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C-90a and German FTZ treatment

Meteli

Active Member
I am right now working on with Pioneer C-90a and it is Euro version and HEZ of those that was sold in West-Germany.
You can spot all audio gear that got "Evil Eagle of Audio Death" -logo on rear panel. This called FTZ tratment and it limits down ultra high frequencies to protect German audio gear sales. so basicly it is protectionism, to make Philips and Grundig any change against Japanese brands, hoping they do not enter market, because these extra parts needed.

So my question is; could someone confirm what parts are there behind "in" and "Out" terminals in USA (or any other market) sold C90a's?

My understanding is that "CD IN" is only jumpers and rest "IN" terminals got 470ohm(?) resistors, no capacitors?
On "OUT" terminals there are only jumpers?

I like to remove these FTZ capacitors, if they are not needed, but I am not sure if they even affect anything.

Few other parts are also missing
Here is picture what I have.
pioneer c90a euro.jpg
 
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I took them all out and replaced with jumpers and 10ohm resistors as are c91.
I think there must be manual of other then W-Germany C90a out there but all manuals that I can found are only with FTZ treatment C90a

ftz removed c90a.jpg
 
Happy to report; no issues, just take those capacitors out and replace with wire.
I also did little bit extra; those only electrolytic capacitors on signal line are now polypropylene 22uF caps that do fit in.
Changen rest electrolytics for Panasonic FR, soft recovery diodes to power suply and metal film through out signal line.
Also change to 240v as we seem to have 233v out of the wall socket
I don't listen vinyl, so did nothing for that board, maybe later...

pioneer c90a caps.jpg
 
Ciao From Italy I have a question for you if you are an expert on the C-90a ...... I have a problem when i turn ON the C-90a , all the led of for example subsonic filter goes on OFF .... I try to attach a video ....ciao
 
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