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 Post subject: Zenith chassis 5B2 amp
PostPosted: Oct Sun 15, 2006 2:59 am 
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Just picked this up & can't find anything on it. Pretty sure it say 5B2 chassis. Hard to read. Supposedly 85 watts with the following tubes: 5Y3, 6BQ5, 6BQ5, 12AU7, 6AT6. Also, made into the power cord is a third wire with an RCA plug. What is this plug for?


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PostPosted: Oct Sun 15, 2006 3:43 pm 
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Location: Rochester NY USA
I find chassis 5B20 through 5B29 covered in six Sams folders in the 440-460 range - 1959.


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PostPosted: Oct Sun 15, 2006 4:44 pm 
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It would be an amp from a console phono and or radio combo. The rca plug is the audio input. The 85 watts is the input power, the audio out put would be around 8 to 10 watts.


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PostPosted: Oct Sun 15, 2006 5:48 pm 
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If the power plug is a 2 pin, then the third wire is probably used as an antenna for the radio chassis that was used with this amp chassis.

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PostPosted: Oct Mon 16, 2006 2:21 am 
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Brian, I'm thinking like you. It has an RCA jack for the input. This plug must be for an antenna.


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PostPosted: Oct Tue 17, 2006 2:18 am 
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Chassis 5B22, also 5B24 has those tubes - both in Beitmnans 1959, but that site isn't responding right now... The latter number has the input cable run with the power cord, so that looks like it.


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PostPosted: Oct Tue 17, 2006 3:12 am 
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Right you are, Tom. It's a 5B24. I got this amp, working, with a 12 in speaker & a 5 inch speaker. Have no idea what I'll do with it. I had never seen an input cable molded to a 25 foot long power cord before. So, what is the RCA socket on the chassis for?


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PostPosted: Oct Wed 18, 2006 4:08 pm 
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Was this unit possibly originally sold as an add-on stereo amplifier/speaker for an existing mono console unit? That would explain the strange power cord configuration.

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Experience is what you gain when the results aren't what you were expecting.


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 Post subject:
PostPosted: Oct Wed 18, 2006 5:13 pm 
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OK, I got it figured out. The RCA socket on the chassis is for the other channel. It's a stereo amp, but I only got speakers for one side. The schematic shows speakers plugged into the RCA jack for the other side.


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PostPosted: Oct Wed 18, 2006 5:52 pm 
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After looking at the schematic this is a mono amp, not stereo.

Dave


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