Topics

Hey all!
Just picked up this rather charming Hohner Pianet CH from the early to mid 60s. I got it knowing there was an output issue, with the rather curious little radio circuit being the possible culprit. The Pianet powers up, the trem seems to work as the light bulbs lights up and flashes when engaged, and when plugged in, the hum pulsates at the same rate as the lights flashing. The output hum sounds much like a ground hum.

I've had the radio circuit out, noticed the little coil wasn't soldered to one of the posts, and hoped thats all it was, but unfort wasn't.

Also, is there any quick/easy way of knowing/testing the pickup(s)? There doesn't seem to be a lot of info/wiring diagrams out there! - Anyone much experience with this era of Pianets?!

Hey Folks,

Doing up a Rhodes 54 for a client at the moment, and I noticed that the Tone slider isn't wired in at all, and looks like the .047uF capacitor is missing. Looking to wire one in and get the Tone slider working again, and looking at diagrams and pictures from here, I'm not sure how much re-work I need to do. Here is the current setup - Could anyone out there help me please?!

https://app.photobucket.com/images/z428/butcher650/20200616_123943.jpg?Expires=1592308044&Key-Pair-Id=APKAIW3EMKNWQJ2CAFVA&Signature=gBpu~H9-h~9KUGaQZC-0AnmQprp-zAi16uzkWWJ-fNVZXnFQN3OgLyFNvh0d5hbTXewEurHTXFBoRqt4pW6KRhHWH1VjqxnXe56CMDg-~IGXeV-uP~tl8YNJsyVQoCWZOB5DjfWIQEuGfwjMS5yc8frBaiHm6IGz7JYHf4XuRN3VzYFqU06q7PaLJSfFz0VOeuZuIjKJ-t6DG-EaoSoF8wG447n~EcSAYV23P2J-HPkc8fY~89UwOqwaBWFPGut3dzPBsLuzjRAlg18eOEFa4kp9br0MR1RWXagJ-JX6ocbqvH6~s9DJmyPMUoBJ9QyjrvrpZ3SSTv9AMjqStUgiNQ__

My 79' Mk1 73 stage just keeps fightin' on me!

Ive now got all 73 notes working, 73 good pickups (at last)!
But now, my passive electronics have gone out. I tested my notes by bypassing that and going straight into the harp with a phono so I know its the rail board, plus there be a broken wire:


I'm pretty sure it should be attached to the pot its pointing at as it isn't long enough to attach to anything else really, and I quickly tried re-soldering it, but I didn't have a lot of time and was a struggle to get it to hold. I know I need to strip it back a bit, but am I thinking correctly in that it does live on that pot?

Thanks once again in advance!

Hey folk,

I have successfully managed to rewind 3 of my dead pickups so far, using a little jig that I knocked up and my cordless drill. Works a treat, now I've got my technique of guiding and unwinding with my other hand.

However of the three I've done, none of them are showing any resistance on my meter at all, which is odd. (I think).

I've re-wound from a complete dead pickup to an empty pickup with good posts, so I didnt need to count the revolutions. I've only tied the wire onto the post from the coil winding start, and then at the end when I was done, I haven't soldered the posts yet. - Does this make a difference?

If not, is someone able to explain why, when I know I've got a complete re-wound pickup with it tied on each post, why I'm not getting any reading on my meter? - I mean none, not even a little bit. Help!! 

Hey folks,
I'm a newbie here, and a newbie to the Rhodes, so I apologise in advance if the question I'm about to ask are obvious, and/or been covered before!
Quick back story:
I'm servicing/repairing/modding a 77' MK1 73 for a good friend if mine. Ive already done the bump mod, and replaced the hammer tips, and about to replace the tone bar screws and grommits in preparation for voicing and tuning.

Angwho, Ive wanted one of my own for so long, and having his to work on was unbearable knowing I'd have to give it back, so I bought one for myself!! Found a 79' Mk1 73 being sold by someone else I knew, and he was 100% with its state and condition, which isn't very good. With it being a 79' it has the factory bumps on the key pedestals which is great. Ive replaced the damper felts as they were shot, and Ive got a tone bar screw and grommit kit ready for this one too. The only thing with this one is, is there are more dead pickups than good ones. I can't see any visible breaks in the pickup wiring, but I'm going to re-wire it anyway.

My question is related to the red wire at the top end of the harp and where it connects, as there is a difference in the 77 Im doing for my mate, and my 79, and I'm not sure which one is right, or if they both are. Here are the pics:

His 77' mk1:


My 79' mk1:


My other question is, when measuring the resistance of each pickup, (probe of meter on each side of one pickup) what number should I expect to see?

There are differences all over the place on mine, consistant on my mates (which I'd expect as his pickups are sounding fine). His read on average avout 0.50.

Ive done the screwdriver test on both pianos (his all pop) - although not very very loudly. Some of mine do, most don't, and the ones that do, some don't actually play when its plugged into an amp.

Help! (And many many thanks in advance)

Newbie Glen