Quote from: joecool85 on December 30, 2010, 11:55:33 AM

Quote from: eyeball226 on December 30, 2010, 10:59:16 AM
I probably won't seek out the exact jack now I know what the functionality is and how easy it is to replicate, thanks though!

Good luck and let us know how it comes out.

It was so long before I got round to fixing the amp that I forgot about this. I attached it by wires rather than trying to mount it directly on the board (which is a stupid design really) and it's been working fine for a few months now. Thanks for all the help!

Quote from: bry melvin on December 29, 2010, 05:52:47 PM
antique radio supply (tubesandmore.com) has the fender jacks.  

I've gotten them from Mouser too...but they of course list them by the manufacturer.

Can't find the old invoice...but think it's one of the Kobiconn ones at mouser...you might need to check a couple of data sheets

I probably won't seek out the exact jack now I know what the functionality is and how easy it is to replicate, thanks though!

TBH, I'll probably just buy a normal mono switching jack. Now I know that it's just earthing the input and nothing special I know what to do.

It's an SP-10, one of these:


I'm guessing the input is grounded when there's no plug in it so it doesn't hum.

Quote from: joecool85 on December 29, 2010, 01:27:29 PM

Quote from: eyeball226 on December 29, 2010, 01:03:08 PM
I'm not actually sure what it's doing, I don't really understand the whole circuit but I'd guess it's earthing the input. What would be a regular switched jack by the way? The kind in the diagram on the Neutrik website?

Yes, I was referring to a jack like the mono switched neutrik you had the link for.

What type of amplifier is this?  Maybe you (or someone here) can find a schematic and we can tell you if you even need the switched portion of that jack/what it is for.

I've just had a look at the circuit and actually it's ridiculously simple: One of half of the switch is connected to ground and the other half is connected to the input. I'm a moron! I'm pretty sure the neutrik one would do the job fine, all I'd have to do is connect TN and SN together.

EDIT: To answer your question, it's just a little Squier transistor amp. Thanks for your help!

Quote from: joecool85 on December 29, 2010, 12:57:32 PM
What does the SPST switch do on this jack?  I've not heard of a jack like you're asking for, but you could always use a regular switched jack and have the switched portion operate a SPST relay.

I'm not actually sure what it's doing, I don't really understand the whole circuit but I'd guess it's earthing the input. What would be a regular switched jack by the way? The kind in the diagram on the Neutrik website?

I primarily joined this forum just to ask this question, sorry if that's frowned upon. Anyway... I'm trying to repair a little practice amp which has a broken input jack, but I'm having trouble finding a replacement. It's a 1/4" mono switching jack with a SPST push to break switch that's operated by the jack being inserted. The switch is completely electrically separate from the jack contacts and this is the problem. All of the switching jacks I can find connect the tip and sleeve to other contacts when the jack is removed.

I made a bad diagram in MS paint showing how this socket is:


Can someone help me find another one of these (preferably more robust though  ) or even just point me in the right direction with something to google? I've tried lots of different searches and only found things like the 'mono switched' in this diagram: http://www.neutrik.com/content/technicalsupport/faq.aspx?faqId=205_747846926.