You can use BC546/556 instead BC550/560, and use TL071 or LF411 no need for dual OP amp for single channel DC servo, with dual OP amp second OP amp is for thermal protect.
Regards
Old days
This was my first pcb i had made that too first time for my first class-H back in 2006 with a cheap traxmaker software.
This was my first pcb i had made that too first time for my first class-H back in 2006 with a cheap traxmaker software.
Hello ,
apex , can you tell me witch is the value of c39 , c40 ,c32,c36,c35,c34, c27, on vertex2500
and maybe the power disipation of r69 r70,R6 ,R88, And a more comun replacement for her156 ,bav20 , and anather thing can i replace 1n4744 with anu 15v zener diode ?
I'm asking this questions because i will make the pcb for this one.
Can vertex2500 be drive on 2 ohm loads? that will be more than 45Amps throught the speaker , and more than 7 amps trought one tranzistor , i think it excedes SOA capability .....
apex , can you tell me witch is the value of c39 , c40 ,c32,c36,c35,c34, c27, on vertex2500
and maybe the power disipation of r69 r70,R6 ,R88, And a more comun replacement for her156 ,bav20 , and anather thing can i replace 1n4744 with anu 15v zener diode ?
I'm asking this questions because i will make the pcb for this one.
Can vertex2500 be drive on 2 ohm loads? that will be more than 45Amps throught the speaker , and more than 7 amps trought one tranzistor , i think it excedes SOA capability .....
hi apexaudio
greetings today tried to test vertex with 70 0 70 dc voltage rails
1 negative side zener showing only 16 volts should be 33 volts
2 56 volts positive dc on output 18 k resistor heating
any clues can you please share complete circuit of vertex so i can complete it
diodes used are1N5399 is it ok.hoping you can please help me out with schematic
thanking you
andrew lebon
greetings today tried to test vertex with 70 0 70 dc voltage rails
1 negative side zener showing only 16 volts should be 33 volts
2 56 volts positive dc on output 18 k resistor heating
any clues can you please share complete circuit of vertex so i can complete it
diodes used are1N5399 is it ok.hoping you can please help me out with schematic
thanking you
andrew lebon
i am in for vertex . i would like to build such a massive amp. having completed b500 i feel confident . kindly share vertex's details .
regards
sekhar
hi apexaudio
greetings please can you help me out negative 33 volt zener
showing only 16 volts
1 18 k resistor getting hot can you tell me if vertex schematic is complete i
am not making vertex step regulator want to test amp in ab class only so
can you help me out if you say circuit is complete then i can find fault
hoping for your help
thanking you
andrew lebon
greetings please can you help me out negative 33 volt zener
showing only 16 volts
1 18 k resistor getting hot can you tell me if vertex schematic is complete i
am not making vertex step regulator want to test amp in ab class only so
can you help me out if you say circuit is complete then i can find fault
hoping for your help
thanking you
andrew lebon
R86 is 18k/5W, and with +/-70V DC use for R6 and R7 4k7/2W instead 10k/2W, can you post pictures?