Well......it's not the jack. Basically if I eliminate the Purple wire (CA) which I confirmed touches the Tip of the cord when cord is inserted and touches nothing when not,....the amp will work fine on a simpler two wire jack AND the original jack less the (CA) circuit. So the problem lies within that (CA) circuit? Correct? I tried to physically follow that circuit but got lost in the process to many times. (Seeing cross eyed now) :loco What next?... to keep the full features of the input jacks.

Thank you all very, very, much! At least I know the problem was at the input jacks PCB.

One last question,... do you know what the (CA) Purple wire on the input PCB which goes to the main PCB is for? Basically 3 wires. Red(I) Black(G) and Purple(CA)

Hurray!!! I removed the channel 1 input jack from the input PCB. Installed a two wire input jack on the input PCB to the Tip/Red (I) and Sleeve/Black (G). All voltage is gone at instrument cord and PROBLEM SOLVED!!! So.....what did I just eliminate? I can't for the life of me see anything wrong with the 5 point input jack that I just removed. Here is the Amplifiers input jack features posted in the users manual:

INPUTS — Input 1: 0 dB. - Most sensitive input.   Input 2: -8 dB. - Less sensitive input for Steel guitars and ex- tra-high output pickups. NOTE: Inputs have true active summing, therefore two guitars of any impedance may be summed together by using both inputs. It is also possible to use a "Y" cord to give even more gain. (Single guitar Y-ed into the two inputs).

Anybody? Will this setup that I just did work from here on out? Safely? Effectively? What features did I just lose? (if any).

I have other input jacks I can try out on the input board by just soldering the replacement jack to the input board in a way that it bypasses original jack and still uses the resistors ( which I have checked out and are fine ) but like Fahey says the schematic seems to be wrong? Here's what I have, 3 wires,... Red (I) Black (G) Purple (CA). 1st what does Purple (CA) represent?

To: J M Fahey....wow I think you are nailing this. Funny you said this,...

"I guess either the jack is damaged, has bent leads, whatever, or re-soldering shorted nearby contacts or leaf switches are worn or bent or PCB is contaminated , and now those 13.7V cxan contact the *audio* pins. They travel backwards to your guitar and make a scratchy mess."

Because when I cleaned the amp pots with Deoxit Gold G5, I sprayed all pots on the PCB in their place. I had quite a mess and continued to spray other components like input jacks and tube sockets. Even tried to tighten up the tension on the two input jacks so the cord would fit more snug. Then I proceeded to blow all the excess spray off with an air compressor. Reassembled the amp and that's when the problem started. So...then I thought the spray might be contaminating the PCB. So I sprayed a product 70% Isopropyl Rubbing Alcohol mostly on the underside of the board and lightly brushed with a tooth brush. Also sprayed it on the pots and input jacks. I wasn't to sure about spraying the alcohol on the component side of the PCB so I didn't. Then lightly blew off and dried the whole thing with air compressor. Could I have damaged something? Or do I just clean it better?

Wow! Thanks a million for the schematic!!!

Oh boy would I like a schematic too!!! Can't locate anything on the circuit.

I know!!! I saw the volt reading and said WTF??? That's why I included a pic of my volt meter so there's no confusion on what setting I'm using. Gotta go to work for the day now....I REALLY APPRECIATE you guys helping me out. Keep throwing the ideas out there. I'll check back later today......

Correct. Straight into the amp. On my multimeter ( which I've included a pic of ) I have a reading of 13.70 DCV at startup and slowly climbs to 13.99 DCV in approx 5mins.

Just gonna through this out there.......
I've got an annoying problem while turning/adjusting the volume on ANY instrument!... or volume pedal... or acoustic pickup with a volume....etc,. Looks like a classic sign of a dirty/worn volume pot on the instrument etc,.OR a bad cord...but not so. It all started when I successfully cleaned the Master Volume pot and all others on my 1991 Tube Works RT-2100 MosValve+Real Tube OverDrive 100 watt Combo Amp. Concept and Design by B.K. Butler. I used a can of Deoxit Gold G5 spray. It worked GREAT! Noisy Crack POT SOLVED!! But not so fast grasshopper...Now it's developed this annoying glitch while adjusting ANY volume going in to the input ...either channel. I  have switched the Master Volume pot out of the amp...no diff. Cleaned guitar pots...changed cords...different power outlets...tried ANYTHING with a volume...to no avail. Still got the problem. What could be taking the input signal and making noise ONLY when it is being adjusted with a volume pot? Any suggestion? I have soldering skills and can work a multimeter. By the way...the amp works perfectly normal on both channels. All amp pots are clean and no noise.
Signed, Baffled