HELP! Rotel RA-1062 - Page 6 - diyAudio
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Old 8th March 2009, 08:00 PM   #51
Rbz5416 is offline Rbz5416  United Kingdom
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Join Date: Mar 2009
Quote:
Originally posted by homemodder
Send me mail through my mail link here with your email and Ill send it to you.
Thanks for the offer but as a new member, I'm not allowed to e-mail other members yet. My CP options are set to receive e-mail so hopefully you can send it that way?
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Old 8th March 2009, 11:37 PM   #52
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Join Date: May 2006
I have sent it to Jan Dupont who is kindly hosting it on his site, you could download it from there, I see he has already included it in his library. Here is the link,

RRwww.audio-circuit.dk/Schematics/Rotel-RA1062-int-sm.pdf
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Old 9th March 2009, 01:55 PM   #53
Rbz5416 is offline Rbz5416  United Kingdom
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Thanks very much guys.

Couple of spurious Rs in the link though!

http://www.audio-circuit.dk/Schemati...062-int-sm.pdf
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Old 9th March 2009, 01:57 PM   #54
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Oops, I had just returned from a party when I responded
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Old 12th March 2009, 01:07 AM   #55
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Location: Cameron Highlands
Default Rotel Ra-971mk2

Hi ALex,
Need some precious tips from u mate regarding some issues i'm having with my rotel ra-971mk2. Also tips on upgrading it pls. Have sent u an email.

Cheers,
Amuth
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Old 2nd January 2010, 12:53 PM   #56
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Default Rotel RA1060 probems

Hi,
I'm using this already open theme to ask and if possibly reslove several questions about my RA-1060.
I bought this amp fairly cheap, but since it has good potential, I would like to get maximum of it.
First opening revealed:

1. All this production run is obviously made using Panasonic FC, since my amp has not any Black Gate at all; the amp was never opened and solderet, it is clear.
The preamp is OPA2604, and for other pourpose (tone controls/headphones) there are two 2134s; in the schematics are listed here AD712.


2. DC offset is (to me) unacceptably high - 70mV and 60mV; often, it is said to be unmatched input transistors; I cannot order easy the original A1610/C2362K. Is there better transistors for this pourpose? Somwhere the Phillips BD139/140 are reccomended, but it seems to be overkill for that pourpose?

3. On first check, bias was some 2,5mV/0R22, too low; I make it stable to some 10-11mV, according to posts here, and althought it sounds a bit better - the older RA-971 blows it up, unmodded

4. How to change the sensitivity of the pot?
It is very difficult to adjust volume at low level, even at "8-9" o'clock, it is too loud...the pot is some Alps, motirized 50k unit, but not Alps Blue or slimilar class;


Any input appreciated

Last edited by eradoncic; 2nd January 2010 at 01:11 PM.
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Old 9th January 2010, 02:28 PM   #57
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Nobody?
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