Foreplay 3 b+ voltage question

balancedtriode · 2095

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Offline balancedtriode

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on: August 02, 2012, 06:58:06 PM
I am wondering how High a Voltage the B+ voltage was in the preamp my friend has one and I kinda have a modding Idea
any info would be appreciated
thanks,
coltrane
« Last Edit: August 03, 2012, 04:31:45 AM by balancedtriode »

Thorens TD-160 Custom(rebuilt by me) with SME 3009 arm
Bottlehead Seduction
Extended Foreplay-III (build underway)
Stereomour Power Amp conversion (Heavily Modded)
Klipsch Cornwalls' with Vertical Horns

Offline Paul Birkeland

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Reply #1 on: August 06, 2012, 07:10:19 AM
The stock Foreplay III and the Extended Foreplay III use very different power supplies, so knowing which you are starting with will be helpful.

The stock Foreplay III makes right around 400v before the 0D3 regulator circuit.

The Extended Foreplay III makes about half that before the 12AU7 hybrid regulator.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline balancedtriode

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Reply #2 on: August 06, 2012, 07:23:52 AM
after the 0D3 Regulation circuit whats the b+ voltage?

Thorens TD-160 Custom(rebuilt by me) with SME 3009 arm
Bottlehead Seduction
Extended Foreplay-III (build underway)
Stereomour Power Amp conversion (Heavily Modded)
Klipsch Cornwalls' with Vertical Horns

Offline Doc B.

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Reply #3 on: August 06, 2012, 08:20:52 AM
The 0D3 is a 150V regulator.

Dan "Doc B." Schmalle
President For Life
Bottlehead Corp.

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