Laowei

What tubes? JJ 6CA7 and KT77 tubes have problems in the DIY T2 circuit.

What $24,000 will buy you these days. PS: it’s parent company is Sonoma Acoustics. https://audiophilestyle.com/ca/audio-shows/exclusive-warwick-acoustics-aperio-electrostatic-headphone-system-r792/ https://cdn.computeraudiophile.com/article-images/2019/0416/The-APERIO-from-Warwick-Acoustics.pdf Must not sound too good, as the video is silent.

FYI: Search on eBay for STAX EP-007. Five Japanese vendors have pairs for sale there.

Something lost in the translation to Chinglish? ? I learned that Fang is either a retard or deliberately trying to con his customers by using an Ohmmeter to “measure” the DC resistance of a transformer with 1000VDC across it. All in an apparent attempt to negate/quantify transformer AC leakage impedance/reactance current that shocked the YouTube video guy. Naturally, the VOM’s overvoltage protection kicks in and an “infinite resistance” is displayed. Just as intended? You don’t need to be Penn and Teller to spot that slight of hand.

Very interesting the design innovation and manufacturing development you are sharing here, Aumkar. It’s a pleasure to see such openness and transparency in this over hyped headphone market. Looking forward to hearing them when available.

For part time use for a hobbyist, those look perfect. When cutting or hacksawing screws to length, always first screw a hexnut past the length to be cut off and then mark the cut line on a single wrap of masking tape around the screw. The tape helps the hacksaw from walking, and after the extra length cut off, unscrewing the hexnut helps straighten the mangled threads. Cleanup with a chamfer on the end using a hand file.

Best to hear from Justin on your issue.

I actually tried to get banned over there Pars. Even called John Amatto a Gaslighting Audio Whore. They just deleted both of our back and forth posts with a warning. ?

Was the offset value measured in both channels the same @ -27V, -11V?

Quite a pretty sight, all those T2 variants in one place.

Really nice build, Jose.

Another Gilmore CFAE is first powered up. No smoke, no POP, no drama. I used the first GB split PCBs for this build. All part values per the PCB. Powersupply for the moment is a BHSE from an old KGST: B+ = +353.8; B- = -358.1 Left Channel Offset: +7.19/+10.53; Balance: 3.34; Bias(mA): 8.28/8.24/8.23/8.15 Right Channel Offset: +8.42/+8.91; Balance: 0.49, Bias (mA): 8.35/8.23/8.68/8.60 After an hour, heat sinks are barely warm to the touch. Hooked up with an iPhone X direct input as source and STAX 207 it sounds very promising. Will swap in a TKD volume pot soon to see if things improve ditching the distal volume control. Thanks to all, especially Kevin, Congo5, Joachim, Michael, and Jose.

Great work Joachim! Makes me wonder if you are a watch maker by profession.?

Very nice, Joachim!

This is great. Thank you Michael. Would you please add 1 mini T2 PCB to my row.

Depending on cost, I’d like at least one. Maybe more.

I was only curious what Jose was using, as my heat sinks are about the same size as his. For first power up, I wanted to be able to run them awhile without worry as a baseline. Did not wish to cause big confusion here for no reason. Thanks to each for your input.

Yes, those are the ones. Joamat had experimented with different values and was wondering if you did too. Got to order 4 more for the other channel. As usual, a great looking build, Jose.?

I’m almost there too. Did you use 2K ohm for your base resistors, or another value?

Yeah, thanks Kerry!

Nice to see they got married. That’s legal now in most countries around the world.

Geoff does incredible work.

Received my mini T2 and CFA PCBs from mwl168 this morning. These are excellent quality! Many thanks to Michael and Joachim!

Please consider labeling the title and actual file with the running revision level on: 1) schematic.PDF 2) BOM.xlsx 3) Gerber and PCBs. Otherwise this could quickly get messy....