This is BX500 with balanced input, your schematic is only for bridge two amp channels.
Attachments
sir mile,
can you just clear once,andrewt issue of R23 and biasing
the 4 pair h900 is pre bias with resistor,how is it this time guys are following 3 ef,nazirdigi 5 pair and how about soerdjanto,all in all please guide us in biasing 3 ef
can you just clear once,andrewt issue of R23 and biasing
the 4 pair h900 is pre bias with resistor,how is it this time guys are following 3 ef,nazirdigi 5 pair and how about soerdjanto,all in all please guide us in biasing 3 ef
Hi Apex,
- Can i replace SFA1603 with BYW 29/100?
- Can i replace BAV 21 with BY 299?
Tx,
Regards....
- Can i replace SFA1603 with BYW 29/100?
- Can i replace BAV 21 with BY 299?
Tx,
Regards....
TEF H900
Follow schematic with darlington BD681 and 10k preset for biasing, and I suggest balanced input like in BX500 with volume pot.
Regards
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Hi Apex audio
greetings any particular reason for using BD681 AND balanced input
like BX500 in TEF H900 and is it safe at 70 and 120 volt dc supply rails please
what will be power in 4 ohms and 2 ohms load thinking of making it
warm regards
andrew lebon
Follow schematic with darlington BD681 and 10k preset for biasing, and I suggest balanced input like in BX500 with volume pot.
Regards
___
Hi Apex audio
greetings any particular reason for using BD681 AND balanced input
like BX500 in TEF H900 and is it safe at 70 and 120 volt dc supply rails please
what will be power in 4 ohms and 2 ohms load thinking of making it
warm regards
andrew lebon
I not suggest to use 2 ohms with 4 pairs, on 4 ohms 1200W is maximum power.
Finally, accepting that 15k for R23 in that post does not allow the correct range of bias voltage.
My mistake, for B500 and H900 R23 is 15k, but for B500TEF and H900TEF R23 is 7k5.
H900 TEF TRIAL DRIVER PCB
Dear Sir Apexaudio
hello i have designed TEF driver pcb as you told me
1 Q5 is now BD681 instead of mje 340
2 R22 is 15K
3 R23 is 7.5K
input is balanced following BX500 schematic is it ok now or do i have to do any more changes have 8 output pairs LV is 70 volts dc HV 120 DC are these voltages safe please
can you help me
thanking you
sameerx1
Dear Sir Apexaudio
hello i have designed TEF driver pcb as you told me
1 Q5 is now BD681 instead of mje 340
2 R22 is 15K
3 R23 is 7.5K
input is balanced following BX500 schematic is it ok now or do i have to do any more changes have 8 output pairs LV is 70 volts dc HV 120 DC are these voltages safe please
can you help me
thanking you
sameerx1
Attachments
sir apex can i use hfa08tb60 or byw29-200 for h900 v1,and can i use mur1640 for h900 v2?thanks.
