Fender Stage 185 input jack

[Axtman]

Will this 1/4 inch switching jack work for an input to a Fender Stage 185? Please compare the link spec sheet with the amplifier schematic.

If this part does not work, where can I find a new switching jack.

Thanks!

https://www.tubesandmore.com/products/S-H507

[Enzo]

Does yours look like the picture? If so, buy it.

[Axtman]

Thanks Enzo for your reply. Yes the broken jack looks like the one pictured. My concern is the jack schematic does not look like the amp schematic.

[52 Bill]

Thanks Enzo for your reply. Yes the broken jack looks like the one pictured. My concern is the jack schematic does not look like the amp schematic.
[ATTACH=CONFIG]38882[/ATTACH][ATTACH=CONFIG]38883[/ATTACH]

The two jacks are the same, the schematic drawings are just different.

Fender has used that style of jack for the past 20 years or so. There is a mono and a stereo version. The 9 pin one is the stereo and is used on a lot of different models.

[Enzo]

What's different? They look the same to me. Pins 2 and 3 are the tip and ring in both, and 1 is the sleeve/ground. then the isolated contacts are two SPDT contact sets. Pin 5 is NC to 4 and NO t0 6 in both, and then pin 8 is NC to 7 and NO to 9 in both. All same. Just because they rearranged them on the page means nothing.

[Axtman]

Enzo,

Upon further inspection it looks like the only difference is the new jack switches all the contacts on the ring (pin 3) of the plug whereas the existing jack switches the contacts at the ring (pin 3) and the tip (pin 2) of the plug. Both jacks do the same thing when the plug is fully inserted. Thanks!

[g1]

That appears to be a typo. The Fender drawing appears to be the correct one. You can verify by resistance measurements on the new jack, but it doesn't really make a difference anyway.
One set of switch contacts should be activated by the tip, the other set of switch contacts should be activated by the ring.

[Enzo]

It is never intended that one insert a plug half way, so it is moot whether all the extra contacts are activated by tip or ring or both. Plug in and all are activated. That is all that matters.

[Enzo]

I agree the Fender drawing probably is more accurate in the mechanical representation, but the drawing with the part is a schematic representation of its function, which is correct.

[g1]

This is maybe a better representation of the mechanical function. Ignore the numbers as it is a different part. We don't really know where the actuators are without looking inside the jack. They may even both be activated by the sleeve. It should not matter.

[Axtman]

My initial concern was the circuit needed to have contacts made in a certain order as the plug was inserted i.e. "make before break". You guys have convinced me otherwise. Thanks!

[g1]

No, there is no "make before break" or vice versa to worry about.
I looked closer at one and both switch actuators are activated by the tip. They sit in the groove of the tip, so they are not only actuating the switch, but also locking the plug in place so it doesn't pop out of the jack.
There. Some jack trivia.

[Enzo]

This is classic overthinking. We have a Fender amp with a broken jack, we have the Fender replacement jack available online. Stop right there, the solution is at hand.

[g1]

It's just a discussion about jack minutia. I meant no harm and no jacks were harmed in the process . The autopsy was performed on a cadaver jack.

[Axtman]

Thanks for everyone's help. I replaced all the jacks on this amp. What they heck they were cheap and replacement was easy to do. (I also replaced a few broken pots and that stupid ribbon cable.) The amp works great and actually sounds pretty good. It is, however, LOUD!