[Elecraft] K3 on AM with AL811H amplifier

[Chuck - AE4CW]

Joe,

You are quite correct about limiting AM carrier power on the K3 to 25 watts
and AL-80B carrier power to 200 watts.  However, according to Ameritron and
Tom, W8JI (designer of the AL-80B), 1000 watts PEP on SSB is the upper limit
as is 800 watts on CW.  The key to minimizing non-linearity is to tune with
drive set to produce the maximum PEP that will be produced by the
transmitted envelope and then slightly "over-tune" (less capacitance) the
load control.

Chuck, AE4CW



> Don´t know how much the AL80B can handle
> but 1600W PEP sounds to be too much.

The AL-80B is a single 3-500Z.  It is capable of 800W peak if 
it is to remain clean and should not be run at more than 500 W 
CW.  40W carrier from the K3 and 400W carrier from the AL-80B 
are, in both cases, grossly out of spec. 

The K3 should not be run at more than 25W of carrier (28W absolute 
max) and the AL-80B (or any single 3-500Z) should not be pushed to 
more than 200W carrier (absolute maximum).  

73, 

   ... Joe, W4TV 
  

-- 
View this message in context: http://n2.nabble.com/K3-on-AM-with-AL811H-amplifier-tp4605487p4609071.html
Sent from the [K3] mailing list archive at Nabble.com.