[Amps] 3CX3000A7 on 144 MHz

[Conrad PA5Y]

There are several 3CX3000A7s in use on 144 MHz in EU and they are all different. They range from 1/2wl striplines or 1/2wl tube over the anode like the RX1AS GS35B design to a clone of the W6PO but with a PTFE sandwich on top of the anode line instead of CRL blocking caps. The most compact that I have seen uses a variant of the G8RWB YC156 2m anode line design with a PTFE sandwich. The input is pretty much the same as the W6PO 8877 design on all of them.

BTW the YC156 goes well on 2m. Depending on heater transformer availability I may use a YC156. Still undecided. 

When I have time I will get permission from the owners of the amplifiers and maybe put a page up

Regards

Conrad PA5Y

-----Original Message-----
From: Amps <amps-bounces at contesting.com> On Behalf Of donroden at hiwaay.net
Sent: 07 February 2020 17:46
To: amps at contesting.com
Subject: Re: [Amps] 3CX3000A7 on 144 MHz

I'd like to see a picture of the Plate Circuit on 2 Meters with a 3CX3000.

Don R  W4DNR
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