You will need an external relay, such as the AmpKeyer or you can place an internal HEXFET switch inside the 30L-1 to reduce the voltage and current for modern solid-state tranceivers. If you take the internal approach - you might as well check the HV capacitors and diode string. K1ROD and WN4I makes nice replacement board for the old top hat diodes (that do fail over time).
Harbach Electronics (Jeff is moving business to Michigan)http://www.harbachelectronics.com/main.html
Amp Keyer (HeathKit Shop)http://www.theheathkitshop.com/ampkeyer.html
Rod Murray, K1ROD
17418 E. San Marcus Drive
Fountain Hills, AZ 85268
( 480) 836-1246
High quality replacement diode boards for the Collins 30L-1 amplifier's power supply. The boards are copies of the original. I am offering complete, populated versions for $79.00 + shipping. A photo can be seen at: http://members.aol.com/dw130/diode1.jpg
Yves Pautard, WN4I
5833 Dryden Road
West Palm Beach, FL 33415
Updated power supply board for 30L-1 amplifier. Includes new high-power diodes and computer grade HV capacitors on new circuit board. Installs with seven wires and and a few screws.
Good site for Collins parts and updates:http://www.collinsradio.org/html/parts_s-line.html