Digitech rotary encoder

[Mick Bailey]

Does anyone have the ALPS part number for the encoders used in the Digitech RP1000?

[Jazz P Bass]

Have you tried contacting Digitech?

They have always been helpful to me in the past.

[Enzo]

Alps part numbers are just numerical descriptions, similar to Accutronics reverb pan numbers in a way. The various numbers in the part number mean size, shaft dimension and shape, number of poles, number of steps, detent or no detent, bushing or no bushing, etc.

Encoders come in absoslute position and relative position. Absolute just means if you aim it at due east it will always indicate the direction, while the alternative is just an encoder that increments or decrements continuously as you rotate. And there are things like grey code, which differs from straight binary.

I suspect your encoder is the most basic type of continuous encoding. In other words you rotate the control as many times as it takes to increment the display number to the place you want. (In contrast to each position means something defined like an actual rotary selector) Determine if the existing encoder has 12,24,36 or some other number of steps around the 360 degree turn. And are those each a different code or does it have say three detents per electrical position. And of course shaft description. Some even include push switch action.

Here is a typical lineup of 12mm size:
EC12 Series - Products Line

It may be an ALps, but the varius brands are made the same way, so you may find an Alpha or Panasonic that will drop in. Mouser has a reasonably good selection, and even if you do not order from them, at least you might identify what you want.

[Mick Bailey]

Thanks for that. I've narrowed it down to EC12E2420801 from the link just a basic 24-step type. And cheap - even in the UK. Will double-check with Digitech but I'm pretty sure that's the right one.

[doctor]

Thanks for that. I've narrowed it down to EC12E2420801 from the link just a basic 24-step type. And cheap - even in the UK. Will double-check with Digitech but I'm pretty sure that's the right one.

The RP-1000 has 6 encoders of 2 types:

1. P/n 44-0200 (encoder +switch, 22mm, D-shaft, 30 pos, vert.) - Tone Library.
2. P/n 44-0352 (encoder, 13 mm, 24 Dnt, Rot 200mm, D-shaft, vert) - FX Library,
Amp Gain, FX Mix, Master Level, Amp Level.

Digitech does not provide the manufacturer’s part numbers, only in-house part numbers
and short description.

You can try to order from Digitech’s distributor needed encoder in accordance with its part number, or try to define needed replacement in accordance with provided information.

[Mick Bailey]

I just got a reply back from Digitech confirming the same - only in-house part numbers available.

[Mick Bailey]

Just to update this thread;

Alps part EC12E2420801 is the exact replacement for the 5 'plain' rotary encoders. Fitted and tested.

[Burgomatic]

Looking for a rotary encoder for a ValveFX, but I don't wanna pay $60 for a Digitech rebranded one that obviously is an ordinary ALPS or Alpha part.
Does anyone know where to find it?
OR....does anyone have a tip for a replacement that can be wired (hacked) onto the main board?

[The Dude]

Are there any numbers on the encoder itself?