Forums :: Resources :: Features :: Photo Gallery :: Vintage Radio Shows :: Archives :: Books
Support This Site: Contributors :: Advertise


It is currently Jun Thu 27, 2019 7:00 am


All times are UTC [ DST ]





Post New Topic Post Reply  [ 489 posts ]  Go to page Previous  1 ... 21, 22, 23, 24, 25  Next
Author Message
 Post subject: Re: Radio Restoration Diary 2 ( post photobucket)
PostPosted: Apr Tue 23, 2019 8:43 pm 
Member
User avatar

Joined: Dec Mon 08, 2008 8:27 pm
Posts: 9804
Location: alameda,CA
Hi Tom,
Its really hard to say what it might go for since its an auction. Yes- this is the more economical model and so its likely going to be for less than the 12 tube variations. We will be taking photos of it this Saturday and adding it to the auction catalog.


Top
 Profile  
 
 Post subject: Re: Radio Restoration Diary 2 ( post photobucket)
PostPosted: May Wed 01, 2019 4:50 pm 
Member
User avatar

Joined: Dec Mon 08, 2008 8:27 pm
Posts: 9804
Location: alameda,CA
Here's some more recent restorations.

1: This 1960 Telefunken " Rythemus". Late model tube table set using PCB boards.
Image

This radio had EVERYTHING wrong with it. Initial power up had one of the power resistors smoking and the Selenium rectifier getting hot. So that meant it would need replacement, which I did with a new silicone diode bridge unit. Interestingly enough for whatever reason the chassis was split into two with the tuner unit and power supply mounted on their own individual chassis.
Image

Upon testing again with rebuilt power supply the resistor still smoked and I could see that neither of the output tubes were getting filament. Testing both showed one of the tubes was shorted HARD. After replacing that the set came to life but it was clear that tapping the chassis would cause a serious short for the 6 volt filament section. The PCB board was riddled with dry solder joints and cracks. After spending an hour re-soldering most of the PCB this solved the shorting issue.

As with other nice sets, it too got a bluetooth unit installed feeding into the tape input.

Image

The brass was really corroded. So it was masked off an polished.
Image

2: This really ugly Motorola. But hey- it sounds great!
Image
Image

3: Zenith "Pancake". This was donated a year ago, was nasty and filthy looking with a crack in the right rear of the case. I guess I felt sorry for it. Recapped, re-aligned, and probably a few hours worth of polishing to bring back the bakelite. Knobs were soaked in solution of hot water and amonia to remove stains. Nice and sensitive set. Lots of rotten rubber wiring had to be replaced as a quite a bit of it was carrying significant current.
Image
Image
Image


Top
 Profile  
 
 Post subject: Re: Radio Restoration Diary 2 ( post photobucket)
PostPosted: May Wed 01, 2019 7:00 pm 
Member

Joined: May Mon 30, 2011 10:12 pm
Posts: 1401
Location: Glendale, CA
Bob,
Thanks for explaining about the output tube short being an issue that would cause this radio to go dead. I'm assuming that this radio had no fuse? Did the output tube short also cause the selenium rectifier to go bad as well or did the bad selenium rectifier cause the output tube to go bad? Or, are they not related to each other?
Thanks a lot, Tom

_________________
"A challenge to be met, rather than an obstacle to avoid." - Mr. Data


Top
 Profile  
 
 Post subject: Re: Radio Restoration Diary 2 ( post photobucket)
PostPosted: May Wed 01, 2019 7:32 pm 
Member
User avatar

Joined: Dec Mon 08, 2008 8:27 pm
Posts: 9804
Location: alameda,CA
The set actually had 3 fuses. One for the 120AC, one for the 6 volt winding of the transformer, the other I assume for the other winding. When tested nothing came on and so I jumpered the open fuse. It had done its job. Either way some sort of catastrophic event had happened.


Top
 Profile  
 
 Post subject: Re: Radio Restoration Diary 2 ( post photobucket)
PostPosted: May Wed 01, 2019 8:33 pm 
Member

Joined: May Mon 30, 2011 10:12 pm
Posts: 1401
Location: Glendale, CA
Thanks for the information, Bob.

_________________
"A challenge to be met, rather than an obstacle to avoid." - Mr. Data


Top
 Profile  
 
 Post subject: Re: Radio Restoration Diary 2 ( post photobucket)
PostPosted: May Thu 02, 2019 12:24 am 
New Member

Joined: Apr Tue 30, 2019 4:15 pm
Posts: 5
I love this thread. I'm hooked! I wish I got more involved when my aunt was getting rid of her collection.


Top
 Profile  
 
 Post subject: Re: Radio Restoration Diary 2 ( post photobucket)
PostPosted: May Mon 06, 2019 4:55 am 
Member
User avatar

Joined: Jan Thu 01, 1970 1:00 am
Posts: 2150
Location: Sandusky, OH usa
Bob, just spent last Sunday night going through all 24 pages of this thread and was amazed at the number of sets you have restored to functionality. I envy you the ability you have to be able to bring some of these basket case sets back from the brink. If I lived where you do I'd consider it a privilege to offer my time to the museum in helping restore these sets. Keep up the good work and keep us posted here on the forum!

_________________
"If at first you don't succeed, keep on succin' til you do succeed" - Curly

Dan


Top
 Profile  
 
 Post subject: Re: Radio Restoration Diary 2 ( post photobucket)
PostPosted: May Mon 20, 2019 4:09 pm 
Member
User avatar

Joined: Dec Mon 08, 2008 8:27 pm
Posts: 9804
Location: alameda,CA
Its been awhile since I posted stuff here. The honest truth is that we are ramping up for this year's Radio Day- our museum's big event in July- which means some 200 sets need to be either cleaned up, restored and otherwise made presentable. A lot of recent donations have come in. As poor of an excuse as this is I've simply forgotten to take pictures of some of the projects. But here are a few recent jobs.

No.1: A very large, 40 pound German set. Its a Nordemende "Tannhauser" which I think means something like " Big sounding house" or something along those lines. This was a recent donation that had sat in storage for 10 years. It was filthy.

Image

If I had to pick a brand that is my least favorite to work on it has to be this brand. For whatever reason Nordmende thought it was a great idea to mount components onto PCB boards, attach the boards to the chassis, and then wire them in. So that means that in many instances there is no way to remove the boards to get to the undersides without de-soldering the tons and tons of delicate wires from them. Its a really stupid design. The only way to deal with this is by snipping the old components off and leaving enough of the old leads in which to solder the new stuff to.

Image

The whole thing is built in layers and some parts can only be gotten at via using long hemostats or tools along those lines.

Image

This has many issues: Bad electrolytics, a short in the pilot lamp wiring, shorts in and around the EBF-89 tube, filthy contacts as a result of storage and two bad tubes. At one point FM was not working at all. While I had tested the ECC85 tube that tends to get "poisoned" in these German sets that same tube wound up failing between testing it, overhauling the set and testing again. I assumed there was a short in there somewhere and after hours of poking and prodding I handed it to another shop tech, who promptly tested the ECC85 and found it to be bad.... Annoying.

But it now works. It is a elaborate set with actual, true FM stereo, 6 speakers and numerous tone options.
Image

Sorry, I forgot to take pics of the innards, but this 1946 era Philco. It has its original finish, brought out and made shiny once more with 4-5 applications of car wax:

Image

A Zenith "Consoltone" racetrack. Corrosion on the front trim means its not auction-worthy and is deemed for one of our traveling antique shows instead.

Image

This Heathkit mono amp with push-pull 6L6 ouputs.

Image

A very clean GE with its original, pristine finish.

Image

This Admiral clock radio with a design so ugly its cool.
Image

And this Hamilton Beach mixer for me. Always wanted one of these things.
Image


Top
 Profile  
 
 Post subject: Re: Radio Restoration Diary 2 ( post photobucket)
PostPosted: May Mon 20, 2019 5:55 pm 
Member

Joined: Apr Wed 03, 2019 6:41 pm
Posts: 96
Location: Raleigh, NC
i hope you also have the stainless cup with mating bracket for the mixer?


Top
 Profile  
 
 Post subject: Re: Radio Restoration Diary 2 ( post photobucket)
PostPosted: May Mon 20, 2019 7:54 pm 
Member

Joined: May Mon 30, 2011 10:12 pm
Posts: 1401
Location: Glendale, CA
Bob,

You're so patient to get that Nordmende working again. I'm impressed it has six speakers. It must sound wonderful.
That's a nice looking blender. You should be able to make some great milkshakes with it.

Tom

_________________
"A challenge to be met, rather than an obstacle to avoid." - Mr. Data


Top
 Profile  
 
 Post subject: Re: Radio Restoration Diary 2 ( post photobucket)
PostPosted: May Wed 22, 2019 5:06 pm 
Member
User avatar

Joined: Dec Mon 08, 2008 8:27 pm
Posts: 9804
Location: alameda,CA
Last night's project:
<a href="https://imgur.com/VwNJpdq"><img src="https://i.imgur.com/VwNJpdqh.jpg" title="source: imgur.com" /></a>

Not sure you guys have seen these but they are pretty goofy. You press a button on the top and the front doors and an antenna panel pops open. That also trips a switch to turn the set on.

This was sitting for a few weeks in the garage. I've done one of these before and they are a royal pain. Getting at the bottom of the capacitor can means unsoldering a plate from below. There's little room to install the new ones.
Image

Initially the set did not work. I would get a hum but nothing else. Most of the tubes tested very weak. Long story short, for whatever reason I didn't test the last tube. It was bad and I found that out after poking and prodding in the set for an hour.

The case was polished with Novus No.2, which does a great job on plastics.
Image
Image
Image


Top
 Profile  
 
 Post subject: Re: Radio Restoration Diary 2 ( post photobucket)
PostPosted: May Thu 23, 2019 10:47 am 
Member

Joined: Feb Fri 19, 2016 1:57 am
Posts: 154
Location: Boyertown, PA
Bob - Just a comment on Nordmende Tannhauser. Following are the names of Nordmende radios that were inspired by operas: Tannhauser, Parsifal by Wagner (also Cosima, his famous 2nd wife and perennial inspiration); Carmen by Bizet; Elektra, Arabella by Strauss; Traviata, Rigoletto, Othello, Falstaff by Verdi; Fidelio, Coriolan (unfinished but with frequently played overture) by Beethoven; Turandot, Boheme by Puccini; Norma by Bellini; Roland by Lully; Stradella by Flotow. One radio is also named after Caruso, an Italian tenor from the early 20th century.
Jiri


Top
 Profile  
 
 Post subject: Re: Radio Restoration Diary 2 ( post photobucket)
PostPosted: Jun Tue 04, 2019 10:31 pm 
Member
User avatar

Joined: Dec Mon 08, 2008 8:27 pm
Posts: 9804
Location: alameda,CA
Heeeres the latest...

1: This very art deco looking "continental" set. It was donated last week. We are keeping it as a museum item. I don't have time to restore museum stuff as we're gearing up for the radio day even in July, so instead all efforts will be focused on actual auction or future antique show sets. So all I did was give this a cosmetic clean up job.
Image

2: I forgot to take before and chassis pics of this. Oh well. Its a pretty large Zenith and AM/FM. After a recap it works pretty well. Its very similar as far as the circuit design to their more common larger hi-fi sets with the big speakers.

Image

3: A Crosley. This was a basket case. When I first tried it out it sounded really weird, like the speaker was somehow in the back of the cabinet. When I opened the back a speaker just fell out. Someone had jerry rigged a crappy little speaker in there and the original was gone.
Image

Plus of course lots of wiring was rotten.
The paint was pretty much ruined and there was also a crack in the case. So it was taken apart, sanded down and painted.
Image
The brass bits were soaked in CLR and then polished.

Image

And I snapped my favorite nippers. Crap!
Image

And here it is all done
Image

4: This grubby GE clock radio. These are such a pain in the ass to take apart and re-assemble. But anyway, the plain white case meant there would be no way it would ever sell.
Image

Testing revealed the IF/RF cans were suffering silver mica disease so off to the museum for replacements...
Image
Replacing the cans solved the issue. After a recap I cleaned the case, took it outside and prepared for paint.
The dial front was snapped out and the two halves painted. Cocktail pink is very popular with the ladies...

Image

And here it is with new paint.
Image


Top
 Profile  
 
 Post subject: Re: Radio Restoration Diary 2 ( post photobucket)
PostPosted: Jun Mon 10, 2019 4:53 pm 
Member
User avatar

Joined: Dec Mon 08, 2008 8:27 pm
Posts: 9804
Location: alameda,CA
Here's Sunday's project.
Image

You won't find many of these in the US as they were sold for the Japanese domestic market. Its a 50's era JVC ( Victor Company of Japan), which was originally a part of RCA, which severed ties with JVC at the onset of WW2. Its a small "consolette", made for the small apartments common in Japan. Luckily it actually had two voltage settings. When I started working on it the setting was at 100 volts, which is the voltage used in Japan. I was able to move the fuse to a 115 setting meaning at least the tubes aren't going to cook alive.


Its interesting to me that while the set is a Japanese market unit that the parts, stampings on the chassis and tubes are all in English.
Image

On the back was what appeared to be an electrical outlet. This was for additional accessories such as a record or tape player, and I assume these drew very little current. Why? Well take a look at the pathetically thin wire connecting it!
Image
Image

As I cannot assume whoever buys this won't do something dumb, like plug in a hair dryer or something to that outlet I removed the wiring to it.
The chassis was overall in nice clean condition. All caps were replaced. I kept a few of the old ones as they say " Victor" on them, which is kind of unique.
Image

Bluetooth was added and goes into the auxiliary input. Interesting that there were three inputs: One for tape, record player and radio and yet they all fed into the same thing meaning the user would have to turn one device off over another. Oh well. It works.
Image

This thing sounds surprisingly good for what it is and looks like. Its got decent bass and clean highs.
Image
Image


Top
 Profile  
 
 Post subject: Re: Radio Restoration Diary 2 ( post photobucket)
PostPosted: Jun Wed 12, 2019 4:20 pm 
Member
User avatar

Joined: Dec Mon 08, 2008 8:27 pm
Posts: 9804
Location: alameda,CA
Here's another set from the last few days.

Before I continue, do people actually read this anymore or is it getting redundant?

Anyway... this was donated about a month ago:
Image

Its a 40's era Canadian RCA. I really liked the dial glass "slats" running across the front. But as seen the set was in very poor cosmetic condition and I am certainly no expert at refinishing.

As with a number of American brand, Canadian made radios it seems pretty robust and "beefy" compared to the equivelant US-made set. Clearly even in the 40's Canada must have still have a varied electrical grid as seen by the huge transformer meant to handle from 20-60 Hertz.

Image
Image

Someone had been in there before. I forgot to take a chassis before pic but basically the previous guy had tacked on an additional electrolytic to the original, leaving the original in circuit. Very clumsy and of course the set didn't work. I cleaned all that up and got it back to playing great.
Image

The dial slats are made out of plexiglass and were scratched and abraded. Going over them with Novus No.2 brought back the shine.
Image
Image

As for the case, the top had to be sanded down and refinished. The rest, in order to blend with the new finish was cleaned, rubbed down with steel wool and given one light coating of varnish. Also- the dull brass plate was stripped and polished as well.

Image
Image


Top
 Profile  
 
 Post subject: Re: Radio Restoration Diary 2 ( post photobucket)
PostPosted: Jun Wed 12, 2019 4:32 pm 
Member
User avatar

Joined: Jan Thu 01, 1970 1:00 am
Posts: 684
Location: Cedartown,Ga. USA
I truly enjoy your posts, thanks.

_________________
Rickey N4IDQ "Turn your radio on!"


Top
 Profile  
 
 Post subject: Re: Radio Restoration Diary 2 ( post photobucket)
PostPosted: Jun Wed 12, 2019 5:22 pm 
Member
User avatar

Joined: Jan Mon 18, 2010 2:13 am
Posts: 18405
Location: Dayton Ohio
I'm reading them and enjoying them!

Maybe not the most talkative in the thread, but I'm here :D

-Steve

_________________
Radio Interests
-Zenith
-Sparton
-Pre-War FM
Consoles and floor models, the bigger, the better!


Top
 Profile  
 
 Post subject: Re: Radio Restoration Diary 2 ( post photobucket)
PostPosted: Jun Wed 12, 2019 5:46 pm 
New Member

Joined: Jan Fri 26, 2018 6:48 pm
Posts: 9
Location: Richmond, TX
I enjoy immensely your detailed posts on radio restorations. Please keep it up!


Top
 Profile  
 
 Post subject: Re: Radio Restoration Diary 2 ( post photobucket)
PostPosted: Jun Wed 12, 2019 6:01 pm 
Member
User avatar

Joined: Aug Tue 28, 2018 9:22 pm
Posts: 689
Location: Sanford Fla 32771
Not redundant at all. I always read any updates you posted.

_________________
Paul of Florida


Top
 Profile  
 
 Post subject: Re: Radio Restoration Diary 2 ( post photobucket)
PostPosted: Jun Wed 12, 2019 7:25 pm 
Member

Joined: May Mon 30, 2011 10:12 pm
Posts: 1401
Location: Glendale, CA
Hey Bob!
I'm a big fan of your posts! When I see one of your posts, I click onto it right away. I really like seeing all the different radios with all kinds of problems and the solutions you use to clean them up and bring them back to life. Please keep up the good work!

Tom

_________________
"A challenge to be met, rather than an obstacle to avoid." - Mr. Data


Top
 Profile  
 
Post New Topic Post Reply  [ 489 posts ]  Moderator: sofaslug Go to page Previous  1 ... 21, 22, 23, 24, 25  Next

All times are UTC [ DST ]


Who is online

Users browsing this forum: oldtvnut and 14 guests



Search for:
Jump to:  




























Privacy Policy :: Powered by phpBB