Jump to content


Returning Member
  • Posts

  • Joined

  • Last visited

Everything posted by tomislavkufrin

  1. one of my favorite local bands singing about the nuclear knife.
  2. I saw three different gerber files. 1 with trough-hole, 2 with smd components. The one i was looking at was "diffinput6a" - with smd components. I saw your project also, with trough-hole components, so that is also an option.
  3. For a simple balanced volume control, is attenuator + 4 diamond buffers OK, or i misunderstood something? I saw that people were making preamps with input selection and ubal/bal boards, but i suppose if i only need balanced, ubal/bal board is optional?
  4. While i had 727II with SR-009, SS Dynalo with HD800 was getting most of the playing time. After getting the the RME and its parametric EQ, the SR-009 almost got sold as i did not really see the point of owning it. If i did not find the SRX+ and decided to build one for myself, they would probably be gone already. Bought 95x locally and for cheap, decided to use it for backup and testing. HD800 took a step back to the SR-009. After that i got an itch and decided to build the Carbon. Now i generally use the 95x. Carbon removed a good part of that gap and they are a lesser pain in the ass somehow. I think i need the 007s..
  5. I hope that concerts will become a thing again, i would like to see them perform live.
  6. snakefinger still remains as one of my favorite musical discoveries.
  7. you can find some more info in this thread: about trafo specs:
  8. Question about MATE_N_LOK connectors from the Main PSU board BOM. Pitch = 4.14 mm? This one as a 2 pin example https://www.te.com/usa-en/product-1-770872-0.html
  9. Hm, it looks there was something else also causing the noise issues. Trafo itself was buzzing. I have removed the cover, now there is no noise on the trafo and seems that i cannot hear any noise on the headphones.. I will try again in the morning when there is no noise in the house but i think now it is silent. As i saw some scratch marks on the inside of the cover, it looks like the bolt was touching the cover and possibly making a shorted turn. Or i moved some wires and now it is magically better. Or both.
  10. My father told me that he cannot hear anything, but i can hear a very faint hum. There is room for improvement in my heater wiring. And i need to check if my soldering of socket pins is good. Better to ignore that question, i got confused about nothing..
  11. New tubes are in, 25V difference between + and - is gone. Works like a charm. Just for info, are there any other tube options that are not Tung Sol GTB, and not NOS?
  12. My mind tells me carbon, but my heart tells me grounded grid/blue hawaii. In the end i was thinking to make universal psu for carbon/grounded grid combination so i can have both. I think summed, this is again closer to the T2 budget. Then someone writes that blue hawaii is somewhere in between. Is this more like different shades of grey, or T2 is really that much better?
  13. I did not have problems balancing the driver tube plate voltages. Resistances are in 2500 +-200 ohm range. So, not to far off center. Looks like only that output tube is not matched well. Excellent, because i really like the sound
  14. Warm, i measured 8 hours after start. Value looks stable, i did not notice it change too much. I just do not like the numbers. I did exactly that. Same offset value, it just moved to the other channel. Next time i'll just buy everything matched.
  15. right now R+ to R- is <1V and R+ or R- to GND is <1V. And tends to stay like this. When i measure during the day R+ or R- to GND is around 0 +-3V. L+ to L- is 25, 22V, which i try to split in reference GND. Lets say L+ to GND ~= 11V and L- to GND ~= -11V. That is like a best case.
  16. What is the maximum voltage difference you can have between output + and - of a channel? 22-25 volts is still ok, or on the high side? Whatever i do with the pots it looks like this voltage difference is just shifting, not even changing. minimum i can get is 21V. I do not have this problem on the other channel. When i tried to swap them, i could again zero the offset and +/- on the "good" tube in opposite place. There are no sound issues but i would not like to damage the headphones.
  17. i would like to get in the group buy. for me please: 4x GRHVxxx 2x GRLV79xx 2x GRLV78xx 2x Main Board 2x miniT2 - bare boards.
  18. the chimp is re-listening his music catalog. this forum is a bit like AA meetings. except, instead to stop, people pull you in to do more alcohol.
  19. not the prettiest build, but i'm learning. goal was to make it work, and worry about the looks later. metal works was something new for me, you need to have good tools. these are my first two amps i have ever built. lower one is SS dynalo. edit: looks like i can upload maximum one picture(500 kb).
  • Create New...