In about 1965 I ran a pair of 4CX250R's at 3200 VDC and proved to a friend
of mine that they would put out 750 to 800 watts on 6 meters. They got hot
on long transmissions ..,in fact, the plate leads unsoldered and I had to
clamp them. This was the time you could buy these rugged ceramics for 1.00
each in the L.A., CA military surplus market. Didn't care if they croaked,
as they were cheap.
Regards,
George W7LFD...ex W6BFJ
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com]On
Behalf Of Chris Pedder
Sent: Tuesday, October 12, 2004 1:14 PM
To: amps@contesting.com
Subject: Re: [Amps] Looking for a design for a single 4cx250b tube on50
Mhz-six meters.
At 18:51 12/10/2004, you wrote:
> The manual claims that a single 4CX250B will produce 600 watts peak
> output. It has unregulated bias supplies as well.
>I wonder if that is figuring peak voltage squared divided by resistance
>rather than PEP value.
>
>73
>Bill wa4lav
I use, though not very often these days, a pair of 4CX250Bs in AB1 passive
grid. On 80-10m they are good for about 550 watts pep out with reasonable
linearity. 35 years ago there were cheap pulls available here, which made
them an attractive proposition, especially with out power limit.
Chris
_______________________________________________
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
|