Hello everyone,
I am about to start building a Fender Deluxe Reverb clone.
I'm almost done with the BoM now, and I have doubts about the potentiometers.
Here's what's listed in the official manual :
According to the classic potentiometers nomenclature, ie A=log, B=linear and C=reverse log, R7,8,10,22,19,20 are log potentiometers, R31 is a linear potentiometer and R42,48 are reverse log potentiometers. Am I ok?
But, there's still a number that I don't know the meaning of. What do 30A, 10A, 30C or 10C mean? Is that the tolerance?
If I'm asking it is just because I found the genuine potentiometers quite expensive. So I would like to use those :
Would my idea be possible?
Thanks in advance.
I am about to start building a Fender Deluxe Reverb clone.
I'm almost done with the BoM now, and I have doubts about the potentiometers.
Here's what's listed in the official manual :
- R10,22 : CONTROL SNAPIN 1 MEG 30A J TAPER (Volume pot)
- R7,19 : CONTROL SNAPIN 250K 30A J TAPER (Treble pot)
- R8,20 : CONTROL SNAPIN 250K 10A AUDIO (Bass pot)
- R31 : CONTROL SNAPIN 100K B (Reverb pot)
- R42 : CONTROL SNAPIN 3 MEG 10C AUDIO (Speed pot)
- R48 : CONTROL SNAPIN 50K 30C REV AUDIO (Intensity pot)
According to the classic potentiometers nomenclature, ie A=log, B=linear and C=reverse log, R7,8,10,22,19,20 are log potentiometers, R31 is a linear potentiometer and R42,48 are reverse log potentiometers. Am I ok?
But, there's still a number that I don't know the meaning of. What do 30A, 10A, 30C or 10C mean? Is that the tolerance?
If I'm asking it is just because I found the genuine potentiometers quite expensive. So I would like to use those :
- R10,22 : ALPHA 1MEG log(Volume pot)
- R7,19 : ALPHA 250K log (Treble pot)
- R8,20 : ALPHA 250K log (Bass pot)
- R31 : ALPHA 100K lin (Reverb pot)
- R42 : I haven't found any replacement so far (Speed pot)
- R48 : ALPHA 50K reverse log (Intensity pot)
Would my idea be possible?
Thanks in advance.
Pots are pots, so the only reason to get the original part is to fit the original chassis and board. If you are building a clone, all you need is the proper value.
The 10 or 30 on the audio taper refers to how steep the curve. 30 means 30% of total resistance at the mid point. 10 means 10%.
Of all the Deluxe Reverbs they have made, I am assuming you are cloning the '65 Reissue version?
Can't find a 3M pot? How about 4M or 5M? It is not critical, besides, most trems would be better if their range was moved a little slower.
Don't worry too much if your tapers are not the same. Amp makers love exaggerated volume tapers so the amp gets loud at a low setting. If it is this loud on 2 gosh how powerful this amp is. That is what they want customers to think. So you may find a milder taper is better anyway.
The 10 or 30 on the audio taper refers to how steep the curve. 30 means 30% of total resistance at the mid point. 10 means 10%.
Of all the Deluxe Reverbs they have made, I am assuming you are cloning the '65 Reissue version?
Can't find a 3M pot? How about 4M or 5M? It is not critical, besides, most trems would be better if their range was moved a little slower.
Don't worry too much if your tapers are not the same. Amp makers love exaggerated volume tapers so the amp gets loud at a low setting. If it is this loud on 2 gosh how powerful this amp is. That is what they want customers to think. So you may find a milder taper is better anyway.
Cool. That's what I though, but a confirmation is always welcome.
Enzo said:
Yes.
Enzo said:
So far I haven't found any more than 1MEG reverse log pot. I guess I'll just buy that one from Fender, and replace all the other ones.
Thank you very much.
Oh, don't sweat the taper. This is trem speed. If you are anything like me with regards to trem, most amps are too fast. The slow end is not slow enough, and by the time the speed is up to 3 or 4 it has gotten too fast to be useful. What if we replaced the 3M pot with a 1M pot and a 2M resistor? That might make the pot range more useful. I suspect a linear pot would probably work fine.
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