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I recently purchased a non working Rheem Mark VII.I have Replaced the power supply caps and did a major cleaning.I also replaced the lytics on the vibrato board as well.
Also the back panel main output jack and level adjustment were badly corroded.so I replaced the output jack,haven’t replaced the level pot yet but resoldered it.I have cleaned all the keys and they work fine now.I am running the organ into a Gem el84 tube guitar amp.(I’ve had to keep the level control low to keep from overdriving the amp)
Some issues I’m having.
#1 When I turn on the vibrato I get a loud motorboating sound.
#2 when turning on any voice switches I get some static through the speaker as well.
#3 fuzz bass,solo bass,and brass voice don’t seem to be working and making some weird noises.
I have resoldered lots of the contacts as well
Thank’s for any help.
Rob.
Follow Ups:
I can tell you right now that you will no doubt need to tweak the coil on the vibrato board..The motorboating is an oscillation and humidity could have caused the coil to drift a bit and you just have to tweak it..Just go a half turn to 3/4 turn one way or the other and see if that cures it..Also,any of the old electrolytics on the boards should be changed..They are small values and they open many times or drift in value..I realized this was a solid state unit so I deleted my original post.
"If it measures good and sounds bad, it is bad; if it measures bad and sounds good, you have measured the wrong thing."
- Daniel R. von Recklinghausen
Edits: 01/22/15 01/22/15
Great info Michael. There still are a few lytics I need to change out.
I will definitely try tweaking the coil.amazing how many parts were crammed into
These organs.
Btw nice goodwill find :)
Rob.
Thanks..
I can't get over how good it sounds..It reminds me of my old Nak OMS7II
I'm a vinyl guy all the way but I can tolerate this.
"If it measures good and sounds bad, it is bad; if it measures bad and sounds good, you have measured the wrong thing."
- Daniel R. von Recklinghausen
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