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 Post subject: What are these components?
PostPosted: Aug Fri 27, 2021 3:57 am 
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These orange components must be electrolytics due to the red + on them. This is from a Global radio. I haven't seen this shape before for a radial electrolytic capacitor. Oops, pardon me, it's a Zephyr ZR-930.


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 Post subject: Re: What are these components?
PostPosted: Aug Fri 27, 2021 4:15 am 
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Unless they're diodes, maybe??
You have a schematic? Any clues there?


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 Post subject: Re: What are these components?
PostPosted: Aug Fri 27, 2021 4:37 am 
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I saw it on Ebay I don't have it. Just unusual for caps, they look more like transistors.


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 Post subject: Re: What are these components?
PostPosted: Aug Fri 27, 2021 4:58 am 
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Looked at pics of the guts of a couple other Zephyr ZR-930 on ebay & they all showed a lot of manufacturing changes in the parts. Nothing that clearly hinted at what those parts were.


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 Post subject: Re: What are these components?
PostPosted: Aug Fri 27, 2021 12:41 pm 
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The fact that some of those devices have red paint dots while others do not strongly suggests to me that they are transistors, not capacitors. One would have to get a better look to really know. Not that I have ever seen an electrolytic with that shape and size, but one would expect them all to be marked the same way if the dots indicated polarity.

With the technology of the 1950s and early '60s it was really hard to produce large numbers of transistors with the same characteristics. Most of them varied all over the lot. So it was common for radio manufacturers to test and grade the transistors as they came in and then use them where they'd work best in circuits. Paint dots were a very common way of indicating which transistors tested one way or another; transistors from Zenith radios of that time frame can be very colorful with all the different dots they used.

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 Post subject: Re: What are these components?
PostPosted: Aug Fri 27, 2021 1:03 pm 
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The orange things are germanium transistors which were used in earlier solid state electronics. Harry


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 Post subject: Re: What are these components?
PostPosted: Aug Fri 27, 2021 4:12 pm 
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Chris 108,

Since it says "9 transistors" on the front, and if you count the germanium transistors it does look like 9 or 10, they shouldn't be more transistors. But I dunno.


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 Post subject: Re: What are these components?
PostPosted: Aug Fri 27, 2021 4:35 pm 
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They all have + on them. Wouldn't that mean they're capacitors?
Also there are those two axial electrolytics, plus those four orange ones would make six electrolytics total which seems more likely. Your thoughts?


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 Post subject: Re: What are these components?
PostPosted: Aug Sat 28, 2021 6:49 am 
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I have one, so I would suggest that no speculation is needed. Mine has 9 conventional looking Transistors. The subject also has nine, assuming that it's orange creatures would be Transistors as well.


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 Post subject: Re: What are these components?
PostPosted: Aug Sat 28, 2021 8:40 am 
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https://www.radiomuseum.org/r/zephyr_zr_930zr93.html

The number of IF cans is consistent with a 6 transistor set. I've had sets that had diode-connected transistors and even transistors on the board not connected to anything, just to run up the count.

RRM


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 Post subject: Re: What are these components?
PostPosted: Aug Sat 28, 2021 9:59 am 
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Retired Radio Man wrote:
https://www.radiomuseum.org/r/zephyr_zr_930zr93.html

The number of IF cans is consistent with a 6 transistor set. I've had sets that had diode-connected transistors and even transistors on the board not connected to anything, just to run up the count.

RRM

I haven't seen any Transistor portable with more than 3 IF cans, regardless of Transistor count.

I haven't gotten mine singing yet, so can't comment on performance, but I would believe the extra 3 Transistors are actually doing useful functions, most likely in the audio stage, as an untuned RF amp, or using separate Transistors for converter and osc functions.

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 Post subject: Re: What are these components?
PostPosted: Aug Sat 28, 2021 3:15 pm 
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It's interesting seeing the differences in transistor chassis. When I recapped the Hitachi TH-666, they had mounted two electrolytics on one side of the chassis, and two underneath it. That's the first time I've seen that in a pocket size radio. Thanks for everyone's comments.


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 Post subject: Re: What are these components?
PostPosted: Aug Sat 28, 2021 9:54 pm 
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Zenith Royal wrote:
It's interesting seeing the differences in transistor chassis. When I recapped the Hitachi TH-666, they had mounted two electrolytics on one side of the chassis, and two underneath it. That's the first time I've seen that in a pocket size radio. Thanks for everyone's comments.

Early Zenith Royal's also did that, and there were others as well.

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 Post subject: Re: What are these components?
PostPosted: Aug Sat 28, 2021 10:11 pm 
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The fourth can will be the oscillator coil.

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 Post subject: Re: What are these components?
PostPosted: Aug Sat 28, 2021 10:31 pm 
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Tim Tress wrote:
The fourth can will be the oscillator coil.

With the core marked in red.

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 Post subject: Re: What are these components?
PostPosted: Aug Sat 28, 2021 10:39 pm 
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fifties wrote:
Zenith Royal wrote:
It's interesting seeing the differences in transistor chassis. When I recapped the Hitachi TH-666, they had mounted two electrolytics on one side of the chassis, and two underneath it. That's the first time I've seen that in a pocket size radio. Thanks for everyone's comments.

Early Zenith Royal's also did that, and there were others as well.


Yes, I meant the shirt pocket size radios.


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 Post subject: Re: What are these components?
PostPosted: Aug Sat 28, 2021 11:50 pm 
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I thought the name sounded familiar. I looked and I have a Zephyr radio also but mine's a six transistor model. It's built well, with a thick plastic case. There's one of those microscopic schematics on the inside of the back cover. I replaced some electrolytics a few years ago and got it working.

RRM


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 Post subject: Re: What are these components?
PostPosted: Aug Sun 29, 2021 12:53 am 
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Quote:
They all have + on them. Wouldn't that mean they're capacitors?
Also there are those two axial electrolytics, plus those four orange ones would make six electrolytics total which seems more likely. Your thoughts?


You are probably right. I looked at them on a different computer with a different monitor and there are + marks on all of them. When I first answered I only saw red dots on a couple of them, which made me think graded transistors. No wonder I sometimes seem to get stuck with stuff from eBay that is in worse shape than it looked in the pictures!

I'll have to take back what I said above and say they'd almost certainly have to be some kind of oddball electrolytic capacitors at this point, perhaps "flattened" or made in an oval shape to fit a tightly packed PC board. "Flattened" or oval film capacitors are available today for exactly that purpose.

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 Post subject: Re: What are these components?
PostPosted: Aug Sun 29, 2021 1:09 am 
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Thanks Chris!


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 Post subject: Re: What are these components?
PostPosted: Sep Mon 06, 2021 2:48 am 
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Retired Radio Man wrote:
https://www.radiomuseum.org/r/zephyr_zr_930zr93.html

The number of IF cans is consistent with a 6 transistor set. I've had sets that had diode-connected transistors and even transistors on the board not connected to anything, just to run up the count.

RRM

I read about a pissed off oddiophile who discovered that the preamp tubes in his esoteric and considerably expensive "hybrid" amplifier were only connected at the heater pins. Further disassembly of the POS revealed that the signal flowed from inputs to outputs through a piece of Fr4 board containing a blob of some unidentifiable plastic goop. A small transformer and handful of velveta-grade "offboard" components filled out the parts suite.
I'd bet that it had sounded pretty darned good to him, up until the time of his rude epiphany. rOtFlMaO!

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