Wayne's BA 2018 linestage

[wayne]

I am sending some out for 6L6 to check but I am happy with them.

 

[jazzzman]

Input sensitivity?

I have read through the entire thread, but in the event I missed something about clipping levels, I apologize in advance. I see that the gain is approximately 12db. Does anyone know at what input voltage this preamp clips?

 

[wayne]

Clips at about 3 Volts RMS input for .1% with some dependence on the rail voltage you use.

 

[jazzzman]

Thank you, Wayne, for the quick response!

 

[zman01]

Layout...

Some progress on my Wayne BA 2018 linestage build (finally!).

Any comments on the planned layout (attached)?

Power supply board is from GlassWare Audio Design (bare PCB in picture, not populated yet), transformer from Antek 2 x 18V.

Drawn the wiring using Paint.

The bottom plate is aluminium 13" x 12". I can possibly reduce the depth of the case by 3"-4", resulting in sorter input/output wires.... but that means more work.

 

[Vunce]

Some progress on my Wayne BA 2018 linestage build (finally!).......

Hi Zman,
What is your plan for volume control and source selection?

 

[zman01]

Probably something I have in my parts drawer - a 50K Alpha Taiwan pot or one of the DACT clone pots from Ebay. Did not draw the pot connection in the layout pic.

Nothing for source selection.

 

[Russellc]

Listening to it now. Sounds very nice. The cap coupling was key to getting rid of all that DC drift on this circuit.

Couple of questions please. You are talking about your boards that can go on Marks M2 version, or your Yarra (which I believe the boards are in my drawer), or are you using The boards 6L6 distributed a while ago? I m going to look through my pile of boards to make sure I got those.....I bought several boards from you!

Could you elaborate on your coupling caps used, voltage, uF, etc, and I suppose these just went on the outputs? Have meant to try something like this on my Wayne's 2018 line stage, little bit of DC until it settles, very little.

Thanks in advance,

Russellc

 

[6L6]

Zman - you need to connect the jumpers on the PSU and connect PSU ground to the PCBs

 

[zman01]

Noted 6L6, thanks for the guidance.

 

[xrk971]

Couple of questions please. You are talking about your boards that can go on Marks M2 version, or your Yarra (which I believe the boards are in my drawer), or are you using The boards 6L6 distributed a while ago? I m going to look through my pile of boards to make sure I got those.....I bought several boards from you!

Could you elaborate on your coupling caps used, voltage, uF, etc, and I suppose these just went on the outputs? Have meant to try something like this on my Wayne's 2018 line stage, little bit of DC until it settles, very little.

Thanks in advance,

Russellc

Yes, the Yarra/M2X format boards. But I am using on Yarra - more info here:
The YARRA Preamplifier/HPA for Melbourne DB Group Buy

Basically the BOM specified huge input Wima 10uF MKP input cap and the dual 4700uF 35v back to back Nichicon output caps bypassed with a 5uF 50v metallized polycarbonate cap - although any 2.2uF to 4.7uF film cap could be used here.

 

[Russellc]

Yes, the Yarra/M2X format boards. But I am using on Yarra - more info here:
The YARRA Preamplifier/HPA for Melbourne DB Group Buy

Basically the BOM specified huge input Wima 10uF MKP input cap and the dual 4700uF 35v back to back Nichicon output caps bypassed with a 5uF 50v metallized polycarbonate cap - although any 2.2uF to 4.7uF film cap could be used here.

Thanks. Going through the group buy thread, I see That I did in fact get those boards. Are the coupling caps you added in the bom or do I need to add them?

Time to assemble these boards and try them out!

PS:
Whoops, I see you state above that they are in the BOM. Thanks again!


Thanks,


Russellc

 

[Manolo47]

Any updates on boards availability in the diyaudio store?

nt

 

[6L6]

I need to test the stereo PCB, I was working on that yesterday, once proper operation has been verified, then a batch for the store will be produced and made available.

 

[Dennis Hui]

Woohoo!

 

[El Reino]

Thanks 6L6

 

[Blues]

Stereophile 2019 Award

Another feather on Wayne's and PassLabs' cap...Stereophile's Products of 2019 Amplification Component of 2019 | Stereophile.com

 

[Mark Johnson]

Congratulations Wayne!

 

[wayne]

Thanks Mark. I was surprised by getting amplification product of the year but that’s a good surprise.

 

[gary s]

Now did Stereophile get it wrong when they say 'the Nelson Pass designed" or is it a Wayne design. Maybe a collaboration between both designers perhaps - who gets the nod?