[Amps] ETO/Alpha 76 Tri-tube

[Jim Brown]

On 4/16/2023 4:04 AM, Rob Atkinson 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.

The tricky part of this is finding quality RCA jacks and plugs in 2023. 
The last quality RCA plug I know about was made by Switchcraft. I still 
have some in my stash. I don't know if there is a quality chassis-mount 
jack available. Remember that to provide shielding, the cable shield 
MUST be bonded to the shielding enclosure at the point of entry. As 
printed circuit construction took over several decades ago, 
chassis-mounted jacks have become hard to find.  And, of course, 
transmission line must be used to carry the drive to the input stage; it 
doesn't have to be coax -- Elecraft used twisted pair in at least one of 
their products.

73, Jim K9YC