[Amps] ETO/Alpha 76 Tri-tube

[john at kk9a.com]

Using an RCA connector on the RF input as a fool proof measure is
ineffective since ALC and relay inputs on the Alpha 76 also have RCA
connectors. A BNC on the input solves this issue and it should be an easy
swap.

John KK9A



Rob K5UJ wrote:

There's nothing wrong with a RCA jack for the input RF to a power
amplifier, except that you have to put a RCA plug on the end of a
feedline, which is about the easiest coaxial plug to install there is.
It wasn't done to save money; it was done to ensure that the user
connect the exciter to the amplifier input and the antenna to the
amplifier output and not swap the two mistakenly, something I once did
several years ago with identical rear panel jacks.  Collins used BNC
jacks for input for this reason; I'd prefer the ease of RCAs but the
catch is that you have to use a decent plug that is correctly sized to
make good contact.

73
Rob
K5UJ