I wasnt sure if this belonged here, or in the source forums but they dont have a builds thread.
Rega planar 2 with RB-250
mods to date:
upgraded ball bearing.
cork "dot" platter mat
1000cst silicon oil in bearing well.
Teflon taped tonearm
counterweight setscrew modified to lock onto tonearm
Grado Red with longhorn mod
squash-ball suspension with a fluid damper made from a bottle-cap.
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Originally Posted by mkmelt
ACHTUNG - ALLES KOPFPHONERLISTENERS
Alles kopfphonerlisteners non-technischens! Das tubenmachine is nicht for gefengerpoken und mittengrabben. Oderwise is easy schnappen der springenverk, blowenfus, und poppencap, mit spitzensparken, und smokentubes. Geverken inside der tubenmachine is fur der experten only. Is nicht fur geverken inside by das dumpkopfen. Das rubbernecken amateuren keepen das cotton-picken hands in das pockets. Just relaxen, enjoyen der musik, und vatchen das pretty glowentubes.
My dynomat extreme came for my D5000's, but my D5000 are in Florida (I think)
so I dynomatted the undercarriage of the Rega.
__________________
Originally Posted by mkmelt
ACHTUNG - ALLES KOPFPHONERLISTENERS
Alles kopfphonerlisteners non-technischens! Das tubenmachine is nicht for gefengerpoken und mittengrabben. Oderwise is easy schnappen der springenverk, blowenfus, und poppencap, mit spitzensparken, und smokentubes. Geverken inside der tubenmachine is fur der experten only. Is nicht fur geverken inside by das dumpkopfen. Das rubbernecken amateuren keepen das cotton-picken hands in das pockets. Just relaxen, enjoyen der musik, und vatchen das pretty glowentubes.
Just finished this little baby for office use: a modified Kumisa III @ ±24V DC (with a couple of traces cut and some resistors changes).
... heavily heatsinking on the bottom, which allows quiescent current biasing at 60mA,
... and the guts
I'm not good when it comes to describing the sound, but in short... a very musical, laid back sounding amp without any sign of distortions, noise, hiss or hum.
It makes this hobby (DIY) so fun.
__________________ Marantz SA11-S1 => Balanced β22 => Sennheiser HD 650
Very nice Ferrari! The usual: case I assume is the Italian Galaxy (sorry, forget the brand)? Nice use of the interconnect cabling for the input wiring... was it much of a problem soldering to the pot?
Pars, the case is a HiFi2000 Galaxy GX248. Using the interconnect cabling for the input wiring requires a bit creativity and precision work, but it's do-able.
(however... 10mm too long or too short and you are (I am) in trouble)
The knob backlighting still needs some modification to let the blue light up surrounding the knop, as a blue ring... but that is for later, when time permits.
I have too much work in the queue: lots of work on my β24 proto is waiting, also the casework for the Bijou proto I made months ago still needs to be done.
Gewa, the small blue PCB is a custom made ±15V power supply for the DC servo circuit.
The amp itself is running at ±24V and that is out specs of the OpAmp used in the DC servo circuit (max OpAmp supply is ±18V), therefore the small PS was added.
I let the Kumisa running at ±24V to give it some extra voltage swing (not that the original CK²III was too bad or something... it more likely that I am a tinkerman, in one or other way ).
__________________ Marantz SA11-S1 => Balanced β22 => Sennheiser HD 650
±24V Kumisa III
).
Linear Mode
