Pro Audio Design Forum

Thanks JR. I suppose another advantage of fully-balanced might be 6 dB more headroom.

Sean - Thank you for joining us! Here's a post where we discuss using VCAs whose current outputs are directly summed into the mix amp: http://www.proaudiodesignforum.com/forum/php/viewtopic.php?f=6&t=211 IIRC the thread meanders a bit but at 16 pages it should keep you reading for awhile. There ...

I assume you mean keeping the same sort of network, and just floating it all, as opposed to doing a truly balanced network with 2x parts. This sounds worth hearing. I wonder what typical inductor headroom really is, and how much they differ comparing original versus the various clones, and then how...

What I was suggesting is a little different. What I'm proposing here is a hybrid Pultec with solid-state electronics that is (almost) fully balanced end-to-end. 1) Lift the ground line at the input transformer and remove the transformer. Receive the input with a 1246 as you've done already. 2) Here'...

So no 12AX7/12AT7 anywhere.

One of Eugene's patents at RCA deals with an AM modulator. He may have spent some time in their broadcast division. https://twin-x.com/groupdiy/albums/userpics/meq5_updated_2008~0.jpg I'd like to see someone try the MEQ/PEQ network driven differentially by a THAT1646 (or dual current-boosted pair of...

Doug - I did a patent search for Eugene Shenk and it appears that a large body of his work was in telegraph systems and pulse reconstruction/synchronization. Most of his work looks to be assigned to RCA. I never could figure out how an audio company in that era could wind up with a name of Pulse Tec...

You've got me curious about any non-audio work Pulse Techniques did. Wonder if they did military contracting...

Do you need 12.6V too?

Sure you don't have a spare 300-500W PC supply laying around? Seems like the 5V output could be modified to go to 6.3V. 15-20A is no load at all for those.