Here you have some good links:
Armageddon Clone
Neil's turntable power supply page
DIY Geddon - LP12 power supply - pink fish media
More food for the mind.... I did not realize Mercury is so dense that a heavy steel platter can float on it.
......and the effect on the human system??? I doubt that such a TT would be allowed under current legislation.
................in which the mercury is totally sealed.😉
...........................until you drop them that is🙂
There is an oil film on the mercury when you look closer to the drawing to prevent evaporation.. Anyway, i would be scared to build something like that. The Michaelson-Morley experiment to measure the speed of light was done by floating a granite plate in mercury. Yes, it is quite heavy.
2 days ago a dream came true. AS brought me a Wandel & Goltermann measurement system from 1975 he had saved for me. It can measure harmonic distortion and intermodulation.
Also level. Specs are not so impressive then say an Audio Precision or Rohde & Schwarz but what i read on the web practical specs are much better then the claimed -80dB. This is from a time where the manufacturers gave minimum specs under worse case conditions.
The building quality is overwhelming. This is heavy, properly made machinery.
Also level. Specs are not so impressive then say an Audio Precision or Rohde & Schwarz but what i read on the web practical specs are much better then the claimed -80dB. This is from a time where the manufacturers gave minimum specs under worse case conditions.
The building quality is overwhelming. This is heavy, properly made machinery.
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Had the sowter's at time.. but must say I clearly preferred a battery powered Le PRE PRE..come to think of it...you could have been the one that supplied the Sowters to LA...who then gave it to me...🙂
That was a Pikatron transformer. It looks quite similar but the Sowter is much bigger in size and i hope of better quality. Yes, Lennard was never really happy with the transformers i send him. We started a discussion how we could improve matters but the project bit the dust in the end. That was busy times where we have being involved into many things so this little project was not that important.
I have no choice anyway. The guy i am building for at the moment demands a transformer input with inductive RIAA and tube output stage. I have tried the 9226 and must say that it is much better then transformers i tested 15 years ago so progress has being made. The Pikatron barely reached 20kHz and had a treble resonance in the ultra sonics but this new ones go the 100kHz. Whereas i experienced a loss in resolution and extension in several transformers i tried
a longer time ago this Lundahl did sound good in the treble.
I have no choice anyway. The guy i am building for at the moment demands a transformer input with inductive RIAA and tube output stage. I have tried the 9226 and must say that it is much better then transformers i tested 15 years ago so progress has being made. The Pikatron barely reached 20kHz and had a treble resonance in the ultra sonics but this new ones go the 100kHz. Whereas i experienced a loss in resolution and extension in several transformers i tried
a longer time ago this Lundahl did sound good in the treble.
Hope for sure they are better....Your'e right they were piketron...I think I remember something about mumetal shielding...
BTW the first LA-Audio mono tube Rias's were quite good...the tin/PS caps and the special F&T coupling caps were good....we also tried Rieken resistors but they sounded dusty and dull...
BTW the first LA-Audio mono tube Rias's were quite good...the tin/PS caps and the special F&T coupling caps were good....we also tried Rieken resistors but they sounded dusty and dull...
I still listen each day to my 6550 LA Audio mono blocks. I have only pimped them a bit and use selected tubes. In it´s 25W range it still sounds up to date. What i need is a medium power transistor amp for the low sensitivity speakers i develop from time to time for other people.
When I'am done and thing are playing .. I'll supply you the details. som small changes have to ba applied to the circuit....some extra resistors and different sniffpiont for the RF feedback and a little higher gain..all to make it unconditionally stable also without output coil...
Yes those trafos of the LA-- are still hard to beat... actually i believe i have a set....Maybe it's time to rework those...
M
Yes those trafos of the LA-- are still hard to beat... actually i believe i have a set....Maybe it's time to rework those...
M
I used a LL9206 as a sut for a Goldenote Tuscany cart (0.15mV) on a 48dB jfet input Riaa.
It worked like magic 🙂
I am planning to upgrade to a Sowther Type 1990 (Jensen sut are too expensive IMO) so I am looking forward for your measurement results 🙂
It worked like magic 🙂
I am planning to upgrade to a Sowther Type 1990 (Jensen sut are too expensive IMO) so I am looking forward for your measurement results 🙂