[Collins] 30S-1 final

[George Morton]

The 4cx1500 is direct replacement for the 1000.  The big deal is grid 
handles one watt vs 0 watts for the 1000.
use a 1500 and change the screen voltage with the well known mod and the 
30S1 will really get up and bark!

----- Original Message ----- 
From: "pete wokoun, sr." <pwokoun at hotmail.com>
To: <collins at mailman.qth.net>
Sent: Monday, September 10, 2007 11:15 PM
Subject: [Collins] 30S-1 final


> The 30S-1 I'm working on has a 4CX1000A final.  The tech manual also lists 
> this as the final.  I've heard and read about some amps having a 4CX1500B 
> in there.
>
> Is this a later model change?  I see the tubes specs are almost identical 
> except for the plate disipation and filament current.  Can  they be 
> interchanged in the 30S-1 or do you HAVE to use what's stenciled on the 
> bottom side of the top cover, ie the 4cx1000A?
>
> pete KH6GRT
>
>
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