Hi,
I'm new here and I've only ever built guitar amps... probably close to 20 of them or so now. But don't have the money or time for that much anymore.
But I would really like to build a tube Headphone amp to power my 250 ohm DT-990 headphones that I use at my home computer desk. I would also like the option of using it in the signal path between my DAC and little Fosi TB10D desktop speaker amp as well. Even though someday when I can afford it, I'd like to build a full Tube stereo amp, I think I should be able to build an OTL headphone amp for now since I need to drive higher impedance cans.
The crack is intriguing and the Xduo TA-26s caught my attention with all it's rave reviews as well.
Does anybody have more informatiion on either of those as far as an appropriate PT or schematics? I've seen some variations of schematics for the Darkvoice which is similar (but not as well-liked).
It seems like I'm looking to get maybe around +135VDC after the bridge rectifier and +115VDC on the plate of that 6AS7 tube plates.
Any thoughts or experience in this general area would be appreciated!
The Crack style of build seems to be what I'm after (just on terminal strips) , but I think I have enough spare parts around that I don't want to buy the kit just for the PT.
Thanks so much!
I'm new here and I've only ever built guitar amps... probably close to 20 of them or so now. But don't have the money or time for that much anymore.
But I would really like to build a tube Headphone amp to power my 250 ohm DT-990 headphones that I use at my home computer desk. I would also like the option of using it in the signal path between my DAC and little Fosi TB10D desktop speaker amp as well. Even though someday when I can afford it, I'd like to build a full Tube stereo amp, I think I should be able to build an OTL headphone amp for now since I need to drive higher impedance cans.
The crack is intriguing and the Xduo TA-26s caught my attention with all it's rave reviews as well.
Does anybody have more informatiion on either of those as far as an appropriate PT or schematics? I've seen some variations of schematics for the Darkvoice which is similar (but not as well-liked).
It seems like I'm looking to get maybe around +135VDC after the bridge rectifier and +115VDC on the plate of that 6AS7 tube plates.
Any thoughts or experience in this general area would be appreciated!
The Crack style of build seems to be what I'm after (just on terminal strips) , but I think I have enough spare parts around that I don't want to buy the kit just for the PT.
Thanks so much!
https://www.diyaudio.com/community/threads/6n3-6n6-headphone-amp-using-pcb.363591/
Headphones are designed to be driven from around 100R impedance, they can produce a peak at 5KHz otherwise. ECC99 can pass more current if you need it than a ECC88. If you want to use a transformer a small 1va6 toroid 120-0-120 to 12v works quite well if driven with a LTP. The frequency starts to roll off at about 5KHz but NFB can be used to correct this.
Just some ideas - you will get plenty more.
Try ECC99 headphone amp. There's also the WCF. Your impedance is high so maybe ECC88 will be just fine. 32R headphones require more current.
Headphones are designed to be driven from around 100R impedance, they can produce a peak at 5KHz otherwise. ECC99 can pass more current if you need it than a ECC88. If you want to use a transformer a small 1va6 toroid 120-0-120 to 12v works quite well if driven with a LTP. The frequency starts to roll off at about 5KHz but NFB can be used to correct this.
Just some ideas - you will get plenty more.
Try ECC99 headphone amp. There's also the WCF. Your impedance is high so maybe ECC88 will be just fine. 32R headphones require more current.
I like how complete this documentation is.... Thanks! I'm seriously looking at this model. I'm curious to know how many people have tried it and their impressions.... It looks like it is the same idea for the most part that these companies are trying to use.
I like the John Broskie "Aikido" headphone amp from Tubecad.com. No OPT and John sells beautiful PC boards for either the octal or nine pin tube versions. But of course you could hard wire them instead. Use the back and next buttons at the top on his site to see more.