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Re: which LL1660 should I buy?

Tre,

I think that you might want to buy the LL1660S/10mA. You can use it as you state in your post employing connection alternative T. This will give you a bit more gain and still drive the 6B4Gs adequately. The LL1660S is a new version of the LL1660 that has shielded secondaries, providing better phase-splitting performance. Using the same connection there are a lot of other tubes that will work with up to 20mA of plate current, such as the 5842, and have lower Rp and more gain.

Kevin Carter
K&K Audio
www.kandkaudio.com

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