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Did just that and I checked the continuity right at the switch bodies and at the end of the stereo plug with the stereo cable plugged into the switch jack, Both ways make and break continuity. One switch is tied to tip and the other to sleeve into a stereo jack receptacle. The third switch in...

Looks like you were right Plan-x. I did the paperclip test and I can hear both relays with the channel one being louder. The switch I'm trying to use is like this...

I moved the mono cable and footswitch to the front panel and tried to activate the channel change ... but no go. This sort of mmics what you said to do with the paperclip. When I plug in the footswitch (which BTW worked on the rear panel to change channels) the green light goes out and channel...

Well, I tried activating the "solo" from the rear panel with a mono jack. I checked my settings against your suggestions and everything is set. I can't hear any discernible sound increase. I even pegged the solo level knob with the master at 12 ... and nothing. When I switched jacks to the...

Hey thanks plan-x appreciate you confirming measurements. I just took these. I took the stereo plug out of the front and then plugged a mono plug into the rear jacks. Chan = 1.42 - 1.43 V Solo = 12.04 V Could that be the problem? I thought the rear jacks are separate from the front F/S...

Thanks for the help plan-x. Appears like its what I expected. Tip & sleeve are (+) or "functions" while the long barrel of the plug is (-) or ground. I assume the topside of the board is just the switches, jack, and LEDs soldered to the board. I measured the voltages by inserting a stereo...

I still don't understand this footswitch connection and can't get it to work. When I review the schematics for the footswitch at schematic heaven it shows MESA drawings which show a standard 1/4 stereo plug wiring with the long part of the plug being ground. Yet in the Lonestar manual they...

Thanks for the reply Steve. I'm new to this so I'll ask a dumb question. Since these have no bias adjustment, when you order power tubes do you also have to ask for a certain spec? Mesa claims that you don't have to bias adjust because all their tube are to a tight specification.

How did those JJs sound? Any improvement to the stock tubes?

Thanks for your responses guys. I did have the loop in activated with the pot at 12 o'clock per the manual. Under these conditions I'm not hearing any volume boost. I was trying it from the rear jack because the manual said it should also work from there with a standard mono plug. Just trying...

I just recently purchased a used LSS. I've read through the online manual and scoped out this board, but can't seem to figure this out. It did not come with a foot switch so I used a standard 1 button latched type foot switch from another amp. I connected it to the rear channel plug and I can...