Re: Bad news, what has gone wrong?
Hi Andrea!
The CD must have a DC blocking capacitor...at turn on this capacitor need to charge ( at this moment you have the off set in your Electrocompaniet)...after that it work fine because the capacitor is charged and ther is no DC output from the CD...
Simple!
Andypairo said:
Hi Andrea!
The CD must have a DC blocking capacitor...at turn on this capacitor need to charge ( at this moment you have the off set in your Electrocompaniet)...after that it work fine because the capacitor is charged and ther is no DC output from the CD...
Simple!
stigla said:
AW60FTT is a relatively new amp, and the AW65 is rather old.....+10-15 years I think.
Had one some years ago, but sold it and bought a new AW60FTT....
Think I have the schematics for this..or definitly the AW100.....somewhere....can take a look/scan it if you still need it....
Andypairo said:
....and.....this is definitely wrong!!!!!. It should NOT be as high as this! I am not sure of the voltages on the AW65, but the AW100 operates with two voltages: +- 42V on the output-amplifier-stage, and a regulated +-52V for the voltage-amplifier-stage.
It's either wrong trafo, or just maybe....mounted for 110V, and running at 220V....don't know if this is possible thow...
Even with CAP's that could stand this voltage, the output-BJT's will definitely blow up if you push it...that is if there are only one pair of 2SC2681/2SA1141 on each channel.........but thats just me and my opinion....
Are you sure it's not dual voltages on this amp too...that would make sense.....+-35V for the output, and +-45V on the voltage amplifier-stage....typical ELECTROCOMPANIET you know....
PS: I've buildt one AW100 clone some 10-12 years ago, and it is still going strong...some groung hum but really powerful!...
BTW: bee careful and don't "loose" GND on the inputsignal.......it will most certanly kill your output. I used to connect GND on both right and left toghether inside of the amp, just to provent a "dicaster" if one of the RCA-jack's should get loose/ defective etc.
Hmmmm.....strange!!!!
I have just gone trough my papercopies of the schematics, and this amplifier-board dosn't belong in this amplifier!!!?
The board look alot like the "newer" AW-75 board, but it hasn't the right markings....
It's definitly not the original AW65 board....that I am quite sure of. It have totally wrong layout!!!
Just maybe it is two boards originally meant for a AW120, but I don't have the scematics for this....just the AW75, but I think they are pretty similar. Aprox same age...
Seems like there are/ should be extra output-BJT's located on the "originally equipped AW-75/AW-120" SERVO-board. (2SC2565/2SA1095)
As the AW-75 uses a total of 4 BJT's on each channel, the AW-120 would probably have 8 BJT's (my guess!...)
I have just gone trough my papercopies of the schematics, and this amplifier-board dosn't belong in this amplifier!!!?
The board look alot like the "newer" AW-75 board, but it hasn't the right markings....
It's definitly not the original AW65 board....that I am quite sure of. It have totally wrong layout!!!
Just maybe it is two boards originally meant for a AW120, but I don't have the scematics for this....just the AW75, but I think they are pretty similar. Aprox same age...
Seems like there are/ should be extra output-BJT's located on the "originally equipped AW-75/AW-120" SERVO-board. (2SC2565/2SA1095)
As the AW-75 uses a total of 4 BJT's on each channel, the AW-120 would probably have 8 BJT's (my guess!...)
BTW....if you decied to use the cabinet and supply for another DIY amplifier, give me a hint (mail ), and I might be interested in buying the AW-120 boards....
..and if not, I have some scematics that could be handy!?
PS! If this amp is in a good/ right condition it will play music just exellent!!!! Beautiful sound, especially the vocals and higher frequencies......!
All the best!
LYRA
), and I might be interested in buying the AW-120 boards......and if not, I have some scematics that could be handy!?
PS! If this amp is in a good/ right condition it will play music just exellent!!!! Beautiful sound, especially the vocals and higher frequencies......!
All the best!
LYRA
Hello Lyra,
as stated in the first posts the guy who modified it (but it rather seems that he built it from scratch, even if with original Electrocompaniet boards....) claimed that the boards were identical to a higher power amp, my friend remembers "AW100" but it can be the 120 as well...
The outputs work at about +/- 45V (so I had to change the reservoir caps with 80V types), the preamp section runs at about 62V, and definitely there is just one pair of output devices.
I also think that they should be at least doubled.
Note that the guy is an official Electrocompaniet repairer
Anyway if you have a schematic I'd gladly receive it, my email address is andrea.pirovano@libero.it
It came to my mind to remove everything but the supply and to put a Lynx amp inside it (I'm sure ACD would appreciate ) but I don't think my friend would like it... anyway I can ask him if he is willing to sell the boards (you can send me a eventual offer along with the schematics if you want )
Cheers
Andrea
as stated in the first posts the guy who modified it (but it rather seems that he built it from scratch, even if with original Electrocompaniet boards....) claimed that the boards were identical to a higher power amp, my friend remembers "AW100" but it can be the 120 as well...
The outputs work at about +/- 45V (so I had to change the reservoir caps with 80V types), the preamp section runs at about 62V, and definitely there is just one pair of output devices.
I also think that they should be at least doubled.
Note that the guy is an official Electrocompaniet repairer
Anyway if you have a schematic I'd gladly receive it, my email address is andrea.pirovano@libero.it
It came to my mind to remove everything but the supply and to put a Lynx amp inside it (I'm sure ACD would appreciate
) but I don't think my friend would like it... anyway I can ask him if he is willing to sell the boards (you can send me a eventual offer along with the schematics if you want )Cheers
Andrea
Lyra said:Scanning the scematics now....but the scanner is old and slow.
Was thinking...You could use the boards as is, but you should change the trafo to a smaller one...like the one in AW-60FTT. This amp has only one pair of output-devices.
....better safe than sorry.......
This could be a idea, the problem is to find a properly sized trafo with the right secondary voltages...fortunately my friend isn't a fan of great dynamics but his speakers have fairly low impedance (he has a set of Sonus Faber Minima Amator and a pair of Rogers LS3/5A)... adding a pair is a no-no as I don't know where to source those BJTs and where to place them.. maybe the MJL1302/3281 can be a substitute?
Cheers
Andrea
Yes...maybe!?
The newer AW-60FTT uses 2SC3281/2SA1302 BJT's
and this is then again altered in the newest version to some Motorola BJT's, but don't know whitch yet.
Maybe someone know where to get hold of an original AW-60FTT trafo. You can always have it special-made, but this will be costly, or you can simply use two trafo's with the right output-voltages on each....the one with highest voltage don't have to be very big (in VA)...think 1-3 amperes should be sufficient....
The newer AW-60FTT uses 2SC3281/2SA1302 BJT's
and this is then again altered in the newest version to some Motorola BJT's, but don't know whitch yet.
Maybe someone know where to get hold of an original AW-60FTT trafo. You can always have it special-made, but this will be costly, or you can simply use two trafo's with the right output-voltages on each....the one with highest voltage don't have to be very big (in VA)...think 1-3 amperes should be sufficient....
I've been trying too mail the file(s), but I have got some error messages.....to big file etc. I am trying again right now, but in the future it would be a lot easier if there where some space where it could have been uploaded to, and where You could download it from. Any suggestions....dont have to be for more than 10-14 days!?...or?
The whole (?) file is just below 10MB....
The whole (?) file is just below 10MB....
Regarding the transformer, and the required voltage see: http://www.anidian.com/audio/construct/p3a_1.shtml
....Nice calculator that could be helpful !?
....Nice calculator that could be helpful !?
Lyra said:Sorry....don't have it, but I could try to get my hand on it...
All the best!
Lyra
Hi!
It was worth a try! I have a broken ECI-1 laying around. Haven`t tried to fix it yet. Probably just a softstart or output relay because there are some "clics" missing on start up and no sound at all.
Probably an easy fix even without the schematics.
I remember 4-5 years ago Electrocompaniet was extremely service minded. I had some problems, and they answered my mails fast, sendt drawings, etc......
Now they don`t bother to answer any of my mails, or if they do it can take two weeks.
You don`t have any clue whats in the upgrade kit for this amp?
I`ve heard that the upgrade kit they offer for ec4.6 costing 228 euro is mostley mur diodes costing under 10 euro at RS.
Regards
Tor Martin
<You don`t have any clue whats in the upgrade kit for this amp?
I`ve heard that the upgrade kit they offer for ec4.6 costing 228 euro is mostley mur diodes costing under 10 euro at RS.>
No...I dont know. Have been trying too find out the same regarding my EC 4.5 Preamp. And my EC AW60FTT amp. Haven't been lucky yet, but I havent given up.....
Anybody else know something about this ????
I`ve heard that the upgrade kit they offer for ec4.6 costing 228 euro is mostley mur diodes costing under 10 euro at RS.>
No...I dont know. Have been trying too find out the same regarding my EC 4.5 Preamp. And my EC AW60FTT amp. Haven't been lucky yet, but I havent given up.....
Anybody else know something about this ????
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