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In the Forum: Audio Discussions
In the Thread: NAT Audio Magna -160 Watts of Single-Ended Class A
Post Subject: Pretty much right about them output transformersPosted by cv on: 11/13/2007

Completely agree... but there is one possibility to get the inductance up without increasing the turns; use a smaller airgap in the OPT.
This will tend to saturate the thing sooner for a given current. BUT there is a trick that has been successfully employed to get around this, which involves using the filament current to offset the dc flux in the core - a few turns running 10-20A of dc should do it here.

But I don't think they are doing this here. What I would bet is that that they are running the thing in A2 with a much lower Z primary, using a lower B+ and high standing current. They are also using feedback which will help the bandwidth.

Btw, what do you mean by "dehydrated" highs?! I've heard you use that one before...


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