RobbL wrote:
This is probably a very foolish question but I need an answer:

What is the difference between round emblem and wide emblem Collins gear?


The most significant difference is in the KWM-2 transceiver.
The round-emblem type, which appeared around 1969,
used two plug-in relays for T/R switching, whereas the earlier
winged-emblem KWM-2 used telephone style relays.
If a old-style relay fails, it can be a major
headache trying to wire in the replacement.

The very newest KWM-2 and KWM-2A's used teflon wiring instead of vinyl
insulation. The vinyl insulation is easy to scorch
if your soldering skills aren't first-rate.

73,
Ed Knobloch