Name / Units / Country
—————————————
Plott / 1 amp / Austria / order placed
ugly woofer / 1 amp / order placed
yoaudio / 1 amp / order placed
rhing / 1 amp / USA / order placed
bkhatton / 1 amp / USA / order placed
turion64 / 1 amp / USA/ order placed
Etsy indicates 8 of 9 units taken but only 6 names here...
—————————————
Plott / 1 amp / Austria / order placed
ugly woofer / 1 amp / order placed
yoaudio / 1 amp / order placed
rhing / 1 amp / USA / order placed
bkhatton / 1 amp / USA / order placed
turion64 / 1 amp / USA/ order placed
Etsy indicates 8 of 9 units taken but only 6 names here...
I bought just the PCB last time X....hand soldering all those SMDs was way too tedious and I did something wrong somewhere so I opted for a fully functioning unit this time.
Any thoughts of mimicking the unique PFFB in the PA5's little black sealed module?
There was a tear down on that module so the details of its construction are available if you look here:
https://www.diyaudio.com/community/...s-a-modification-worth-it.380233/post-7149020
gamerpaddy said:
“Lots of feedback and two gain stages in series (NE5532 and OPA1612A). Topping is using different parts from what the Ti document recommends.
instead of R_fb 33k, its using 9.9k (spread over 3x3.3k resistors) and R_fb_gnd is 750 ohms instead of 10k.”
The gain and feedback settings are a bit different but the topology is pretty much the same. You can try to copy those values if you wish but it was optimized for TPA3251.
https://www.diyaudio.com/community/...s-a-modification-worth-it.380233/post-7149020
gamerpaddy said:
“Lots of feedback and two gain stages in series (NE5532 and OPA1612A). Topping is using different parts from what the Ti document recommends.
instead of R_fb 33k, its using 9.9k (spread over 3x3.3k resistors) and R_fb_gnd is 750 ohms instead of 10k.”
The gain and feedback settings are a bit different but the topology is pretty much the same. You can try to copy those values if you wish but it was optimized for TPA3251.
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Comparing above list with previous list:
Name / Units / Country
————————————————
turion64 / 1 amp / USA / order placed
Martial31 (Etsy) / 2 amps / USA
Vishal Devgon/India/ 1 stereo amp
Dr Rasta / 1 amp / USA
Saniasin/ 1 amp / ?
Bkhatton / 1 amp / USA / order placed
Rhing / 1 amp / USA / order placed
ugly woofer / 1amp / USA / order placed
Plott / 1 amp / Austria / order placed
yoaudio/ 1 amp / USA / order placed
We see that Vishal Devgon, Dr Rasta, Saniasin, and Martial31 have not placed their orders yet.
It is ready to run (use): provide PSU and connect audio in and speakers.
If you mean ready to use PSU and chassis and buffer included all assembled then may I suggest the commercial LSA Warp-1 amp. Uses the same core and has great reviews, for example, on line written reviews and video review.
If you mean ready to use PSU and chassis and buffer included all assembled then may I suggest the commercial LSA Warp-1 amp. Uses the same core and has great reviews, for example, on line written reviews and video review.
Watching Thomas' review is so much fun. What an animated and gifted video reviewer.
If I perfect my hot air station skills, I might go for your TPA3255 board. This weekend I'm going to practice on the headphone protect board, then move on to the three Panel Mount BTSB boards I have. If they test fine (I have a Keysight scope with Bode Plot capability), perhaps the TPA3255 is in the future.
Best,
Anand.
Hi Anand,
I have hand soldered two TPA3255 boards and would not want to do another one. But there is a certain soothing satisfaction to it like knitting or wood carving etc. a good manual solder paste dispenser can make things much easier than a plain hypo syringe.
This is a very good investment to prevent hand cramping and better solder application:
https://a.co/d/6Ep6N2R
Use these nozzles:
https://a.co/d/gEnKSCU
I have hand soldered two TPA3255 boards and would not want to do another one. But there is a certain soothing satisfaction to it like knitting or wood carving etc. a good manual solder paste dispenser can make things much easier than a plain hypo syringe.
This is a very good investment to prevent hand cramping and better solder application:
https://a.co/d/6Ep6N2R
Use these nozzles:
https://a.co/d/gEnKSCU
In case anyone wants a RTR Panel Mount BTSB buffer to go with this amp, I am now taking pre-orders here. They will be sold for $165 each as part of the GB.
https://www.etsy.com/listing/1376892619/rtr-panel-mount-btsb-buffer-preamp?click_key=5c33cd695b30c6107ce3a782372e5b9f969f1d75:1376892619&click_sum=e674c5de&ref=shop_home_active_1
https://www.etsy.com/listing/1376892619/rtr-panel-mount-btsb-buffer-preamp?click_key=5c33cd695b30c6107ce3a782372e5b9f969f1d75:1376892619&click_sum=e674c5de&ref=shop_home_active_1