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[Buzz]

I have 2 1176ln's rev H and the 1176-SA stereo adaptor I trried hooking it up today following the directions in the manual and got wierd results , one unit would peak the meter and the other would be OK no meter peaking , I switched the rca's and got the reverse results.

Any ideas guys

LAter
Buzz

PS: looking at the schematic's it appears that the SA sends a 9vdc bias to the output/gain reduction stage and the FET Q1 ?? both units get 9vdc

[Buzz]

No ideas I take it ?? I sent UA an e-mail to see what the problem is , I;ll report back with the fix later

Buzz

[Jakob Erland]

Shouldn't be 9V - but a good deal less than that.

There is a trimmer or a pot that lets you adjust tracking of units (by providing a bit of differential FET gate offset voltage). It's not plug-and-pray, but adjustable.

Your unit may have it either adjusted all way up, or you have a broken pot.

Jakob E.

[Buzz]

Thanks Jakob I did adjust the pot to no avail ?? , I tested the outs of the unit and there is 9vdc between the center of the rca's but 0vdc from the center to ground ? and the pot had no effect in either case. I will test the pot tonight

LAter
Buzz

[Jakob Erland]

Original Urei 1176SA manual w/ schematic:

http://www.groupdiy.twin-x.com/albums/userpics/10004/1176SA. pdf

- There should be no voltage (nor connection) between in/out jack tips relative to ground(s).

- The pot should simply adjust a DC voltage difference between the two jack tips - nothing else.

- Urei used a 1.4V battery - that difference voltage should be plenty for all but the wierdest-adjusted 1176's.

Jakob E.

[Buzz]

The unit I bought from them brand new has a 9v battery in it maybe it's wired wrong ??? I'll check it , I have heard from them but they are just aksing is the battery good ? Ya dude I measured it with a volt meter !! , so I have asked them to forward my ? to engineering

LAter
Buzz

PS: thanks for all the help Jakob !!!

[Buzz]

Ok so UA does'nt know shit about the 1176-SA or even the 1176ln ????? I can't talk to an engineer or even a tech ??? , so any help here would be great

Later
Buzz

PS: when I plug in the Sa to the 2 1176's one unit PEGS the meter the other goes to about half way ( -10db or so ) any ideas , they want me to send the SA back in for testing/troubleshooting