Complete, is working. G resistance to change 1K no Self-excited.
Congratulations, may I ask you is the picture from hifidiy.net or your own?
I tried to recognize the board, is it selfmade and you used some Lundahls? For the oscillation didnt you make a fault in the positive and negative transformer connection?
That was the one and only reason I had oscillation.....!
To kasey197
Pictures mean F6 has been able to work. Oscilloscope is proven.
G 1K resistance mean, R7 and R8 47.5 ohms of change to 1000 ohms.
To generg
Pictures are posted on the HIFIDIY.NET of my own.
Please see the
·ÂÔìPASSµÄfirst watt F6 - Powered by Discuz!
Please excuse my bad English, try to guess what I said.
Pictures mean F6 has been able to work. Oscilloscope is proven.
G 1K resistance mean, R7 and R8 47.5 ohms of change to 1000 ohms.
To generg
Pictures are posted on the HIFIDIY.NET of my own.
Please see the
·ÂÔìPASSµÄfirst watt F6 - Powered by Discuz!
Please excuse my bad English, try to guess what I said.
Hi kiven chen,
the phasing is correct I looked at your design on the hifidiy.net.
maybe your 2SK1058 are more susceptible to oscillation...
maybe you should only drive the Semisouth without source resistors as far as I understood Nelsons comments.
for other semiconductors the 0R22 or 0R47 are recommended.... maybe for antioscillation or against running hot ... do not know the right word...thermal break away....
the phasing is correct I looked at your design on the hifidiy.net.
maybe your 2SK1058 are more susceptible to oscillation...
maybe you should only drive the Semisouth without source resistors as far as I understood Nelsons comments.
for other semiconductors the 0R22 or 0R47 are recommended.... maybe for antioscillation or against running hot ... do not know the right word...thermal break away....
I mean, MOSFET 2SK1058 (Metal-Oxide-Semiconductor Field-Effect-Transistor) Gate resistance from 47.5 ohms changed to 1K ohms.
Tried it again today,
has come up with a good reason may be the leader,
2sk1058 grid resistance is greater than 68 Ohm is not Self-excited,
on google.com K1058 amplifier Circuit diagram, most used a 220 Ohm,
I don't know if I should put a 220 Ohm, or with a 100 ohm, or other?
Kiven, for gate resistor, use smallest value that still gives stability. In your case above, maybe 100R is ok.
Higher value =maybe more stable= but maybe poorer high frequency response.
Many people use small capacitor between source and gate to ensure stability especially in quasi complementary designs. You can see same in hiraga circuits. Good luck !
Higher value =maybe more stable= but maybe poorer high frequency response.
Many people use small capacitor between source and gate to ensure stability especially in quasi complementary designs. You can see same in hiraga circuits. Good luck !
