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Old Radios:Radio Project Update II    The Luck of the Irish Eluded Us

3/18/2014

3 Comments

 
Picture
"Hosed."
     A bright flash of light, and one word- “Hosed." sent my hopes of getting my radio to work on St. Patty’s Day up in smoke.

    Things had been going well. We had tested all the resistors and determined only one needed to be replaced. 
 (It read more than 20% out of tolerance on the volt meter.)
We had only to replace the resistor, replace the filter caps and add a new line cord. That sounded fairly simple. Oh, what I didn’t know.

     Could it have been an omen? The first thing I did- drop my pencil on the cement shop floor. The lead broke. “Where’s the pencil sharpener?” Russ didn’t look up, but rather over his glasses as he continued to push wires around. He tilted his head to the side.

     I glanced where he had indicated. There sat a heavy-looking, circular contraption with what appeared to be a scrub brush attached to it. “Huh?” Didn’t look like any pencil sharpener I’d ever seen. He slowly tore himself away from the radio and came over.

     “I’ll do it.” He flipped a switch; a loud whirring sound begins, a circular motion starts; he presses the pencil blade against the moving blade. “There.” He hands it back to me. Well when in Rome. Guess that’s how pencils get sharpened in man’s caves.

    The thought occurs to me, this is a rare opportunity to  glimpse into an esoteric place.     
 I may be one of the few women allowed access to these hallowed walls, I find myself feeling  a bit honored. Meanwhile, Russ has returned to the radio.

     “Yellow, black, yellow- 400 thousand ohms; that’s not used much anymore.” Now that made sense. I’d never seen it used before. He returned to the wonder wall and returned with yet another compartmentalized plastic box. This one stuffed with small cylindrical shaped parts with various color, striped bands.

    He dug through a number of the banded objects, occasionally picking one up as if to consider its value. He'd then toss it back in, push them around again, do some math,(YEECH) then grab another one. This went on for several minutes. Finally, he found the right one. It wasn't a yellow-black-yellow, but he said it would work.

     I guess if you can’t find what you’re looking for, it's okay to choose a different color combo. I stopped for a moment, feeling proud of myself. I’d learned enough to make inferences. I’m doing great, I thought.  

     Russ had the part installed when I got back. “Since this is for you, we’re using free or cheap parts; if it were for someone else, we’d be using a re-manufactured, dog-bone resistor.”

     Now wait a minute, I thought. Dog-bone? I decided I didn’t care if my radio had a dog-bone in it or not. “But, if we’re not using dog-bones (I'd started picking up a bit of jargon) how can we be sure it’ll work?”

     “I’m not so sure it will. Someone has been through this and hosed it.”

     “”Cause they were trying to clean it up?”

     “No,” he grunts, his shoulders slump. “That means they messed up the wiring when they tried to fix it.”
 

Picture
      After standing and looking with distain at the radio for a few minutes, we’re onto the next task- filter caps. Filter caps are not a generic item. We searched through a manual, a huge set of big green books, and the Internet, before we found the correct filter caps. Russ determined the radio had one ballast, and four tubes. More math! (YEECH.) Micro-ferrets? Sounded like some kind of itty-bitty, little critter to me. Wrong again. Russ figured we needed one @ 24 (450 volts), and one @10 (450 volts). Oh yeah, polarized.

     Got those installed; had to use the solder sucker to clean out the thrus on a couple. (See, told you I’m learning the jargon.) 

     Final and last step (phew). Install a new line cord (the thing that plugs into the wall). Russ pulled the line cord in half.

   “Are you getting frustrated with me?” He didn’t answer, he merely proceeded.

    “One end goes to the on/off switch, the other to the ballast. Only on an AC/DC radio.”

      I (for real) put the tubes back in, and the tube shields back on. The moment of truth had arrived.  We were ready to plug it in. “Is this the point we could get electrocuted?”

     “Not really. It’s safe. Because if it were really messed up, it’ll blow the circuit breaker.” 

     Now he tells me. 

     He pushes the plug into the outlet. FLASH. “Hosed.” That was it.  Just goes to prove- 
 I don’t have to touch anything to break it; I can just look at it.

     Till next time…when we (Russ) tries to figure out what went wrong. Can we get it working? Find out next time. Till then...


Regards,

Sue
Phlog’s blog
3 Comments
Hugo w6hio 73's
3/19/2014 02:44:04 am

Marconi had the same troubles times ten n w it's radio history keep on striving g

Reply
Sue
3/19/2014 02:49:58 am

I got to admit, I didn't REALLY want to fix the radio- I just wanted it fixed. I'm actually finding it to be quite interesting. Learning new things is always a joy; it just wouldn't ever have occurred to me to try this.

Reply
Bob Scahfbuch
3/6/2016 11:37:35 am

Hi Sue,
We haven’t met but I need to say something about your outstanding restoration the Aetna radio. This model has to be one of the rarest of all radios. I believe I have seen one other as shown on The Radio Attic’s Archives at: http://www.radioatticarchives.com/, where I do not think it is yours and it shows as model 550.
The great news is that after many years after seeing your restoration on the internet and searching, I finally found one for myself on eBay, of all places. I need to thank you for your restoration article because it peaked my interest in all of those old small radios with the wild speaker design cutouts.
After more search, I have found that the model number as listed in the Archives, as 550, is incorrect. I needed to search the entire list of 95 Aetna chassis schematics in Nostialga Air’s Resources under Aetna where the 550 schematic drawing has no resemblance to our Aetnas. Rather model 30 is an exact match having the 2 wave bands, the 2 pilot lights, the ballast “tube” (not a resistor line card), and the 4 tubes, 6D6, 6C6, 43, & 25Z5.
Model 31 comes the closest, but only shows one pilot light.
I was so interested in this radio, I needed to tell someone, mainly THE MOTHER OF THE AETNA MODEL 30, Sue.
Regards, Bob Schafbuch, Lansing, MI

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CUSTOM DESIGN BY SUE WEBB  06/2013       Redesigned by Russ Webb     Approved by Fuzzy   Updated:  Pretty much all the time, but I forget to change this date
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