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Help with Retro (no sound)

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jaggel		#21 Posted : Monday, January 13, 2014 8:00:54 PM(UTC)
Rank: Member Groups: Member Joined: 11/25/2013(UTC) Posts: 17 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?


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jaggel		#22 Posted : Monday, January 13, 2014 8:03:55 PM(UTC)
Rank: Member Groups: Member Joined: 11/25/2013(UTC) Posts: 17 Thanks: 1 times		Now I saw benpe's response.... It might be more difficult than I thought... :-\|


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phy1970		#23 Posted : Friday, February 21, 2014 3:38:19 PM(UTC)
Rank: Member Groups: Member Joined: 7/15/2011(UTC) Posts: 24 Location: Denmark		Hi It seems as I also have RETRO boards with 2OPA1632 and 1OPA1642 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
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Brian Donegan		#24 Posted : Tuesday, February 25, 2014 3:40:33 PM(UTC)
Rank: Administration Groups: Administration, Customer Joined: 10/24/2006(UTC) Posts: 2,868 Location: Massachusetts, USA Thanks: 2 times Was thanked: 141 time(s) in 134 post(s)		Replacement sent.
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phy1970		#25 Posted : Monday, March 3, 2014 7:32:40 AM(UTC)
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
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Brian Donegan		#26 Posted : Monday, March 3, 2014 12:21:44 PM(UTC)
Rank: Administration Groups: Administration, Customer Joined: 10/24/2006(UTC) Posts: 2,868 Location: Massachusetts, USA Thanks: 2 times Was thanked: 141 time(s) in 134 post(s)		Try leaving the audio ground floating.
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