What about output tubes...KT-88, KT-77, KT-120, KT-90, KT-99

I would be interested in your results with different Russian output tubes, sound , quality , price........All around ??

autospec03-10-2017 4:57am

georgehifi Details Discussions Posts This discussion 10,312 posts 03-17-2017 at 02:58am Copy Comment URL Report Comment Edit Delete Be careful of the heater currents the KT120, are up to 500mA each more than a KT88 times this by 8, and you can cook the heater supply, and it probably sagged below 6.3v because of it. My bridge rectifiers crack in two on my Rogue's when I owned them. Cheers George
chrissain Details Discussions Posts This discussion Message User 470 posts 03-17-2017 at 04:04pm Copy Comment URL Report Comment Edit Delete George, what rogues did you own? I own m180s and was told by Mark Obrian 120s would be no problem.
georgehifi Details Discussions Posts This discussion 10,312 posts 03-17-2017 at 07:41pm Copy Comment URL Report Comment Edit Delete From memory they were the 150 monoblocks. It took a couple of months before the bridge rectifiers went, then I put in some much lager 35amp ones and all was fine. Not fun though when they go. Cheers George
georgehifi Details Discussions Posts This discussion 10,312 posts 03-19-2017 at 08:46pm Copy Comment URL Report Comment Edit Delete PS: something that slipped my attention, is that you also need to look at the power transformer’s filament (heater) winding to see if it can handle the extra current as well and without sagging. Cheers George