starin@mutha.dec.com (02/14/89)
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 ***************STANDARD DISCLAIMER APPLIES******************** ______________________________________________________________ Mark Starin KB1KJ US NAVY RADIOMEN DO IT Digital Equipment Corp. WITH MORE FREQUENCY Merrimack, NH (603)-884-5596 DECWRL::"abe.dec.com!starin" ______________________________________________________________
cgs@umd5.umd.edu (Chris Sylvain) (02/14/89)
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[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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