converting vacuum tubes to now a days parts??

[rogerwilco]

Hey,

I'm working on a Circuits project of a 1950s amp for a ami jukebox and i was wondering if it was possible to convert high voltage 6L6G and 5U4G vacuum tubes to a new circuit using now a days parts??? If so what would that Circuit look like?

 

[highfigh]

Hey,

I'm working on a Circuits project of a 1950s amp for a ami jukebox and i was wondering if it was possible to convert high voltage 6L6G and 5U4G vacuum tubes to a new circuit using now a days parts??? If so what would that Circuit look like?

If you mean that you want to convert it to solid state, you can but you'll have to abandon and remove most of the whole thing. There's almost nothing that would be usable. If you mean that you want to refine and upgrade the original as a restoration, parts are really easy to find, including all of the tubes, output transformers, tube sockets, etc. If the speaker is bad, it can be re-coned, even if it has a field coil.

 

[rogerwilco]

yes i do want it to be solid state. so if you say that is not really possible. i will just buy a new amp and use that. but the turntable motor (T.T motor) is wired in to the amp of the ami d80 jukebox. what would the new circuit look like if pulled out to be stand alone?

photo

http://www.electro-tech-online.com/attachments/circuit-simulation-pcb-design/46024d1283532214-convert-vacuum-tubes-dvg.png

 

[TLS Guy]

yes i do want it to be solid state. so if you say that is not really possible. i will just buy a new amp and use that. but the turntable motor (T.T motor) is wired in to the amp of the ami d80 jukebox. what would the new circuit look like if pulled out to be stand alone?

photo

http://www.electro-tech-online.com/attachments/circuit-simulation-pcb-design/46024d1283532214-convert-vacuum-tubes-dvg.png

The power from the turntable comes from the AC line, but there is a solenoid switch in the circuit, driven from the cathodes of the output tubes.

This must be some sort of synchronization signal.

Solid state devices work very differently from tubes. To make another circuit, you would have to get that circuit working and analyze it.

When doing vintage restoration, it is basically vandalism not to return it to its original condition.

Your course of action usually ends up a mess for the above type of issues, and you end up with a worthless exhibit, even if you make it work.

My advise is to restore that unit to as close to original condition as possible.

 

[highfigh]

The power from the turntable comes from the AC line, but there is a solenoid switch in the circuit, driven from the cathodes of the output tubes.

This must be some sort of synchronization signal.

Solid state devices work very differently from tubes. To make another circuit, you would have to get that circuit working and analyze it.

When doing vintage restoration, it is basically vandalism not to return it to its original condition.

Your course of action usually ends up a mess for the above type of issues, and you end up with a worthless exhibit, even if you make it work.

My advise is to restore that unit to as close to original condition as possible.

Most of the AC motors I have seen are synchronous, which would explain the TT being connected where it is. At least the speed isn't voltage-dependent.

I agree about keeping it original. It would be a good learning experience to go through it and learn what does what, what it needs and general circuit analysis. It may need some diagnostics, and that's always a good thing to learn. The best engineers I know learned to repair things first. The worst engineers are all theory and no practical application.