Explendid amplifier designed by Michael Bittner, our MikeB

[AndrewT]

The DCB1 is a DC coupled source.
You should not bypass the only DC blocking capacitor.

If you have the experience to recognise the pitfalls of converting an AC coupled system into a mixed AC and DC coupled system then go ahead and make that informed decision.

The B1 is an AC coupled source and with that you can safely bypass the DC blocking cap in the Symasym.

[sakis]

Originally Posted by AndrewT

probably lot's of people have tried.
Take any AC coupled Power Amplifier and connect it to an AC coupled output stage of the source equipment.

You now have doubled the DC blocking capability of the Source to Amplifier connection.

There is absolutely no benefit in double blocking the connection.
The solution is easy.
Go into both pieces of equipment and determine which blocking capacitor is doing most harm to the resulting sound quality. Short out that "not so good" blocking capacitor.

That solution is quite different from "Symasym without coupling caps".

Andrew is right (as usual) this is a very nice idea and often can be a huge improvment where ever is possible to do so .

[AndrewT]

Originally Posted by sakis

Andrew is right (as usual) this is a very nice idea and often can be a huge improvement where ever is possible to do so .

and why I have been advocating dual inputs to Power amps and dual outputs from Sources.
Going back to Jens' Leach clone where he had installed 3pin input (0.1" sil) for the PCB.
The 3 pins offered AC coupled, or "test position", or DC blocker bypass, by just moving a 0.1" shorting plug. Takes near zero PCB space and near zero cost, for great flexibility in operation.

[Porfido]

Originally Posted by AndrewT

The B1 is an AC coupled source and with that you can safely bypass the DC blocking cap in the Symasym.

My case!
Thanks, Andrew!

[zsgh119]

x2-Symasym5-3 AMP

[drowranger]

got this from M.Bittner site. same version with last thread why so many to92?

regards,
joel

[44250]

Originally Posted by drowranger

got this from M.Bittner site. same version with last thread why so many to92?

regards,
joel

I´d say nine,just as it should be....

[drowranger]

may be my eyes are just tired

regards,
joel

[44250]

Originally Posted by drowranger

may be my eyes are just tired

regards,
joel

It could be an optical illusion,the way that they are spreaded on a pcb. I thougt the same thing before i counted them one by one. I have done SymAsym 5.3 and first thing i have noticed that is different on your pcb than on my is two diodes between E and C of output transistors. MURS120 exists on your pcb and on my they are not provided. It works anyway!

[farhun]

Originally Posted by drowranger

got this from M.Bittner site. same version with last thread why so many to92?

regards,
joel

I couldn't locate where that pcb is from. Can someone direct me to the site where the pcb above sold? Thanks.