A considerable difference, 100k @ 2v p-p should not smoke a zobel, unless your making the amp oscillate. If your meter's bandwidth is rubbish then it might show 1v when in fact it should be showing 10. If you then turn things up to get the output back where you think it should be, then the amp is in fact putting out significantly more than you think it is and poof, up goes the zobel.
For example the 10 ohm 3 watt resistor in the zobel should be able to handle being loaded directly with 100k 2v p-p all day. There's no way it should be smoking.
If you've got a scope simply use that to set the output level.
I also have a Leader LMV-185A but have never used it. I will try hooking it up and compare. The zobel that smoked was a 1w resistor.
Terry,
If it is supposed to be a true rms dmm it will for sure say that on the front of the meter. I have a couple of them and they do cost more than a similar meter that is not supposed to be true rms.
If it is supposed to be a true rms dmm it will for sure say that on the front of the meter. I have a couple of them and they do cost more than a similar meter that is not supposed to be true rms.
2 volts DC into 10 ohms is only 0.4 of a watt. Whatever you're doing with the amp, even with that tiny zobel, if it's running properly, 2 volts peak to peak of anything put on the input should be entirely safe.
Super A is not properly compensated, phase margin fall well into positive gain bandwidth. 😱
Properly designed power amplifier must withstand 20 kHz full power signal no matter the shape at all times, zobel must not smoke at 40 kHz/-3 dB full power output.
I was talking about 2Vac at 100K. I'm obviously doing something wrong. I should just be quiet at this point.
No! Hehe, just a small bit of humour based on the number of amplifiers you seem to have lying around 😉
Terry, your participation to this forum is blessing, letting all those amps to variety of signals and whatever results are beneficial to all DIY-ers to avoid dangerously unstable designs. So please put the list back to your signature and continue with your precious work - lovely hobby.
I am quite impressed by the list of amps you have built still4given. Means when you say A sounds better than B your informed and unbiased. People (like me 🙂) tend to have their pet projects and that colours their view.
"FOLDED LEACH" ...
I'm still on Miib's first post .... 😱
I DO like the "folded" deal !
(below) , the original spooky with Miib's folded hawksford and it rocks.
THD20 is now 2-3ppm (spooky is 10 ppm). TOTAL even order cancellation ,
NO h2/h4 .... just a little H3 , even beats the blameless (wolverine) now.
PSRR is 10db better.
I figured out what is happening ... an error- correcting hawksford. 😎
OS
I'm still on Miib's first post .... 😱
I DO like the "folded" deal !
(below) , the original spooky with Miib's folded hawksford and it rocks.
THD20 is now 2-3ppm (spooky is 10 ppm). TOTAL even order cancellation ,
NO h2/h4 .... just a little H3 , even beats the blameless (wolverine) now.
PSRR is 10db better.
I figured out what is happening ... an error- correcting hawksford. 😎
OS
Attachments
I'm going to add the mirrors .... see what this "brings to
the table".
I did not see that second post (glitch ?).
OS
the table".
I did not see that second post (glitch ?).
OS
