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Hello Gents.
I am looking for lead(s) on a Mod shop that works with Sony Vintage Amps.
Looking at modding a TA-80 ES . I have it set up with Sony TA707 ES CD player, Sony TA-777ESD preamp, and I like the sound.
Thank you for the info.
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That integrated is a very fine stereo. Sony was making some very nice stuff around that time. Many of those Sony's reminded me of the Luxman in sound and quality. Which is a very high priced audiophile brand. Sometimes I think that Sony and Luxman shared designs or co-produced or relabeled each others gear.
I think it was built around 1990???? So I would leave the caps alone for now.
Perhaps one day when you do enough research you could plan out what caps go where. Then go for it. But if you start messing with it now bad things CAN happen.
Enjoy it a little longer and get a plan going first. Don't modify the original circuits. There are many big mouths out there giving some pretty BAD advice.
enjoy
charles
Ditto.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
The Sony ES use very good caps are DC coupled in the critical areas so there nothing you are going to mod in the amps by nature of design..You may be able to upgrade some caps,but Sony was very meticulous in choosing very good caps for the Espirit series amps and preamps and all you will end up doing is making things worse if you go in and try to alternate bias points..
What a lot of so called mods consist of is a capacitor or diode change. I redid s Plinus amp 2 years ago where the guy sent to some place in New York and 1200 dollars later the amp sounded like it was out of phase and had a hump in the bass at 35 cycles..All I did was put it back to original and the guy was never so happy. They had these little perforated boards hanging off the B+ rail and one by every push pull pair of output transistors.They had like 6 parts on each and when I called the guy who did the supposed mod,he claimed it was a mod they no longer do because they found a better one with fewer issues.It supposedly added better regulation to the B+ supply but the amp already has superb regulation.There are a lot of people out there pulling this kind of shenanigans so beware.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
Edits: 08/07/16
Michael
Thank you for that answer of wisdom and truth. Since you have a wealth of knowledge ,
and I am starting in the hobby, the question is: would you change the capacitors, since the amp is fairly old, and those might need to be changed? If so, what capacitors would you recommend? Or would you leave it alone and look at upgrading amplifier?Thoughts?
Thank you kindly.
Nichicon also has a gold series and Philips has the BC series which I really like.The caps I would change would be the main power supply input filter caps..There,you would be a little more creative and use a more exotic type cap there as well as in the power supply sources.These amps already use Schottky diodes but I need to look at the schematic again to see what are the best caps to use and where.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
Mike what do you think about these in the signal positions.
I've been using these on my SS amps in signal path positions. Wonderful clean clear sound. None of the old lytic sound we all knew and hated. Very natural sounding.
I love those caps..I use them as cathode bypass and as couplers in SS amps.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
20 or so year old power supply electrolytic caps. are legitimate candidates for replacement. Panasonic and Nichicon are go to brands for those kind of parts. Look for combined low ESR and 105 o C. specifications. A high ripple current rating is good too.
Don't buy off "EBone". Get the genuine article from Mouser.
Eli D.
You can try contacting Mike Zuccaro in California.You can TRY DeWick repairs but he's up to his eyeballs in work.
A lot of the techs that did this work are no longer doing it. Turns out people got pissed at the cost. This kind of work takes many hours with your head bent over in an unpleasant position. Seems people didn't like paying for their 30 plus years of experience, expertise, time, parts and general difficulty in doing most of this crap.
If it was so easy then why aren't there more doing it.
Edits: 08/05/16
It is amazing to me how little skill is valued these days.
Dave
the days of the "tech" are pretty much over. Young people are not being trained to diagnosis and repair even a basic discrete component stereo.
Repair tech programs only focus in on how to find the bad board and order a replacement bad board from the manufacturer.
When this generation of audio guys are gone I don't know what is going to happen to all these stereo components. Tubes included. The guys that post here are SAINTS when it comes to this stuff.
When this generation of audio guys are gone I don't know what is going to happen to all these stereo components. Tubes included. The guys that post here are SAINTS when it comes to this stuff.
The way vintage solid state is going up in price there will always be people to rebuild and repair it.People born in the 1980s are fixing and rebuilding tube and SS gear if you go on youtube..Charlie,keep in mind there has been a huge resurgence in vinyl and this is among kids who have never seen an LP some cases.They are also buying vintage receivers and amplifiers tube and solid state...Remember,we have a very big ally in the guitar market and that keeps it lucrative for all of us vintage audio lovers..
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
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