More bifilar fun.

that colorado rocky mountain high.
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dave slagle
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More bifilar fun.

Post by dave slagle »

The goal was to see how a nickel plate choke that could be wired as a transformer would fare against a 250 hy choke in a phono stage. The tube was a 5687 and the nickel choke had approx 120hy's of L as sent and the guys opened the gap up by ear and ended up with around 25hy. the following stage is an AVC with ~125hy's of inductance so we have all of the makings of CL coupling (parafeed)

below are the simmed results showing the freuency response of the various hookups. I could easily see the hump being an octave off in either direction.

this is essentially an extension of this topic.

dave
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dave slagle
Posts: 2099
Joined: Sat Jan 22, 2005 3:54 am
Location: NYC
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Post by dave slagle »

a few of the more important bits plotted on the same graph and a bit of fun with the 5687 cathode bypass cap.

dave
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