Krell KSA 100mkII Clone - Page 91

steenoe · 16th November 2006, 06:21 AM

Quote:

You got the first payment !!!

And the second

Thanks for doing it, Mark.

Steen

PWatts · 16th November 2006, 06:43 AM

Well with the O/S not on the PCB itself leaving it out is simple enough. Maybe on a next version there can be a more elegant way of doing it though.

About the DC-coupling of the feedback loop for purists preferring not to have capacitors in the signal path, there is provision for a jumper on the PCB, so briefly shorting it out is a breeze.

I've SPICE'd the circuit; in fact I've SPICE'd the KSA50, KSA100 Mk1 and some of its variants too to investigate the influence of different components and check how they compare to the math. I'm very busy lately but will try to experiment with DC servo's when I have the chance.

pinkmouse · 16th November 2006, 07:59 AM

Quote:

Originally posted by Mark A. Gulbrandsen
What difference did you hear?

I wasn't actually doing critical listening, just had some background music playing whilst checking heatsink temps, but I didn't notice a difference between the channel with feedback connected and the disconected one.

jacco vermeulen · 16th November 2006, 09:02 AM

Mark,
add another succesfull paypal transfer to the list.

Pierre,
the additional features of the boards are highly appreciated, could be the first GB boards i'm not mutulating.

valvemaniac · 16th November 2006, 10:12 AM

Hi Mark,

Payment sent for my 4 boards.

Thanks for all your hard work.

Cheers,

Steve

barryblue · 16th November 2006, 03:03 PM

Hi Mark,

Payment sent for 5 boards.

Thank you and everyone who has made this project happen.

Cheers

loek · 16th November 2006, 03:57 PM

Hi Mark, i mailed dr.Strangelove3 to arrange the payment for his pcbs, so we can save on shippng.
Jacco was, as usual, very fast and paid allready; but maybe it is not to late to share the Dutch shipping parcel?
Greetings, Loek

twitchie · 16th November 2006, 05:06 PM

Hi Mark, payment sent for 4 boards, and thanks for all the work in making this possible.

If possible, could I please get 2 with the solder mask and 2 without?

Regards,

Stephen

jacco vermeulen · 16th November 2006, 05:48 PM

Quote:

fast

Sorry dude,

i had this picture in my skull of Mark sitting on a pile of boards while he was eating a bunch of checks.
The swift response is like a seditive.

grimberg · 16th November 2006, 05:50 PM

Mark,

Thank you so much for organizing yet another group buy. I have just sent you the payment for my 4 boards.

16th November 2006, 09:02 AM	#904
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	Mark, add another succesfull paypal transfer to the list. Pierre, the additional features of the boards are highly appreciated, could be the first GB boards i'm not mutulating. __________________ Looks like Sponge Bob has killed another thread.

16th November 2006, 03:03 PM	#906
barryblue diyAudio Member Join Date: Jun 2004 Location: uk	Payment Hi Mark, Payment sent for 5 boards. Thank you and everyone who has made this project happen. Cheers

16th November 2006, 03:57 PM	#907
loek diyAudio Member Join Date: Feb 2005 Location: The Hague	paypal Hi Mark, i mailed dr.Strangelove3 to arrange the payment for his pcbs, so we can save on shippng. Jacco was, as usual, very fast and paid allready; but maybe it is not to late to share the Dutch shipping parcel? Greetings, Loek

16th November 2006, 05:50 PM	#910
grimberg diyAudio Member Join Date: Oct 2002 Location: California, USA	Me too! Mark, Thank you so much for organizing yet another group buy. I have just sent you the payment for my 4 boards.

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16th November 2006, 06:43 AM	#902
PWatts diyAudio Member Join Date: Jun 2003 Location: Bloubergstrand	Well with the O/S not on the PCB itself leaving it out is simple enough. Maybe on a next version there can be a more elegant way of doing it though. About the DC-coupling of the feedback loop for purists preferring not to have capacitors in the signal path, there is provision for a jumper on the PCB, so briefly shorting it out is a breeze. I've SPICE'd the circuit; in fact I've SPICE'd the KSA50, KSA100 Mk1 and some of its variants too to investigate the influence of different components and check how they compare to the math. I'm very busy lately but will try to experiment with DC servo's when I have the chance.

16th November 2006, 10:12 AM	#905
valvemaniac diyAudio Member Join Date: Jun 2005 Location: Auckland	Hi Mark, Payment sent for my 4 boards. Thanks for all your hard work. Cheers, Steve

16th November 2006, 05:06 PM	#908
twitchie diyAudio Member Join Date: Jul 2004 Location: Toronto, Canada	Hi Mark, payment sent for 4 boards, and thanks for all the work in making this possible. If possible, could I please get 2 with the solder mask and 2 without? Regards, Stephen

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