Author Topic: VFE Switching Board - questions while building  (Read 378 times)

mark123

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VFE Switching Board - questions while building
« on: November 18, 2017, 11:55:21 AM »
I have a 1/2W 1k resistor near the Zener and the other 1k resistor in the schematic comes off the switch on the silkscreen it's marked P1k but I'm not familiar with the P.  What does it mean?
« Last Edit: November 18, 2017, 12:08:45 PM by mark123 »

hasanova

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Re: VFE Switching Board - questions while building
« Reply #1 on: November 18, 2017, 01:36:58 PM »
I guess, P stands for "Power", it's a power/ current resistor?

somnif

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Re: VFE Switching Board - questions while building
« Reply #2 on: November 18, 2017, 01:53:04 PM »
I guess, P stands for "Power", it's a power/ current resistor?

Pretty much this. Its a 1/2W resistor in a 1/8W size form factor. Its acting as a power resistor (designed to stay cool while having lots of power running through it).

mark123

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Re: VFE Switching Board - questions while building
« Reply #3 on: November 18, 2017, 06:30:09 PM »
Thanks for the info. Is this common?
« Last Edit: November 19, 2017, 05:23:01 AM by mark123 »

madbean

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Re: VFE Switching Board - questions while building
« Reply #4 on: November 23, 2017, 07:33:28 AM »
Thanks for the info. Is this common?

Peter suggests 1/2W for when and 18v power supply is used but so far all the VFE pedals I've seen are 9v only. A 1/4W is fine for all the VFE projects I've released so far and is actually what is recommended in the new switching board doc. There's no downside to using 1/2W (the upside being better current handling and slightly less noise prone), though. It's just less commonly used in pedals.
I own madbeanpedals (duh). I am part owner of Function F(X).

mark123

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Re: VFE Switching Board - questions while building
« Reply #5 on: November 23, 2017, 11:37:09 AM »
Thanks for the info. Is this common?

Peter suggests 1/2W for when and 18v power supply is used but so far all the VFE pedals I've seen are 9v only. A 1/4W is fine for all the VFE projects I've released so far and is actually what is recommended in the new switching board doc. There's no downside to using 1/2W (the upside being better current handling and slightly less noise prone), though. It's just less commonly used in pedals.
Thanks.

Is using the P in the P1K have any significance to anyone other than VFE?

madbean

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Re: VFE Switching Board - questions while building
« Reply #6 on: November 23, 2017, 11:39:03 AM »
Thanks for the info. Is this common?

Peter suggests 1/2W for when and 18v power supply is used but so far all the VFE pedals I've seen are 9v only. A 1/4W is fine for all the VFE projects I've released so far and is actually what is recommended in the new switching board doc. There's no downside to using 1/2W (the upside being better current handling and slightly less noise prone), though. It's just less commonly used in pedals.
Thanks.

Is using the P in the P1K have any significance to anyone other than VFE?

Not AFAIK. I'm sure he used "P" to designate the 1/2W in that position as opposed to the other 1k resistor on the board which is 1/8W.
I own madbeanpedals (duh). I am part owner of Function F(X).

mark123

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Re: VFE Switching Board - questions while building
« Reply #7 on: November 23, 2017, 11:47:19 AM »
Cool thanks.  :)