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jaggel  
#21 Posted : Monday, January 13, 2014 8:00:54 PM(UTC)
jaggel

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Posts: 17
Greece

Thanks: 1 times
Brian thanks for your prompt response...
I am currently waiting for my, all new, rework/soldering station to arrive and I will try to use it to change them myself... I know I might fail but I will give it a try...
Anyway is there any way I can check the opamps to find out if I fried them already?
jaggel  
#22 Posted : Monday, January 13, 2014 8:03:55 PM(UTC)
jaggel

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Greece

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Now I saw benpe's response.... It might be more difficult than I thought... :-|
phy1970  
#23 Posted : Friday, February 21, 2014 3:38:19 PM(UTC)
phy1970

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Joined: 7/15/2011(UTC)
Posts: 24
Location: Denmark

Hi

It seems as I also have RETRO boards with 2*OPA1632 and 1*OPA1642 and with the OPA1642 mounted in the input/output-end and OPA1632 in the middle and at the PWR end of the PCP.

I am not able the fix that by myself.

No wonder it didn´t sing.

What can I do?


Regards

Peter
Odense
Denmark
Brian Donegan  
#24 Posted : Tuesday, February 25, 2014 3:40:33 PM(UTC)
Brian Donegan

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Replacement sent.
phy1970  
#25 Posted : Monday, March 3, 2014 7:32:40 AM(UTC)
phy1970

Rank: Member

Groups: Member
Joined: 7/15/2011(UTC)
Posts: 24
Location: Denmark

Thank you very much..superservice.

The retro is up and running with a sweet sound.

I do get at severe background hum though.

The GND lines are connected to true earth (a spear in my backyard) so I don´t get it.

Any tips, tricks or ideas?

The retros are powered by Placid Bipolar psus, also ground connected.

Anybody??


Regards
Peter
Denmark
Brian Donegan  
#26 Posted : Monday, March 3, 2014 12:21:44 PM(UTC)
Brian Donegan

Rank: Administration

Groups: Administration, Customer
Joined: 10/24/2006(UTC)
Posts: 2,868
Location: Massachusetts, USA

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Was thanked: 141 time(s) in 134 post(s)
Try leaving the audio ground floating.
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