A simple question (as if there really are any) about the Keying circuit of an L4B. Because I use several radios to drive the L4B I have a relay connected to the amplifier keying circuit that really only grounds the leads, that has now failed to work. I looked at the schematic and it appears there could be voltage on the VOX pins and it's actually referenced in the manual that if you have the pins reversed the plate current will go up and to reverse the pins. There is no voltage present!
* Saying all that, what voltage should I see if any on the keying circuit when not keyed? * Has anyone experienced this before and if so what did you find? Yes, before anyone says it, I know ultimately I have pull the unit out of line and take it apart to trouble shoot but I also know symptoms can provide a path to repair and a place to start. Thank you (in advance), John N. Hudson III, WA6HYQ "C" line, TR4C, RV4C, L4B, MN-2000, TR-6 Owner-Operator.
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