This is my first pcb pretty much. Hoping to get some comments and criticisms. My main question TBD is the hammond case has a pc slot that looks tb 2mm but i dont want to pay for 2mm board right now. Will i get proper bonding between exposed copper and hammond pc slot with 1.6mm thick board?
Gerbers attached
Schematic Attached (PLLXO SCH>PDF)
Not sure how to share kicad project but i would be happy to
A chart at this sight is helpful for choosing values
http://www.troelsgravesen.dk/High-Pass-Filter.htm
Purpose
-Rca to Xlr with filter for SE source to Hypex amp
-First order high pass filters (capacitors in series array using dip sw) x12 position for both pos and neg
-General attenuation I.e. Dac--Resistor in series---amp (resistor in series array using dip sw) x12 position for both pos and neg
-voltage divider (example use case, drop dac output to just use the upper end of dac volume cntrl)
-Resistors to ground array using dip sw x12 position for both pos and neg
-Splitter if you want to to 1 xlr/rca in ---2 xlr/rca out
-Avoid buying vandersteen HPA for a pair of speakers i have
Profile
-I think i made it to slot into Hammond 1455N1601 160mm/103mm
-Height will depend on connectors and caps but the 53mm should work just fine for most everything
TO DO front and rear panel cutout sheet
to save money on build
- use jumper wire instead of dip sw
-only install a few cap/res that you know you need (or clean your floor)
-cardboard enclosure
Resistor package imp0805 metric2012
Cap footprint various from 5mm to 30ish lead spacing
Looking like an all out build with basic caps and res will be approx $200 for a pair Ie Left/Right
Gerbers attached
Schematic Attached (PLLXO SCH>PDF)
Not sure how to share kicad project but i would be happy to
A chart at this sight is helpful for choosing values
http://www.troelsgravesen.dk/High-Pass-Filter.htm
Purpose
-Rca to Xlr with filter for SE source to Hypex amp
-First order high pass filters (capacitors in series array using dip sw) x12 position for both pos and neg
-General attenuation I.e. Dac--Resistor in series---amp (resistor in series array using dip sw) x12 position for both pos and neg
-voltage divider (example use case, drop dac output to just use the upper end of dac volume cntrl)
-Resistors to ground array using dip sw x12 position for both pos and neg
-Splitter if you want to to 1 xlr/rca in ---2 xlr/rca out
-Avoid buying vandersteen HPA for a pair of speakers i have
Profile
-I think i made it to slot into Hammond 1455N1601 160mm/103mm
-Height will depend on connectors and caps but the 53mm should work just fine for most everything
TO DO front and rear panel cutout sheet
to save money on build
- use jumper wire instead of dip sw
-only install a few cap/res that you know you need (or clean your floor)
-cardboard enclosure
Resistor package imp0805 metric2012
Cap footprint various from 5mm to 30ish lead spacing
Looking like an all out build with basic caps and res will be approx $200 for a pair Ie Left/Right
Attachments
Last edited:
I updated to a new schematic that allows for voltage divider for the attenuation. L or pi i think though i don't actually know the effect difference.
Hello, thanks for this, this looks awesome and useful!
I'd like to build a balanced 2 way 6db crossover that crosses at 1.5khz and attenuates the tweeter 15db relative to the woofer.
The only other item I'd need is a +9db low shelf to ~160hz either before the cross or in the low pass circuit.
Might that be possible with the design above? assuming I can use the dips to set the xo frequency and the attenuation? Seems I'll have to figure out how to add a low shelf in pllxo, but looking into that now. May be able to use my pre-amps single ended EQ loop, if that's easier.
Currently using a dsp to accomplish this and wanted to try a pllxo since I assumed that should be a simple circuit and I'm trying to get the dsp's a/d d/a conversion out of my system.
output of pre-amp is 600ohms and either DC or cap coupled (pre has 2 sets of outs)
input to amps are both listed as 47kOhms and both are voltage driven amps.
I'd like to build a balanced 2 way 6db crossover that crosses at 1.5khz and attenuates the tweeter 15db relative to the woofer.
The only other item I'd need is a +9db low shelf to ~160hz either before the cross or in the low pass circuit.
Might that be possible with the design above? assuming I can use the dips to set the xo frequency and the attenuation? Seems I'll have to figure out how to add a low shelf in pllxo, but looking into that now. May be able to use my pre-amps single ended EQ loop, if that's easier.
Currently using a dsp to accomplish this and wanted to try a pllxo since I assumed that should be a simple circuit and I'm trying to get the dsp's a/d d/a conversion out of my system.
output of pre-amp is 600ohms and either DC or cap coupled (pre has 2 sets of outs)
input to amps are both listed as 47kOhms and both are voltage driven amps.