apex stereo protect
Here's the .lay file for the stereo protect 🙂
This one is adapted to an single 15VAC secondary as an PSU,for higher voltages another relay and it's backing resistor value should be changed 😀
On the sidenote,I built that FH11 in the post above 😉
Here's the .lay file for the stereo protect 🙂
This one is adapted to an single 15VAC secondary as an PSU,for higher voltages another relay and it's backing resistor value should be changed 😀
On the sidenote,I built that FH11 in the post above 😉
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Hello Ripcord, thank you for making these files available.
Are you planning to order some boards? I would chip in for a couple.
thanks
Are you planning to order some boards? I would chip in for a couple.
thanks
I probably will and if I do you can have a couple. I'll have six or seven to give away. I'll keep ya posted.
What bias current did you adjust the FH11 for?
That is: the current or voltage on R15A.
Apex,
I have simulated the FH11 on LTSpice, trying several bias currents.
That's why I wanted to know the bias you used to get 0.045% THD @ 1KHz, getting 225watts for 8ohm load, and 60v p-p.
For 8ohms it would be impossible to get 225 watts with a +/-60v supply. What I get at 8ohms is 142 watts for 1KHz, and 0.004% THD. That is at pre-clipping levels.
Not superb, compared with a Honeybadger, for instance, but decent.
What I found is that output could be improved if the LTP THD is improved. In most designs I have simulated, the LTP was very good until it went through the VAS.
Which of your LTP inputs has lower THD?
I have simulated the FH11 on LTSpice, trying several bias currents.
That's why I wanted to know the bias you used to get 0.045% THD @ 1KHz, getting 225watts for 8ohm load, and 60v p-p.
For 8ohms it would be impossible to get 225 watts with a +/-60v supply. What I get at 8ohms is 142 watts for 1KHz, and 0.004% THD. That is at pre-clipping levels.
Not superb, compared with a Honeybadger, for instance, but decent.
What I found is that output could be improved if the LTP THD is improved. In most designs I have simulated, the LTP was very good until it went through the VAS.
Which of your LTP inputs has lower THD?
Mancube, Ripcord,
I understand the DC protect for the speakers. Is the over protect the same as protection against the inrush????.
Thanks for the clarification,
Myles
I understand the DC protect for the speakers. Is the over protect the same as protection against the inrush????.
Thanks for the clarification,
Myles
Sorry, I meant is " overload protection the same as protection against the inrush????."
Myles
Myles