Hey guys, new to the forum, but I could really use some help. I got my Tremoverb about a year ago, and besides some small issues when I got it, it's been a great amp. Anyhow, I recently retubed it with Svetlana 6L6s and Tung Sol 12ax7s. Sounded great at first, but then one of the tung sols went, popped a spare in and all is well.. except today I turned it on and was rocking out like usual, and then I try to switch on the tremolo, and absolutely nothing changes.. no tremolo at all.. but the weird thing is that the LED on my footswitch still pulses in time with the tremolo.. but no change on the sound.. any help/opinions would be awesome, thanks in advance!