Trouble shooting amp issue and the WSR play control relay

[andylevine]

I'm trying to troubleshoot a 'no sound' issue from the amp I finished re-capping this weekend.  I could have easily screwed something up (I'm a novice a this) but to be honest, I really have no idea if the amp was functional when I purchased the box.  Its an MRA3-L6, all new tubes, all new caps, most resistors checked for tolerances.

I wanted to check voltages as seen on the schematics between connections to see if i missed something.  It appears that the only way to get voltage from the WSR to the amp is for the Play Control Relay to be closed, correct??  Is there any way to engage the relay with the mech moving??  I tried closing a pin on the pin bank with the mech NOT plugged in but that didn't work (no surprise).  Sorry for the silly questions....I'm still in "learn by doing" mode...appreciate all your help

Andy

[robnyc]

Just tack-solder a jumper across the two terminals on the relay contacts. If you are going to do more Seeburg tube amps you might make a test cable that has a transformer and mating plug for the amp. It is a lot easier than crouching behind the machine. RobNYC

[Ron Rich]

Hi Andy,
Don't listen to Rob-- he's been on this list exactly one year, to the day now and tends to forget things more and more, each day !
The play control relay coil is activated thru the service switch, not the mech. socket--it should pull in with any pin in the play state --
You also need the "117 AC supply" and a speaker--FIELD coil, type, or a PM type, plus a LARGE, 5200 x 25. watt resistor, in all Seeburgs, up to the HFMA-5, when they changed to PM speakers. Plus--the speaker plug ---which provides a ground connection for the B+. Once that's done, you will need to input signal, for AC readings, and if the amp is newer then yours, or yours is equipped with an AVC update kit, you will need to deal with that.  Ron Rich

[robnyc]

Dec 12, 2017 22:54:33 GMT Ron Rich said:

Hi Andy,
Don't listen to Rob-- he's been on this list exactly one year, to the day now and tends to forget things more and more, each day !
  Ron Rich

Actually, you are right (far right) :-) What I do forget is not to assume that, in this case, the other elements were properly connected.

Rob