[Amps] Grid Vs cathode drive

[Joe Subich, W4TV]

Peter writes: 

> The downside is that you need tuned circuits in the cathode 
> for decent linearity - I was always surprised at the 30L1 not 
> having those.

I made that mistake a week or so ago and was corrected ... the 
30L1 does have tuned input.  See the schematic/manual available 
from: http://www.collinsradio.org/html/30l-1.html 

The tuned input is visible in the picture about half-way down 
the page. 

73, 

   ... Joe, W4TV