by removing 1nf cap from pin 2 of TL071 there would be around rail voltage at output
also disconnecting pin 2 of TL071 from feedback will cause no signl in output
Hi,
Sorry the FB link erased. its my mistake connect FB and remove 1nF cap
without 1nF cap, with your coil you get approx. 235KHz
Regards
MANOJ
Sorry the FB link erased. its my mistake connect FB and remove 1nF cap
without 1nF cap, with your coil you get approx. 235KHz
Regards
MANOJ
Reduced the ETD39 turns to 20 and now I get about 250KHZ with 1kohm resistor(lower value will decrease frequency)
I think that 14 Volts drops in output voltage is dissapated in output core winding because it gets really hot in a few second
can I use multiple threaded wire gauge like 0.25mm
can I use multiple threaded wire gauge like 0.25mm
Hi dear manoj
I use T106-2 core with 60 turns of 0.75 wire and 3uf output cap and with these value the output signal is the cleanest and the sound is so clean
as I said before by increasing the 1K resistor I can increase the frequency, so I go higher than 1K and now I have 250kHz frequency
do you think that there might be some problem with my amp?
I ordered T157-2 and I will be using it for my 800W amps
I'll appreciate your help
I use T106-2 core with 60 turns of 0.75 wire and 3uf output cap and with these value the output signal is the cleanest and the sound is so clean
as I said before by increasing the 1K resistor I can increase the frequency, so I go higher than 1K and now I have 250kHz frequency
do you think that there might be some problem with my amp?
I ordered T157-2 and I will be using it for my 800W amps
I'll appreciate your help
47uH it is too high(not bad) use 33uH or 22uH it is good( you will get more current on output)22uH is best.
Yes. (for better reliability use below 1K. otherwise unwanted oscillation will occur.)
Regards
MANOJ
Hi,
Sorry typing mistake
T157-2 core 1.5mm wire 40T = 22uH
T157-2 core 1.5mm wire 49T = 33uH
Regards
MANOJ
Sorry typing mistake
T157-2 core 1.5mm wire 40T = 22uH
T157-2 core 1.5mm wire 49T = 33uH
Regards
MANOJ
No. ex... if you get fsw like 500Khz on 1k, reduce the the value 1k to 580 then you will get @350KHz~420KHz
Regards
MANOJ
with 1K I get about 185Khz and If I ge higher Like 1.5K it will go up to 250Khz
I I go higher it decrease frequency further more like 135Khz
for getting highest freq. it should be a good components,FB resistor with respect to supply voltage, coil and PCB
Regards
MANOJ
thank alot dear Manoj
I will try to get higher frequency by using better component and will report back
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This is,according to measured value, 21uH but the question is how i can add more turns to reach the 33uH?
Using a thinner wire or adding a second layer?
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