PeeCeeBee V4H GB

[kpsthakur]

Hi Shaan, from testing my KSE transistors, the entire N-P-N lot of 20 transistor is HFE value ~88 & the P-N-P lot of 20 transistors is HFE value 179...not sure if they are fit for Q9,Q10 as they are expected to be matched...can try BD series here?

 

[kpsthakur]

found perfect matches in BD series - BD139/BD140 - 2 pairs (HFE 132, 134)

 

[kpsthakur]

Sorry may have missed somewhere, but from the schematic the R27-28 & R29-R30 pairs don't seem to be in sync...the rest of the schematic is perfectly symmetrical...hope this is by design...

R27 - 330R
R28 - 220R

R29 - 330R
R30 - 220R

please confirm

 

[Nisbeth]

Shaan, are there any parts changes you would recommend if the supply voltage is dropped to +/-48V (35VAC transformer)?

 

[shaan]

Hi Shaan, from testing my KSE transistors, the entire N-P-N lot of 20 transistor is HFE value ~88 & the P-N-P lot of 20 transistors is HFE value 179...not sure if they are fit for Q9,Q10 as they are expected to be matched...can try BD series here?

found perfect matches in BD series - BD139/BD140 - 2 pairs (HFE 132, 134)

Sorry may have missed somewhere, but from the schematic the R27-28 & R29-R30 pairs don't seem to be in sync...the rest of the schematic is perfectly symmetrical...hope this is by design...

R27 - 330R
R28 - 220R

R29 - 330R
R30 - 220R

please confirm

It's by design so no worries.

 

[shaan]

Shaan, are there any parts changes you would recommend if the supply voltage is dropped to +/-48V (35VAC transformer)?

No changes necessary.

 

[shaan]

Google drive download link for V4H setup guide shared in first post.

Here is the link for quick access: PeeCeeBee V4H Setup Guide

Thanks everyone for your patience.

 

[Medisinmannen]

Sorry to hear about trouble with shipping, but no worries, I have plenty of time.

I found a transformer for cheap with 4x42v, but im uncertain of the grounding layout. I've attached a sketch, but uncertain if the RCA will cause a ground loop. Any suggestions?

I was too late for the PSU, so im using diyaudios protection boards. Had some fun learning autocad and drew my build. Dissipante 3U 300mm. Looking forward to actually build it

 

[CitizenKane]

Google drive download link for V4H setup guide shared in first post.

Here is the link for quick access: PeeCeeBee V4H Setup Guide

Thanks everyone for your patience.

Google Drive says there is no file ...

 

[shaan]

Check first post.

edit: Here it is V4H Setup Guide

 

[shaan]

Sorry to hear about trouble with shipping, but no worries, I have plenty of time.

Packets moving now.

I found a transformer for cheap with 4x42v, but im uncertain of the grounding layout. I've attached a sketch, but uncertain if the RCA will cause a ground loop. Any suggestions?

I was too late for the PSU, so im using diyaudios protection boards. Had some fun learning autocad and drew my build. Dissipante 3U 300mm. Looking forward to actually build it

I always suggest a star ground created as far as possible from the transformer. Every ground connection except speaker return connected to star, speaker return connected to capacitor bank 0V.

It is hard to tell as it depends on many factor. Best to try your config and see.

 

[supernet]

Receive the boards...thx

 

[shaan]

 

[mj777]

received my boards today. thanks Shaan

br,
mj777

 

[jacques antoine]

The boards just got delivered. Many thanks Shaan.

Jacques

 

[shaan]

Relieved to hear that. You have waited too long. I hope the other delayed packets also reach their destination soon.

 

[shaan]

The good stuff has started pouring in once again.

 

[asuslover]

Got my package too!
Thanks Shaan!

 

[fencki]

hi.
my boards have arrived safely.
thx.

regards
slavko

 

[shaan]