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DIY TDA1541A PCB "D3"
DIY TDA1541A PCB "D3"
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Old 8th May 2021, 02:01 PM   #981
obh is offline obh  Norway
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Join Date: Aug 2016
DIY TDA1541A PCB "D3"
Count me in for two if price ok...

Supersurfer .....1 at least
aguaazul ...........2 (maybe 4)
al2813..............1
ernesternest ....1
ppap64 ............2
asanden ......... 2
Vunce ............. 1
androa76 ........ 1
savvas ............ 2
analog_sa.........2
darrr....... 1
also showed interest
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bisesik
obh ................ 2
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Old 8th May 2021, 03:11 PM   #982
Mayday is offline Mayday  Sweden
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Join Date: Mar 2004
Location: Sweden
DIY TDA1541A PCB "D3"
Supersurfer .....1 at least

aguaazul ...........2 (maybe 4)
al2813..............1
ernesternest ....1
ppap64 ............2
asanden ......... 2
Vunce ............. 1
androa76 ........ 1
savvas ............ 2
analog_sa.........2
darrr....... 1
Mayday....... 1 (maybe 2)
also showed interest
advr
bisesik
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Old 8th May 2021, 03:12 PM   #983
LinuxGeek is offline LinuxGeek  Germany
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Join Date: Jul 2015
Location: Germany, NRW
If not crazy price, i would also take one.
Supersurfer .....1 at least
aguaazul ...........2 (maybe 4)
al2813..............1
ernesternest ....1
ppap64 ............2
asanden ......... 2
Vunce ............. 1
androa76 ........ 1
savvas ............ 2
analog_sa.........2
darrr....... 1
also showed interest
advr
bisesik
obh ................ 2
LinuxGeek ........... 1
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Old 8th May 2021, 03:28 PM   #984
sumotan is offline sumotan  Indonesia
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Wow the response is so overwhelming it may scare the living daylights out of Supersurfer. Lol
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Old 8th May 2021, 03:45 PM   #985
Mayday is offline Mayday  Sweden
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Join Date: Mar 2004
Location: Sweden
DIY TDA1541A PCB "D3"
Supersurfer .....1 at least
aguaazul ...........2 (maybe 4)
al2813..............1
ernesternest ....1
ppap64 ............2
asanden ......... 2
Vunce ............. 1
androa76 ........ 1
savvas ............ 2
analog_sa.........2
darrr....... 1
Mayday.... 1 (maybe 2)
also showed interest
advr
bisesik
obh ................ 2
LinuxGeek ........... 1
__________________
The more you learn, the more you realize how little you know...
My blog, go have a look
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Old 8th May 2021, 03:53 PM   #986
Malvin is online now Malvin  United States
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Join Date: Jan 2006
Location: New York
DIY TDA1541A PCB "D3"
Supersurfer .....1 at least
aguaazul ...........2 (maybe 4)
al2813..............1
ernesternest ....1
ppap64 ............2
asanden ......... 2
Vunce ............. 1
androa76 ........ 1
savvas ............ 2
analog_sa.........2
darrr....... 1
Mayday.... 1 (maybe 2)
also showed interest
advr
bisesik
obh ................ 2
LinuxGeek ........... 1
Malvin ......1
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Old 9th May 2021, 04:14 PM   #987
simon dart is offline simon dart  United Kingdom
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Join Date: Mar 2004
Location: Herefordshire
Off topic I know but I just swapped Pedjas AD844 output stage for Thorsten's ECC88 anode follower. My D3 is plonked in the middle of a total lash up just to feel the right direction to go, but I did the tube power supply with some care as its critical. I'm quite staggered with the transformation. If you haven't tried tubes with the D3 I'd strongly encourage it.
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Old 9th May 2021, 07:58 PM   #988
savvas is offline savvas  Greece
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Join Date: Mar 2004
Location: Salonica
I guess it's alright to talk about output stages in D3 thread, in some extend, not hijacking it
That's an early S1 you've got there. Other than Lundahls what other care you are referring ?
What you like more in the tube output stage vs AD844 ? I guess that AD844 was doing the buffer duties also or was it Jfet based ?
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Old 10th May 2021, 07:54 AM   #989
simon dart is offline simon dart  United Kingdom
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Quote:
Originally Posted by savvas View Post
I guess it's alright to talk about output stages in D3 thread, in some extend, not hijacking it
That's an early S1 you've got there. Other than Lundahls what other care you are referring ?
What you like more in the tube output stage vs AD844 ? I guess that AD844 was doing the buffer duties also or was it Jfet based ?
My S1 is the only remaining part I have from an Arcam 70.2 I bought thirty years ago!

The HT is CRC filtered with some Mundorf Mlytic AG+

Pedja's early AD844 AYA circuit is not in the public domain, so I can't post it. It's similar in principle to the later OP861 circuit.

OPA861 zero-feedback output stage of AYA II - Audial

Obviously Pedja's circuit uses a LOT less resources and does sound better than any conventional opamp i/v I've tried but the ECC88 has so much more air, spaces between instruments open up, tiny details emerge and the soundstage grows deeper. Complex harmonic structures are more resolved. The only downside is the bass has put on a few inches around the waistline Early days though, much more tweaking to be done!
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Old 10th May 2021, 07:57 AM   #990
manniraj is online now manniraj  India
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@ryan, please check my PM regarding the i2s2sm V2 boards and the shipments with few updates regarding my build.

Thanks
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