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1947 bendix 847-b
I was wondering if any of you could help me with information on this radio,
and possibly a schematic? I got one recently (the one in the picures is not the one I have.) The model is 847-b made by Bendix in 1946-48.
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Looking for zenith cobramatic parts -johnny the raster master! |
#2
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Did you check Nostalgia Air, for Riders coverage, or maybe Sams.
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#3
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Nostalgia Air, has perfect coverage on that model. Rider's scans.
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Thank you
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Looking for zenith cobramatic parts -johnny the raster master! |
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Interesting that the FM dial scale goes up to 109Mc.
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Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4 |
Audiokarma |
#6
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I know, I was just noticing that myself, I didn't realize that the modern FM went up to 109 Mhz... although an old Silvertone radio I had (I ended up scrapping it out and keeping the cabinet for a TV stand because it was too far gone for me to try and salvage it) supposedly went up to 109 Mhz according to the Sams photofact I had for it and that Silvertone was from around 1948...
my guess is that the 109 Mhz portion of the original modern FM Band was reallocated by the FCC to either the police or the Military (just like everything else was that the FCC didn't think we needed anymore including the old Analog TV broadcast spectrum, I'm kind of seeing a pattern here... Last edited by Captainclock; 11-22-2015 at 10:36 PM. |
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I'd have to read up again to be real exact. |
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Yeah, I'm not sure either all I know is that the reason why FM was created in the first place was because the FCC got rid of Channel 1 with Analog TV shortly before we entered WWII so then because of that then the 42-50 Mhz FM Broadcast Spectrum came into being, but then the FCC thought that the military could make better use of the 42-50 Mhz spectrum better which was when they decided to open the modern 88-108 Mhz FM band just shortly after WWII (but I wasn't aware of it being originally 88-109 and from when to when that was I don't know.)
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#9
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A little history of the FM bands:
http://www.damninteresting.com/the-t...h-of-fm-radio/ I don't find any reason to believe that it *ever* extended to 109 mhz in the US. jr |
#10
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And yes I know all about the history of FM broadcasting I've read the wikipedia entry about it several times now, and just like your article you listed it didn't make any mention about any sort of history of different frequency changes or additions or subtractions to the FM Band in its long 70+ year history dating back to 1938, they make mention about the major changes to the FM Band like talking about its initial bandspread when it was initially conceived of in 1938 of 42-50 Mhz and then they make mention about the change from the 42-50 Mhz bandspread to the 88-108 Bandspread and then the conception of FM Stereo and FM Quadraphonic, and that's about it, but they don't make any mention about any time in history when the FM Band may or may not of included 109 Mhz in it, which it would of had of had included it at some point in time in order for manufacturers to put it on their radio dials otherwise like I said you run into fraud issues. Last edited by Captainclock; 11-23-2015 at 10:28 PM. |
Audiokarma |
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Quote:
If your car came with a sealed bottom and a propeller such that it could safely cross lakes, but other wise was a normal car, and they did not advertise that feature or sell you on it, would you not think that was cool or at least not a problem even if you never bothered to use it?
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Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4 |
#12
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Its a bit like a volume control that goes to 11.. I think the band always ended at 108. Not unusual to see an AM set with a little extra coverage past the end of the band.
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#13
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#14
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This was replaced by 2-way VHF police radio in, IIRC, the 1950s. The extended coverage (1600-1700) can now be used to listen to standard AM radio stations operating in the "expanded" AM broadcast band, 1600-1700 kHz. These stations generally operate with far less than 50kW; most of them are 10kW or less, with a few even operating daytime only. BTW, I've seen only one other AM/FM table radio (aside from the picture of a Bendix radio that tuned 88-109 which Radiotron attached to his post) that tuned 88-109 MHz on FM. It was a late-1940s-early 1950s Sylvania table set my great-aunt had in her kitchen. The photo of the Bendix set reminded me of it.
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Jeff, WB8NHV Collecting, restoring and enjoying vintage Zenith radios since 2002 Zenith. Gone, but not forgotten. Last edited by Jeffhs; 12-09-2015 at 10:06 PM. |
#15
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Surprisingly had this one. It's in Sams 27.
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"Restoring a tube TV is like going to war. A color one is like a land war in Asia." |
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