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mwl168 last won the day on July 31 2019
mwl168 had the most liked content!
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Switched from Megatron to the Blue Hawaii this morning. Different sound signature but equally as satisfying. This one is not the BJT version but the one that uses 2SK216/2SJ79 with cascoded CCS and adjustable plate current.
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The balanced amp gives twice the voltage swing and slew rate and 4 times the output power. Wether that matters for a headphone like HD650 is debatable. My personal opinion is yes. The motto here at HC is "moar is better" and never pass a chance to go overkill
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I bought a bunch of tta004b/ttc004b for this exact purpose but have not tried them yet. Would be nice if we can find something that's also pin-compatible with 2SK216/2SJ79.
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I see now that I missed it - I thought you built a SUSY Dynalo and only used one phase of the balanced output. I see now it's actually a single-ended Dynalo. Did you follow Kevin's original Dynalo schematic from many years ago?
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Probably not a bad idea to also get the corresponding KSC2690 as well.
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Nice review and pics. How would you describe the build quality and durability of the ES 1a compared to the Stax 007?
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I also really like my HD800 with my balanced KG CFA 🙂
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Megatron Electrostatic Headphone Amplifier
mwl168 replied to kevin gilmore's topic in Do It Yourself
That's what I am using in my Megatron as well, Philips E180CC SQ. Very happy with the outcome. -
Megatron Electrostatic Headphone Amplifier
mwl168 replied to kevin gilmore's topic in Do It Yourself
Single digit temperature outside. Time to power up this glorious sounding amp. What a treat...- 857 replies
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TKD 4CP-601 & 4CP-2500 4-gang volume pot and PCB GB
mwl168 replied to mwl168's topic in Do It Yourself
I am in US and figured you are in UK thus the comment on the shipping cost. -
TKD 4CP-601 & 4CP-2500 4-gang volume pot and PCB GB
mwl168 replied to mwl168's topic in Do It Yourself
I may have spare boards left but, given the shipping cost, it probably makes more sense for you to have them fabricated. -
Can anyone offer advice on how to replace the pot in my KGSSHV?
mwl168 replied to loz_the_guru's topic in Do It Yourself
A much better idea is to see if you can obtain one of the pot PCB from a GB (or other sources) some time ago so you don't need to solder directly to the pins on the pot. No need for fancy solder IMO. I have solder from Cardas, WBT and good old Kester and don't believe either one makes an audible difference. Get a good quality solder and solder the joints well is key. -
Ageing of human hearing and expensive high-end headphone gear.
mwl168 replied to Werner42's topic in Headphones
My car has over 400 hp and can go over 150 miles/hour. Even though I don't use all that power nor intend to drive it anywhere near that speed. I enjoy it just as much. -
dean Hartley started following mwl168
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Check out Kevin's (Dr. Gilmore) current feedback electrostatic amp if you are looking for a compact and first DIY project. I suggest it because it's easy to build, low cost with very simplistic power supply requirement and, more importantly, a very nice sounding solid state amp that uses all current production parts.
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The original design of Blue Hawaii uses 2SK170 BL grade which has the IDSS grade in the same range of LSK389B. Double check the data sheet to confirm. 2SK170/LSK389 are JFET so using either 10K or 50K volume pot should be fine. 10K pot may be more ideal if your source can drive it.