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So new (used) preamp showed up and my xlr to ts cable showed up and now I have vocals. Wow, the old preamp, every thing worked but the mic circuit. Weird, but I am not the original owner.. I sure did learn a lot here, as for the op amps they are soldered in so they will stay. I may want to have...

I have rung out my xlr to trs cable, looking at the female xlr end 2 is left, 1 is right and 3 is below. And I have 2 to the tip, 3 to the ring and 1 to the sleeve. The trs to ts adaptor seems incorrect. It has 2 and 3 at the tip and 1 on the sleeve. I have a xlrf to ts cable coming in the mail...

Thank you Dave. I scored the Pa 7000 on eBay. So I will have the second one to experiment with. I will look into the book.

I am attempting to acquire a second Gemini PA 7000. That way I can test for similarities and differences. Plus I really like this preamp and I’ll have spare parts and I’ll be able to experiment with upgrading the Op amps. The thing I really don’t know is if this input is balanced or unbalanced (...

Thanks I’ll try that tomorrow

I have tried a guitar cable and yes I do hear a hum when I touch the tip. The mic level does not change the hum but the volume output of the preamp does change the hum. Also I looked inside the unit the mic jack is in a plastic modular case with a clear top and I could absolutely see a set of...

I have a older Gemini PA-7000 preamp. I tried to use the mic jack and nothing but a pop, when the mic is plugged in, and as I start to turn the mic level up, then nothing. I am trying a Behringer xm8500 dynamic mic, a xlrf to 1/4" trs cable. Then I added a 1/4" trs to ts adaptor and the same...