01 PM
RE: 38-690 Missing amp and 14" woofer - by Arran - 10-31-2012, 10:27 PM
RE: 38-690 Missing amp and 14" woofer - by peteivan - 11-07-2012, 12:37 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Need to purchase some accessories for restoration of my Old Philco Radio
Hi Paulo, Welcome to the Philco Phorum. I can see why you want to find good reproduction parts. That is a bea...MrFixr55 — 11:10 PM
HiFi (Chifi) tube amp build - but my own design.
Tim, I have some bakelite sockets in my work shop that I can dig up. I believe quite a few are NOS. I will take photo...RodB — 10:03 PM
Philco 610B oscillator wiring
> The cathode as noted is wired directly to the ground side of the heater filament for that tube, not to the #17 and ...Radioroslyn — 08:12 PM
HiFi (Chifi) tube amp build - but my own design.
Tim; I noticed your post a little late, but I would take one of the junk sockets and try to break a chunk out of it wi...Arran — 08:07 PM
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

[-]
Who's Online
There are currently no members online.

>