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PostPosted: 23 Oct 2018, 20:09 
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Joined: 04 Jun 2008, 20:59
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Location: Arizona, USA
Hi Mark, The circuit didn't show up at this end?

Good listening
Bruce

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PostPosted: 23 Oct 2018, 21:42 
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Joined: 06 Jun 2008, 18:23
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Location: Australia
Not sure it should be listed here. It may be a comercial cct.

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Projects: "Grace" - Psvane 6SN7-SE Globe preamp | | "VoXUno" - Single driver MarkAudio 12P speaker | | "Lagoon Take 2" - Single stage tube preamp | Website: retro-thermionic


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PostPosted: 23 Oct 2018, 21:44 
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Joined: 06 Jun 2008, 18:23
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Bruce PM me your email.

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Projects: "Grace" - Psvane 6SN7-SE Globe preamp | | "VoXUno" - Single driver MarkAudio 12P speaker | | "Lagoon Take 2" - Single stage tube preamp | Website: retro-thermionic


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PostPosted: 06 Nov 2018, 01:01 
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Yet another external PS for yet another Psvane 6SN7-SE globe tube preamp. A 24VAC wall wart is use to power the PS which delivers 200V HT and 12VDC for the preamp yet to be built. The HT is choke filtered with 400uf of filtering.
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Projects: "Grace" - Psvane 6SN7-SE Globe preamp | | "VoXUno" - Single driver MarkAudio 12P speaker | | "Lagoon Take 2" - Single stage tube preamp | Website: retro-thermionic


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PostPosted: 06 Nov 2018, 01:04 
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In the next build I'm going for the even more expensive low noise Psvane 6SN7-SE globes, and premium EIZZ 24 step stepper attenuator. The rest will will be the same as Grace.

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Projects: "Grace" - Psvane 6SN7-SE Globe preamp | | "VoXUno" - Single driver MarkAudio 12P speaker | | "Lagoon Take 2" - Single stage tube preamp | Website: retro-thermionic


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PostPosted: 06 Nov 2018, 22:08 
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Joined: 28 May 2008, 21:53
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Location: Winnipeg, CANADA
Beautiful tubes with the enclosure to match. Really great looking premap Mark. Congrats.

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PostPosted: 12 Nov 2018, 20:08 
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"Elite" the new Grace. This time even more expensive grade A Psvane low noise 6SN7-SE globes. The rest is the same; Jensen copper foil PIO caps and 24step gold contact attenuator.

Big change is the chassis colour from white to black. Assembled not wired at this point.
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Projects: "Grace" - Psvane 6SN7-SE Globe preamp | | "VoXUno" - Single driver MarkAudio 12P speaker | | "Lagoon Take 2" - Single stage tube preamp | Website: retro-thermionic


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PostPosted: 13 Nov 2018, 05:48 
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Joined: 23 Feb 2017, 02:02
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:up: Must sound awesome if your making a second set of these pre amp


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PostPosted: 13 Nov 2018, 06:06 
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Not sure of it is a curse or a blessing but I always appear to make three of everything. Sometimes a lot more than three but at least three.

The scary part is I have even another in view. A friend gave me a pair of NOS RCA 5691s which I understand are ruggedised 6SL7. A small unassuming brown based tube but I believe could sound great.

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Projects: "Grace" - Psvane 6SN7-SE Globe preamp | | "VoXUno" - Single driver MarkAudio 12P speaker | | "Lagoon Take 2" - Single stage tube preamp | Website: retro-thermionic


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PostPosted: 13 Nov 2018, 17:04 
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Joined: 23 Feb 2017, 02:02
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Not sure why you want to build three pre amps while swapping the tubes on the current one will probally work same or simliar.

Maybe your refining your amps wihle you go for that little bit more sound quality so you always build three?


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