What pcb's are used in your Ultimate Fidelity Amp ? It shows 2 for the amp, 1 for the psu and another ? That is very close to what I'm looking to build. Please list pcb's used ! Thank-you
You don't need to use this LED VU pcb for Hi-Fi amp,What pcb's are used in your Ultimate Fidelity Amp ? It shows 2 for the amp, 1 for the psu and another ? That is very close to what I'm looking to build. Please list pcb's used ! Thank-you
Regards
Attachments
Current thru differential is 600uA per transistor, and thru VAS is 6mA. 2SB817/2SD1047 can be used for AX14 amp.
Regards
Regards
Sanken 2SA1294/2SC3263 and 2SA1491/2SC3855 or 2SA1492/2SC3856 are good for AX14 also.
Last edited:
@ mihailo
In thread http://www.diyaudio.com/forums/solid-state/164208-500w-pa-amplifier-limiter-36.html I see yours pcb for A100, I like hear your comment here about sound and comparation betwin A100 and B500 when you finish A100,
Regards
In thread http://www.diyaudio.com/forums/solid-state/164208-500w-pa-amplifier-limiter-36.html I see yours pcb for A100, I like hear your comment here about sound and comparation betwin A100 and B500 when you finish A100,
Regards
Apex I have finished one channel, and my multimeter is showing 14.6V DC on output. Transistors were new, I have buy them today.
Just now saw your post about polarity of diode 1N4148, and reverse polarity but still I have 14V on output.
Can you help me to check are BDW trans. ok?
Don't know how to measure them, are they different in measuring from standard NPN,PNP? 😱
Don't have much experience in electronics. I am student of Mechanical faculty University 3rd year, we learn only basic electronics. 😱
Just now saw your post about polarity of diode 1N4148, and reverse polarity but still I have 14V on output.
Can you help me to check are BDW trans. ok?
Don't know how to measure them, are they different in measuring from standard NPN,PNP? 😱
Don't have much experience in electronics. I am student of Mechanical faculty University 3rd year, we learn only basic electronics. 😱
You must connect input GND to PSU GND with separate wire (input GND and power GND are not conected on pcb), or use 10R in paralel with 100nF for test,Apex I have finished one channel, and my multimeter is showing 14.6V DC on output. Transistors were new, I have buy them today.
Just now saw your post about polarity of diode 1N4148, and reverse polarity but still I have 14V on output.
Can you help me to check are BDW trans. ok?
Don't know how to measure them, are they different in measuring from standard NPN,PNP? 😱
Don't have much experience in electronics. I am student of Mechanical faculty University 3rd year, we learn only basic electronics. 😱
Regards
Attachments
Last edited:
Yes, but many TO220 drivers can be use for AX14 like 2SA1306/2SC3298 or similar. For BIAS adjust put 10R resistors instead fuses and set 500mV on them,It is hard for me to get 2SC4793 and 2SA1837 . Are MJE15033 and MJE15032 good substitutions?
Regards
I will post in threadapex, can you post the board layout for the led vu meter?
http://www.diyaudio.com/forums/solid-state/167363-mic-line-eq-preamps-11.html
Regards
- Home
- Amplifiers
- Solid State
- 100W Ultimate Fidelity Amplifier