The Twin jack

[FlyingZ]

Where can I find a replacement female foot switch jack for a red knob twin?

The tip and ring are shorted when no jack is present.

Thanks

[Dagan8]

Here you go:

Fender Amp Parts

Part# 0025929000

[FlyingZ]

That part # is "Fender Mono Amp Jack" it looks identical

Is that not considered stereo because the tip and ring are switched?
Can I assume that they are switched? no data

Thanks again

[52 Bill]

The part number is correct and the jack is a mono 1/4" with normally closed switch. The switch is only on the tip contact.

If it was stereo, it would have a tip, ring, and sleeve like the 25931 jack listed below the mono one with 9 pins.

[Dagan8]

Yes. It is a mono jack. The red knob twin uses a mono jack for the Foot Switch Jack. The part # is in your attached part list.

[FlyingZ]

I am silly! I did not see that 0025929000 was 025929 lol

The cable is tip-ring-sleeve and that's exactly what the schematic shows:


I assume it's not called stereo because of the shunt
ty for the link and answers

[Dagan8]

If I remember correctly it's only tip and sleeve. No ring. I also have a Red Knob Twin and I had built a footswitch for it. It's a 2 button foot switch. It shunts half of the wave form to to ground depending on which switch is activated using the diodes. Or something like that.

[tboy]

The tip and ring are shorted when no jack is present.

The way that jack is drawn on the schematic, I can see how you might interpret it as tip and ring shorted together, but that interpretation is incorrect; it's really just a closed circuit mono (TS) jack.

[FlyingZ]

I must have the wrong cable. It's all good

[FlyingZ]

Edit again: So that diagram shows the sleeve is connected to ground when a jack is inserted? That's a 30v dead short then.

Should it have been this? It's a plastic jack

[Dagan8]

Actually there is a diode before the ground. This emulates the reverb switch on the FS. If there is no FS connected then reverb is default on.