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Fisher 500C Tuner Drum - seeking part!

rocketrobo

rocketrobo

Rocketrobo
Subscriber
So, I just picked up a very nice condition Fisher 500C. Very good cosmetics, some work has been done on it, I'll know more when I get it on the bench. Hope to share some pics when that happens.

However, it has arrived with a broken tuner drum. That is, not the heavy metal flywheel, but the plastic / bakelite drum with a spring that fits onto the actual tuner shaft and has the string wrapped on and attached to it. It is shattered beyond repair; and the spring may be gone as well. Looks like it happened before and someone repaired it with JB Weld. Which has now failed.

I looked on the 'bay, and some other sites, maybe it comes up occasionally but I can't find one now. Does anyone have a suggestion for how I could source this part?

Next is the actual stringing part of the exercise, which may well generate additional questions!

Thank you!!!


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Thank you in advance!
 
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Hiya,

Ouch!!!

A while ago I would have had one I could have shipped you.

In any case did you post a WTB in Barter Town ??

There are a lot of carcasses out there and I know I had this part until I moved all my Fisher Guts elsewhere.

Frannie
 
Thank you for the suggestions! I have posted the request in Bartertown.
I have no idea if another brand would fit - that might be my next route to pursue!
 
rocketrobo said:
Thank you for the suggestions! I have posted the request in Bartertown.
I have no idea if another brand would fit - that might be my next route to pursue!
Click to expand...

For a non-Fisher part to work it not only needs to fit the shaft, but the drum needs to be exactly the same diameter so that the dial pointer and the tuning cap move exactly as needed to make the dial accurate. Good luck.
 
another member is checking their stock of parts for me, and the incompatibilities from fred above have been very helpful - looking at the JoeOldAudio listings as well. Looks like I'm going to b e able to source this bit of unobtanium!
 
This is where 3D printing shines- fixing that which can't be fixed. You just need to find somebody who can draw it up and print it out of a suitable resin. Formlabs has some that are probably a good choice.
 
I've got a 500-B parts unit in my storage unit and maybe an 800-C. I can check those. I kind of thought all those receivers shared the same drum.
 
From a Fisher 400 also works, I think I have some in spare, let me check and I´ll let you know

Regards

Luis
 
Actually, anything with the same length dial scale would have to have the same diameter pulley because the pointer moving across that distance on the dial MUST cause the same rotation of the pulley.
 
Unfortunately, the extent of the damage meant that I had to glue bits back together to measure it! But it appears to be 35mm diameter and 11mm wide. As said by fred, the diameter is critical to maintaining the accuracy across the dial.
 
this is the re-assembled pulley / drum. Clearly been "repaired" once before! but this time I want to fix it right.

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Actually, that looks salvageable. I'd consider repairing it if a replacement wasn't at hand. Just need to use some better epoxy or Superglue or Gorilla glue. Depends on whether you are ok with the survivor look.
 
There is a piece missing completely on the back, and the previous work done the first time it broke didn't rough up the smooth plastic first; I'd have to chip away all the old epoxy, and I don't have much faith in the long term integrity of such a repair. I'd rather source a replacement, and have confidence the part was going to hold up for the next decade or so!
(That said, TIm, repair is certainly Plan B!)
 
have to agree with @ConradH that this looks like a great candidate for a 3D print job. If you know anyone doing that, you should be able to have one made without much fuss.
 
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