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Title: 100R resistor on normal channel's tone to ground bus Post by: hvrock13 on July 26, 2010, 03:28:01 PM I just finished everything on my 18 watt TMB head, but one part of the layout confused me. On the normal channel, it shows a 100R resistor from the tone pot's middle prong to the ground bus. I have one left over resistor, but it doesn't look like a 100R. The rest of the resistors I double checked and they are all in their right places. What should I do? Is it okay to just leave out that resistor and just use a wire from that prong to the ground bus? I could go out and buy a resistor if it's needed though.
Oh and I was wondering, nik sent me a schematic similar to his layout but he said it wasn't the exact same, but could help a little. It doesn't show the diodes and the capacitor on the tube rectifier, but the layout on the ceriatone page for this amp does show them. Is it best I leave them in? I'm new to all this.. First diy amp and I'm building with my dad. Title: Re: 100R resistor on normal channel's tone to ground bus Post by: flight on August 12, 2010, 07:37:10 PM You can leave it out to get it up and running
I think it has something to do with the pots taper? Edit: never read the post so it was flagged as 'new' :o Title: Re: 100R resistor on normal channel's tone to ground bus Post by: Kitarist on August 23, 2010, 04:33:14 PM Yea the guy probably figured it out already :D :D
Title: Re: 100R resistor on normal channel's tone to ground bus Post by: arledgesc on November 08, 2010, 02:47:03 PM Without the 100 ohm resistor dialing the tone control all the way counterclockwise would shunt all the signal from this channel to directly to ground. And you would get little or no output. Addition of the resistor is meant to be a lower limit stop and prevent totally killing the channel when adjusting tone on the low end.
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