- Mar 22, 2022
I'm a learner so I'm likely wrong, but the jack to the left if grounded to the chassis, wouldn't the switch be grounding your output from the speaker jack?
Not in this case. He doesn't have a the switch on the second jack connected to ground.I'm a learner so I'm likely wrong, but the jack to the left if grounded to the chassis, wouldn't the switch be grounding your output from the speaker jack?
If amp has a tube rectifier or HV/stby switch control positive HV DC it take about ten minutes to test OT, speaker jack and loudspeaker!Or just some sort of test to confirm whether or not the output transformer is working correctly?
It's correct as per the wiring diagram but thanks all the same for the suggestionI'm a learner so I'm likely wrong, but the jack to the left if grounded to the chassis, wouldn't the switch be grounding your output from the speaker jack?
Are you sure your output jack is securely grounded? There are two ways to do this: 1) traditional, that is the jack is just grounded to the chassis mechanically (sleeve, bushing & washer/nut contact the hole through the chassis), or 2) Blencowe-style purist: isolate the jack(s) from chassis locally using plastic and/or phenolic washers, and run a ground wire from jacks to the ground bus.
No, not at all; just thought I'd mention the other approach in the time-honored tradition of TMI. It is possible, however, that a loose mechanical connection to chassis is in play, no?I may have missed something. Is there anything that makes you think the (extremely common) first method isn’t in play there, or might not be secure?
Haha, well observed @chas.wahl I only noticed that myself when I saw the photo, my phone records more detail than my eyes. I subsequently removed the hair with a pair of tweezers and a magnifying glass though that didn't fix the problem at that point. Now you mention it, does a human hair conduct electricity?Uh, I was just looking at @Duelling Banjo's photo of his jack situation, and noticed that there's a hair that seems to bridge between sleeve and the tip lug (on the right side of the main speaker jack). Could that have been the problem?
Not lethally because there are alive rock musicians but no doubt it must have some effect to brain functionNow you mention it, does a human hair conduct electricity?
So must have been a dodgy connection between the jack plug and socket or something along those lines.
The plug in the photo appears to be Neutrik, plastic bodied. About which, I know nothing, having none of those.
Why not? It seems to fit well and Blues Junior is with 12" already - it makes a nice combo with mainly less of width.Here's my chassis mounted in my re-purposed and previously non-functioning Blues Junior combo. I hope I haven't committed sacrilege, but my motive was that I didn't want to chuck the BJ and I really fancied a tweed deluxe at a bargain price. Still haven't had time to give it a thorough workout so I'm taking on board the much appreciated comments above and will get into them more deeply if there are any problems going forward.