I have a Collins Radio 30L-1 Linear Amplifier.  I would like to use it with my 
Elecraft K2 as well as my K3. 

I have performed a “soft keying” mod which involves modified the keying line in 
the 30L-1 by using a relay from -170 V 70mA (which was the original 
specifications) to -15V 1mA. This makes this popular vintage Collins 30L-1 
linear amplifier usable with modern solid state radios without the possibility 
of damaging them.

I need to know if this amplifier, modified as described above, would be safe to 
use with my Elecraft K2 and/or K3.

73,

Michael, W1RC
Marblehead MA 01945
w...@near-fest.com



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