Volume cutting out then back to normal after 1/2 second
Good morning all from a rainy UK morning.
Back in Oct 2017 I posted about a problem I had with the volume going to zero then back up to normal after 1/2 second as if some one was turning the volume control up and down. I was given a couple of possible issues to pursue, all of which I looked at. One issue was the possibility of a faulty cable between the power stand and the B2. I purchased a new cable from our local dealer. Well the equipment has not shown this fault again until this week "Jan 2020" when we practised a set for our next gig in our conservatory, so levels where not as high as a gig on stage. After about 30 mins playing, backing tracks, guitar and 2 vocal mics the level went from high to nothing about 4 or 5 times in less than 10 seconds. I did notice that the Tone match was still showing levels for all inputs when level dropped to zero. On the gig on Wednesday at a retirement home we played for the residents for 45 mins with no problem then out of the blue we started this level change from full to nothing quite regularly over the last 3 or 4 tunes we played. Now in our conservatory the only thing I did different was to change the switch on the B2 from normal to minus to see the difference. Then the problem started. I changed it back to normal straight after. Now the venue it is a large old house with plenty of building extensions they have there own laundry with industrial washing machines and where we were playing was a long way from where I suspect the incoming mains feed is so thinking about the last reply on this subject I am wondering if it could have been the mains power at our socket that could have dropped below the threshold.
But just to conclude having set up back at home I played a Rock and Roll CD at a higher level than performance on repeat and let it play through 4 times and the L1 model II with B2 never faulted. I did set back up using a heftier mains lead and a heftier mains extension block. I will look further at the cable from stand to B2 but moving it around while cd playing did not induce fault. Could this issue be the switch on the back of the B2? as it has not been moved for 2 years.
Any comments very much appreciated.