Juma's Head Amp

Jump to Latest
#421

Attachments

  • sch.png
    sch.png
    12.1 KB · Views: 405
Last edited:
#423
prasi said:
No, the design calls for a trafo with dual secondaries. Get one from here Toroidal Transformers, Toroidal Power Transformers, Manufacturer, Pune, India and go for 50-60VA trafo with dual secondaries.
Click to expand...

saheb11123 said:
Thank you.
..............
Click to expand...
that design uses a +ve reg and a -ve reg.
You can easily alter it (very slightly) to work with a centre tapped transformer.

just remove 4 of the rectifier diodes and add two links to 4 of the empty pads.
 
Last edited:
#424
AndrewT said:
that design uses a +ve reg and a -ve reg.
You can easily alter it (very slightly) to work with a centre tapped transformer.

just remove 4 of the rectifier diodes and add two links to 4 of the empty pads.
Click to expand...

as he doesnt have a suitable trafo, its better to go for a new dual secondary transformer. which can be converted to a center tapped easily for other builds in future if required. your post here http://www.diyaudio.com/forums/pass-labs/298369-jumas-head-amp-9.html#post4879724
 
#425
saheb11123 said:
ok so i think i have a 17-0-17 1amp traffo, that will do okay i guess?
Click to expand...

AndrewT said:
that design uses a +ve reg and a -ve reg.
You can easily alter it (very slightly) to work with a centre tapped transformer.

just remove 4 of the rectifier diodes and add two links to 4 of the empty pads.
Click to expand...

prasi said:
as he doesnt have a suitable trafo, its better to go for a new dual secondary transformer. ..................
Click to expand...
He already has a suitable transformer.
The centre tapped will work after making the small modification I gave in my previous post.
 
#427
please confirm if your pcb's are delivered either here or on email.
prasi said:
xrk- 1 set (1 PSU+1 Stereo HA)+2 buffer-shipped-delivered
gannaji- 1 set (1 PSU+1 Stereo HA)
saheb- 1 set (1 PSU+1 Stereo HA+2 buffer)
kram- 1 set (1 PSU+1 Stereo HA)-shipped
btesize-1 set (1 PSU+1 Stereo HA)-
rumina-1 set (1 PSU+1 Stereo HA)- shipped
nicusim-1 set (1 PSU+1 Stereo HA)- shipped-delivered
potepuh-1 set (1 PSU+1 Stereo HA)- shipped
e_fortier-2 PSU +1 Stereo HA+2 buffer-shipped
touchdown -1 Stereo HA-shipped
albertNL- 1 set (1 PSU+1 Stereo HA) shipped
Malvin - 1 set (1 PSU+1 Stereo HA)-shipped
 DrizztDo-1 set (1PSU+1 Stereo HA)+1 Buffer- shipped
one more member through PM-1set(1 PSU+1 Stereo HA)-shipped
one more member through PM-1set(1 PSU+1 Stereo HA)-shipped
one more member through PM-1set(1 PSU+1 Stereo HA+2buffer)-shipped
Thanks
Prasi
Click to expand...
 
Last edited:
#431
Originally Posted by prasi View Post
xrk- 1 set (1 PSU+1 Stereo HA)+2 buffer-shipped-delivered
gannaji- 1 set (1 PSU+1 Stereo HA)-delivered
saheb- 1 set (1 PSU+1 Stereo HA+2 buffer)
kram- 1 set (1 PSU+1 Stereo HA)-shipped
btesize-1 set (1 PSU+1 Stereo HA)-
rumina-1 set (1 PSU+1 Stereo HA)- shipped-delivered
nicusim-1 set (1 PSU+1 Stereo HA)- shipped-delivered
potepuh-1 set (1 PSU+1 Stereo HA)- shipped
e_fortier-2 PSU +1 Stereo HA+2 buffer-shipped
touchdown -1 Stereo HA-shipped
albertNL- 1 set (1 PSU+1 Stereo HA) shipped
Malvin - 1 set (1 PSU+1 Stereo HA)-shipped
DrizztDo-1 set (1PSU+1 Stereo HA)+1 Buffer- shipped
one more member through PM-1set(1 PSU+1 Stereo HA)-shipped
one more member through PM-1set(1 PSU+1 Stereo HA)-shipped
one more member through PM-1set(1 PSU+1 Stereo HA+2buffer)-shipped
Thanks
Prasi
 
#432
prasi said:
Originally Posted by prasi View Post
xrk- 1 set (1 PSU+1 Stereo HA)+2 buffer-shipped-delivered
gannaji- 1 set (1 PSU+1 Stereo HA)-delivered
saheb- 1 set (1 PSU+1 Stereo HA+2 buffer)-shipped
kram- 1 set (1 PSU+1 Stereo HA)-shipped
btesize-1 set (1 PSU+1 Stereo HA)-Cancelled
rumina-1 set (1 PSU+1 Stereo HA)- shipped-delivered
nicusim-1 set (1 PSU+1 Stereo HA)- shipped-delivered
potepuh-1 set (1 PSU+1 Stereo HA)- shipped
e_fortier-2 PSU +1 Stereo HA+2 buffer-shipped
touchdown -1 Stereo HA-shipped
albertNL- 1 set (1 PSU+1 Stereo HA) shipped
Malvin - 1 set (1 PSU+1 Stereo HA)-shipped
DrizztDo-1 set (1PSU+1 Stereo HA)+1 Buffer- shipped
one more member through PM-1set(1 PSU+1 Stereo HA)-shipped
one more member through PM-1set(1 PSU+1 Stereo HA)-shipped
one more member through PM-1set(1 PSU+1 Stereo HA+2buffer)-shipped
Thanks
Prasi
Click to expand...
I have 2 spare sets remaining, time to grab
 
#435
All gone, this concludes the GB, now onto building...

xrk- 1 set (1 PSU+1 Stereo HA)+2 buffer-shipped-delivered
gannaji- 1 set (1 PSU+1 Stereo HA)-delivered
saheb- 1 set (1 PSU+1 Stereo HA+2 buffer)-shipped
kram- 1 set (1 PSU+1 Stereo HA)-shipped
rumina-1 set (1 PSU+1 Stereo HA)- shipped-delivered
nicusim-1 set (1 PSU+1 Stereo HA)- shipped-delivered
potepuh-1 set (1 PSU+1 Stereo HA)- shipped
e_fortier-2 PSU +1 Stereo HA+2 buffer-shipped
touchdown -1 Stereo HA-shipped
albertNL- 1 set (1 PSU+1 Stereo HA) shipped
Malvin - 1 set (1 PSU+1 Stereo HA)-shipped
DrizztDo-1 set (1PSU+1 Stereo HA)+1 Buffer- shipped
one more member through PM-1set(1 PSU+1 Stereo HA)-shipped
one more member through PM-1set(1 PSU+1 Stereo HA)-shipped
one more member through PM-1set(1 PSU+1 Stereo HA+2buffer)-shipped
one more member through PM-1set(1 PSU+1 Stereo HA)-shipped
thimios -1 set (1 PSU+1Stereo HA)-shipped
nicusim-1 more set (1 PSU+1HA)-shipped
chat72- 1 set (1 PSU+1HA)-shipped
Thanks
Prasi
 
Last edited:
#440
thanks all for you confirmation...
prasi said:
xrk- 1 set (1 PSU+1 Stereo HA)+2 buffer-shipped-delivered
gannaji- 1 set (1 PSU+1 Stereo HA)-delivered
saheb- 1 set (1 PSU+1 Stereo HA+2 buffer)-shipped
kram- 1 set (1 PSU+1 Stereo HA)-shipped
rumina-1 set (1 PSU+1 Stereo HA)- shipped-delivered
nicusim-1 set (1 PSU+1 Stereo HA)- shipped-delivered
potepuh-1 set (1 PSU+1 Stereo HA)- shipped
e_fortier-2 PSU +1 Stereo HA+2 buffer-shipped
touchdown -1 Stereo HA-shipped
albertNL- 1 set (1 PSU+1 Stereo HA) shipped-delivered
Malvin - 1 set (1 PSU+1 Stereo HA)-shipped
DrizztDo-1 set (1PSU+1 Stereo HA)+1 Buffer- shipped-delivered
one more member through PM-1set(1 PSU+1 Stereo HA)-shipped
one more member through PM-1set(1 PSU+1 Stereo HA)-shipped
one more member through PM-1set(1 PSU+1 Stereo HA+2buffer)-shipped -delivered
one more member through PM-1set(1 PSU+1 Stereo HA)-shipped
thimios -1 set (1 PSU+1Stereo HA)-shipped
nicusim-1 more set (1 PSU+1HA)-shipped
chat72- 1 set (1 PSU+1HA)-shipped
Thanks
Prasi
Click to expand...
 
You must log in or register to reply here.
Top Bottom