there is an EX8A schematic - pair of GU81M with double pi-networks -
one of them instead of plate choke.
that amp works up to 10m no problem and gives 3kW out.
http://www.cqham.ru/HiFi_Contester_EX8A.htm
On Sun, Jan 11, 2009 at 7:03 AM, DAVE WHITE <mausoptik@btinternet.com> wrote:
> Hi Tom - Somewhere I have a circuit from a Hungarian amateur that uses a
> single GU81M on 80-15m. I'll try to find it (a major operation in my
> library, and not one guaranteed of success!!) and scan it for you if you need
> it.
>
> cheers
>
> Dave G0OIL
>
> --- On Sun, 11/1/09, Thomas Hoeppe <thomas.hoeppe@asamnet.de> wrote:
> From: Thomas Hoeppe <thomas.hoeppe@asamnet.de>
> Subject: [Amps] GU81-M on highbands
> To: amps@contesting.com
> Date: Sunday, 11 January, 2009, 6:15 AM
>
> Has anybody used a single or a pair of GU81-M on highbands? Of course I see
> the
> problems with the high output capacitance, but there can be solutions like
> L-tuning or a small L before between tube an plate-capacitor.
>
> Has anybody done that in practice?
>
> Tom, DJ5RE
>
> www.hoeppe.name
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|