Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!purdue!decwrl!mutha.dec.com!starin
From: starin@mutha.dec.com
Newsgroups: sci.electronics
Subject: Re: RCA 9-BX-5
Message-ID: <8902132045.AA18457@decwrl.dec.com>
Date: 13 Feb 89 20:45:24 GMT
Organization: Digital Equipment Corporation
Lines: 45


 
I have (yes it still works!) a RCA Victor Model 9-BX-5 five-tube "portable"
AM Broadcast receiver. It says it uses a "RCA Type VS 050 or equivalent".
The battery holder looks like the battery was about the size of a quart
carton of milk. The antenna is an air core loop wound around the inside of
the case.

>> I don't have the schematic in front of me but I am guessing that 
>> the 9-BX-5 is probably a DC equivalent of the old "All-American 
>> Five". It probably has a 1R5 mixer stage followed by a couple of 1S4 (?) 
>> IF stages and then a 1S5 or 1U5 detector/1st audio and then a 3Q4 
>> 2nd audio stage.

What year was this product manufactured?

>> Probably mid-to-late 40's. By the early 50's, subminiature tubes 
>> briefly replaced the 1R5 types and then transistors replaced both of 
>> them (although there were a few hybrid sets for awhile).

Can anyone share some information on what a RCA Type VS 050 battery was?
????

>> Usually they would series up the filaments so that if it was a 
>> five tube set the filament voltage would be +9V (1.5 x 4 = 6V + 
>> 3V for the 3Q4). Unfortunately, if one filament went west, they all did -
>> like Christmas tree lights. B+ was probably +45V or +90V. RS sells 22.5V
>> batteries so you could series those up along with a 9V battery if you
>> wanted to operate it portable.

>> These are collectible, I think. For more information you might want to 
>> contact the Antique Wireless Association in Holcomb, NY.

>> Hope that helps.

>> Mark

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Mark Starin KB1KJ		 	US NAVY RADIOMEN DO IT 	
Digital Equipment Corp.		 	WITH MORE FREQUENCY
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