Poultrygeist
Lunatic Member
or amazon
Ksmile® 5 x Male + 5 x Female 2.1x5.5mm
Ksmile® 5 x Male + 5 x Female 2.1x5.5mm
Last edited:
As good as the FX sounded with it's tiny wall wart I was skeptical there was any room for further improvement using a better power supply. Wrong!
View attachment 1352778
Keep it as close to the 12.6 V rating of the two tube heaters in series as possible. Running it substantially higher will shift operating points away from design parameters and shorten tube life. Also, some possible negative effects for the on-board voltage convertor.the consensus is that a linear power supply is the way to go, but what about the internal power supply that supplies the voltage to the tubes?
has anyone tried removing that & replacing it with a linear one?
obviously. the linear power supplies will cost way more than the pre amp, but maybe it's worth it?
also, does anyone know how high we can go above the 12v? 14.5 maybe?
If the switcher is designed and built properly; you don't really hear much difference. It is entirely possible to produce a SMPS supply that has a very clean DC output for audible use. My DAC came with a small switching brick; I swapped that out to a linear wall-wart; but I also powered it from the Alinco SMPS I *normally* use for my ham radio equipment. It's technically a 13.8v 32A supply...but the voltage is adjustable from 0 up to 16. Anyway, I ran the DAC on the Alinco supply and couldn't hear a difference between it and the wall-wart. If anything I think the SMPS made things sound a little bit better due to the more stable voltage supply on current demand.
how do you know it is 45v?found a dilvpoetry pre-amp that uses the same board as the fx-audio the main difference is that instead of +/- 30 volts to the tubes, it has a different internal power supply that is +/- 45 volts
i tried to create an album so that i could show some pics, but was unsuccessful
some of the components on the board are different values, but i think that is due to the different voltages that the 6j1 is running at, & the film caps are different & the dilvpoetry doesn't have the ferrite on the bottom that the fx does
need to do some head to head comparisons to determine how the sound compares between the 2
i picked the dilvpoetry up used on amazon for about $20 ordered another
found a dilvpoetry pre-amp that uses the same board as the fx-audio the main difference is that instead of +/- 30 volts to the tubes, it has a different internal power supply that is +/- 45 volts
i tried to create an album so that i could show some pics, but was unsuccessful
some of the components on the board are different values, but i think that is due to the different voltages that the 6j1 is running at, & the film caps are different & the dilvpoetry doesn't have the ferrite on the bottom that the fx does
need to do some head to head comparisons to determine how the sound compares between the 2
i picked the dilvpoetry up used on amazon for about $20 ordered another