On Tue, 5 Aug 2008, Tio Pedro wrote:

Transmitters don't worry about noise figure or dynamic range...
I'm more worried about how the different gated beam tubes will
work in receiver applications.

I caught that point in your original post.

There were plenty of articles about using the other but cheaper
tubes similar to the 7360. But I'm not certain any I saw used
them as a first mixer. One could go back and check. And if
that's the case, either everyone just copied Squires 1963 article,
or there actually was a good reason to not use the cheaper variants
for the first mixer.

MIchael VE2BVW