Thanks Peter 😎
BTW Woodturner-Fran
http://www.htforum.nl/yabbse/index.php?topic=76211.1400
Slightly better quality pics....on the dutch forum
BTW Woodturner-Fran
http://www.htforum.nl/yabbse/index.php?topic=76211.1400
Slightly better quality pics....on the dutch forum
Fajnie z jego strony, kulturalny facet z tego Holendra i jaki pomyslowy, wlasnie sobie poprzegladalem, co on tam wykombinowal:
HELP......
HELP......
BMW850 said:
Is there a scematic for a PSU for the shigaclone (trying to use the search function, but it only directs me to complete thread and not the post where it is mentioned?)?
You use a 2x12VAC transformer or a 2x9VAC transformer (rectified to ~12v)?
attached is one of Audio1st's fine schematics which I'm sure he won't mind me posting.
this is the method that most folk have used - using a CT secondary and only 2 diodes.
So far as the transformer secondary is concerned - it's not too important whether you use 0-9 0-9 or 0-12 0-12. Provided you connect it CT and there is enough headroom for the 7808 to work correctly.
I use a 0-7.5 0-7.5 traffo - this gives me 11.3V dc once rectified and smoothed at the input of the 7808 - enough for the regulator to reliably generate 8v. I personally wouldn't go below that.
The higher the input voltage to the regulator the hotter it's going to get - mine just about gets warm.
this is the method that most folk have used - using a CT secondary and only 2 diodes.
So far as the transformer secondary is concerned - it's not too important whether you use 0-9 0-9 or 0-12 0-12. Provided you connect it CT and there is enough headroom for the 7808 to work correctly.
I use a 0-7.5 0-7.5 traffo - this gives me 11.3V dc once rectified and smoothed at the input of the 7808 - enough for the regulator to reliably generate 8v. I personally wouldn't go below that.
The higher the input voltage to the regulator the hotter it's going to get - mine just about gets warm.
Attachments
Erik van Voorst said:Fajnie z jego strony, kulturalny facet z tego Holendra i jaki pomyslowy, wlasnie sobie poprzegladalem, co on tam wykombinowal:
HELP......
nothing wrong: 🙂
"That's great from his (Erik) side, he's very well-behaving and ingenious this Dutchman; I've just reviewed what he (Erik) has constructed.."
Thanks...!!!
I sometimes wonder why after all this time we still cannot agree to speak ONE LANGUAGE...besides music that is...😀
I sometimes wonder why after all this time we still cannot agree to speak ONE LANGUAGE...besides music that is...😀
Erik,
how your ALWSRs are performing? did you mode them with girator to improve hf performance? I've found them (without mode) worst comparing to single LT1086 or 1117 being soldered directly to the PCB - one for LC and two for LA.
Andy
how your ALWSRs are performing? did you mode them with girator to improve hf performance? I've found them (without mode) worst comparing to single LT1086 or 1117 being soldered directly to the PCB - one for LC and two for LA.
Andy
I did not modify the super regs....mind you there must NOT be an elco after the super reg....
I use the Andrew Super Reg after the Peter Daniel Regulation and it was clearly an extra improvement...more body and much more quiet presentation than before.
I am a bit surprised to hear your results...
It seems that you can modify the super reg with an 0.01 cap and (10 ohm?) resistor in serie...I believe between "op1" and sense 0V )....out of my head....
ALSWR has the elco's on the supregboard chosen for technical reasons so NOT how it sounds...so you can do some cap-rolling...😀
I use the Andrew Super Reg after the Peter Daniel Regulation and it was clearly an extra improvement...more body and much more quiet presentation than before.
I am a bit surprised to hear your results...
It seems that you can modify the super reg with an 0.01 cap and (10 ohm?) resistor in serie...I believe between "op1" and sense 0V )....out of my head....
ALSWR has the elco's on the supregboard chosen for technical reasons so NOT how it sounds...so you can do some cap-rolling...😀
herewegoagain said:
Rule of thumb with 78xx/79xx voltage regulators:
Vin-Vout = 3V min. to get good regulation. More will not necessarily lead to better regulation but it will lead to more heat.
herewegoagain said:
Thank you 🙂
Not sure about abbreviations, what does CT mean?
So I can use a 80VA 0-12 0-12 VAC trafo without problems using your attached schematic?
Kind regards
yep you can use that - to use that schematic you must connect it as a CT (centre tapped) transformer - ie. the middle 2 tappings connected together to make the centre tapping.
Erik: if you are still reading this thread (!)😀
Can you tell us what weight you have on your laser sled (hanging from the crane)?
I have about 5g there now and I can't hear any difference
Fran
Can you tell us what weight you have on your laser sled (hanging from the crane)?
I have about 5g there now and I can't hear any difference
Fran
About 1 gram...🙂
A good try out is attaching say 10 grams and listen...while somebody lifts the weight....you immediately should notice the difference ...pay extra attention to the lower registers...succes!!
A good try out is attaching say 10 grams and listen...while somebody lifts the weight....you immediately should notice the difference ...pay extra attention to the lower registers...succes!!
i must say Erik - CONGRATULATIONS....!!!!
big project finished for you...
i am still strugling with mine...
i have made another power supply....
it is using a transformer that has 12V at the output, diode gretz using 4 diodes MR914, one Black Gate standard 1000uF/25V in parallel with 4.7uF/50V Black Gate N series, than 7808 regulator from OnSemi, another 1000uF/25V standard BG and another one in it's parallel that is 4.7uF/50V N series....
also - another mod is putting the transport on the copper plates - that are 10mm thick....
well - i am still using analogue output since i do not have a dac right now - but i am not that happy with the result - it seems to me that the original psu and the transport on 10mm mdf were sounding better... crazy - right?!
....
i am waitin for Black Gates to burn in and i am open for suggestions if somebody might have one... but right now i am not that happy with the sound - my BG's are arround 50 hours burned in....
big project finished for you...
i am still strugling with mine...
i have made another power supply....
it is using a transformer that has 12V at the output, diode gretz using 4 diodes MR914, one Black Gate standard 1000uF/25V in parallel with 4.7uF/50V Black Gate N series, than 7808 regulator from OnSemi, another 1000uF/25V standard BG and another one in it's parallel that is 4.7uF/50V N series....
also - another mod is putting the transport on the copper plates - that are 10mm thick....
well - i am still using analogue output since i do not have a dac right now - but i am not that happy with the result - it seems to me that the original psu and the transport on 10mm mdf were sounding better... crazy - right?!
....
i am waitin for Black Gates to burn in and i am open for suggestions if somebody might have one... but right now i am not that happy with the sound - my BG's are arround 50 hours burned in....
it seems that hte transport is working better when i put it together with the copper onto the foam material that is being used in bathrooms to walk on....
but also the power supply seems not to be that good... oh man ... i am not sure.... those BG's are not fully burned in...
but also the power supply seems not to be that good... oh man ... i am not sure.... those BG's are not fully burned in...