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Yes, they are Context Engineering's and they aren't cheap but are much nicer (IMHO) then Hammond's stuff and made the size that I wanted. The only question now is what to do with the "spare" case that I have...
Did you purchase them at Fry's? Or another place? Also, what size are they?
Perhaps you should drop a Millett into the spare one I'm sure you have plenty of boards to make 'em!
I'll have to post my Pimeta, mint and monica 2 DAC builds of them when I have time to take the pics. I do like their black anodized ones more, but the natural brushed aluminum tends to show chips/dings/scratches much more easily than the hammonds.
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Home 'Phones :: K-701, HD-600, HF-1 Work 'Phones :: DT-231, KSC-75 Transport :: NEC CD-602, Samsung HD-841, Zenith DVD Digital :: Mod'd SuperDAC 2496, Monica 2, audiodiylab DAC-101 (PCM1739), Mod'd Nakamichi PCM1702 Portable :: 40GB Zen Touch + mini^3 + KSC-75 Solid-State Amps :: PPA v1.1, Pimeta, Mint, mini^3 Hybrid Amps :: Millett Hybrid, Millett Hybrid Max, SOHA Hollow-State Amps :: Optimized Morgan Jones, Laconic Lunchbox Misc :: Neutrik/Switchcraft + Canare Interconnects
In progress :: M^3, Balanced MH/MHMax, Aikido Hybrid, Szekeres Class A, Mini Zen, Van Waarde OTL
Just finished my millett w/ diamond buffer a couple days ago. Thanks goes out to those who helped me get the boards. Still haven't decided how I want to case it up though.
Did you purchase them at Fry's? Or another place? Also, what size are they?
I purchased them from another location. They are the largest size (6x3x8.5), I had to go that big to fit the stepper in there comfortably and there may be a few extra add-ons that go in there eventually too that will take up more space (think switched inputs, output protection, etc.).
photos prompted by yet another thread saying it couldn’t be done – Class A Op Amp Headphone Amp - not the “usual Class A op amp bias with a Buffer” but Full Output Swing Class A Bias from Op Amps
The heat sink is a Zalman Golden Orb II, drilled and tapped for a ¼-20 ss socket head screw which protrudes from the center of the Cu slug bottom and to which the pcb carrying the TPA6120s is clamped
The 6 TPA prints of Artic Silver are visible on the Cu slug of the Zalman
The Al tripod has nylon pcb standoffs cut down to press on the pcb – the conical spring washers maintain clamping force
The TPA6120 op amps were laid down belly up on the pcb and each leg was bent down and soldered (how? – very carefully, with the aid of optics) – You can see I didn’t bother to bend down all of the legs – some are not connected internally in the TPA
The pcb turned out to be flat enough that even with the 6 packages there was only a few mil of unevenness – plenty small enough gap given the Artic Silver thermal conductivity (don’t get it on the circuitry – not formulated as a electrical conductor it still can be a problem)
I’m sure there are simpler solutions possible but I wanted a “universal” proto amp +/-24 V swing for Hi Z cans and +/-440 mA pk Class A for Lo Z cans – these #s give ~ 25 W total power dissipation in Class A for the 2 channels/6 TPA6120s
[heatsink discussion in "AD8397-class A?" DIY thread]
I wanted a Dynalo for my desktop rig and I wanted it to have the same length like my CDP, so I went for a "4 chamber" design: (1) transformer, (2) psu, (3) rca input + volume pot, (4) amp board. Each chamber consists of a standard eurocard-sized enclosure, tied together by a large front- and rear-panel made by FPE:
(click on pic for full scale image)
It would have been a shame to bury the precious amp board in a case and I wanted to admire the board from the outside while it is at work, so I implemented a window into the frontpanel. Additionally I always wanted an illuminated volume knob and finally made the present for myself Amp board and volume knob are illuminated by blue LEDs of 2000mcd.
I'm sure you have plenty of boards to make 'em!
Amp board and volume knob are illuminated by blue LEDs of 2000mcd.
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