Rockerverb 50 mkii whistle/squeal at high gain
Posted: Mon Jan 28, 2019 10:25 pm
Hi there, first time posting and looking for some advice from the Orange community!
I've recently purchased a Rockerverb 50 mkii head second hand. I was trying out a range of settings/tones/volumes and I noticed a very pronounced whistling/squealing sound (like a teakettle) when the gain is set at around 3 o'clock or higher (if I back the gain off to 2 o'clock it disappears). This only happens on the dirty channel. The sounds seems to disappear when the volume is all the way down, but increases in volume with the volume control. It seems to fade or disappear when I'm playing, but returns with a vengeance when I turn the volume off on my guitar. I disconnected the guitar and the whistling is still present. The background hiss on the high gain setting also seems a bit loud (also increasing in loudness when the volume it turned up, again just on the high gain setting).
I did some research online and my guess is that this is a faulty or microphonic preamp tube. I found this thread which seems similar: viewtopic.php?t=27016
I haven't got any spare tubes, but will look to pick some up to troubleshoot, but I'm worried it could be something more serious or costly to fix. I would love to hear from anyone who may have experienced this or has any advice about what this might be and how to remedy it. Any help is much appreciated.
Thanks!
I've recently purchased a Rockerverb 50 mkii head second hand. I was trying out a range of settings/tones/volumes and I noticed a very pronounced whistling/squealing sound (like a teakettle) when the gain is set at around 3 o'clock or higher (if I back the gain off to 2 o'clock it disappears). This only happens on the dirty channel. The sounds seems to disappear when the volume is all the way down, but increases in volume with the volume control. It seems to fade or disappear when I'm playing, but returns with a vengeance when I turn the volume off on my guitar. I disconnected the guitar and the whistling is still present. The background hiss on the high gain setting also seems a bit loud (also increasing in loudness when the volume it turned up, again just on the high gain setting).
I did some research online and my guess is that this is a faulty or microphonic preamp tube. I found this thread which seems similar: viewtopic.php?t=27016
I haven't got any spare tubes, but will look to pick some up to troubleshoot, but I'm worried it could be something more serious or costly to fix. I would love to hear from anyone who may have experienced this or has any advice about what this might be and how to remedy it. Any help is much appreciated.
Thanks!