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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...
Cheers
cv
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