Need some ideas on a fix..
Posts: 761
Threads: 56
Joined: Jul 2013
City: Kentucky
I'm repairing a Delco radio. The tuning mechanism works off of friction between the tuning shaft and a large metal wheel. I think originally there must have been rubber on the edge of the large metal wheel, and it's gone. There is about a 1/8th inch gap between the little rubber piece on the end of the shaft and the metal wheel.
Any ideas on how I could make this work again? Here are some photos...
I'm thinking I need to glue something on the wheel so there is contact with the shaft, but what? Or perhaps there is a way to adjust the wheel and move it outwards so it contacts the shaft? Anyone ever seen one of these before?
The artist formerly known as Puhpow! 8)
(This post was last modified: 09-05-2013, 05:24 PM by Jamie.)
Posts: 30
Threads: 0
Joined: Jun 2013
City: Las Vegas NV
Try pushing the shaft in and turning. It looks to be spring loaded. If it won't push far enough then the rubber tip on the shaft might be worn.
keithw
Posts: 761
Threads: 56
Joined: Jul 2013
City: Kentucky
I tried pushing. It makes contact, but it just spins. It's like a bald tire..lol.. You can even see black rubber marks on the metal wheel. I may try to glue some scrap leather around the rubber cap on the shaft.
The artist formerly known as Puhpow! 8)
Posts: 481
Threads: 18
Joined: Jan 2013
City: Mesa, AZ
Is there a set screw in the center of that rubber cone, like an old faucet washer assembly? (Hard to tell from the pictures). That would be ideal. If no screw, then maybe it just pops off? ![Icon_confused Icon_confused](https://philcoradio.com/phorum/images/smilies/icon_confused.gif) :
Posts: 594
Threads: 41
Joined: Aug 2010
City: Shepherdsville, KY
IF you put a new rubber wheel on the small shaft it should not touch the big wheel until you push the shaft in to tune it. If the rubber touches the big wheel the push buttons won't work I think. I think you need to push the shaft in to tune it manualy. At least that is what I think
Joe
Joe Bratcher near Louisville, KY
Posts: 761
Threads: 56
Joined: Jul 2013
City: Kentucky
Nope, no set screw and the cap wouldn't come off. I glued some leather around the rubber cap and it seems to be working fine. (The Mrs gets credit for the idea).. Here are some pics..
and here it is.. all finished and playing Tube Talk! I am very impressed with the quality of this radio. It is a nice unit and well made. Sounds great. The first Delco I've ever worked on.
The artist formerly known as Puhpow! 8)
Posts: 15,444
Threads: 539
Joined: Oct 2011
City: Jackson, NJ
You could coat the wheel with some liquid rubber and let it polymerize......or take a piece of a rubber band and stretch it over that piece of leather...nice looking radio.
(This post was last modified: 09-05-2013, 10:28 PM by morzh.)
Posts: 761
Threads: 56
Joined: Jul 2013
City: Kentucky
I wonder if liquid tape would've worked better than the leather? I'm concerned about the longevity of the leather fix.
The artist formerly known as Puhpow! 8)
Posts: 1,107
Threads: 88
Joined: Jun 2011
City: Tacoma
State, Province, Country: Washington
My fix for this would be an appropriately sized rubber grommet. It could possibly be friction fit over the old rubber, or glued with something like contact cement if needed.
Posts: 4,369
Threads: 410
Joined: Jun 2011
City: Boston
State, Province, Country: Massachusetts
Perhaps a rubber washer that could be trimmed to fit? Delco, American Motor Services..nice radios. I have a nice Delco, plays well, fairly sensitive.
Good luck.
Paul
Tubetalk1
Posts: 1,562
Threads: 56
Joined: Nov 2008
City: Sedona, AZ/Placentia/CA
Did one a few years ago and yes, the faucet washer did the trick. As I recall in needed a couple layers of heat shrink over the bare shaft to build up the OD such that the washer would press on.
Jerry
A friend in need is a pest! Bill Slee ca 1970.
Posts: 761
Threads: 56
Joined: Jul 2013
City: Kentucky
I'll swing by the hardware store this weekend and grab an assortment of grommets and rubber washers. The leather is working fine, I'm just afraid it won't last long.
It's a real nice radio. Everything seems solid and designed to last. I had to search high and low to find a schematic. Delco went by United Motors, and that's where schematics are in the Riders. It was seriously out of alignment at first. It barely got one station in two places on the dial and that was it. Once it was aligned, it sure started to sing.
That's the original finish, with one coat of clear Mohawk applied. I also repainted the dark brown trim. Just flipped the grill cloth around. I wish I'd photographed it before I began to work on it. I thought for sure it would need to be stripped. There was white paint on the top, and 70 years of black grunge covering everything else. I think it may have been a shop radio in a garage. It always amazes me how well some of these clean up.
Thanks to everyone for the rubber grommet/washer ideas.
The artist formerly known as Puhpow! 8)
(This post was last modified: 09-06-2013, 01:33 PM by Jamie.)
Posts: 2,128
Threads: 18
Joined: Oct 2008
City: Merrick, Long Island, NY
ORing shaved down would also be OK. Whatever.
Posts: 1,562
Threads: 56
Joined: Nov 2008
City: Sedona, AZ/Placentia/CA
Those faucet washers have a very close shape to the drive wheel. As I recall I did have to do a little shaping on the tip to "dull" it a little with the washer on an electric drill and spinning with a little sandpaper.
Jerry
A friend in need is a pest! Bill Slee ca 1970.
Users browsing this thread: 2 Guest(s)
|
Recent Posts
|
bridkarl
|
I have two PT-6 chassis. On both there is a blue wire that runs from the above chassis transformer to pin 6 of 7C6. So t...bridkarl — 07:23 PM |
Cannot Adjust an IF Transformer’s cores
|
Joseph, now you are an engineer!!RodB — 06:37 PM |
PT-6 antenna connections
|
Hi, reading your explanation I can see the confusion. If you take it one connection at a time it should result in a desi...RodB — 06:34 PM |
Cannot Adjust an IF Transformer’s cores
|
It works! I received the PCBs this morning in the mail, and put everything together. I reused the base from the original...jrblasde — 04:32 PM |
PT-6 antenna connections
|
I seem to have lost my way on this PT-6.
I see the antenna aerial transformer schematic - I’m reading pins 1 through ...bridkarl — 12:30 PM |
40-150 General questions
|
Good thing you're a good electrician ... the pictures show a lot of rewiring in your future! Take care and BE HEALTHY!...GarySP — 11:52 AM |
40-150 General questions
|
I think RobB has it right. It is a part number and looks like its stamped on the chassis and that wasn't something you ...klondike98 — 11:41 AM |
40-150 General questions
|
It's most likely a part number. Most of Philco part numbers are in that format. I looked at the parts list for this mode...RodB — 08:10 AM |
40-150 General questions
|
Hi Kevin,
No, I don't but I like your Quote about being a good electrician. The way I look at it is "The fact ...MrFixr55 — 08:06 AM |
Philco 38-7 Speaker
|
7K should be fine. While not a perfect match (This transformer is meant for 6V6 tubes), Antique Electronic Supply (AES)...MrFixr55 — 08:03 AM |
Who's Online
|
There are currently 2996 online users. [Complete List] » 2 Member(s) | 2994 Guest(s)
|
|
|
![>](https://philcoradio.com/phorum/images/bootbb/asb/right_arrow.png)
|