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fisher amps,receivers use what output transformer?

J

jstraw

Active Member
I have a fisher x 100-c that uses a 7868 output tube.I have a blown output transformer.There are currently none available on ebay or anywhere i have searched?
Will a fisher 400 trani work?It uses the same output tube.It looks the same too.Different part number though.
It seems there's a ton of 400's out there but no 100-c's
What are the spec's for a fisher 7868 transformer.
I also have bee looking at hammond replacement transformer's but i'm not sure of the number of turns on a fisher trani.
Hammond seem to come in 5000 cts or 6600.
Would a 500c output tranformer be a upgrade?They are bigger but made for different output tubes 7591's.
I have read there is very little difference in a 7868 abd a 7591.Just the base.
I want a fisher trani not a hammond i'm just wondering what my options are?
 
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IIRC The 400 receiver uses wider output transformers. The ones on the 500C are wider still. You might want to look for X-100B/KX-100 outputs which are probably the same as yours.....and it seems like there were more of those units out there.
 
Wider will fit and i'm not afraid to drill a few holes.
It seems the 500c trani's are the most plentifull.
It's the internal differences i'm worried about.
How many turns the different transformers have.
My x 100-c sounds so much better than my 500c it's not even fair.
The 100-c played louder too even though it's supposed to be 10 watts less with smaller by half tranformers.
I'm also wondering how many turns a 7868 tube needs.
The hammond catalog does not list that tube for their transformer's.
 
jstraw,
You should look for the same. I have a 500-C and an X-200. They use similar iron for 7591s, but the 500-C mounts them with the iron down with bolts placed at the bottom, and the X-200 mounts them with one side of the bell down with mounting bolts placed on the bottom. So they're mounted 90 degrees off from one another. The integrateds are optimized for miniaturization.
Have patience and you will find one.
 
I would take Dadbars advice.

The amps he listed are in the "same family" and use 7868s and have the similar power rating.

I agree that an exact match would be ideal - but good luck! I think the bay has a parted x 100 that ends in a few days but is already nearing $100 shipped.
 
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