Arcam Delta 290

[lduarte1973]

I´m trying to fix my old Arcam Delta 290 Amp. Can anyone send me the service manual or schematics ? my email is : luis73@netcabo.pt

Thanks !!

 

[aparatusonitus]

Hi lduarte1973,

Please, check your mail.

 

[lduarte1973]

Arcam delta 290

hi aparatusonitus , many thanks for such fast reply !!!

 

[voxxonline]

Hi
I don't want to start a new thread so pardon.

I have old Arcam delta 290 Power amp.
I do not use it currently and was planning to sell, but I have an idea of tweaking it a bit with newer parts and see if any change to the sound occurred.
Can I ask members of this forum is there any particular component upgrade or swap for new one would bring benefit of improved sound ?

I have attached service manual and few pictures (big) @ dropbox .

https://www.dropbox.com/s/sdxhmww71q2ire1/IMGP2610.JPG

https://www.dropbox.com/s/op053pji9jgekd1/IMGP2612.JPG

https://www.dropbox.com/s/7qw7wp415uc6sz6/IMGP2616.JPG

Service manual

Thank you

 

[lduarte1973]

replace the 2 big capacitors with 12000mf 63v will give more power and better bass , i didnt do anything else

 

[voxxonline]

sure. 12000 to 15000 would make a difference.
what about those caps on speaker output tabs ?

 

[lduarte1973]

should bring some improvement , i use mine as mid-bass amp only (85-800hz) and i´m satisfied thats why i didnt go any further .

 

[voxxonline]

Has anybody got more ideas what to do ?

 

[lduarte1973]

you can always replace the ne5332 opamps but dont expect major improvement

 

[KatieandDad]

As I can't see the schematic I'm shooting off the hip a bit here.

Most of the Arcams were Class A/B Mos-Fet designs with single complimentary P-Type + N-Type outputs.

These can generally be improved upon by 1). Increasing the solidity of the PSU which has been discussed above and 2). Doubling up the output devices which improves the damping factor and the output impedance.

 

[KatieandDad]

you can always replace the ne5332 opamps but dont expect major improvement

Just check where they are in the circuit. If they are only in the servo loop you won't hear any improvement.

 

[voxxonline]

Schematic is attached as service manual on dropbox

 

[KatieandDad]

Still can't get it to open.

 

[voxxonline]

Sorry I am away from pc so could not upload it again. Will do tonight. Thanx for helping

 

[Ian Finch]

You could download the manual directly with a lot less messing about than needed to use "Pop-up box".
Try hi-fi engine: Arcam Delta 290 | Owners Manual, Service Manual, Schematics, Free Download | HiFi Engine

 

[voxxonline]

I have it. Just mistakenly uploaded dummy file

 

[voxxonline]

Here is a service manual.
It is for integrated but I have power amp only but schematic is the same sans integrated.

 

[Bare]

Most of the Arcams were Class A/B Mos-Fet designs with single complimentary P-Type + N-Type outputs.

These can generally be improved upon by Doubling up the output devices which improves the damping factor and the output impedance.

OK... What are these devices exactly and erm... Where are they ?

 

[jaycee]

OK... What are these devices exactly and erm... Where are they ?

To be honest, don't touch.

If you must do anything, renew the power supply capacitors, and perhaps all of the electrolytic capacitors. Leave the rest alone

 

[voxxonline]

Sure, thx