What is actually your point with this post?
You claimed that you can measure -160dB THD
And you post some meaningless pictures of equipment that isn't even close to measure something like that.
THx
Reodor
Navigating safely between the shallow waters of objectivism and the reefs of subjectivism does not leave us enough leeway ? ;-)
Just that I can measure all sorts of things you/others might be interested in or want to know. I am constantly adding to the 'warehouse' -- last week I added an HP 4192 to my stock of T&M gear.
You don't seem to know what you are talking about -- The ShibaSoku 725D is shown. It will measure direct off the front panel meter to -130dbv. At the monitor port and with Qa400/401 (FFT) you can see another 30dB lower = -160dbv. This has been proven during eval of Davada's ultra low distortion generator discussed else where. His gen was clocked in at -145.
THx-RNMarsh
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Do you have a link to where you have proved that you can measure -160dB THD?
THx-Reodor
Reoder, apparent master of empty one liners. It would be much more interesting if you checked your wit and focused on expressing your technical argument instead. Attacking ideas is permitted, attacking members isn't.
Thanks
I'm only saying that he is not right.
BTW: should I change my name or is it OK that I say that you are not right?
It is not Reoder, but Reodor
Cheers
Reodor
I would strongly recommend you reread(?) the forum rules, and feel free to change your name if my typo bothers you.
You may have a perfectly valid technical objection to previous remarks, without stating it it is hard to know whether you are just a trouble maker or someone with a good point to make.
You may have a perfectly valid technical objection to previous remarks, without stating it it is hard to know whether you are just a trouble maker or someone with a good point to make.
For example... here is calib with -80db tone added to a 990Hz tone at 1v rms.
I take two gens and mix them with passive resistive divider --- measure each level at analyzer etc.
You can see it as well as the harmonics of Davada's newly designed generator at 990Hz... In the -140's. -160 floor.
It isn't hard for me to measure power amps, either.
Reodor -- what is the good point you wanted to make?
THx-RNMarsh
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At least, don't lie to your ears. Do not use the small numbers make you lie to yourself.Completely in accord. One can feel home both at 'objectivist' and 'subjectivist' sides.
Matthias
Wile I am waiting for 200W CFA boards to arrive I found a time to finally finish my 120W CFA with lateral mosfet OPS. It was waiting to long time, I don’t have excuses not to finish it earlier.
It is simpler version of 100W CFA with vertical mosfet OPS, no enhanced VAS, simulated distortion is of course higher but still low enough. To my ears it sounds very good. And yes it uses same tape of the compensation I use now in all my power amps.
Attached the gerbers if someone is interested. Sorry for elongated shape, I designed that way to accommodate it in to chassis I used before for JLH 80W mosfet amp. I even left the original JLH voltage regularor, but used only +-55V output.
Damir
It is simpler version of 100W CFA with vertical mosfet OPS, no enhanced VAS, simulated distortion is of course higher but still low enough. To my ears it sounds very good. And yes it uses same tape of the compensation I use now in all my power amps.
Attached the gerbers if someone is interested. Sorry for elongated shape, I designed that way to accommodate it in to chassis I used before for JLH 80W mosfet amp. I even left the original JLH voltage regularor, but used only +-55V output.
Damir
Attachments
Ah you know Matthias, one is never satisfied always wants something new and not always better.
BR Damir