fleabag Posted June 9, 2021 Share Posted June 9, 2021 Anyone know what type of socket these are called ? Its the guitar input on a Markbass, and i need a replacement of something identical. It looks odd to me. Has 4 legs for soldering to PCB Quote Link to comment Share on other sites More sharing options...
bartelby Posted June 9, 2021 Share Posted June 9, 2021 Would this fit? https://www.neutrik.com/en/product/nmj4hfd2 Quote Link to comment Share on other sites More sharing options...
fleabag Posted June 9, 2021 Author Share Posted June 9, 2021 It looks pretty similar Bart. Its a dual pole, 4 leg, and switched ( whatever that means ) but i cannot see the spec on the distance between solder legs. 1 mm out would mean it wouldnt fit, presumably Quote Link to comment Share on other sites More sharing options...
bartelby Posted June 9, 2021 Share Posted June 9, 2021 Just now, fleabag said: It looks pretty similar Bart. Its a dual pole, 4 leg, and switched ( whatever that means ) but i cannot see the spec on the distance between solder legs. 1 mm out would mean it wouldnt fit, presumably 17.05mm along the length 16.23mm widthwise 1 Quote Link to comment Share on other sites More sharing options...
fleabag Posted June 9, 2021 Author Share Posted June 9, 2021 Wonder why i couldnt find that ? Cheers Bart 1 Quote Link to comment Share on other sites More sharing options...
fleabag Posted June 9, 2021 Author Share Posted June 9, 2021 Dammit - just whipped out yon digital calipers. 15.85 mm length 12.35 mm width ☹️ Quote Link to comment Share on other sites More sharing options...
fleabag Posted June 9, 2021 Author Share Posted June 9, 2021 (edited) There's this, but again, cannot see the measurment betwen solder legs http://www.farnell.com/datasheets/2303779.pdf Edited June 11, 2021 by fleabag Quote Link to comment Share on other sites More sharing options...
Huge Hands Posted June 9, 2021 Share Posted June 9, 2021 (edited) "Switched" means that when you push a jack into the socket, it will break the connection between the legs, i.e. switching something off. In otherwords, two pairs of the 4 pins will be connected together until the jack is pushed in and forces them apart - the jack points will then connect to 2 of the legs on one side. They are used in patchbays/inserts a lot. -The signal from a fixed source is constantly connected to the output until you push a jack in and then that is connected to the output instead. I'm afraid I don't know Markbass stuff enough to know if it uses these for a particular circuit or if they just use it as a standard jack socket and the non plugged route is redundant. Edited June 9, 2021 by Huge Hands 1 Quote Link to comment Share on other sites More sharing options...
fleabag Posted June 9, 2021 Author Share Posted June 9, 2021 Ordered the one above I'll have to make it fit Quote Link to comment Share on other sites More sharing options...
fleabag Posted June 9, 2021 Author Share Posted June 9, 2021 Just now, Huge Hands said: "Switched" means that when you push a jack into the socket, it will break the connection between the legs, i.e. switching something off. In otherwords, two pairs of the 4 pins will be connected together until the jack is pushed in and forces them apart - the jack points will then connect to 2 of the legs on one side. They are used in patchbays/inserts a lot. -The signal from a fixed source is constantly connected to the output until you push a jack in and then that is connected to the output instead. I'm afraid I don't know Markbass stuff enough to know if it uses these for a particular circuit or if they just use it as a standard jack socket and the non plgged route is redundant. Thanks HH. I dont know either, regarding what MB use. I did a search for MB spares before posting here and there's just about bugger all Quote Link to comment Share on other sites More sharing options...
BassBunny Posted June 9, 2021 Share Posted June 9, 2021 6 minutes ago, fleabag said: Thanks HH. I dont know either, regarding what MB use. I did a search for MB spares before posting here and there's just about bugger all MB don't market spares. They send you to Real electronics who will diagnose the fault and then swap the offending PCB. They don't seem to work at component level and their charges are pretty hefty. 1 Quote Link to comment Share on other sites More sharing options...
fleabag Posted June 9, 2021 Author Share Posted June 9, 2021 Seems about right. I dont need an amp tech to solder 4 lugs onto a pcb, which i have already dismantled to get the jack socket off. The socket was £7.21 and it WILL fit Quote Link to comment Share on other sites More sharing options...
Huge Hands Posted June 9, 2021 Share Posted June 9, 2021 13 minutes ago, fleabag said: I'll have to make it fit If you're ok with a soldering iron and there's room, you could solder short fly leads on to your replacement and then solder those leads to the board, then the socket would be free to be a different size - as long as the nut around the socket held it in place against the front panel..... Quote Link to comment Share on other sites More sharing options...
fleabag Posted June 9, 2021 Author Share Posted June 9, 2021 We'll see how the CPC socket works out. My soldering station is a pretty funky bit of kit, as long as i can get the legs through the holes in the PCB Quote Link to comment Share on other sites More sharing options...
neepheid Posted June 11, 2021 Share Posted June 11, 2021 I had to replace the headphone socket on my amp as the breaking connectors had lost their spring and were lifting by themselves, randomly muting the amp. Took a while to diagnose that one Replaced it myself, it was pretty easy. I see you've already done the most annoying part - removing the old socket, so it should be a breeze as long as you're replacing like for like. 1 Quote Link to comment Share on other sites More sharing options...
Matt P Posted June 11, 2021 Share Posted June 11, 2021 the dimensions for that kind of socket are usually given for the holes in the pcb, from the photo you have posted it looks like the measurements you gave might be backwards? it looks wider than it is long. another measurement to check is from the end of the threaded part to the first set of pins, this needs to be right so that the board goes back in the chassis correctly. Matt 1 Quote Link to comment Share on other sites More sharing options...
fleabag Posted June 11, 2021 Author Share Posted June 11, 2021 Indeed Matt, it was the holes i measured. But if i gave backwards measurements ( quoted below ) and we swapped 'em round, the first socket posted by Bartelby by still wouldn't fit , but on the one i ordered, there doesnt seem to be a measurment for the pins. It just looks right and if it doesnt fit. i'll start again. I reckon Markbass, being a rather large company, can afford to have the components made as a one off so you have to have an official repair done Dammit - just whipped out yon digital calipers. 15.85 mm length 12.35 mm width Quote Link to comment Share on other sites More sharing options...
fleabag Posted June 14, 2021 Author Share Posted June 14, 2021 Well the CPC Farnell socket fitted a treat, but that wasnt the problem, so it seems. Now booked in for a real tech to look at which means my old buddy Dave Smart Quote Link to comment Share on other sites More sharing options...
rmorris Posted June 16, 2021 Share Posted June 16, 2021 On 09/06/2021 at 17:43, Huge Hands said: " They are used in patchbays/inserts a lot. -The signal from a fixed source is constantly connected to the output until you push a jack in and then that is connected to the output instead. I'm afraid I don't know Markbass stuff enough to know if it uses these for a particular circuit or if they just use it as a standard jack socket and the non plugged route is redundant. Yes - used for "normalling" in patchbays - ie the 'normal' signal route exists with no plug inserted and the signal routing is modified when you plug in to put another piece of kit in the chain. And in headphone / speaker automatic switching etc. On an amplifier input the switched contacts are 'normally' connected to 0V so that the amp is quiet when no cable plugged in. Otherwise the high impedance of the input would pick up noise. Plugging a cable in replaces 0V with the signal from the guitar. The contact nearest the front of the socket would usually connect to 0V anyway so the switching on that contact may have no effect (although the designer might do something not straightforward with the 0V / Screen connection) but those sockets are mass produced like that. Quote Link to comment Share on other sites More sharing options...
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