RE: [drakelist] L4B and L7

I believe the voltage is around 36 V.   Do not try and key the amplifier directly with the pro 2. The output contacts in the Pro2 do not have sufficient rating for the amplifier. Use a small relay between the Icom and the amplifier. I believe that you can buy an interface, but you just need

[drakelist] R4C/TX4C Sidetone Problem

While sending cw a steady, but weaker tone, is heard in the background.  It continues until the relay switches back to receive.  Any suggestions as to what part or parts have deteriorated?  Thanks Paul K7CKZ

[drakelist] L4B and L7

Please can anyone tell me the voltage and current on the vox key line of both the L4B and L7.  Drake service cannot. I want to make sure I do not damage an Icom 756 Pro 2. I really appreciate any info