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 Post subject: Pictures of radios that have had a problem or meltdown
PostPosted: Oct Fri 31, 2014 4:05 am 
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Joined: Aug Thu 27, 2009 7:47 am
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Location: Seattle 98125
I hope this isn't against the rules or anything...

I'm writing a series of articles about antique radio repair for a print magazine that's broadening its horizons of hobby electronics, starting off with an overview of what's out there and what features and challenges you might face with different years of radios.

It'll also include a section about things to look out for when buying one, and I'm hoping to include some photos that obviously show problems, hacking, melted transformers, chewed wiring, that sort of thing. "Stay away if you see these symptoms if this is your first project."

Trouble is...I don't have any that I've taken myself, so I turn to the community: Do you have a photo of a radio that's had something bad happen to it in the past that's pretty obvious from a quick look at the back?

Melted transformer
Filter cans with goop leaking out the top
Smoke/rodent/terrible rust damage
Chewed wood and wires
Parts hanging off
Weird tube substitutes or mods (WW2-era kludges)

If you have a photo, I'd love to see it. The photo will get incorporated into my article so I'd need you to indicate you're okay with my re-distributing and sub-licensing the photo as it's going to be published commercially. I'd love to attribute the photos to your name or ARF handle, and include a link back to this forum, but it's not exactly like this is a big money article or anything so I couldn't offer you any money for the picture, just bragging rights.

They don't have to be any particular size but the bigger the better; if you have one and it's too big to post as an inline image I can give you my e-mail and you can send it that way.

I hope this isn't against the rules to post this, and this isn't offensive to anyone as it's certainly not intended to be! Just a new way to spread the love of antique and vintage radios to a group that's probably not been exposed to it so far, and doesn't know how fun and rewarding of a hobby it can be.


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 Post subject: Re: Pictures of radios that have had a problem or meltdown
PostPosted: Oct Fri 31, 2014 4:54 am 
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Location: Carmel, Indiana
It's been my experience that about 50% of all bad transformers don't show any symptoms until their powered up. What I do to determine if a power transformer is bad is to take out the rectifier tube and turn on the radio. If the transformer stays cold after about a minute or two, it's good but if heats up within a minute or two, it's shot. Now this test doesn't work 100% but it's close. I've avoided a lot of bad luck by conducting this very simple test.

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 Post subject: Re: Pictures of radios that have had a problem or meltdown
PostPosted: Oct Fri 31, 2014 4:58 am 
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Location: Seattle 98125
Definitely! I've found a few that way myself, it's quick and easy.


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 Post subject: Re: Pictures of radios that have had a problem or meltdown
PostPosted: Oct Fri 31, 2014 5:17 am 
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Location: Phoenix, AZ
Fusistor that lost it's insulating material but still functioned.
Image

2 tubes on the right overheated the PC board and blackened it, did not affect function of the radio but will eventually cause problems.
Image

Leaky crusty filter capacitor and a burned up resistor.
Image


Don't know if this is what you are looking for but If you want to use them you can. PM me and I will fill in details and can send you the original full size pics.

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 Post subject: Re: Pictures of radios that have had a problem or meltdown
PostPosted: Oct Fri 31, 2014 7:08 am 
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Location: Seattle 98125
Flinx - that's excellent, I'll send you a PM tomorrow for the details. Those look like they'll be pretty helpful for the '60s through the end of the tube era.

(Of course to everyone else - still looking for '20s-'50s problem photos!)


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 Post subject: Re: Pictures of radios that have had a problem or meltdown
PostPosted: Oct Fri 31, 2014 9:16 am 
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Here are some. Same deal as Flinx. I can annotate for clarity and you can feel free to crop. I'm easy. :wink:


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 Post subject: Re: Pictures of radios that have had a problem or meltdown
PostPosted: Oct Fri 31, 2014 1:41 pm 
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Location: Carmel, Indiana
jkoebel wrote:
It'll also include a section about things to look out for when buying one,


Keep in mind, people usually don't have the luxury of looking under the chassis, of a radio, for the tell tale signs of a serious problem. This is very true at auctions, estate sales, and can be true at some uncooperative antique shops/malls.

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 Post subject: Re: Pictures of radios that have had a problem or meltdown
PostPosted: Oct Fri 31, 2014 1:55 pm 
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I sent you a PM wit pictures in it. You may use them I may have original files but I would have to dig

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 Post subject: Re: Pictures of radios that have had a problem or meltdown
PostPosted: Oct Fri 31, 2014 3:42 pm 
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Joined: Nov Mon 05, 2007 11:08 pm
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Location: Calgary Alberta
Sometimes you will find a mouse nest in the radio.. There will usually be telltale signs on the chassis
like rusted mouse urine.
Here is the inside of my rogers 10-12 when I opened it.


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 Post subject: Re: Pictures of radios that have had a problem or meltdown
PostPosted: Oct Fri 31, 2014 5:29 pm 
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Location: Rayleigh, BC, CANADA
I posted a thread about a year ago on a Rogers Majestic 4421 that I acquired locally on craigslist

viewtopic.php?f=1&t=229418

this is exactly how the radio looked at time of purchase, the 80 rectifier had been replaced with a 5Y3.
the if can had been fitted with a juice can but the coil itself was still original part.
most of the filter caps had been replaced sometime back in the 80's so this radio was still receiving quite well.
also none of the original knobs were present.
it's been on the back burner for a while, I had other projects that took priority.

I have a larger photo if you want it, PM me.


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 Post subject: Re: Pictures of radios that have had a problem or meltdown
PostPosted: Oct Fri 31, 2014 6:10 pm 
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Location: Seattle 98125
I've sent PMs to you guys, thanks so much! These are really great, especially the under-chassis photos.

I don't suppose anyone else has any more photos like the Rogers, or similar, where there's something visibly "off" without taking the chassis out? Indiana Radios noted, most people won't be able to pull the chassis to look, so shots of tell-tale signs of trouble visible without removing the chassis would be very helpful too.

Obviously something that looks fine on the outside is no guarantee it's not a mouse house inside, but an IF transformer that's knocked half off (or replaced with a juice can) or a speaker that's torn to shreds is a pretty good sign to "stay away".


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 Post subject: Re: Pictures of radios that have had a problem or meltdown
PostPosted: Oct Fri 31, 2014 8:34 pm 
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Joined: Jul Wed 06, 2011 1:33 am
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Location: Northern Illinois
A picture of wax oozing out of a transformer (although actually the transformer still works OK 3 years after I took this photo, so maybe this is not 100% fair). And a nice example of insulating tape madness as well. This is a Coronado 587


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 Post subject: Re: Pictures of radios that have had a problem or meltdown
PostPosted: Oct Fri 31, 2014 9:14 pm 
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Here's one I own that something snacked on
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 Post subject: Re: Pictures of radios that have had a problem or meltdown
PostPosted: Nov Sat 01, 2014 3:06 pm 
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Currently have no photos, but I've seen it all! When looking for a radio at a swap meet or flea market, about all you can do is look over the cabinet (including knobs!), take a peek in the back to see if the radio looks original or molested, and if anything appears incorrect set it back down and walk away. Of course this is a judgement call; if the electrolytic is missing it might be a good thing -- new ones underneath. If the electrolytic is THERE it might mean exactly the same thing. If the electrolytic is the proper can type, but looks new, it might be good -- but you never know for sure till you get it home. Of course price makes a difference; if the radio seems sloppy but it's a desirable set for cheap, use your own discretion there. It's never recommended to turn it on (unless rebuilt), but if someone else does it, and it works, that's a sign that you can rebuild it easily.

Total judgment call, I suppose this is really part of the fun of restoring radios -- little surprises appear everywhere.

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 Post subject: Re: Pictures of radios that have had a problem or meltdown
PostPosted: Nov Sat 01, 2014 7:48 pm 
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Location: Philadelphia, PA
The result of an overheated transformer in an Atwater Kent 55 - black tar lava flow!!!
Image

Smoking' Motorola turntable motor.
Image

Exploding E-caps are one way to tell if you wired them in incorrectly!
Image

Live and learn and mostly learn -

Dan

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 Post subject: Re: Pictures of radios that have had a problem or meltdown
PostPosted: Nov Sun 02, 2014 1:49 am 
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capacitors being resistors in a slivertone 2016.

steve


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 Post subject: Re: Pictures of radios that have had a problem or meltdown
PostPosted: Nov Sun 02, 2014 2:11 am 
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Joined: Aug Thu 27, 2009 7:47 am
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Location: Seattle 98125
Thanks! I may end up using some of the underside photos in one of the later series of articles, too.

phinegan - those are fantastic, especially the one of the tar! that's definitely going in the article.


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 Post subject: Re: Pictures of radios that have had a problem or meltdown
PostPosted: Nov Sun 02, 2014 2:25 am 
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Here's a regurgitating can capacitor from an RCA C13-2 or C-15. Can't remember which. Can behind it shows what the top should look like, under all that crud.

Image

This is a "before" picture, but the kicker is someone must have replaced that electrolytic back in the 50s-60s as it had replacements under the chassis. They left the old cans on top. The wax paper electrolytics under the chassis still worked The guy I bought it from was using it in his living room when I showed up to buy it & take it home. :shock: [replaced them all anyway to be safe though]. Sounded & worked ok w/ 50 y/o caps but its much better after a full restoration.


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 Post subject: Re: Pictures of radios that have had a problem or meltdown
PostPosted: Nov Sun 02, 2014 3:10 am 
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Extreme rodent damage. I've never seen whole components eaten before. There's even chew marks in the wires themselves, 1 has been chewed through.
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 Post subject: Re: Pictures of radios that have had a problem or meltdown
PostPosted: Nov Mon 03, 2014 6:43 pm 
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Location: Seattle 98125
All these rodent chassis make me so glad that's never happened to me. The only rodent radio I've found is a Grunow 750 World Cruiser where a rodent chewed up the output transformer, a grid cap, and some wood bracing inside but didn't get underneath, and didn't excrete anything.


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