Well, adding 2SJ162 you could but I don't see why it would be more interesting than using ECX10N/ECX10P. Some F7 clones were built using ALF16, which are the same as ECW20 series., and ECW20 were used as well
I prefer to use ECW20 because of double transconductance and 0.6 V lower Vgs required for the same current, compared to ECX10. That makes a difference with distortion and clipping point on circuit supplied from 14 V rails. Larger Ciss can be countered by increasing U8 Ccs current.
I prefer to use ECW20 because of double transconductance and 0.6 V lower Vgs required for the same current, compared to ECX10. That makes a difference with distortion and clipping point on circuit supplied from 14 V rails. Larger Ciss can be countered by increasing U8 Ccs current.
Begin with make a PCB for this a little more simple amplifier.
https://www.diyaudio.com/community/threads/exapp-class-a-push-pull-6-watt.397723/latest
Use only through holes components, Please. No SMD.
Thank you.
No. See curve tracing :
https://www.diyaudio.com/community/threads/uthaim-just-for-fun.306350/post-5338019
Patrick
Oh, good to know.
I still have 25 pcs BUZ900 (160V version of 901) in original packing.
Same price as BUZ901.
Still cheaper than Semisouth.
https://www.cricklewoodelectronics.com/BUZ900.html
https://www.cricklewoodelectronics.com/BUZ901.html
🤓
Patrick
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Those tube guys love BUZ900/901.
You can find many circuits at websites like tubebcad / audiodesignguide.
But this is off topic. Don't want to hijack.
Patrick
You can find many circuits at websites like tubebcad / audiodesignguide.
But this is off topic. Don't want to hijack.
Patrick
Hi Lineup and rest of the forum
Here is 2 ch pcb layout for your amplifier, I designed it for 2SK1056 as I have around 200 of them (NOS)
The basic idea with the layout is that you can have both channels on one large heatsink or you can cut the board in two to have a pcb on each heatsink, i will build it and give some feedback and i can also make pcbs available if any interest
Layout is made in Kicad and size is 4" x 4" (100 x 100mm) 2 layers, all through hole
Here is 2 ch pcb layout for your amplifier, I designed it for 2SK1056 as I have around 200 of them (NOS)
The basic idea with the layout is that you can have both channels on one large heatsink or you can cut the board in two to have a pcb on each heatsink, i will build it and give some feedback and i can also make pcbs available if any interest
Layout is made in Kicad and size is 4" x 4" (100 x 100mm) 2 layers, all through hole
Attachments
https://www.tubecad.com/index_files/page0028.htm
https://www.rtaudiodesign.com/w/products/301-2/single-ended-class-a-amplifier/
But I thought you hate FETs ? 😀
"I will never do mosfet/FET amplifiers, because ***FETs hate me, and I hate them."
https://www.diyaudio.com/community/...-watt-with-low-distortion.397378/post-7311646
It's all gone quite, so I allow myself just once more being off topic. 🤓
Patrick
I like where you're going with this, but I still like my pet ideas on mixed-mode and current feedback more. I need to up my pace!
The J113 current looks very heavy in a couple of places. Does it really bring down the distortion that much to run them so hot?
Elvee's Circlophone has an interesting idle current balancing scheme, which maybe could be adapted to single-ended..
The J113 current looks very heavy in a couple of places. Does it really bring down the distortion that much to run them so hot?
Elvee's Circlophone has an interesting idle current balancing scheme, which maybe could be adapted to single-ended..