[Amps] Tube amps are not a thing of the past

[Gary Schafer]

Hi Jim,
I think that the 4CX1500 has the same grid as the 4CX1000.
Somewhere I have seen it written by Eimac that it is ok to draw a small
amount of grid current during brief tune up.

The Collins 30S-1 (4CX1000) develops ALC from grid current.

73
Gary  K4FMX

> -----Original Message-----
> From: Amps [mailto:amps-bounces at contesting.com] On Behalf Of MU 4CX250B
> Sent: Monday, June 05, 2017 11:03 AM
> To: Jim Thomson
> Cc: amps at contesting.com
> Subject: Re: [Amps] Tube amps are not a thing of the past
> 
> I've long wondered what the zero watt rating of the 4cx1000 grid
> actually means. I've assumed it means the tube is rated for class AB1
> operation only, and that the rating doesn't reflect the actual
> physical limitation of the grid structure.  I wonder if anybody has
> actually cut apart a tube and inspected the grid?
> 73,
> Jim w8zr
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