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Re: Incoming JCM 900 Mkiii

Posted: Tue Mar 24, 2020 4:11 pm
by griff
Hmmm maybe. I thought they were a drop in but could be wrong.

Re: Incoming JCM 900 Mkiii

Posted: Tue Mar 24, 2020 4:46 pm
by willow13
griff7628 wrote:Hmmm maybe. I thought they were a drop in but could be wrong.
I know zero about amps electronics but a quick google told me there is a small resistor mod that needs to be done ... could be totally wrong :rofl: :rofl:

Re: Incoming JCM 900 Mkiii

Posted: Tue Mar 24, 2020 5:33 pm
by higainer
willow13 wrote:
griff7628 wrote:Are KT77's worth considering for this amp?
I think you might need to swap out some resistors to be able to run them??
Nope, they’re like EL34’s but with more highs & lows.
Just bias the amp just like you would when installing new tubes :thumbup:

Re: Incoming JCM 900 Mkiii

Posted: Tue Mar 24, 2020 5:51 pm
by godgrinder
willow13 wrote:I know zero about amps electronics but a quick google told me there is a small resistor mod that needs to be done ... could be totally wrong :rofl: :rofl:
That's KT88.

Re: Incoming JCM 900 Mkiii

Posted: Tue Mar 24, 2020 6:05 pm
by higainer
godgrinder wrote:
willow13 wrote:I know zero about amps electronics but a quick google told me there is a small resistor mod that needs to be done ... could be totally wrong :rofl: :rofl:
That's KT88.
Yep

Re: Incoming JCM 900 Mkiii

Posted: Tue Mar 24, 2020 6:37 pm
by willow13
cool .. totally trust you train spotters :rofl: ..... I know sweat fuck all about this stuff :rofl: :rofl:

Re: Incoming JCM 900 Mkiii

Posted: Tue Mar 24, 2020 8:32 pm
by griff
That's why we have forums! :D