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Old 01-08-2015, 11:15 AM
mbates14 mbates14 is offline
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Need something identified

Can anyone identify this? and is there schematics available for it? it appears to be a Zenith radio power supply/amplifier, but aside from that I dont know.

https://dl.dropbox.com/s/7f3ksndctw3...20338.jpg?dl=0

https://dl.dropbox.com/s/z4gqi6gv16m...20349.jpg?dl=0

https://dl.dropbox.com/s/2p00bszkd5w...20355.jpg?dl=0
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Old 01-08-2015, 11:30 AM
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Date code on one of the caps suggests a manufacture date of 1947, so that is helpful in locating a sams/schematic/model number. Based on that, the Sams would be a double digit sams set (Sams 35-90 or so). ETF has some early Zenith data - check that out as a resource.
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Old 01-08-2015, 11:34 AM
mbates14 mbates14 is offline
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Yea I dont have any sams or riders at all. So ill have to hunt online to see if there is any free data.
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Old 01-30-2015, 05:01 PM
EdKozk2 EdKozk2 is offline
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The power supply chassis looks like it's from a Zenith Model 12h090.
The chassis number 11c21.
The radio had AM, SW, FM1 (old band) and FM2 new band.
The Sam's number was 462-20 from July 1946.

Last edited by EdKozk2; 01-30-2015 at 05:10 PM. Reason: Removed info due to Sam's index errors.
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Old 01-30-2015, 09:11 PM
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maxhifi maxhifi is offline
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http://www.nostalgiaair.org/Resources/713/M0024713.htm

Check here
Attached Images
File Type: jpg image.jpg (79.7 KB, 16 views)

Last edited by maxhifi; 01-30-2015 at 09:14 PM.
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Old 01-31-2015, 09:12 AM
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Quote:
Originally Posted by EdKozk2 View Post
The power supply chassis looks like it's from a Zenith Model 12h090.
The chassis number 11c21.
The radio had AM, SW, FM1 (old band) and FM2 new band.
The Sam's number was 462-20 from July 1946.
Sams 2, folder 20. Sams numbered their early sets with the year, followed by set/folder. Sams 462-20 would be Sams 2, folder 20.

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Old 01-31-2015, 09:16 AM
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Quote:
Originally Posted by maxhifi View Post
The schematic has the old convention of resistance - 47M, for example is not a 47 megohm, but a 47K. Same with the 330M - It's a 330k.

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  #8  
Old 01-31-2015, 01:35 PM
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init4fun init4fun is offline
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Interesting set indeed . I looked at the Nostalgia Air schematic and the first thing that caught my eye was the odd selection of tube base styles used . Exactly one 7 pin mini (6AG5 being used as the RF amp) and one Loctal (7W7 being used as the 2nd IF) with the rest being Octals .

I was also kinda wondering about the single 5Y3 being asked to feed all the tubes' B+ , and do it with enough power to produce decent sound from the pair of 6V6s ....
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