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Simpelstark+ ODNF amplifier boards GB
Simpelstark+ ODNF amplifier boards GB
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Old 24th August 2019, 03:54 AM   #41
arthur is offline arthur
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Join Date: Oct 2001
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Simpelstark+ ODNF amplifier boards GB
Hi Please count me
tuyen - 1x (1) + jfets
pinnocchio - 1x (1) + jfets
yogiDIYbear - 1x (1) + jfets
manniraj - 1x (1) + jfets
outtek - 1x (3) + 2 x jfets
cl00sed – 2x (1) + 2 x jfets
PurpleTube – 1x (3)
Touchdown - 1x (1) + jfets
twocents – 1x (2) + jfets
Janku - 1x(1)
Arthur- 2x(3) + 2X jfets
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Old 24th August 2019, 05:12 AM   #42
markus22ch is offline markus22ch  Switzerland
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Join Date: Aug 2007
Simpelstark+ ODNF amplifier boards GB
1 set for me please!

tuyen - 1x (1) + jfets
pinnocchio - 1x (1) + jfets
yogiDIYbear - 1x (1) + jfets
manniraj - 1x (1) + jfets
outtek - 1x (3) + 2 x jfets
cl00sed – 2x (1) + 2 x jfets
PurpleTube – 1x (3)
Touchdown - 1x (1) + jfets
twocents – 1x (2) + jfets
Janku - 1x(1)
Arthur- 2x(3) + 2X jfets
markus22ch 1x(3) + jfets

Thanks!
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Old 25th August 2019, 08:35 AM   #43
vzaichenko is offline vzaichenko  Russian Federation
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Join Date: Jan 2010
Location: Moscow, Russia
Simpelstark+ ODNF amplifier boards GB
OK, we open the ordering in 1 week from now - on September 1.
Instructions will follow soon.
We have reserved 15 sets of jfets (2 pairs each) for GB participants.

I have also added the "Balanced Input board (XLR/RCA)" to the GB for those of you who may be interested in having the XLR input option. This is the pro-grade balanced receiver. XLR/RCA inputs can be switched electronically (i2c interface) or the "dumb" way - with mechanical switch mounted on the board.
Schematic is available on the "Building guides" page in DOWNLOADS area (you have to be logged in).
The GB price is $14.93

Cheers,
Valery
Attached Images
File Type: jpg 03 Balanced_input_board_silk.jpg (173.3 KB, 165 views)
File Type: png 01 Balanced_input_board_front.png (559.9 KB, 163 views)
File Type: png 02 Balanced_input_board_rear.png (622.1 KB, 164 views)
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Last edited by vzaichenko; 25th August 2019 at 08:44 AM.
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Old 25th August 2019, 02:20 PM   #44
Vunce is offline Vunce  United States
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Join Date: Jan 2014
Location: LI, NY
Simpelstark+ ODNF amplifier boards GB
tuyen - 1x (1) + jfets
pinnocchio - 1x (1) + jfets
yogiDIYbear - 1x (1) + jfets
manniraj - 1x (1) + jfets
outtek - 1x (3) + 2 x jfets
cl00sed 2x (1) + 2 x jfets
PurpleTube 1x (3)
Touchdown - 1x (1) + jfets
twocents 1x (2) + jfets
Janku - 1x(1)
Arthur- 2x(3) + 2X jfets
markus22ch 1x(3) + jfets
Vunce - 1x (1) + jfets
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Old 28th August 2019, 01:29 PM   #45
pinnocchio is offline pinnocchio  Canada
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Join Date: Sep 2010
Location: Montreal
Hi Jeff, Valery,

Am I pushing my luck asking if we could buy the output inductors already made by you? I can make inductors, not a problem but I just hate doing so. I wouldn't mind paying for a set!

Do
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Old 28th August 2019, 01:53 PM   #46
xrk971 is online now xrk971  United States
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Location: Metro DC area
Simpelstark+ ODNF amplifier boards GB
Maybe we should start specifying COTS high current inductors like Coilcraft SER series.

Coilcraft SER2900 Surface Mount Power Inductors

Typically $6 ea and handles huge currents.
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Old 28th August 2019, 02:02 PM   #47
pinnocchio is offline pinnocchio  Canada
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Location: Montreal
Yeah, those coilcraft are very nice indeed!
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PREAMPs : AMB α10 + USSPA | LDR3x + USSPA | AMPs: AMB β24 | USSA5 | TGM8 | VZ Audio NS OPS | FC-100 | Modulus-686 |
DACs : Mirand AK4490 + Discrete Output | Speakers : Troels Gravesen ATS-4 | Sagwee LT V3 |
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Old 28th August 2019, 02:10 PM   #48
Vunce is offline Vunce  United States
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Join Date: Jan 2014
Location: LI, NY
Simpelstark+ ODNF amplifier boards GB
Maybe I can finally toss out my custom coil former...
A #2 pencil
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Old 28th August 2019, 02:14 PM   #49
jwilhelm is offline jwilhelm  Canada
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Join Date: Jun 2014
Location: New Hamburg, Ontario
You just need a good coil form. I think this took all of 10 minutes to make. I'll send you some inductors Do.
Attached Images
File Type: jpg Coil Form.jpg (236.0 KB, 120 views)
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Old 28th August 2019, 02:53 PM   #50
xrk971 is online now xrk971  United States
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Join Date: Oct 2012
Location: Metro DC area
Simpelstark+ ODNF amplifier boards GB
I usually use AA battery - the 18ga magnet wire is a lot easier to bend than 16ga. For skinny coils I use a 1/4in drill bit. But agree they are a pain to make. I use a lighter flame to burn off the varnish on the ends and clean up with sand paper. But would gladly pay $6 for a part on Mouser and solder it in.

Luckily, Class A amps don’t need this part. So I haven’t had to make one for a while ever since making Alpha amps.
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Last edited by xrk971; 28th August 2019 at 02:56 PM.
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