Many thanx
rewinding the trapo now and one more thing can this trapo 55v 35v 0 35v 55v can i use this for testing purposes?
ok ty mile ill post when im done with my new B500 with your step drive TL072
rewinding the trapo now and one more thing can this trapo 55v 35v 0 35v 55v can i use this for testing purposes?
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I mean with trapo 55vac 35vac 0 35vac 55vac can i use this on b500 with tl072 step drive for test?
there is no forgot jumper wire
input GND to PSU GND is ok,.
i will post pcture soon as possible
wich is correct
to mile pls help
lol my bad which of this is correct1 or 2,i just want to make sure before i connect the step drive to my b500
to mile pls help
lol my bad which of this is correct1 or 2,i just want to make sure before i connect the step drive to my b500
Attachments
![APEX%20Hclass%20Power%20DriverMON[1].jpg](/community/data/attachments/172/172331-1020495d647f77f2ae9a2697faa86d7e.jpg?hash=ECBJXWR_d_)
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hey aman i saw ur build it is just great . Did u use the drive transistor as same as the output transistors...???????????/
regards
sekhar
hi miles i was looking for some to 220 mosfets with complete plastic package so that i can use them in the step driver. using that plastic insulation for my earlier amp had lot of failure they simple use to melt. can u direct me towards some completely plastic package mosfets so that i dont have to use that plastic thing............. and one more thing can i use irfp260 or irfp250 instead of irf 540
regards
sekhar
apex,
irvynejay,
a closer look at the schematic
i.c. pin 1 goes to bf 422.So neg supply must be pin 4 where signed as +15.
somebody must check my observation
pin 7 goes to 423,pin 8 must be positive where signed as -15
TLO72
pin 4 neg supply
pin8 pos supply
irvynejay,
a closer look at the schematic
i.c. pin 1 goes to bf 422.So neg supply must be pin 4 where signed as +15.
somebody must check my observation
pin 7 goes to 423,pin 8 must be positive where signed as -15
TLO72
pin 4 neg supply
pin8 pos supply
Attachments
hi engel dela pena
greetings yes it is working fine only use last schematic of tlo72 step driver the 10uf and 10 volt zener wrong orientation corrected driver
stage from diysmps 1200 watt works fine 10 output pairs used it good if
IR2117 NOT AVAILABLE but i think coolets pcb is best if u use tlo 72 step driver
no wiring more compact will try coolets pcb in a few days and post pictures
weather here really cold use IRF2807 instead of IRF540
THANKING YOU
andrew lebon
greetings yes it is working fine only use last schematic of tlo72 step driver the 10uf and 10 volt zener wrong orientation corrected driver
stage from diysmps 1200 watt works fine 10 output pairs used it good if
IR2117 NOT AVAILABLE but i think coolets pcb is best if u use tlo 72 step driver
no wiring more compact will try coolets pcb in a few days and post pictures
weather here really cold use IRF2807 instead of IRF540
THANKING YOU
andrew lebon
@andrew
diysmps 1200 have fault on placement of parts or just ok. hows the amp did it sounded good?
hi rhodrich
greetings no it is correct came on first time sound very nice mids
silky highs i use it for mid tops for more base use 10uf as told by erhan
thanking you
andrew lebon
greetings no it is correct came on first time sound very nice mids
silky highs i use it for mid tops for more base use 10uf as told by erhan
thanking you
andrew lebon
@andrew
how u adjust the bias? it 10uf ceramic or mylar? i would like to try that one coz going to try with higher voltage.
how u adjust the bias? it 10uf ceramic or mylar? i would like to try that one coz going to try with higher voltage.
hi rhodrich
greetings just keep preset in middle ehran says 10uf ioo volts NP
even the maxter looks promising havent tried it WILL try it soon
thanking you
andrew lebon
greetings just keep preset in middle ehran says 10uf ioo volts NP
even the maxter looks promising havent tried it WILL try it soon
thanking you
andrew lebon