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mdr30

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About mdr30

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  1. Thanks, two jumpers did the trick. I think I'll lower the gain with 50K/5pF feedback, which I think are the parts at the arrow (don't have a schematic). The PSU is hopefully ok too, did not populate the transistors that popped at turn-on. Time to test the beast.
  2. Am about to test my Dynahi boards but have a little probelm. The holes were to small for the 0,1 uF servo caps so I made them slightly larger wit a drill. Later I realised I may have ruined and inner layer contact (one leg of the caps have no connection on the back of the board). Is there a way to check this, could a jumper fix it?
  3. Had a Keith Monks unipivot quicksilver tone arm 30 years ago, very interesting design. Problem was that the pins oxidised in the quicksilver bath, had to be cleaned regularly. But the design without cables from tone arm to turntable and at the same time damping of the unipivot arm tube in the four quicksilver baths connecting cartridge to riia was quite intriguing.
  4. Wonderful. Listened and appreciated it. Only afterwards did I realise she's from my home country - never heard about her before. Shame on me.
  5. No it's not. Generalised opinions like this should be avoided.
  6. Now isn't that a rare choice. I bought his "Jonas Fjeld Rock and Rolf Band" in the 1970s, on sale at Waidele in Gothenburg. A terrific, original and inspired recording making fun of present trends with a satire twist ("Bridge Over Tonic Water"). A forgotten masterpiece that still excites.
  7. Count me in as well. Fine amp, does its duties alongside Dynalo, M3 and Squarewave (and soon Dynahi). Runs it with Russian gold grid 6N1P tubes.
  8. Thanks. Of course a small homage to the Swedish radio manufacturer 'voice of Scandinavia' (1940s). The vintage knob has the patented double dot feature which guarantees perfect channel balance. On-off switch is a spiffy little Russian thing with nice M1,6 threads. Bought a pair from Bulgaria delivered in oiled paper. Strange thing: manufacturer has the same name as me.
  9. Gonna start Dynahi next, on board heatsinks and double mono in two boxes, and wonder if anyone konows where I can source two SJ109 jfets to go with the SK389s I got.
  10. Does anyone possibly have a couple of sj109 to complement my sk389s?
  11. This is outrageous! I just got a 0,002V shock from my 4xx, an outburst that enhanced dynamics subtly but perceptably. 5th layer stereo depth, black background etc.
  12. Anyone got a TKD 2CP 601 stereo pot to spare?
  13. Squeezed this amp into a small Modushop case. Tight fit for the caps, but it works. Doesn't get particularly warm. An interesting alternative for planars.
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