On my Pentode SE amps with the UL tap on the OPT I add a triode/pentode switch. Nothing too techo just switches from the UL tap to 100ohm resistor to the plate. SE Pentodes have a good balance of lower-mid weight and detail. Currently I'm using JJ Blue glass KT88's.
Yeah. I thought about the switch but just got too lazy and I like UL mode allitle bit better.
Originly where the triode/pentode switch is now was a volume control. But at 3/4 settinmg it buzzed. So it got the axe and the triode switch dropped straight in. They easy to retro-fit later. I run 0NF but another switch to drop in is one which may switch in a little local feed back. Easy and cheap to do.
That buzz you talking about I have experience the same, I found out that if you connect the safety ground I'n series with 100-200 ohms and cap I'n parrelle with the resister to chassis ground the buzz was gone, I don't know if you've try that or not but it work for me
I have used that techique in the past but in this case I ripped the ofending part and put something usefull in the hole.
Strange we were talking about my SE KT88 Pentode/Triode amp but I took it to a friend's house and came home with a cheque. With the amp in triode mode the purchase's veteran Tannoy 10" speakers really lifted. We tried the amp ( with JJ Blue Glass KT88s) in pentode mode-no go. I then inserted my Siemens NOS EL34 (expensive) tubes in both Pentode and Triode-awful.
So the day was won with KT88s in triode mode.
So the day was won with KT88s in triode mode.
KT88SE
Hello
I would like to ask some question from tube expert guys..
Do the half tube can drive the KT88??
Please take a look at the schematic.
Greetings Gabor
Hello
I would like to ask some question from tube expert guys..
Do the half tube can drive the KT88??
Please take a look at the schematic.
Greetings Gabor
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Rather than asking in the Picture Gallery thread, I suspect you'll get more answers if you start a new thread.
~Tom
For a "simple " answer I do not want to start a new tread!
I see people here talk about many another think , not just ready made projects or pictures.
Sorry if it look like I want to hijack the tread!
Please accept my humble apology.
Greetings gabor
I see people here talk about many another think , not just ready made projects or pictures.
Sorry if it look like I want to hijack the tread!
Please accept my humble apology.
Greetings gabor
Yes it can, some would say not ideally. To know different and varied opinions: start a new thread.
Some how I missed this. Very, very nice. Top layout. Very cool. I like big time. Don't stop.
Well yeah, a bit late, but its ok 🙂 Thanks. A new one is on its way, but not tube this time...
Wood looks great. I'm thinking it would be fun trying to land a toy chopper on it. I'd also like to see a woman putting those tube dampers. Sexy. 
Forgot to ask, do you hear any difference with the dampers on/off? Also, do they last a long time? Made out of rubber I think they may lose position and with time go down - due to heat.
The helicopter landing zone is taken by a flower pot 🙂
I wanted to try the ordinary O-rings. It works on the smallest lamp, because it heats up less than the bigger ones. On a bigger ones they just begin to melt. So i removed them. There is a possibility to order O-rings made of silicon or so, but the quantities at the factories are high. So no sound difference with those in a photos. I just don't have newer photos without it.
Oh my gosh, i am sorry for the picture that comes to your mind when you look at the photos i uploaded 😀
I wanted to try the ordinary O-rings. It works on the smallest lamp, because it heats up less than the bigger ones. On a bigger ones they just begin to melt. So i removed them. There is a possibility to order O-rings made of silicon or so, but the quantities at the factories are high. So no sound difference with those in a photos. I just don't have newer photos without it.
Thanks for the reply. Good to know you have a sense of humor. Oh, and great work! I can't (I have tried) make the wood look that good.
still under construction... but its almost done 🙂
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
