> 1. What do I put across the input (cap) (resistor) or (short) and what
value?

Short Circuit Noise is the relevant spec for this application. ie Short
the input.

> 2. Do I use a load resistor (what ohms)?

Doesn't matter. Use the input Z of your recorder if you're fussy.

> 3. On the 42 db setting (82 ohms) that is a low uv reading and a normal
reading I should expect using the Richard Lee circuit.

> MAX410 339nv of noise is this in the real world?

If you build it to Guru standards you should get within 1.5dB of this on
the 42dB gain setting.

339nV (-127dBu) is the Equivalent Input Noise ein which is referred to the
input. This is output noise divided by the gain.

Here, the output noise should be -127dBu + 42dB = -85dBu ie 43.6uV

The 339nV is over 20kHz bandwidth. If you are measuring at the output of
the amp, you need a very sharp 20kHz filter.

Or use A weighting which will gain you another 5dB or so.

If you feed this amp into a (decent) A/D sampling at 44.1kHz, the
anti-aliasing filters will do the sharp filter and you can analyse the
recorded noise.

However, (good) A/D dither introduces noise; which on 16b Digigram VX440 or
Maya 44, is -83dBu which is more noise than the amp.