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Simpelstark+ ODNF amplifier boards GB
Simpelstark+ ODNF amplifier boards GB
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Old 10th September 2019, 03:59 AM   #101
gaborbela is offline gaborbela  Canada
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Join Date: Sep 2005
Hi Valery

Interested on a pair PCB, shipping to Toronto Canada.
Thank you

Greetings gabor
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Old 10th September 2019, 04:05 AM   #102
pinnocchio is offline pinnocchio  Canada
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Location: Montreal
Hi Jeff,

What has changed from the original design?

Thanks
Do
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Old 10th September 2019, 07:45 AM   #103
vzaichenko is offline vzaichenko  Russian Federation
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Simpelstark+ ODNF amplifier boards GB
Quote:
Originally Posted by gaborbela View Post
Hi Valery

Interested on a pair PCB, shipping to Toronto Canada.
Thank you

Greetings gabor
Hi Gabor,

Can you please place the order via our web-store, using the discount code DIYAUDIO. It will be shipped from New Hamburg as usual ))

Cheers,
Valery
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Old 10th September 2019, 09:34 AM   #104
jwilhelm is offline jwilhelm  Canada
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Location: New Hamburg, Ontario
Simpelstark had an odd size pattern for it's small caps so I changed it to .200" centers. The balanced adapter is new and Amp Control V6.22 has a new voltage loss detection circuit.
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Old 12th September 2019, 07:39 PM   #105
jwilhelm is offline jwilhelm  Canada
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Location: New Hamburg, Ontario
Default Board Update

I've managed to test most of the boards. Simpelstark and the supplies are good. There's a bug in the Amp Control boards, I'll have replacements early next week. I haven't managed to test the new input adapter board yet, I hope to do that in the morning. I should be able to start shipping out some of the orders tomorrow.
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Old 14th September 2019, 07:42 PM   #106
vzaichenko is offline vzaichenko  Russian Federation
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Simpelstark+ ODNF amplifier boards GB
Hello All,

I have slightly updated the build guide for Simpelstark+ in the store for making the ODNF setup more clear. The attached picture illustrates what kind of signals you are going to see at the output of the amplifier and at TP2 test point.
ODNF circuit is balanced as soon as the amplitude of the error signal at TP2 is at its minimum (trimmed by R26).

The signal generator can be very simple - Android application like this is enough (1KHz sine wave is enough for the above procedure):
Frequency Generator - Tone Generator - Apps on Google Play

Cheers,
Valery
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File Type: jpg ODNF 1KHz 01.jpg (196.8 KB, 210 views)
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Last edited by vzaichenko; 14th September 2019 at 07:44 PM.
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Old 16th September 2019, 07:23 AM   #107
TerraMonkey is offline TerraMonkey  United Kingdom
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Location: Huntingdon
Quote:
Originally Posted by jwilhelm View Post
I've managed to test most of the boards. Simpelstark and the supplies are good. There's a bug in the Amp Control boards, I'll have replacements early next week. I haven't managed to test the new input adapter board yet, I hope to do that in the morning. I should be able to start shipping out some of the orders tomorrow.
Cool Beans!
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Old 18th September 2019, 06:29 PM   #108
pinnocchio is offline pinnocchio  Canada
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Got my boards yesterday! Beauties!

Thanks Jeff and Valery for this GB!
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Old 19th September 2019, 10:02 PM   #109
jwilhelm is offline jwilhelm  Canada
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Amp Control 6V2.3 is up and running perfectly. It has an extra 12V switched connector on it that will work nicely to switch the new input adapter boards. I'm going to update the software so a rear panel switch can be connected to one of the pins on the ISP port, the control board will check the switch position on power up and set the input adapter to the correct input before powering up the amplifier.

Debugged input adapter boards should be arriving tomorrow so with any luck I should be able to package everything over the weekend and ship everything out.
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Old 20th September 2019, 10:16 PM   #110
jwilhelm is offline jwilhelm  Canada
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The new input adapter board is working perfectly. TD looks like a loop-back test on my distortion analyzer! I'll try to package everyone's orders this weekend and get them in the mail on Monday.
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