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Calling All "Vintage" Integrated/Receiver Owners - Page 711

post #10651 of 16760
Quote:
Originally Posted by brunk View Post
 

@ssrock64 - I see the oxidizing on the coil, not really a big deal. You can just clean it off. However, it appears a resistor has gone bad, and possibly took some of the capacitor with it when it sparked off. I would get that replaced if I'm seeing it correctly in the picture. :)

If that is part of the tuner board, then it is most likely not the cause of the problem you are hearing - unless of course it only happens when using the tuner.  That said would be good to have it checked out.  If the problem always gets better after sitting, unused, a while - could be a thermal issue too.

post #10652 of 16760
Quote:
Originally Posted by LugBug1 View Post
 

I do love that amp of yours! Sitting there dressed in its oak finery. 

 

 

Heres my European equivalent, exactly the same but no wood... Naked.. Thats why its hiding in the stand ha

 


Actually, with the HD800 and laptop with glass and chrome rack your 508 without wood looks just right.

post #10653 of 16760
Quote:
Originally Posted by palmfish View Post
 

 

My SA-5800 photo as promised...

 

 

 

She pretty.

The guts/architecture are surprisingly different considering these entry integrated amps are only a couple of generations apart.

 

I do think the SA-7100 architecture is very elegant and straightforward.

 

Also has a shield to isolate the pre-amp section.

post #10654 of 16760
I love the look of the fluoroscan era Pioneer integrateds. I've never owned one, but I have a Pioneer cassette deck with fluoroscan meters that I just adore - both look and sound.
post #10655 of 16760
I had the Pioneer SX D7000 for a while. It sounded quite good, but got rid of it due to some background noise issues. This unit straddles the line between the classic silver face era and the long "Dark Ages" . They had very delicate front panels of near paper thin aluminum so its hard to find a mint one without a few dings. They also run HOT... Almost tube amp hot.
Loved the fluoroscan meters and overall look.
post #10656 of 16760
Just a comment on cold solder joint issues. Bad joints are not always easily seen with the naked eye.

My Spec 2 amp took three tries to solve an intermittent issue because the first two techs did only a cursory fix. It took my new tech re soldering the entire amp board to solve the issue.
post #10657 of 16760
^ After doing any soldering I always check each joint at least twice with a magnifying glass.
post #10658 of 16760
Quote:
Originally Posted by parbaked View Post

She pretty.
The guts/architecture are surprisingly different considering these entry integrated amps are only a couple of generations apart.

I do think the SA-7100 architecture is very elegant and straightforward.



Also has a shield to isolate the pre-amp section.


Yes, you're right. I remembered the transformer and big caps, but the layout of the boards and heat sinks does look nicer on the 7100.
post #10659 of 16760

I'd never seen inside a 5800! 

The X800s had a lot of new technology to including a non-switching amp designed that was very efficient, low heat and VERY low distortion.

This got THD down to 0.03% on the SA-5800 v. 0.5% on the direct coupled SA-7100. Huge difference on paper!

I guess that efficient design didn't need heat sinks. It is good to see the big caps and tranny!

By that time, specifications were all important in marketing/selling audio.

I think this is where the sound lost some of the warmth (but became more accurate) of the earlier amps.

 

Gotta love that Pioneer!


Edited by parbaked - 11/16/13 at 8:50am
post #10660 of 16760
Quote:
Originally Posted by Skylab View Post

I love the look of the fluoroscan era Pioneer integrateds. I've never owned one, but I have a Pioneer cassette deck with fluoroscan meters that I just adore - both look and sound.

 

:thumb: Now that my 1980 Pioneer SX-D7000 has been serviced due to Fluoroscan meter being intermittent, the display offers a nice contrast to the other iron in the room.

 

 

 

Quote:
Originally Posted by Argybargy View Post

I had the Pioneer SX D7000 for a while. It sounded quite good, but got rid of it due to some background noise issues. This unit straddles the line between the classic silver face era and the long "Dark Ages" . They had very delicate front panels of near paper thin aluminum so its hard to find a mint one without a few dings. They also run HOT... Almost tube amp hot.
Loved the fluoroscan meters and overall look.

 

I may have to fire mine up (D7000) 'cause I don't ever recall it running HOT. Of course, that's not to say it does not. Quite likely I could have been preoccupied by good music. 

 

Still.... :biggrin: now you have me curious, so tonight!

post #10661 of 16760
Quote:
Originally Posted by Skylab View Post

I love the look of the fluoroscan era Pioneer integrateds. I've never owned one, but I have a Pioneer cassette deck with fluoroscan meters that I just adore - both look and sound.

Apparently you are not the only one...

LEAD Technologies Inc. V1.01

 

LEAD Technologies Inc. V1.01

 

LEAD Technologies Inc. V1.01

(images borrowed from AK)

post #10662 of 16760
Quote:
Originally Posted by Silent One View Post
 

 

:thumb: Now that my 1980 Pioneer SX-D7000 has been serviced due to Fluoroscan meter being intermittent, the display offers a nice contrast to the other iron in the room.

 

 

 

 

I may have to fire mine up (D7000) 'cause I don't ever recall it running HOT. Of course, that's not to say it does not. Quite likely I could have been preoccupied by good music. 

 

Still.... :biggrin: now you have me curious, so tonight!

Find the hiding D7000:

post #10663 of 16760
I may have to fire mine up (D7000) 'cause I don't ever recall it running HOT. Of course, that's not to say it does not. Quite likely I could have been preoccupied by good music. 

Still.... biggrin.gif  now you have me curious, so tonight!
[/quote]

Possibly the heat was related to the minor noise issues, but I didn't have another unit to compare to. Pioneer used a "Vari-Bias" circuit which was supposed to emulate Class A, this probably is the source of the extra heat. Interestingly the massive transformer is located all the way on one side of the case, with the big heatsinks also on one side.
Makes for a very lopsided load when trying to carry the thing.
So all the heat should be on one side of the case.
post #10664 of 16760
Quote:
Originally Posted by Argybargy View Post



Possibly the heat was related to the minor noise issues, but I didn't have another unit to compare to. Pioneer used a "Vari-Bias" circuit which was supposed to emulate Class A, this probably is the source of the extra heat. Interestingly the massive transformer is located all the way on one side of the case, with the big heatsinks also on one side.
Makes for a very lopsided load when trying to carry the thing.
So all the heat should be on one side of the case.

:dt880smile:

I know what you mean! The transformer is located in the left rear corner. I had 2" Isoblocks (rubber/cork) underneath around the corners and the amp always leaned (dipped?) in that corner. Haven't been able to un-squish the po' lil' thang yet!

 

Now that you reminded me of the layout, I believe you're correct in that it runs hot.

post #10665 of 16760
Quote:
Originally Posted by parbaked View Post
 

Find the hiding D7000:

:rolleyes: For an owner w-a-y 2 easy!

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