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October 19, 2020, 04:47:37 PM

Author Topic: Soul Sister Question  (Read 3249 times)

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Offline xcortes

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Soul Sister Question
« on: February 25, 2014, 11:20:16 AM »
The 5670 version of the SS shows the tube at 150V plate, 9.5mA and 3.2V bias (332 ohm cathode resistor). All is good 'til I take a look at the 5670 charts that show that at 150V and 9.mA the bias is more like 1.8. What am I'm missing?
Thanks
Xavier Cortes

Offline Doc B.

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Re: Soul Sister Question
« Reply #1 on: February 25, 2014, 11:49:09 AM »
Man, that is going waaaay back. I can't begin to remember where the numbers came from. Truth be told I can't even remember what tubes I ran in mine. It's imaginable that there is an error in the plate current figure on the schemo. I can take a look after we get the archive back up.
Dan "Doc B." Schmalle
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Offline xcortes

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Re: Soul Sister Question
« Reply #2 on: February 25, 2014, 12:21:17 PM »
I know it's old. I was just studying it. No worries.

Saludos
Xavier Cortes

Offline Mike F1

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Re: Soul Sister Question
« Reply #3 on: February 26, 2014, 02:19:31 PM »
I made this preamp: http://bottlehead.com/smf/index.php/topic,2477.msg19877.html#msg19877

I wired it as shown on the schematic then later I installed LED (HLMP6000) on the cathodes but didn't change the CCS.
I'd give the nod to the LED's. To my ears it sounds very delightful!

YMMV

Mike
« Last Edit: February 26, 2014, 03:02:30 PM by Mike F1 »

Offline Doc B.

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Re: Soul Sister Question
« Reply #4 on: February 26, 2014, 02:36:18 PM »
Just want to point out that the current iteration of this concept can be seen in the Mainline.
Dan "Doc B." Schmalle
President For Life
Bottlehead Corp.

Offline oguinn

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Re: Soul Sister Question
« Reply #5 on: May 05, 2020, 12:18:53 PM »
Wait! Where did the link for sexy Kiev dot com go? There were, presumably, many single Ukrainian models who wanted to meet me
Jameson O’Guinn

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Offline Paul Birkeland

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Re: Soul Sister Question
« Reply #6 on: May 05, 2020, 03:14:05 PM »
Wait! Where did the link for sexy Kiev dot com go? There were, presumably, many single Ukrainian models who wanted to meet me
We forwarded all your personal information to them ;)
Paul "PB" Birkeland

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Offline Doc B.

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Re: Soul Sister Question
« Reply #7 on: May 06, 2020, 05:56:21 AM »
Is this what you had in mind? Kiev model 2A.
Dan "Doc B." Schmalle
President For Life
Bottlehead Corp.

Offline oguinn

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Re: Soul Sister Question
« Reply #8 on: May 06, 2020, 08:20:39 AM »
It wasn't but it is now
Jameson O’Guinn

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Main System: Schiit Bifrost MB, Schiit Sol, Eros 2, BeePre, Kaiju/Stereomour II, Jägers, Mainline

Desktop System: Crack with Speedball