Intact Audio

Hello Again, The chokes Dave gave me came with an amber mylar spacer that gives an inductance of about 200H and they sounded very good. Vastly better than the original in fact. After playing around with the shims, I liked the red spacer, which lowered the inductance to about 150H better, and the gre...

Hi Everybody. Apologize for the long delay. When I got the new chokes and the original back from Dave, and swapped them into the amp, I suddenly had motorboating. For some reason it didn't occur with the inappropriate (parafeed) choke that I had substituted temporarily while I waited for Dave’s chok...

Hi Dave, The substitute (parafeed) choke measures 394 ohms on one side and 406 on the other. I can't resist commenting that the Brook choke is putting out more total energy above the audible range, even though its frequency response is awfully ragged up there. I bet you that this energy contributes ...

Wow! I guess you posted this while I was still typing my last message. Thank you Dave for all the work involved in this characterization. And yes, the tap with two twisted wires spliced to one is the center tap connection (to B+). The amp was factory wired, but my step dad, who inherited it from his...

Thanks Lars, Of course! I forgot all about the fact that the part I swapped in is an autoformer meant to be used in a parafeed configuration. I'm such a numbnut. So I have to acknowledge that my observations have no bearing on the contribution of the original Brook choke to the amps great sound. But...

Hi, My first post. I am the guy who wants these chokes (for Brook amp clones). In order to play music while I am waiting for Dave's chokes, I pressed into service a split choke from another maker who sells it as an autoformer phase splitter. This has a much lower DC resistance than the Brook origina...