Wayne's BA 2018 linestage

[manniraj]

I searched the thread but could not find how much current will a pair of these boards consume at 18vdc power if I am providing with Salas PSU boards. I need to set the required CCS on the Salas psu to test these boards out. But I am presuming it may not be more than 100mA but correct if it isn't.

Thanks

 

[6L6]

50mA each, I think...

 

[manniraj]

50mA each, I think...

Thanks Jim, I will take it 100mA for both the boards and as Salas suggested adding another 100mA so total of 200mA for my CCS on BiB psu shunt boards.

 

[El Reino]

Can anyone sell boards for me?

 

[6L6]

There are currently none available.

Waiting for the stereo layout to be tested, then the PCB will be in the store. 😀

 

[El Reino]

OK, thanks

 

[william2001]

I searched the thread but could not find how much current will a pair of these boards consume at 18vdc power if I am providing with Salas PSU boards. I need to set the required CCS on the Salas psu to test these boards out. But I am presuming it may not be more than 100mA but correct if it isn't.

Thanks

Wayne says 25mA per channel in post #153

 

[wayne]

I am finishing these boards up and working on something for BA 2019 along with my regular work. They should be done soon.

 

[Centurion53]

Lineamp PCB

Thanks Wayne! As always you guys are awesome! and we are most grateful ! 🙂

 

[MEPER]

Is there a link to schematic with big output transistors?
There are some small changes other than just transistors?

 

[El Reino]

MEPER, Look this.

 

[MEPER]

Perfect!
Thank you!
I printed it......and I am not out of ink!

 

[6L6]

Is there a link to schematic with big output transistors?
There are some small changes other than just transistors?

R11 R12 use 1/2W resistors.

C1 change to 5pF

R23 C4 leave open

Look at the last schematic in the series of slides.

 

[MEPER]

Yes, thank you I observed that also that R11/R12 emitter resistors can be lowered to 15 ohm for higher bias? …..If I go for the larger transistors then why not let them "work hard"? …..if possible without additional heatsink...….or I could get some of the small clip-on heatsinks. I could also just stay with 27 ohm if higher bias is of no benefit such as lower distortion.

 

[chede]

Hi Meper,

no heatsinks needed with rails of +/- 18V and 15R resistors for SA1220 / SC2690 or Toshiba TTA004B / TTC004B 🙂

Regards, Claas

 

[MEPER]

Ok....I may use a little higher rails. I use -+26V on BA-3 pre and there heatsinks are necessary. I should probably do my calculations when I am that far......until now I am in the preparation/thinking phase 🙂

 

[Gooch]

There are currently none available.

Waiting for the stereo layout to be tested, then the PCB will be in the store. 😀

Will they be in the Pass Diy store or the here on DIY audio?

Thanks
Dave

 

[6L6]

diyAudio store.

 

[Adams_Leo]

I am thinking about can I use this preamp for the phono and update the riaa EQ network for the feedback or use two stage with passive RIAA EQ network.

I would like to konw what is the open loop gain for this preamp?

Any comments or suggestion will be great apprecaite.

Best Regards
Xiaojun

 

[El Reino]

Read post #791