Re: [Elecraft] [ELECRAFT LIST] Using Vintage Collins 30L-1 Linear Amplifier with K2 and/or K3.

Michael, The low power K2 does not have an amplifier keying output. It is easy to create one, using the 8R line to operate a transistor switch. Such a circuit is shown here and there are others. However, most are

[Elecraft] [ELECRAFT LIST] Using Vintage Collins 30L-1 Linear Amplifier with K2 and/or K3.

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