Wadia x64.4 sledgehammer output stage problem - Page 3

RobertS61 · 15th September 2020, 04:35 PM

That would be even greater but there's some controversy on that diamond buffer issue:
RJM Audio - The B-board Buffer Stage

Can't discuss that with you because lack of knowledge, but they put them in for a reason, I reason

RobertS61 · 08:31 AM

Quote:

Originally Posted by analog_sa

These, being diamond buffers with no voltage gain should be easy enough to troubleshoot even without a scope. Just take them out and jumper IN to OUT.

It may even sound better that way.

Now I understand what you say.
Solder them out and short the PCB pin inserts where pin 4 and 8 where?
HA5002:
https://www.diyaudio.com/forums/atta...1&d=1600241481

https://www.diyaudio.com/forums/atta...1&d=1600241271

analog_sa · 16th September 2020, 11:01 AM

Yes. The buffers are there in order to drive longer and higher capacitance cables. In some situations the buffers may be beneficial, but they also steal some transparency.

RobertS61 · 16th September 2020, 11:09 AM

The Yes part of your answer means I can pull those opamps out and short pin 4 and 8?

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15th September 2020, 04:35 PM	#21
RobertS61 diyAudio Member Join Date: Jul 2007	That would be even greater but there's some controversy on that diamond buffer issue: RJM Audio - The B-board Buffer Stage Can't discuss that with you because lack of knowledge, but they put them in for a reason, I reason

16th September 2020, 11:01 AM	#23
analog_sa diyAudio Member Join Date: Aug 2002 Location: Cascais	Yes. The buffers are there in order to drive longer and higher capacitance cables. In some situations the buffers may be beneficial, but they also steal some transparency.

16th September 2020, 11:09 AM	#24
RobertS61 diyAudio Member Join Date: Jul 2007	The Yes part of your answer means I can pull those opamps out and short pin 4 and 8?