Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ncar!tank!mimsy!haven!umd5!cgs
From: cgs@umd5.umd.edu (Chris Sylvain)
Newsgroups: sci.electronics
Subject: Re: RCA 9-BX-5
Message-ID: <4518@umd5.umd.edu>
Date: 13 Feb 89 22:41:31 GMT
References: <8902132045.AA18457@decwrl.dec.com>
Reply-To: cgs@umd5.umd.edu (Chris Sylvain)
Organization: University of Maryland, College Park
Lines: 36

[]
[starin@mutha used multiple quote chars. The singletons are my quotes.] 

In article <8902132045.AA18457@decwrl.dec.com> starin@mutha.dec.com writes:

<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".
< [...]
<<< 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.

Very close.
It contains the following tube complement: 1U4, 1U5, 1R5, 3V4, and 117Z3

<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).

Knowing the tubes used, does this help to date the radio?

<<< [...]
<<< These are collectible, I think. For more information you might want to 
<<< contact the Antique Wireless Association in Holcomb, NY.
<<< Hope that helps.

Sure does. The street address in Holcomb would certainly be appreciated.
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