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GB: Round #7; Fo-Felix AC Filter

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Destroyer OS

Destroyer OS

Member
Joined 2005
**We're on round #7!!!**

I've confirmed how to order parts, made sure it isn't an issue for Comocos. (please no more requesting samples)

So over the years people have asked about the old version, made by someone else.

It's probably time for an updated one. This one is a bit different. You may notice it does not have following capacitors after the choke. I have tried both ways, and my preference is strongly without the following X2 capacitors. Also the capacitors prior to the choke are not varied in size because overall capacitance is more important - and they won't randomly resonate with each other.

The other major change is the addition of bypass resistors for the chokes. These don't ruin the filtration, but they do a good job of quieting the chokes that can get excited by different combinations of things on the mains.
Click to expand...


Fo_Felix_R2_Public_preview2.png


Gen1 w/comoco's
IMG_1974_1_22.jpg


Here's how it is different in settling time from the original.
Fo_felix_vs_felix.png


Here's a comparison between resonances.
Fo_felix_vs_felix_resonance.png


*2oz copper PCB (1oz is standard)
*Weco 983ZD terminals, copper alloy and can accept 2 wires for daisy chain. These are also safer, particularly if you use solid core wire that otherwise likes to make cold solder joints you can't see.
*X2 rated capacitors for safety, 4x 0.47uf. They are alternated for CFC (capacitor field cancellation).
*Discharge resistor for X2 capacitors
*Coilcraft Comoco choke w/fuse or Bourns 8120/8121-RC choke w/o fuse & 15/16A/20A(*) max sockets
*Fuse clips are beryllium copper (good for 30A)
*120/230v operation (parts & pcb)
*Mounting holes are sized to work nicely with M3 screws and standoff kits
*Size: 2.25x4.25in
Click to expand...

The Weco 983ZD are preferred terminals, but not always available as individual sale. For this reason I'm going to include them in the price of PCB, so that I can meet min order requirements for them and save everyone the shipping.

Price: $13ea ($9 per filter board same as original, $2 per Weco, 2 needed per board)

Shipping: $9 US, priority USPS box
$16 CAD
$17 General international padded envelope (prices may vary due to a crazy world)

If ordering over 4x boards there may be an additional $10, depending on destination.

Need 32 filter board commitments to order.

lordvader 3
Knuds1 4
docjrev 6
Dadbeh 2
gary s 3
wirewiggler 3
JRKO 4
DaveM 4
rtate 3
mrloud 3
loWfi4evR 2
ccliu 2
sampsonite 6
pwagner 4
chiily 3
webber 4
skunark 4
turion64 3
32y0 4
jam econo 4
pistollero 4
jack_b 4
ericimage2 5
Chilkoot 4
dualuxe 1
Click to expand...
 
Last edited:
G

gary s

Member
Joined 2002
I will take 3 boards, thanks. I see the 2 way WECO terminals are not stock anywhere, so I assume you will have enough to supply with the boards at $2.00 each extra?

Also, as you have shown the layout of the pcb in post #1, is the mains input to the pcb on the left or right terminals?

Any preference on the caps, part number for 240VAC mains?
 
Last edited:
Destroyer OS

Destroyer OS

Member
Joined 2005
gary s said:
I will take 3 boards, thanks. I see the 2 way WECO terminals are not stock anywhere, so I assume you will have enough to supply with the boards at $2.00 each extra?

Also, as you have shown the layout of the pcb in post #1, is the mains input to the pcb on the left or right terminals?
Click to expand...

The WECO's are special ordered everytime. It takes a few weeks to get them.

Input is on the capacitor side. However you could reverse it if you wanted.
 
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