Posts: 2,023
Threads: 365
Joined: Jun 2010
City: Dover, OH
Hit a bit of a snag. The radio was all ready to go, but we were getting incorrect voltages and the tubes were very dim. After ruling out the input transformer and retesting the tubes, it turned out one of the NOS 48s is shorted out! Now, I just hope that old store in town has one more hidden upstairs...
No matter where you go, there you are.
Posts: 2,353
Threads: 92
Joined: May 2010
City: Clayton, NC
Usually when you find a 32V set it's in pretty decent shape. EXCEPT for the "plugging it into 120V AC" problem....
EVERY 32V set that I have ever owned had this problem. For the sets that used the 32V for B+ and suppressor grid, the damage was correctable although most or ALL tube filaments were open......
The one set that thus far has been unrepairable was my Philco 32 Tombstone.
Philco used a unique 32V vibrator that provided "AC" to the transformer and 84 rectifier. The tube filaments,except for the 84 tube, were in series with the 32V. The rest of the set was very similar to a model 89.
When a previous owner plugged the set into a wall socket, they FRIED the vibrator in addition to the tube filaments.
Try finding a 32V vibrator.......
Posts: 1,107
Threads: 88
Joined: Jun 2011
City: Tacoma
State, Province, Country: Washington
Posts: 4,686
Threads: 51
Joined: Sep 2008
City: Sandwick, BC, CA
It seem strange that a shorted tube would cause that problem, grid to pate or cathode to grid short? I would have thought maybe a shorted bypass capacitor rather then that, or the tone correction cap across the output transformer.
Regards
Arran
Posts: 2,353
Threads: 92
Joined: May 2010
City: Clayton, NC
Brenda: HOLY CRAP !!!!!!!!!
I saved that one and will see if it might work with my set.
The 32V vibrator in the model 32 is a large can with leads coming out, not a "plug in" like the one in eBay. BUT beggars (me) can't be choosers, can we?? I would LOVE t get my 32 playing again.
Arran: no, the tube filaments in all the 32V sets were open, with the usual collateral damage to other components in the set. I did not measure any other tube damage as the point was moot, but would not be surprised if there was other inter-element tube damage. In the Philco the damage was a bit more dramatic, as the "points" of the vibrator were literally melted off!!!
Posts: 240
Threads: 27
Joined: Jun 2013
City: Boulder, Colorado
Hi All;
Its truely Amazing what 120 volts can do to a non 120 volt set !!
THANK YOU Marty
Posts: 2,023
Threads: 365
Joined: Jun 2010
City: Dover, OH
Well, I lucked out. The old TV shop had two more 48's left burried on one shelf and I nabbed both. Hopefully neither of these are shorted like the last one I bought was. Radio is ready to go except for that one new 48 shorting!
No matter where you go, there you are.
Posts: 240
Threads: 27
Joined: Jun 2013
City: Boulder, Colorado
Hi Jayce;
I have One #48, If you want or need another one, I have NO use for the one I have..
THANK YOU Marty
Posts: 2,353
Threads: 92
Joined: May 2010
City: Clayton, NC
Hello, Jay: I may have one too, will check....
Posts: 2,023
Threads: 365
Joined: Jun 2010
City: Dover, OH
Thanks! There might be a tombstone version of my radio in the future for me, so I will keep you both in mind if I get it.
No matter where you go, there you are.
Users browsing this thread: 1 Guest(s)
|
Recent Posts
|
Philco 91 Speaker Replacement
|
I can't remember, but there was a particular product for loosening glue on the more modern "spiders", used pos...MrFixr55 — 09:43 PM |
Philco 91 Speaker Replacement
|
The spider is glued on the cone and so is the voice coil. I think you can use a cotton swab dipped in acetone and carefu...RodB — 02:42 PM |
Restoring Philco 37-604C
|
Yes I saw that. If I knew, I'd probably try to arrange for getting it myself. But I have just got one.
Which does not m...morzh — 01:44 PM |
Philco 38-2 Automatic Tuning
|
When you push the lever, you are supposed to rotate the disk to the desired station.
Then the magnetic tuning will acqu...morzh — 01:42 PM |
Philco 38-2 Automatic Tuning
|
I figure out the muting from another picture that helped. Now I need to know how the automatic tuning works. When I push...dconant — 12:11 PM |
Philco 91 Speaker Replacement
|
How would I go about removing the spider from the cone?dconant — 12:04 PM |
Philco 38-2 Automatic Tuning
|
Hello, I am having trouble getting my automatic tuning to stay unmuted. If I play with the tuning handle I can get it to...dconant — 10:51 AM |
Does anyone make photofinish replacements?
|
Here’s the link to the DIY photofinish section of our site:
klondike98 — 09:46 AM |
Delco car radio Peko vibrator converstion issues
|
Hi Richard,
Thx for posting the schematic. As I remember as a kid, these were great performers for the time, likely...MrFixr55 — 08:56 AM |
Delco car radio Peko vibrator converstion issues
|
hello mr Fixr,
The Electro Powersupply that I am powering the radio with has a huge choke plus a 10,000ufd electrolyti...radiorich — 10:58 PM |
Who's Online
|
There are currently 1943 online users. [Complete List] » 1 Member(s) | 1942 Guest(s)
|
|
|
|