Seeburg M100C amp, R1 resistor

Q&A about all types of jukeboxes: Wurlitzer, Seeburg, Rock-Ola, AMI, and more.



Topic author
steve_b10
Regular Member
Posts: 45
Joined: Sun Mar 18, 2012 5:21 pm

Seeburg M100C amp, R1 resistor

by steve_b10 » Mon Nov 26, 2012 4:23 pm

The R1 w.w. resistor in the Seeburg MRA3-L6 amp is suppose to be 1200 ohms (5%), 10 w. It has been previously replaced with a 2000 ohm w.w. resistor. Should a resistor with the original specs be installed? What effect would the higher ohm resistor have?
Thanks, Steve.


Ron Rich
Forum Moderator
Posts: 8194
Joined: Sun May 06, 2007 11:31 pm
Location: Millbrae (San Francisco area)CA, USA

Re: Seeburg M100C amp, R1 resistor

by Ron Rich » Mon Nov 26, 2012 5:58 pm

Steve,
I would change it back to a 1200--if you read the parts list, you will see a (*) next to the value listed--if you read below, it states that this should be a 5% tolerance device. I would assume that using the larger one causes voltages to be "off"--but you might measure then to see exactly how far--
Ron Rich


Topic author
steve_b10
Regular Member
Posts: 45
Joined: Sun Mar 18, 2012 5:21 pm

Re: Seeburg M100C amp, R1 resistor

by steve_b10 » Sat Dec 01, 2012 4:10 pm

I've searched many of the local suppliers and found several types of wire wound resistors having the same specifications for the R1 resistor (1200 ohms, 10 watts, 5% tolerance) but having very different construction methods. These included various types of winding methods, type of wire alloy, operating temperature, type of terminal style, cement filled, tubular, silicon coated, vitreous enamel, among others.

Based on the above choices, what type wire wound resistor should I be purchasing in order to replace the damaged original? Which supplier would likely sell that type resistor?
Thanks, Steve.


Ron Rich
Forum Moderator
Posts: 8194
Joined: Sun May 06, 2007 11:31 pm
Location: Millbrae (San Francisco area)CA, USA

Re: Seeburg M100C amp, R1 resistor

by Ron Rich » Sat Dec 01, 2012 6:08 pm

Steve,
As long as it's rated at 1200/5 watts, 5%, the construction won't make any difference--
Any place that has it in stock-- Ron Rich

Who is online

Users browsing this forum: Google Adsense [Bot] and 8 guests

It is currently Thu Oct 06, 2016 4:51 pm