Fisher 400 - can all 9 can caps fit under the chassis ?

kappclark

kappclark

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Looking at the service manual, I counted 9 caps total in the cans of the Fisher 400 (c52 C57 C60)

I have read through THIS THREAD started by @Dave451 back in 2018 and it looks like there is a way to get everything tucked in, including the bias caps..(excellent postings- I am still digesting it)

Has anyone else tried this ? I would prefer not to drill the chassis to remove rivets..Is the additional board required ? I was not clear on this ..
 
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The board is the IBAM bias control for setting the bias level for each output tube. It is not strictly necessary but is a nice feature to add. As you see, the individual caps will fit under the chassis if you locate them as shown.
Dave
 
kappclark said:
Looking at the service manual, I counted 9 caps total in the cans of the Fisher 400 (c52 C57 C60)

I have read through THIS THREAD started by @Dave451 back in 2018 and it looks like there is a way to get everything tucked in, including the bias caps..(excellent postings- I am still digesting it)

Has anyone else tried this ? I would prefer not to drill the chassis to remove rivets..Is the additional board required ? I was not clear on this ..
Click to expand...

That's a great thread. A master class for restoring a Fisher 400.
 
Kapp. No need to drill out rivets to change out the cardboard covered can cap. You're gonna toss them anyway, just twist them parallel to the phenolic, and grind them off with a dremel. If you're careful you won't nick or damage the phenolic wafer. Remove from wafer and install new one.
 
Yea, I didn't think they'd last long at that give-away price. Glad it'll help another 400 come to life.
 
The funny thing is I actually enjoy building these things. It's like a simple puzzle or simple Rubric's Cube. It forces thinking in several dimensions which I actually enjoy. Kinda like Zen and the Art of Motorcycle Maintenance; seeing the "essence" of stuff, in this case a "can cap." Good thing I still got a day job tho! Because if I relied on "Zenning out," given the time, and materials involved, I'd go bankrupt as a businessman. Anyway, it ain't about the money and I too am glad it's going to bringing another Fisher back to healthful life!
 
I hear you ND. I love stuffing cans and I find it fun and puzzling too. Like building a model airplane when I was a kid. It's the first thing I do when I restore a piece of gear.

Someone asked on another thread if new filter/smoothing can caps helped with the SQ. In my experience I'd have to say yes. A fresh power supply just seems to add a sparkle to the sound.
 
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