[1000mp] Inrad Front-end Mod

[tbeltran]

Thanks to all who responded.

George, I am feeding the 606A with 50 ohms to the input of the Mark V.  Is
there something more I should do?

And Ron, thanks for the math - that is way beyond me.

Let me add that I set my signal gen. to CW, and I tuned it to 14.1 (I used
20 meters only because that is the band where whether using the tuned or
flat RF preamp position, it is the same - flat.) I then tuned in the signal
like any CW signal, using the indicator on the Mark V.


>The service manual has you set the IF gain using only 1 block on the
>s-meter lit with a +11dbu source.

I wonder what this would be in microvolts - I'd like to check it out and see
if it verifies my current setting.  Harry's setting of 10 is more like it -
I think Inrad says to reduce the gain by 1 or 2 points.  Next week, I'm
going to take my rig to a friend's house - he has a calibrated signal
generator and other tools - and more importantly, he knows how to use them.

This whole thing is quite interesting to me - compared to my Drake R4C (with
Sherwood mods), my Mark V always seemed noisy to me.  Right now at 4, it
seems much improved, but, it may be too light as Harry found out.  Tom W6EIJ