Hi, Olafk!
Sorry if this has been asked before... is there a thread (or even somewhere here) that you compare all models you have built so far?
I wonder what are the singularities for each one. For those who can't build every model, this would be a major help.
BTW, HAPPY NEW YEAR FOR ALL FOLKS!
Sorry if this has been asked before... is there a thread (or even somewhere here) that you compare all models you have built so far?
I wonder what are the singularities for each one. For those who can't build every model, this would be a major help.
BTW, HAPPY NEW YEAR FOR ALL FOLKS!
No, there is no comparison. The amplifier were built over a long period of time and the best is always the last. Many users have built the Apex amplifier.
Regards Olaf
Would be interrestingto ask here.
i don´t like to write my soound impresions either,and the reason is it´s subjective nature. something i like doesn´t have to be liked by someone else and vice-versa. if i say for any amplifier that i don´t like the sound of it,i believe after reading those words that many people will avoid that amplifier and just that one might be the one they would really like to listen and have for them selves.
only thing i do share are measurements done by volt- amper- meters or osciloscope. they will not tell a lot about sound but will say almost all about stability and ability of an amplifier that was measured.
recently i measured all APEX amplifiers that i have done,and i must say that Mile APEX is pretty shy when it comes to measured results of his projects. for example, some would say that b-class can´t be HiFi but AX12 (B80) listening AND measurements say oposite : very nice square wave even in more than 50kHz and wide bandwidth of sinus wave amplifying without decreasing amplifying ratio. all that for an amplifier containing 12 transistors of wich 4 are in output stage.
can it be more simple for a beginer to get a pretty powerfull nice sounding and very well perforiming amplifier without any adjustments?
similar goes to APEX AX11...
only thing i do share are measurements done by volt- amper- meters or osciloscope. they will not tell a lot about sound but will say almost all about stability and ability of an amplifier that was measured.
recently i measured all APEX amplifiers that i have done,and i must say that Mile APEX is pretty shy when it comes to measured results of his projects. for example, some would say that b-class can´t be HiFi but AX12 (B80) listening AND measurements say oposite : very nice square wave even in more than 50kHz and wide bandwidth of sinus wave amplifying without decreasing amplifying ratio. all that for an amplifier containing 12 transistors of wich 4 are in output stage.
can it be more simple for a beginer to get a pretty powerfull nice sounding and very well perforiming amplifier without any adjustments?
similar goes to APEX AX11...
Hi, I started with the modules for my A9-Amplifier. Because of the ease installation I have changed the layout, so that a BD139 can be mounted on the heatsink. If anyone needs the layout, I can post it.
I have tested with + -36V DC. The BC and first MPSA be quite warm.
Mile, at which max. voltage the A9 can be save operated?
regards Olaf
I have tested with + -36V DC. The BC and first MPSA be quite warm.
Mile, at which max. voltage the A9 can be save operated?
regards Olaf
Attachments
Nice pcb,
Regards
Trying to get my A33 working. Not enough VAS output to bias the outputs. I created a spice file to try and locate my problem but the spice file is doing the same thing. Could someone please take a look at it and see where my error is?
Don't pay attention to the part numbers. There are none on the schematic so I didn't worry about sequence.
Thanks, Terry
Don't pay attention to the part numbers. There are none on the schematic so I didn't worry about sequence.
Thanks, Terry
