That's it!
Finally got away from SS, now I kinda want to try it as a guitar amp, now that I have tubed gear.
Maybe Apexaudio could start an instrument chipamp thread. Maybe even a higher wattage version like parallel LM4780's etc.
I would love to bring a 100W amp the size of a large sandwich to the jam spot.
Finally got away from SS, now I kinda want to try it as a guitar amp, now that I have tubed gear.
Maybe Apexaudio could start an instrument chipamp thread. Maybe even a higher wattage version like parallel LM4780's etc.
I would love to bring a 100W amp the size of a large sandwich to the jam spot.
Hi globug.
i think you will need a class d amplifier to get it as small as a large sandwich as not much heatsinking is required..
best regards Ian
i think you will need a class d amplifier to get it as small as a large sandwich as not much heatsinking is required..
best regards Ian
Tried the circuit . I am happy with the result , though i find that the volume level is not good enough . Dosent sound like a 60w amp . Does the circuit need a pre amp ? I connected it directly to a mobile headphone out . sounds like a 5 watt amplifier
Try it with another source, it should be louder then that.
Maybe you got a fake chip. Where did you buy it?
Maybe you got a fake chip. Where did you buy it?
Measure the output of your
Go read system gain article.
Tell us the gain of your 3886 amplifier.
Go read system gain article.
I wanted to try out the amp .. so i had to use anything that was avaliable and it was my phone .
Yes , i did increase the gain by increasing the resistor value , but it i feel the sound is not as good as it is when using the 15k resistor . Still testing though since i made 4 modules for bridging into stereo . Will update as soon as it is done .
Yes , i did increase the gain by increasing the resistor value , but it i feel the sound is not as good as it is when using the 15k resistor . Still testing though since i made 4 modules for bridging into stereo . Will update as soon as it is done .
dear apex,
i want to take this chip from national semiconductor as sample?how can i get it?
thanks
i want to take this chip from national semiconductor as sample?how can i get it?
thanks
If you have any collage email id or company email id. just order samples from NS (now merged with TI). only u'll have to pay for shipping (some 250 Rs for 5 ICs). Bur mind it , its is only for DIY, no commercial use.
I got question for this case, I try to calculate Ci based on LM3886 datasheet formula with below parameters:
- TDP 50watt, impedance 8ohm, input 1V, Rf22k; so you'll get Ri 1k3 and Ci 21uF
This case seems to be applied in many designs, but what if I increase Rf into higher value? below case for example
- TDP 50watt, impedance 8ohm, input 1V, Rf330k; so you'll get Ri 18k and Ci 1.5uF
Is it applicable to use high resistance on R feedback? I'm thinking to use high quality poly caps for this Ci, 1-2uF is still affordable, but not for 22uF 🙂
- TDP 50watt, impedance 8ohm, input 1V, Rf22k; so you'll get Ri 1k3 and Ci 21uF
This case seems to be applied in many designs, but what if I increase Rf into higher value? below case for example
- TDP 50watt, impedance 8ohm, input 1V, Rf330k; so you'll get Ri 18k and Ci 1.5uF
Is it applicable to use high resistance on R feedback? I'm thinking to use high quality poly caps for this Ci, 1-2uF is still affordable, but not for 22uF 🙂
Its the import duty or custom clearance charges which we have to pay. Say i had paid 5$ in India.