1930's restored Seeburg Amp with 2A3 tubes

Restored 1930's Seeburg amplifier. Uses 4 2A3 output tubes in push-pull parallel plus 2 5Z3 rectifiers. All capacitors have been replaced (electrolytic capacitors and transformers are under cover at rear).
Has been modified for stand-alone use with input gain control and interstage volume control. Connected to Garrard record changer with GE magnetic cartridge.
Also shown is an RCA sound reinforcement amp which uses 4 807 output tubes for an output rating of 50 watts. This amp is used to provide music to the garage, shop and outdoor porch area of Retro Electronics.
For more vintage equipment information please visit http://www.retroaudiolab.com

Category:

Science & Technology

Tags:

• Seeburg
• 1930's
• amplifier
• 2A3
• triode
• 5Z3
• RCA
• public
• address
• 807
• vintage
• retro
• electronics

[retrochad]

Thanks for the good words! This amp had a lot of electrolytic capacitors to replace! We also had to retrofit it for stand-alone use. We bypassed the volume expansion circuit and used the control position where it was for an input gain control.

[Turkeydoodlers]

Geesh chad this is A old video lol.. Love your shop, you taking new customers, I have a few power Amos from a RCA I'd like done

[OlegKostoglatov]

@Xerox6085I Only Chad could answer for sure but he may be using good testing used tubes. I don't think that they used oil filled condensers so much in the 1930s that was more of a post war thing. In truth there isn't any advantage in using oil filled condensers anyhow, the only difference between the oil filled and the regular paper kind is that the paper used for a dielectric was impregnated with oil instead of wax or tar. In either case polyester film is a better substitute.

[CassetteMaster]

Awesome!

[Xerox6085I]

I wonder are you using the remakes of the 2A3 since original NOS is ridiculously expensive, and did this amp originally have oil filled capacitors, as I see those in amplifier from this vintage, some of which contained PCBs.

[UrSSuL]

O hellyeah, that will impress the ladyes :> :))

[bob505470]

ya thinking thae same thing

[Fisher7591]

ah shucks Ernie

[AudiophileTubes]

PHENOMENAL! Thanks for posting!

And I thought my old FISHER 500C stereo receiver, with the original TELEFUNKEN tubes was old!

[teamfab]

This guy looks really uncomfortable lol.

Good video all the same....