DYNACO Pre-Amp PAT-4...with an added Volume knob

Here is an UPDATE on Dynaco PAT-4 pre amp......
As you know from my previous post, I was asking about a volume control knob that someone installed in my pre-amp's input jack.
I now have found out  the knob was used to regulate the volume on Output 1 .
I hooked the unit to Output 1 . 
( there is an Output 1 and an Output 2 )
Output 1 regulates the volume.
Does anyone  know why this second volume control was added onto Input jack?
The music does sound better on Output 1.
Should I leave it hooked up that way ?
thank you

WOW that is a of of information. One heck of an upgrade too.

I have a PAT II all valve unit.. I bought the kits over 2 years ago.
(my interest in this thread)

Distortion reduced from .02 to .002 10X reduction.. lot of work!

Regards

Not heard of that. You might hook it up and see what happens- does it control the main outputs? Does it control the recording outputs? That will give you a good idea if you need to do anything about it.

So you have 2 volume pots, and NO headphone jack, or is there still a headphone jack there, inside or moved?

Second:  what is the volume pot hooked to? I'm thinking someone used it for a trim pot, on a line source input, like a Reel to Reel. Is it a pot or an analog, off/on switch of old.. 4-6" long with disk full of resistors/caps and a common shaft?

Does the unit work?

Regards