500W PA amplifier with Limiter - Page 90

sekhar · 26th November 2010, 05:13 PM

hey aman whr do u get ur toriadal tf made ................

regards
sekhar

engel dela pena · 26th November 2010, 11:47 PM

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

engel dela pena · 11:57 PM

?

engel dela pena · 26th November 2010, 11:59 PM

andrewlebon,
you already built this step don't you?
how is it?

andrewlebon · 27th November 2010, 12:20 AM

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

rhodrich · 27th November 2010, 12:23 AM

Quote:

Originally Posted by andrewlebon

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

@andrew

diysmps 1200 have fault on placement of parts or just ok. hows the amp did it sounded good?

andrewlebon · 27th November 2010, 12:42 AM

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

rhodrich · 27th November 2010, 12:47 AM

@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.

irvynejay · 27th November 2010, 12:52 AM

Quote:

Originally Posted by andrewlebon

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

Andrewlebon pls check your in-box im still waiting for you reply ty

andrewlebon · 27th November 2010, 12:54 AM

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

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26th November 2010, 05:13 PM	#891
sekhar diyAudio Member Join Date: Jul 2009 Location: West bengal/siliguri	hey aman whr do u get ur toriadal tf made ................ regards sekhar

26th November 2010, 11:59 PM	#894
engel dela pena diyAudio Member Join Date: Oct 2005	andrewlebon, you already built this step don't you? how is it?

27th November 2010, 12:20 AM	#895
andrewlebon diyAudio Member Join Date: Feb 2008	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

27th November 2010, 12:42 AM	#897
andrewlebon diyAudio Member Join Date: Feb 2008	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

27th November 2010, 12:47 AM	#898
rhodrich diyAudio Member Join Date: Jul 2008	@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.

27th November 2010, 12:54 AM	#900
andrewlebon diyAudio Member Join Date: Feb 2008	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