Using a "paramount" Driver board for a stereomour?

balancedtriode · 2273

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Offline balancedtriode

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on: November 12, 2012, 05:29:09 PM
hey,
I saw a old post PJ made about the possibility of a redesign of the paramount driver board for the stereomour which uses the 5670 tube. Is this still in the works?
I bet there would be some enthusiasm about such a product!
thanks any info would be appreciated
thanks,
Coltrane

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: November 12, 2012, 06:15:25 PM
Hello Coltrane,

The PC board in the Steremour is functionally nearly identical to the soft start PC board (the Soft Start board is a little more flexible).

Since the 5670 is strictly a 6.3V tube and the Steremour has a 12V heater winding, this is probably not the best choice. 

-PB

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline balancedtriode

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Reply #2 on: November 12, 2012, 10:42:50 PM
I should have looked at the schematic before posting,
sorry.

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 Joppa

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Reply #3 on: November 14, 2012, 10:41:29 AM
The useful thing the soft-start board has is an adjustable shunt-regulator chip you can use as the cathode bias for the drivers. This allows lower-gain tubes such as the 12AV7, 5965, 12AY7, 12SN7, etc. to be used - if you don't need the gain. Some of these will need an adjustment in the plate current as well for optimal operation.

Paul Joppa