Rock-Ola series c ST 39

[scalebowler]

Here is another place that might have the tube you need. http://www.surplussales.com/Tubes-Sock-Acc/VacTubeIndex.html I use them to buy capacitors for some tube radios that I have and was refered to the site by a friend who does ham radio stuff and repairs electronics for a living.

[cokemachinesandmore]

did you resolve the mechanical issues?

[zadd]

Yep . Drive belt was ripped and stretched barely making contact with pully . The coin mech was stuck and engaging the selection solenoid . Got all that working . Had to clear out alot of old thick grease from the main gear  to get the it working smoothly . Just need to replace a few parts and get a tube for the amp and it should all be working . The coin mech needs cleaned (the coins get stuck) but I can manually feed it and it will cycle the correct selections . The wiring will all need to be gone through because of age and brittle . The amp will also need rebuilt but hopefully get this playing and working until I tear it apart .   

[cokemachinesandmore]

Great to see that machine is going to be a survivor

[zadd]

Ok I know nothing about amp tubes . I need a 5u4g . I figured out that a 5u4gb is the the newer version of the same tube . Now ... The one I pulled out has 8 pins and I see alot of these tubes with 5 pins in the gb version . My question is does the tube have to have 8 pins or does a five pin now do the same thing ? Thanks

[Kilroy]

http://www.oddmix.com/tubes/pdf/tsub_05.pdf

I'll check with my partner, but I think a tagged substitute will work.

[JBVending]

Pins 1,3 and 7 are not used on a 5U4. It is a full wave rectifier tube and even has solid state replacements if you want. They can be found for around the 10 dollar range.

JB

[zadd]

Ok . That helps alot . It will be easier to find a replacement now . Been looking for 8 pin all this time. Thanks guys

[SIGNGUY]

shrinky dinks?? what u talkin bout willis?

Cmon Diego... you don' remember Shrinky Dinks???  http://www.shrinkydinks.com/

[zadd]

Well it looks like a new tube isn't going to fix the problem . The amp may have a bad transformer . Sending it off next week to have it looked at and rebuilt .  I put the new tube in and it got pretty hot and so did the transformer . So will see ?