**We're on round #4!!!**
***** This board will have two holes for options on switching the bypass resistors between Bourn/Comoco.
Gen1 w/comoco's
Here's how it is different in settling time from the original.
Here's a comparison between resonances.
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: $8 US, priority USPS box
$15 CAD
$16 General international padded envelope
If ordering over 4x boards there may be an additional $10, depending on destination.
Need 32 filter board commitments to order.
Pictures of Enclosure:
If people want I need 10 commitments. We have one to start with. They are $200. They’re really nice, and won’t come with those markings since everyone will do their own combo of filters. They are aluminum, and powder coated.
***** This board will have two holes for options on switching the bypass resistors between Bourn/Comoco.
Gen1 w/comoco's
Here's how it is different in settling time from the original.
Here's a comparison between resonances.
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: $8 US, priority USPS box
$15 CAD
$16 General international padded envelope
If ordering over 4x boards there may be an additional $10, depending on destination.
Need 32 filter board commitments to order.
Pictures of Enclosure:
If people want I need 10 commitments. We have one to start with. They are $200. They’re really nice, and won’t come with those markings since everyone will do their own combo of filters. They are aluminum, and powder coated.
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That enclosure looks really nice, and I love those receptacles. What are they? Are they brass or copper with gold plating?
They are Hubbells. They are brass (which is copper and sinc). Pure copper is only available from specialized companies. I am not a fan of super special sockets, they sound different but not actually better.
Yes, of course. Do you want them early? If not just remind me when making payment for the Fo-Felix so I can package everything together.
Help Needed
I have bought the boards from GB #3 and finally assembled the boards into a metal casing.
I used the light bulb mains test to power up the unit and the bulb never dim. I assume that there should be a minimal current draw if its working correct but the bulb was as bright as it can be. So it seems that there is something wrong with my setup. Can someone with a working unit confirm that?
Are the Comocos directional? I assume that they are not.
I did solder the bypass resistor on the back of the PCB as shown in #117.
So I have 2: one for the other non-fused side and the one on the back is on the back of the PCB.
I have bought the boards from GB #3 and finally assembled the boards into a metal casing.
I used the light bulb mains test to power up the unit and the bulb never dim. I assume that there should be a minimal current draw if its working correct but the bulb was as bright as it can be. So it seems that there is something wrong with my setup. Can someone with a working unit confirm that?
Are the Comocos directional? I assume that they are not.
I did solder the bypass resistor on the back of the PCB as shown in #117.
So I have 2: one for the other non-fused side and the one on the back is on the back of the PCB.
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Can you measure the DC resistance on one of the boards, without anything connected, from the input?
Comocos are not directional.
The draw on a board may only be something like 90mA.
Comocos are not directional.
The draw on a board may only be something like 90mA.
I will do that later but need to decouple the wiring from the 2 boards. What is the expected DC resistance?
Have the 2 boards connected in parallel, I have the DC resistance of 55.5k ohm at the input. Is that correct?
Ok, we have a 110K resistor across the L and N and if I have 2 boards in parallel, it will be a combined of ~55 Kohms. Assuming if it draws 90mA, wouldn't the power dissipation be huge on these 2 resistors?
As long as your resistors are in the K range, everything seems fine.
The thing about capacitors is they release the energy they store. So the loss is very small, even if there is some current use.
Looks like we hit 32. I am going to wait a little bit before collecting, as there’s always someone else interested that misses the initial. But I always print more than the GB amount needed, so there’s more after the first contributors - but people often don’t think so.
What is the purpose of having the 110K resistor across the L and N? Also, isnt 1W low given its across the mains inputs?
It’s to discharge the capacitors whenever you disconnect the device. Otherwise they can hold a bit of a snap for you. If you have 8 Fo-Felix’s it’s a pretty good snap. Wattage was calculated. 110k is pretty high resistance.
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