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Old 17th November 2012, 08:47 AM   #2841
generg is offline generg  Germany
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forgot...

After turning on and waiting the time the 1000uF are filling about 15 sec and you see your LEDs flickering, turn off! In this case you have an AC of around 24V at the output, you can see it by changing your DMM from DC (offset measuring) to AC. Really heavy!

In this case you can be sure you made a fault in the PTP of the xformer, mostly I changed upper and lower secondary or even the phase of one secondary winding. Not looking thorough fully on which side point 5 really is.....

would not happen with a pcb, but with ptp changing the xformers often, it happens every third time..
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Old 17th November 2012, 12:40 PM   #2842
Ryssen is offline Ryssen  Sweden
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Can 2 channels share one PSU?
Is a 300VA trafo enough?
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Old 17th November 2012, 12:46 PM   #2843
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Quote:
Originally Posted by Ryssen View Post
Can 2 channels share one PSU?
Is a 300VA trafo enough?
My 'guess' would be that if you build the same power supply as you would for an F5 you'll be just fine.

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Dan
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Old 17th November 2012, 01:09 PM   #2844
generg is offline generg  Germany
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Quote:
Originally Posted by Ryssen View Post
Can 2 channels share one PSU?
Is a 300VA trafo enough?
F6 has a bit higher demands than F5 I think. 1,2A against 1,5A (F6)...

but of course you can go to any value between 1,3 and 1,5

and Nelson uses in F3 and F5 and J2 and M2 and....... so on always 300W Plitron...

I do not know if they are especially good for their money.....
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Old 17th November 2012, 01:41 PM   #2845
Zen Mod is offline Zen Mod  Serbia
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they're certainly especially good for the money , if you're buying them in PL/FW quantity
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Old 17th November 2012, 02:32 PM   #2846
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thank you generg
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Old 17th November 2012, 03:29 PM   #2847
generg is offline generg  Germany
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Originally Posted by Zen Mod View Post
they're certainly especially good for the money , if you're buying them in PL/FW quantity

o.k. I understand!

for me impossible.....

price is high, that is o.k., but postal fees too hard!
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Old 17th November 2012, 03:59 PM   #2848
Zen Mod is offline Zen Mod  Serbia
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as I wrote few times already - I'm having 20km away from me , xformer vendor with exquisite quality ; when I say that I need xformmer for audio , especially for A class ..... man knows his drek

so - it's completely logical that you're having the same in Germany , one ring or e-mail away ....

recently I reworked one F4 , made by local guy for another guy , in my Babelfish J ;

when I was told that big donut (in amp ) is all away "from Germany !!" ( well ,special quality , not being locally made ) I just couldn't stop laughing ...........


ook me , I am a blind , but not so much that someone can sell me ********* for ********* , teling how grass is always greener on other side of yard fence
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Last edited by Zen Mod; 17th November 2012 at 04:03 PM.
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Old 17th November 2012, 06:14 PM   #2849
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In Europe Amplimo xformers are as good as Plitron.
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Old 17th November 2012, 06:15 PM   #2850
alex mm is offline alex mm  Europe
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Default PCB F6 audio amplifier

........ my contribution single side PCB
Regards Alex.
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