Fisher TA-600

[NYListens]

I am almost finished with the Fisher 500-S and my next project will be a TA-600. I am looking at the schematic and I am surprised at how different it is from the 500-B and 500-S that I worked on. The power stage is tube rectified and I have never worked on such a set up. In both of my prior rebuilds, I just replaced the electrolytic caps in the beginning of the power stage in the B it was two 1000uf caps and the S had two 100uf caps. I think I will replace the three caps in C1 of the TA-600 which are two 40ufs and one 20uf caps. Anyone have experience with this unit that would like to share your opinions? Thanks.

 

[Tinkerbelle]

What about all the other electrolytics in there? The 40/40/20/20 can is from the GZ34 rectifier, but then there is the 40/40/40 from the EZ81, plus a 10/10/30/30 and a good number of individual ones. There's a ton of molded caps to do in there too in some nice tight spaces.

Have fun with that! :thmbsp:

 

[NYListens]

What about all the other electrolytics in there? The 40/40/20/20 can is from the GZ34 rectifier, but then there is the 40/40/40 from the EZ81, plus a 10/10/30/30 and a good number of individual ones. There's a ton of molded caps to do in there too in some nice tight spaces.

Have fun with that! :thmbsp:

Yes, it is by far the tightest I have seen. On the caps, I only want to replace the bare minimum for the electrolytics. I hate when the bottom of the chassis is littered with them. If they need to be replaced I will, but I wanted to only replace the critical ones first.

 

[Johncan]

Brassteacher (Don) and GordonW worked on two of them from me. You may want to contact them. The Fisher 600 is a great receiver.

John

 

[NYListens]

Brassteacher (Don) and GordonW worked on two of them from me. You may want to contact them. The Fisher 600 is a great receiver.

John

Thanks. Yes, I can't wait to hear it. I don't think Fisher made 1 poor tube receiver.

 

[loadrecords]

i am a new Poster, Ben McOsker, and working on the same project... if anyone has a list of caps needing replacing, i'd love to be included.

 

[NYListens]

i am a new Poster, Ben McOsker, and working on the same project... if anyone has a list of caps needing replacing, i'd love to be included.

Do you have the photofacts for it? Sometime in the next week or two I plan on getting under the hood and looking at the photofacts to figure it out. Perhaps we can compare notes?

 

[loadrecords]

i ordered Sams schematics on this and should have them real soon and would certainly be willing to share them. Should have them tomorrow. I ordered 4 7189 tubes, a GZ 34, and a silicon bias bridge. waiting on the specs to order the Orange Drop caps i'd need to finish this amp i saw just sitting on a curb. In great shape other than a few tubes.

Best,
Ben McOsker

 

[NYListens]

i ordered Sams schematics on this and should have them real soon and would certainly be willing to share them. Should have them tomorrow. I ordered 4 7189 tubes, a GZ 34, and a silicon bias bridge. waiting on the specs to order the Orange Drop caps i'd need to finish this amp i saw just sitting on a curb. In great shape other than a few tubes.

Best,
Ben McOsker

It is tube rectified and I don't think you will need the silicon bridge.

 

[NYListens]

What about all the other electrolytics in there? The 40/40/20/20 can is from the GZ34 rectifier, but then there is the 40/40/40 from the EZ81, plus a 10/10/30/30 and a good number of individual ones. There's a ton of molded caps to do in there too in some nice tight spaces.

Have fun with that! :thmbsp:

I took another look under the hood today. It looks like a real female dog under there. There are molded caps a few small electrolytics everywhere along the signal path and they all look like the person who put them there was doing their darnedest to make them unreachable. I think I will also re-wire it to take 6u8s instead of the outlandishly expensive 7199s.

 

[Tinkerbelle]

I took another look under the hood today. It looks like a real female dog under there. There are molded caps a few small electrolytics everywhere along the signal path and they all look like the person who put them there was doing their darnedest to make them unreachable. I think I will also re-wire it to take 6u8s instead of the outlandishly expensive 7199s.

There's a good amount of work to do there. I was looking at AES; seems like they have 40/40/20/20 and 40/40/40 multi-section cans. If it was a real junk receiver it would be tempting to just do the amp and preamp, and convert it to a real nice integrated - but these Fishers are pretty, and good performers.

 

[NYListens]

There's a good amount of work to do there. I was looking at AES; seems like they have 40/40/20/20 and 40/40/40 multi-section cans. If it was a real junk receiver it would be tempting to just do the amp and preamp, and convert it to a real nice integrated - but these Fishers are pretty, and good performers.

Yes, they are certainly good performers and I can't wait to listen to the 600. Cosmetically, the 600 I got is in fabulous shape. There is just a little bit of rust/pitting on the face and only a smidgen on the chassis.

 

[Tinkerbelle]

Yes, they are certainly good performers and I can't wait to listen to the 600. Cosmetically, the 600 I got is in fabulous shape. There is just a little bit of rust/pitting on the face and only a smidgen on the chassis.

You're lucky. The face on mine is nice but the chassis has it's challenges; it's cleaning up though. This one was very much neglected, one OP transformer was out, terrible caps, rough pots, no tubes, no tuner string, nothing much worked, so it's a slow recovery process. It's in a semi-working state right now, so it's on the road to recovery.

 

[NYListens]

You're lucky. The face on mine is nice but the chassis has it's challenges; it's cleaning up though. This one was very much neglected, one OP transformer was out, terrible caps, rough pots, no tubes, no tuner string, nothing much worked, so it's a slow recovery process. It's in a semi-working state right now, so it's on the road to recovery.

Mine came tubeless too. I believe the person sold them. My 500-S has a broken AM string and the face and body are fairly rusted. However, most of the tubes were in good shape. By the way, I purchased brand new 6P14P tubes off of e-bay (let me know if you want the seller) and they work great in my 500-6. The rest of the tubes I am going to have to buy piecemeal.

 

[Tinkerbelle]

Mine came tubeless too. I believe the person sold them. My 500-S has a broken AM string and the face and body are fairly rusted. However, most of the tubes were in good shape. By the way, I purchased brand new 6P14P tubes off of e-bay (let me know if you want the seller) and they work great in my 500-6. The rest of the tubes I am going to have to buy piecemeal.

Thanks. I have a number of other amps and receivers that use 6BQ5 or 7189 tubes, so I have spares. BTW, for the Russian tubes I prefer the 6P14P-EV over the regular 6P14P, for higher voltage and longer life, especially where they are replacing 7189 tubes.

 

[NYListens]

Thanks. I have a number of other amps and receivers that use 6BQ5 or 7189 tubes, so I have spares. BTW, for the Russian tubes I prefer the 6P14P-EV over the regular 6P14P, for higher voltage and longer life, especially where they are replacing 7189 tubes.

Thanks for the info.