[ARC5] Collins stuff and RCA jacks

[Kenneth G. Gordon]

On 14 May 2013 at 10:48, Todd, KA1KAQ wrote:

> On Mon, May 13, 2013 at 4:02 PM, someone wrote:
> 
> > Collins was even able to "coax" people into paying the
> > very top dollar for radios using RCA phono plugs for
> > RF coax connections (like the entire S-Line).

It has been proven repeatedly that the RCA jack has a lower (like none) 
impedance "lump" than an SO-239, is easier to use (no cross-threading 
problem, doesn't vibrate loose), and is fully as capable at the 100 watt level. 
Furthermore, those insulated with ceramic are even better.

Using those was another example of Collins' wisdom, not "cheapness".

Heathkit also used those, although they eventually switched to 
plastic-insulated ones. And other companies did the same.

The main reason so many hams changed the RCA jacks to SO-239s is that 
every other piece of equipment they owned already had those, and swapping 
back and forth between the two types became a problem for them, or they 
were using RG-8 and needed the larger connector. I haven't found any of 
that to be a problem since I have adapters if I need them.

There is absolutely nothing wrong with the RCA jack in RF service at the 100 
watt level with small coax, especially when good quality ones are used.

Ken W7EKB