[AMRadio] Grounded grid amp

[David Folger]

Another option would be 2 to 4 6DQ5's. The 6DQ5 is cheap and easy to come by. Higher plate dissipation than a 6AG7.

There are designs on the net. I would think you could get about 100W out on AM with four of them as they have about 25W dissipation each.

Other sweep tubes would work also, but most are more expensive.

Just don't get carried away and believe the specs from some of the '70s era sweep tube linears. They were overrated and burned tubes like crazy with crappy signals to boot.

--- On Wed, 1/26/11, Hiroki Kato <hirokik at aol.com> wrote:

From: Hiroki Kato <hirokik at aol.com>
Subject: [AMRadio] Grounded grid amp
To: "Discussion of AM Radio in the Amateur Service" <amradio at mailman.qth.net>
Date: Wednesday, January 26, 2011, 7:54 AM

Many years (decades) ago I saw a small amp using 5 x 6AG7 in parallel using grounded grid. Very simple and elegant design. Perhaps it was in QST but I may be mistaken. Anyone has any info? I would like to build a 50-100 watts amp to boost an ARC 5.

Hiroki AH6CY
> 
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