[Collins] 30L-1 vs 30S-1

[Dr. Gerald N. Johnson]

On 12/10/2015 3:24 PM, Jim Isbell, W5JAI wrote:
> What can the 30S do that the 30L cant?
> ______________________________________________________________
>
At least 1500 watts from the S1 with a KW of plate dissipation with a 
tube designed in the 1950s where a linear is often barely 50% efficient 
vs a tough KW pep input from the L1 with only 500 watts of plate 
dissipation in tubes designed in about 1937. Basically a conservative 
design vs a ham style living on the edge design in the 30L1. I noticed 
in the catalogs from the 60 when power was limited to 1 KW input, that 
both had the same ratings but the S1 showed low intermod values and the 
L1 didn't mention them. To acheive that conservative design the S1 does 
take up a lot more space. And I think the S1 can run RTTY at full power 
which could fry the L1 quickly.

73, Jerry, K0CQ, Technical Adviser to the Collins Radio Association.