diyAudio

diyAudio (https://www.diyaudio.com/forums/index.php)
-   Group Buys (https://www.diyaudio.com/forums/group-buys/)
-   -   Simpelstark+ ODNF amplifier boards GB (https://www.diyaudio.com/forums/group-buys/341363-simpelstark-odnf-amplifier-boards-gb.html)

gaborbela 10th September 2019 04:59 AM

Hi Valery

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

Greetings gabor

pinnocchio 10th September 2019 05:05 AM

Hi Jeff,

What has changed from the original design?

Thanks
Do

vzaichenko 10th September 2019 08:45 AM

Quote:

Originally Posted by gaborbela (https://www.diyaudio.com/forums/group-buys/341363-simpelstark-odnf-amplifier-boards-gb-post5910260.html#post5910260)
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

jwilhelm 10th September 2019 10:34 AM

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.

jwilhelm 12th September 2019 08:39 PM

Board Update
 
1 Attachment(s)
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.

vzaichenko 14th September 2019 08:42 PM

1 Attachment(s)
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

TerraMonkey 16th September 2019 08:23 AM

Quote:

Originally Posted by jwilhelm (https://www.diyaudio.com/forums/group-buys/341363-simpelstark-odnf-amplifier-boards-gb-post5913030.html#post5913030)
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!

pinnocchio 18th September 2019 07:29 PM

Got my boards yesterday! Beauties! :D

Thanks Jeff and Valery for this GB!

jwilhelm 19th September 2019 11:02 PM

1 Attachment(s)
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.

jwilhelm 20th September 2019 11:16 PM

1 Attachment(s)
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.


All times are GMT. The time now is 03:10 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 17.65%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio

Wiki