• The Vendor's Bazaar forum is for commercial offers and transactions. Only unmoderated members can post here.

    diyAudio provides this forum for the convenience of our members, but makes no warranty nor assumes any responsibility. We do not vet any members. Use of this facility is at your own risk. Customers can post any issues in those threads as long as it is done in a civil manner. All diyAudio rules about conduct apply and will be enforced.

VSSA Lateral MosFet Amplifier

Jump to Latest
#2,004
Hi.
1 stereo set for me, please.

BYRTT 8 PCB set
CaféNoir 6 PCB set
ColinAlex 8 PCB set
DavorXXL 6 PCB set
DuffyDawg 4 PCB set + 4 SMPS400
electromf 4 PCB set
badrisuper 2 PCB set
volavola 2 PCB set
JethroTull 2 PCB set

Many thanks,
Francisco
 
Last edited:
#2,006
Hi
I am interested in 2 pcb set please.
thanks

BYRTT 8 PCB set
CaféNoir 6 PCB set
ColinAlex 8 PCB set
DavorXXL 6 PCB set
DuffyDawg 4 PCB set + 4 SMPS400
electromf 4 PCB set
badrisuper 2 PCB set
volavola 2 PCB set
JethroTull 2 PCB set
kp93300 2 PCB set

regards
kp93300
 
#2,009
BYRTT 8 PCB set
CaféNoir 6 PCB set
ColinAlex 8 PCB set
DavorXXL 6 PCB set
DuffyDawg 4 PCB set + 4 SMPS400
electromf 4 PCB set
badrisuper 2 PCB set
volavola 2 PCB set
JethroTull 2 PCB set
kp93300 2 PCB set
momomo67890 4 pcb set
ua3grn 4pcb set
mj777 2pcb set

regards,
marjohn
 
#2,010
BYRTT 8 PCB set
CaféNoir 6 PCB set
ColinAlex 8 PCB set
DavorXXL 6 PCB set
DuffyDawg 4 PCB set + 4 SMPS400
electromf 4 PCB set
badrisuper 2 PCB set
volavola 2 PCB set
JethroTull 2 PCB set
kp93300 2 PCB set
momomo67890 4 pcb set
ua3grn 4pcb set
mj777 2pcb set
mkusan 2pcb set

Thank you
Marko
 
#2,011
Hi LC,

I passed these two day with VSSA every time i could, to play one CD behind an another. The Magic is still here with VSSA....The little things boring me is that qith my +/-35Vdc psu the power deliver seems to be little to the downside with my speaker...So the could be to build new speaker with greater sensitivity or if there is any chance to convert VSSA 1.4 to +/-50Vdc (Rcore i have in stock) with for sure swap BC550-560 to 2sc2240bl-2sa970bl, but have no idea to what would other changes need. In my mind Alf16NP would late place to Ald double die...

Marc
 
#2,012
Hi Marc

You can go to +/-45 V PSU at any time without modifications. Extra +/-10 V headroom will bring that needed power to your nice speakers. :yes:

For a safe +/-50 V operationality you would need to replace BC-s with 60 V low noise BJTs (same pinout) and replace R7, R8 with 10 k, 1206 resistors. 😉

Sound of six transistors only is revealing and their musical presentation is very involving, magic will not dissapear, no worries. :cloud9:
 
#2,013
Lazy Cat said:
Hi Marc

You can go to +/-45 V PSU at any time without modifications. Extra +/-10 V headroom will bring that needed power to your nice speakers. :yes:

For a safe +/-50 V operationality you would need to replace BC-s with 60 V low noise BJTs (same pinout) and replace R7, R8 with 10 k, 1206 resistors. 😉

Sound of six transistors only is revealing and their musical presentation is very involving, magic will not dissapear, no worries. :cloud9:
Click to expand...

Pin out won't be in issue as the idea is to convert my alf16NP 1.4 layout to a Alf16N16/alf16P16 layout. If BC546/556 are used no issue with use of B grade since C grade are totally obsolet?

Concern R7 and R8 : there is only value on 1.4 schematic no parts numerotation.

Marc
 
Last edited:
#2,015
BYRTT 8 PCB set
CaféNoir 6 PCB set
ColinAlex 8 PCB set
DavorXXL 6 PCB set
DuffyDawg 4 PCB set + 4 SMPS400
electromf 4 PCB set
badrisuper 2 PCB set
volavola 2 PCB set
JethroTull 2 PCB set
kp93300 2 PCB set
momomo67890 4 pcb set
ua3grn 6pcb set
mj777 2pcb set
mkusan 2pcb set
 
#2,019
Siberia said:
Do recommended caps and inrush limiter changes on SMPS modules apply both the same for hypex and connex modules? Felt comfortable with +-35V rails, wonder if I would benefit raising them. Hypex has +-46V while Connex +-45V.
Click to expand...

Siberia, to go for +-45V, you need to change the resistors at R19, R20 as recommended by LC. For my set, I am using connex SMPS500R +-45V. It has been running fine on my VSSA since last Thursday. I only changed the output cap from teapo LH 63V 4700uf to panasonic 71V 6800uf. The rest was remained the same as provided.

As for inrush, it is controlled by NTC. I find that soft start period is OK for me so I didn't touch on it. If you want to install external soft start, just short the NTC.

HYPEX is official recommended power supply and has more features on it. You can refer to post 1091 for the recommended caps and SQ reviewed by LC. 😀


James🙂
 
You must log in or register to reply here.
Top Bottom