SYMEF amplifier

[OnAudio]

Yes am giving away 50 free PCBs right away , check them out here 50 Free SYMEF PCBs

[OnAudio]

Thank you for all of you who have joined this adventure . Share with us your build progress and pictures. .

Once finished provide your reviews as SYMEF gently whispers those first notes and probably sweeps your heart away

Then let us know, in your own ears...what you think

[billyk]

Alrighty then...
Could not find BOM for the new PCB that just arrived. They say type 2 on them and although there is a section for them on the website, there is nothing in the BOM part. I took the BOM from the Type 1 section and converted it to the Type 2 board. All of the part numbers now match the part numbers as listed on the PCB.
So, are the parts the same for both BOMs if their values match? There are two parts missing, C8 a 220uf that looks to be electrolytic and R32 a 7.5, I would assume R. Would someone care to specify those parts? If all this is correct I would be happy to share.

[OnAudio]

Originally Posted by billyk

Alrighty then...
Could not find BOM for the new PCB that just arrived. They say type 2 on them and although there is a section for them on the website, there is nothing in the BOM part. I took the BOM from the Type 1 section and converted it to the Type 2 board. All of the part numbers now match the part numbers as listed on the PCB.
So, are the parts the same for both BOMs if their values match? There are two parts missing, C8 a 220uf that looks to be electrolytic and R32 a 7.5, I would assume R. Would someone care to specify those parts? If all this is correct I would be happy to share.

Kindly share , your assumptions so far seem spot on

[billyk]

OK C8 and R32 still need to be speced out.
I added current prices from Mouser and DigiKey. Also have the BOM as specified saved at both if anyone wants them...
Also can email SS as they don't allow XLS attachments.

[OnAudio]

Thanks Billy. Will go through it. Note the ground isolation resistor can be a jumper or a 7.5 ohm resistor. C8 on type2 is really C1 on type1

[Maros]

I got my PCB's! :-)
They are really nice!
Would it be problematic if I'd use a 44VAC transformer (so around 60VDC) in the power supply?

[billyk]

Parts for the PCBs are on order. Unfortunately the diodes (D5,6) and one of the outputs (Q4) are on back order until late Feb. Need to get the PSU stuff together now. Not real clear on just what I am going to do here tho...

[OnAudio]

Originally Posted by Maros

I got my PCB's! :-)
They are really nice!
Would it be problematic if I'd use a 44VAC transformer (so around 60VDC) in the power supply?

Thank you. +/- 60 VDC is too high, safely +/- 40 VDC , max +/- 50 VDC

[OnAudio]

Originally Posted by billyk

Parts for the PCBs are on order. Unfortunately the diodes (D5,6) and one of the outputs (Q4) are on back order until late Feb. Need to get the PSU stuff together now. Not real clear on just what I am going to do here tho...

Nice going Billy, you can try two PSU s
1. The one on the site
2. Power Supply Resevoir Size (Thats if you like to experiment )