Hi saran
Voltage looks fine.
please remember that measuring a resistor with DMM in a circuit can be nonsense!
to measure correct look at the value or open /desolder on side and measure the resistor- here with SMD not possible.important is that the voltage is ok.
chris
Means? Not to use 32V PSU?
are you mentioning 10 uF for this Cap?
Thanks
leave this as it is. without scope probe you cant see the "noise" of the LM317 (fake) output
Hi saran
As far as i remember guys have no problem using psu with 30V-32V or with 28V.
the LM317 have to waste this extra voltage in heat so this could be problem.
with psu of 28V- 32V you will get more power but i personally think with this construction of the amp (closed housing and small heat sink) and our modification done here its "useless" to push more then 10-30W continuously out of it.
chris
Noted. Thanks.
I have plan to add the copper heat-sink at the bottom. waiting for copper strip to come.
Later will do..
NOOB question.
for burn-in (break in), amp need to be continuously ON/Playing?
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Noted. Thanks.
I have plan to add the copper heat-sink at the bottom. waiting for copper strip to come.
Later will do..
NOOB question.
for burn-in (break in), amp need to be continuously ON/Playing?
hmm.. "burn in"
often discussed and electrical not easy to explain. normally the components laying around and are stored very long time (years) and then it get soldered into your amp. so let the amp running during listening 2-4 hours and then switch it off. after a week or so everything should be fine.
chris
it is just another myth of the audiophools, not more, not less
another bucks bunny in Audio
you should think about the Chinese caps. in this amp
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Well if you consider al cheapo boards from Ali Baba populated with fake parts a burn in may help ending in an early end-of-life. Personnally I do not get where the fun is in buying this crap and doing the quality control as DIY. I am just an old-school German engineer who focuses on quality and reliability.another bucks bunny in Audio
you should think about the Chinese caps. in this amp
you are right. quality is not on the first position at this boards- but for starting/learning i find they are not bad...
It is your choice. I really doubt there is much you can learn by swapping parts.
In my amp, seems Left & Right channels are reversed.
I double checked the wiring connection.
Mobile to RCA- Correct
Speaker terminals - Correct.
checked same track with headphone & amp, different channels.
How to Check if your Speakers are Wired Correctly | Richard Farrar
Left and Right tracks from this link also reversed (Left plays in Right & Right plays in Left)
anybody else experiencing this? Please confirm
I double checked the wiring connection.
Mobile to RCA- Correct
Speaker terminals - Correct.
checked same track with headphone & amp, different channels.
How to Check if your Speakers are Wired Correctly | Richard Farrar
Left and Right tracks from this link also reversed (Left plays in Right & Right plays in Left)
anybody else experiencing this? Please confirm
Just received my 3e-Audio TPA3250 amplifier with Bluetooth as suggested by another person on here. 14 days to deliver to the UK from China.
Very Very pleased with this amplifier. The fact it includes the internal power supply is a major step forward from other similar Chinese TPA3251 and TPA3255 amplifiers - I have both the Aiyima 04 TPA3251 and Aiyima A07 TPA3255 amplifiers and they are both good.
Actually prefer the TPA3251 as the lower operating voltages allow bigger Caps in the Power supply - three times the capacity.
Only started to play with this new model today so time will tell but early impressions are very positive. It is absolutely silent, whereas all the other amps I have tend to emit a small amount of noise with no signal. The Bluetooth module does not appear to affect the main amplifier - No noise from this source. The design seems solid - No Power On clicks !
Very nice not to have external brick of a power supply and only slightly larger - In fact I prefer its size to the many Micro Amps that come out of China.
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Just received one of these today - Very impressive. Nicely built and sounds good out of the Box.
Have attached some photos and comparison with Aiyima A04 TPA3251 amplifier.
I think the integrated amplifier from 3e-Audio will be much easier to live with as no external Power Supply brick to find space for !!!
