I'm too excited about F8 to put anything in front, although 4 or so parts boxes are available! Really liking the Square law output amps and I can't wait to get XA252 back in rotation!
for ZM, speaking of dual mono:
300VA, dual 18Vac, ((33mF-0R1/5W (or shown choke)-33mF) then Icar/Ducati 50uF) per rail
that's just right
more, the merrier
overkill is good for Soul
300VA, dual 18Vac, ((33mF-0R1/5W (or shown choke)-33mF) then Icar/Ducati 50uF) per rail
that's just right
more, the merrier
overkill is good for Soul
Overkill is good 
I can't find this choke from Hammond, but something similar from Monacor: 4.7 mH, 7.9 A, 0.14 ohms.
Officially it is for xovers, but...
Could it work?
I can't find this choke from Hammond, but something similar from Monacor: 4.7 mH, 7.9 A, 0.14 ohms.
Officially it is for xovers, but...
Could it work?
For CLC I don't think 4.7mH is the critical value.
To quote MZM from another thread: "take choke between 4mH and 10mH, no more than 0R33 of Rdc, toss it in place of R in your CRC"
DCR is very important, current handling is important.
Have you had the chance to play around in PSU II and model CRC vs CLC, cap sizes, etc? Download PSU II here: https://www.duncanamps.com/psud2/
To quote MZM from another thread: "take choke between 4mH and 10mH, no more than 0R33 of Rdc, toss it in place of R in your CRC"
DCR is very important, current handling is important.
Have you had the chance to play around in PSU II and model CRC vs CLC, cap sizes, etc? Download PSU II here: https://www.duncanamps.com/psud2/
Here are 2 quick & dirty PSU II examples showing CRC and CLC for one rail at constant 1.7A constant current (Class A amp).
The CRC is assuming 0R11 (figure parallel 0R33 x3), and CLC is using the Hammond 159ZJ at 10mH / 0R16 DCR.
The absolute voltage value is off, and that's OK. We know you'll end up in the 22-23V range. The donut resistance is a guess, but close enough for this exercise.
The key thing I look for is the ripple at C2 or I1, and that's shown in the "Diff" column. Compare CRC at 69mV vs CLC 1.7mV ripple. Those numbers give you a relative idea of the difference between the R & L. You can play around with different values to see the relative impact of your choices. Does it make sense to spend more on bigger / more caps? Different choke? CRCRC? CLCRC? CRCLC? What is the right bang for buck ratio for your amp AND your wallet? This tool lets you play with those scenarios and make the decision.
The CRC is assuming 0R11 (figure parallel 0R33 x3), and CLC is using the Hammond 159ZJ at 10mH / 0R16 DCR.
The absolute voltage value is off, and that's OK. We know you'll end up in the 22-23V range. The donut resistance is a guess, but close enough for this exercise.
The key thing I look for is the ripple at C2 or I1, and that's shown in the "Diff" column. Compare CRC at 69mV vs CLC 1.7mV ripple. Those numbers give you a relative idea of the difference between the R & L. You can play around with different values to see the relative impact of your choices. Does it make sense to spend more on bigger / more caps? Different choke? CRCRC? CLCRC? CRCLC? What is the right bang for buck ratio for your amp AND your wallet? This tool lets you play with those scenarios and make the decision.
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