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Tractor Talk Discussion Forum

Sears Farm Master Tractor Radio

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Bill Becker

09-15-2003 10:43:47




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I have a Sears Farm Master tractor radio that is currently mounted on my 1952 MM UTU. According to the serial number on the radio, it is a 1953, 6 volt, tube type radio. The radio works good, but the enclosure needs some TLC and the face plate is missing.I am trying to find any information I can about this radio and a location for Farm Master decals.

Sears Roebuck has a histoical archive on their web site, but there is no informarion regarding the Farm Master line that they sold through their catalog.

Any help out there?

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Bus Driver

09-16-2003 16:21:25




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 Re: Sears Farm Master Tractor Radio in reply to Bill Becker, 09-15-2003 10:43:47  
Here is the little that I know about those 6 volt radios- speaking about them generically. The A voltage- for the tube filaments- was, of course, 6 volts. The B+ voltage was higher- maybe 115 or there abouts. The radio had a vibrator which made a sort of AC from the DC. The manufactured AC was put through a transformer for stepup, then rectified back to DC+. I think the vibrator made a full wave AC to minimize the hum in the speaker. My guess also is that the rectifier was also full wave. Lots of filter capacitors. Frequently, the rectifier tube was an OZ4, a gas filled, non-filament tube. That and the vibrator were the most troublesome parts of the radio. I think they would be the most difficult parts to find today. The use of the OZ4 lessened the current load by eliminating one filament and lessened the heat also. Those radios would get rather warm. Today, the vibrator probably could be replaced with a solid state circuit and the rectifier with ordinary diodes.

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thebigron

09-15-2003 16:53:48




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 Re: Sears Farm Master Tractor Radio in reply to Bill Becker, 09-15-2003 10:43:47  
Don't forget to keep looking at e-bay every couple of weeks. Amazing what goes through there.



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Bill Becker

09-16-2003 09:40:31




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 Re: Re: Sears Farm Master Tractor Radio in reply to thebigron, 09-15-2003 16:53:48  
I bought this one on ebay. The only other two that I have ever seen were also on ebay.



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Mr. Green

09-15-2003 13:39:41




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 Re: Sears Farm Master Tractor Radio in reply to Bill Becker, 09-15-2003 10:43:47  

I have a August 15, 1953 Sears sale catalog. I has the Farm Master tractor radio in it. It was not on sale, but still in the catalog. It was $89.50 I can't scan images. If i could i would put it on here for you.
Sears sold allot of things by the farm master name. I know my grandpas first milking machine was a farm master.



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WOW..........

09-15-2003 15:09:47




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 Re: Re: Sears Farm Master Tractor Radio in reply to Mr. Green, 09-15-2003 13:39:41  
That was a lot of money back then.

ATW/WA



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Mr. Green

09-15-2003 15:50:55




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 Re: Re: Re: Sears Farm Master Tractor Radio in reply to WOW.........., 09-15-2003 15:09:47  

I think it was also. Fleet Farm has AM/FM for $118.99 today.



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But then again

09-15-2003 17:01:31




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 Re: Re: Re: Re: Sears Farm Master Tractor Radio in reply to Mr. Green, 09-15-2003 15:50:55  
It's hard to compare the quality of tone those old tube type radios generated, even if they did require a warm up period. I'll have to dig through some of my junk, errr stuff, I have some of those old tube radios around.

ATW/WA



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rhudson

09-15-2003 15:26:55




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 Re: Re: Re: Sears Farm Master Tractor Radio in reply to WOW.........., 09-15-2003 15:09:47  
thats getting to be a lot of money now.



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