Here are the correct measurements perys | perys - hqqf_osc_finalverze-8R550mA-sin ? rajce.net
Features
I`m certain that Low OL gain is the problem
I`m certain that Low OL gain is the problem
No problem can be different.
Measured amplifier is my property. My people completed it from modules delivered by Mr. Federmann. He also supervised assembling process.
We made small party where we did also listening test. On this party was the amp measured by PMA (see the link above). Because time was limited for proper measurement, Flyingbird offered me to do complete test in his home. Result you can find on valachnet link.
Thanks LGS (and everyone else)
LGS have a faulty output filter, output filter to fix, and then Measure. LGS was informed long ago.
Federman, this is just an observation, however you would I think do yourself a favour by stating this at the outset, rather than just dismissing sendy's post.
If the output filter is part of the module you sold (It doesn't look like it from the pictures of the circuit board) then you would do yourself an even bigger favour by admitting to having provided a faulty module (I don't know if it is on or off board).
Anyone selling something needs to have customer service in the forefront of their thoughts. We are a tough crowd here at diyAudio and sometimes just admitting a mistake, apologizing and offering the solution to fix it will win you more respect than you could imagine If you aren't at fault then simply offering assistance to solve the problem will also do wonders.
You obviously strongly believe in your product, If you work with the people who are questioning it rather than against them I think you will be much more likely to succeed
All just in my opinion of course
Tony.
Federmann, "perys amplifier" is off topic.... amplifier with yours PCB, but half supply voltage, large external supply filter caps, other compensation, other opamp, and 5x higher quiescent current !!!
I think it was a long way from HQQF to "perys HQQF"...
perys | perys - hqqf_osc_klidovy-proud ? rajce.net
I think it was a long way from HQQF to "perys HQQF"...
perys | perys - hqqf_osc_klidovy-proud ? rajce.net
Last edited:
Federmann, "perys amplifier" is off topic.... amplifier with yours PCB, but half supply voltage, large external supply filter caps, other compensation, other opamp, and 5x higher quiescent current !!!
I think it was a long way from HQQF to "perys HQQF"...
perys | perys - hqqf_osc_klidovy-proud ? rajce.net
You are wrong. Many measurements done here.
An externally hosted image should be here but it was not working when we last tested it.
Example specifications
An externally hosted image should be here but it was not working when we last tested it.
Example specifications
PLS, send something real, not Fata Morgana, not Manifesto of the Communist Party.
An externally hosted image should be here but it was not working when we last tested it.
Example specifications
Clearly wrong. With +/-50V, you cannot get 1000W in 4 ohms. With +/-60V you cannot get 800W in 8 ohms.
Makes me wonder how real the other numbers are.
jan didden
±60V, two modules, 230Vpp, (81V/8Ω)
±50V, two modules, 190Vpp, (66V/4Ω)
Really? So how can the average then be 100W in 4 ohms and the max 1000W in 4 ohms? What's the difference between the 300W and the 1000W number? How did you measure it?
Same questions for 8 ohms, please.
jan didden
Attachments
120Vpp/4Ω
One module, ±66V
Last edited:
Really? So how can the average then be 100W in 4 ohms and the max 1000W in 4 ohms? What's the difference between the 300W and the 1000W number? How did you measure it?
Same questions for 8 ohms, please.
jan didden
300W and dynamic headroom 5dB = 1000W
100W and dynamic headroom 10dB = 1000W
B. Federmann
Last edited:
No comment perys | seznam alb ? rajce.net
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
- Home
- Vendor's Bazaar
- Mosfet amp, 5 pairs IRFP240/9240