hello everybody
after putting in this amazing hazen grid mod ,i was reading in a diy audio forrum about replacing the cathode resistor by leds ,i couldnot resist trying it in my very heavely tweakt zen kit so i put 2 red 2volt leds in serie to each of the to cathodes of the 6n1p ev and got a beautiful stabil minus 3,72volts , the sound became more dynamic ,more smooth and vet ,i am loving it






marry xmass everybody

grtz zenlover  [smiley=simp38.gif]

hello dank
i think that the current[ampere] is to high for leds with the output tubes
the voltage would be ok with 6 leds , with the 6n1p it just about  5ma ,so there it works great ,it really a big improvement in the sonic  of my amp
  grtz ko  :)

wel after soldering and trying many different things to my zen kit ,i found it time for a complete rebuild ,and i wanted to build it like a tank
,all value,s are the same as on the schematics of the zen cs ,de oversized resistors are arecol ,i got all the parts from a army electronical surplus store ,the condentsators are rusian pio ,s 0,22 uf 1000volts ,these gave a real improvement in the sound ,the tubes are voskod 6n1p ev 1970 production as a driver and  6n15p ev [sv83]
as output tubes  a 1960,s svetlana 5u4[sint petersburg build ] as rectifier
the bigest improvement in comparesy with the original zen kit where the pio condensators ,the hazen grid modification , the led biasing
the rest will just last for a lifetime because of the oversizing
the power suply was changed because we use 230v here in the netherlands ,
   grtz ko

what the problem you need help with? i am located in amsterdam
grtz ko  :)

happy new year to everybody here  ;)