Washplifier ........... I likeeeeeee that !!
Fugly!
can I use it as name for some upcoming amp?
Fugly!
can I use it as name for some upcoming amp?
and if you manage to insert your power plug the wrong way round you can phase compensate by wearing one of these;
Multipass?
https://c.tenor.com/4Fqo2lvwWWYAAAAC/multipass-freepass.gif
Next-looks like a capcitor/resistor-SQ-testing-device…
https://c.tenor.com/4Fqo2lvwWWYAAAAC/multipass-freepass.gif
Next-looks like a capcitor/resistor-SQ-testing-device…
status of ludef
This took way too long but here are the current boards status. It should be all downhill from here, as soon as I get the Cinemags. Got the prescribed special IRFP9140 from NJ since they are all out everywhere.
The PCB are well laid out and great quality. They come with the difficult bits pre-installed. I put the best components I could find hopefully be rewarded with amazing sound worthy of ZM & papa of course.
I m using the outboard LU boards from the group buy so that should be easy going.
I plan to swap out the M2x, put this into service and make go up against the final boss, the Vfet. 😀
This took way too long but here are the current boards status. It should be all downhill from here, as soon as I get the Cinemags. Got the prescribed special IRFP9140 from NJ since they are all out everywhere.
The PCB are well laid out and great quality. They come with the difficult bits pre-installed. I put the best components I could find hopefully be rewarded with amazing sound worthy of ZM & papa of course.
I m using the outboard LU boards from the group buy so that should be easy going.
I plan to swap out the M2x, put this into service and make go up against the final boss, the Vfet. 😀
Attachments
well, let's hope that one will do, prior to your installment
pretty much the same as in already written for Sissy and B. M25, with difference of setting LU Uds
pretty much the same as in already written for Sissy and B. M25, with difference of setting LU Uds
I used this procedure:
Short IN+ to Gnd
Take off Jumper JP101
Power On
P101 - Adjust for 20mv across R106
P102 - Measure DC Volts from JP101 pin 1 to Gnd - Adjust for 0 volts.
Replace Jumper JP101
P103 - Measure DC Volts from OUT+ Terminal to Gnd - Adjust for 0 volts
P104 - Adjust for 165mV across R129
P105 - Measure DC Volts between Source Pin of M103 and Source pin of M102
Adjust for 2V4 Volts
Short IN+ to Gnd
Take off Jumper JP101
Power On
P101 - Adjust for 20mv across R106
P102 - Measure DC Volts from JP101 pin 1 to Gnd - Adjust for 0 volts.
Replace Jumper JP101
P103 - Measure DC Volts from OUT+ Terminal to Gnd - Adjust for 0 volts
P104 - Adjust for 165mV across R129
P105 - Measure DC Volts between Source Pin of M103 and Source pin of M102
Adjust for 2V4 Volts
Last edited:
in short, that's it
last 3 tweedledees are in some measure interrelated, but what isn't, when speaking of Papamps?
🙂
last 3 tweedledees are in some measure interrelated, but what isn't, when speaking of Papamps?
🙂
as I'm not mounting my LUDEF boards on an L- or T-girder, and the LU-daughterboards from the groupbuy had the solderpads far south I had to use some short wires with heat resistant isolation and little brass standoffs.
tip: use an old flatiron semiheat as hotplate upsidedown in a benchvice
check temperature with solder (should NOT flow)
now put daughterboard on hotplate and solder everything easyly with your standard soldering-iron.
cheers
A.
tip: use an old flatiron semiheat as hotplate upsidedown in a benchvice
check temperature with solder (should NOT flow)
now put daughterboard on hotplate and solder everything easyly with your standard soldering-iron.
cheers
A.
Attachments
nice
just take care of shorts ...... and that 3rd screw hole is practically good for nothing - too close to one end
I would bolt that plate only with 2 side screws
if you insist using just that one (screw hole), do not ask me anything when amp goes in flames
just take care of shorts ...... and that 3rd screw hole is practically good for nothing - too close to one end
I would bolt that plate only with 2 side screws
if you insist using just that one (screw hole), do not ask me anything when amp goes in flames