UCD 25 watts to 1200 watts using 2 mosfets

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andrewlebon

andrewlebon

R.I.P.
Joined 2008
hoping against hope

Hi JAY
working on it
warm regards
andrew lebon;)
 

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akraj

Member
Joined 2010
manojtm said:
Hi Raj,

use BAL IN for input or you can use as unbalanced mode
UN Balanced Mode:
(+) sign connected to GND(marking shows wrongly)
(-) sign as input with respect to GND

Regards
MANOJ
Click to expand...

Hi Manoj:

I tried as you mentioned, given input to both -+ points one after another with respect to gnd. Still no sound from Spk.

But if I connect Pin-2 (tl072) to gnd through 220n or resistors like 1K then I get output.

Managed to prepare output inductor as per your instruction. Improved a bit, I used EE cores 24turns 19SWG wire. How many turns for emi reduction coil?

Thanks
Raj
 
A

akraj

Member
Joined 2010
Hadighorbani said:
schematic and pcb can not work without aplication program
PT2322 project near the end
i replace new ic with PT soon
when complete the project i share that with you friend.
what about AUD600 ?
compelet that ?
Click to expand...

Hi Hadi/Manoj/Stewin:

I completed aud600 ver1.0 it works but has some problems. Now trying to solve them

1. If I give audio input to - or + sign with respect to gnd (giving any -/+ to gnd) then there is no output until I give gnd through cap/resistor to pin 2 of tk072 then I get output. Why?

2. My 47ohms resistors are burning instantly, HF is too high but how to control that?

3. I get choppy sound at higher volume.
NB: resistors in pic burned (value is ok) when I used them in 47ohms position.
Have you faced any of such problem? And how you fixed that?
 

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Hadighorbani

Member
Joined 2010
Hi dear friend

akraj said:
Hi Hadi/Manoj/Stewin:

I completed aud600 ver1.0 it works but has some problems. Now trying to solve them

1. If I give audio input to - or + sign with respect to gnd (giving any -/+ to gnd) then there is no output until I give gnd through cap/resistor to pin 2 of tk072 then I get output. Why?

2. My 47ohms resistors are burning instantly, HF is too high but how to control that?

3. I get choppy sound at higher volume.
NB: resistors in pic burned (value is ok) when I used them in 47ohms position.
Have you faced any of such problem? And how you fixed that?
Click to expand...


Hi friend
is this an amp ?:)
some time we must wait and try long time. when we wait for along time we can find beter way for our problem.
dont be tierd friend and try more and more. you can do any thing if you want.
best wishes for you friend
 
manojtm

manojtm

Member
Joined 2008
hifiworld.info
1. If I give audio input to - or + sign with respect to gnd (giving any -/+ to gnd) then there is no output until I give gnd through cap/resistor to pin 2 of tk072 then I get output. Why?
Click to expand...

Hi Raj,

VOLUME control(100K or 50K) side pin connected to 33K resistor from Pin-7 of TL072, center pin from Pin-2 of TL072 and another side from Pin-1 of TL072.

Regards
MANOJ
 
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