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PostPosted: 22 Apr 2020, 23:16 
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Joined: 06 Jun 2008, 18:23
Posts: 5243
Location: Australia
More later but just finished this SRPP preamp designed by Bruce. Made one before and thought them excellent. This has better tubes - Gold Lion E88CCs. Russian PIO caps on the output.

Colour is Deep Indian Red epoxy.
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Projects:"Rosso" - E88CC SRPP preamp | "Pass F5 trubo” - dual mono high-end amp | “MWH” - 1920s UX-171A preamp | ”Image” - Low Profile 100W Class D amp |


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PostPosted: 23 Apr 2020, 20:48 
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Joined: 04 Jun 2008, 20:59
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Location: Arizona, USA
Hi Mark, Nice build. Love the color. How does it sound?

Good listening
Bruce

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PostPosted: 23 Apr 2020, 20:54 
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gofar99 wrote:
Hi Mark, Nice build. Love the color. How does it sound?

Good listening
Bruce

Had to listen on HPs as the wife is home but all sounds good. Appears dead quiet. Today I’ll have it in my main rig and do a better listening.

This is the second of your SRPPs I’ve built the other was good too. The better tubes here may improve sound.

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Projects:"Rosso" - E88CC SRPP preamp | "Pass F5 trubo” - dual mono high-end amp | “MWH” - 1920s UX-171A preamp | ”Image” - Low Profile 100W Class D amp |


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PostPosted: 24 Apr 2020, 00:47 
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Pleased with the sound but needs 50 hours to burn in. just one more image. Called the preamp "Continuum"

http://retro-thermionic.blogspot.com/20 ... reamp.html


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Projects:"Rosso" - E88CC SRPP preamp | "Pass F5 trubo” - dual mono high-end amp | “MWH” - 1920s UX-171A preamp | ”Image” - Low Profile 100W Class D amp |


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PostPosted: 24 Apr 2020, 21:05 
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Projects:"Rosso" - E88CC SRPP preamp | "Pass F5 trubo” - dual mono high-end amp | “MWH” - 1920s UX-171A preamp | ”Image” - Low Profile 100W Class D amp |


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PostPosted: 11 Jun 2020, 20:41 
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About to make another of Bruce’s SRPP preamps. He has provided a few new values to better suite this tube. I have all the parts now waiting for the chassis to dry. Tubes a Gold Lion E88CC Gold pins. All the parts I had in de lab only required the chassis.

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0601598D-F6FA-4341-863A-7CF1A015B10B.jpeg


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Projects:"Rosso" - E88CC SRPP preamp | "Pass F5 trubo” - dual mono high-end amp | “MWH” - 1920s UX-171A preamp | ”Image” - Low Profile 100W Class D amp |


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PostPosted: 16 Jun 2020, 00:51 
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It lives. Got all done in 5.5 hours - all wiring and filament and HT balance. Played first on.

ive been pleased with the Gold Lion E88CC tubes in a previous build. This one has been re-design and tweaked by Bruce of American oddwatt fame. All different passive values. Beautiful crisp treble and solid bass. The treble is the standout.

I called it “Rosso”.
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Projects:"Rosso" - E88CC SRPP preamp | "Pass F5 trubo” - dual mono high-end amp | “MWH” - 1920s UX-171A preamp | ”Image” - Low Profile 100W Class D amp |


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PostPosted: 18 Jun 2020, 18:13 
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Sounding very good and just run in.

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Projects:"Rosso" - E88CC SRPP preamp | "Pass F5 trubo” - dual mono high-end amp | “MWH” - 1920s UX-171A preamp | ”Image” - Low Profile 100W Class D amp |


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