mystery jacks

snufkin · February 17, 2009, 03:50:26 PM

so i opened up a elka rhapsody string machine that I picked up super cheap and found that two of the audio output jacks have disintegrated

the jacks in bits looked like mono jacks (i think) with one wire going to the tip of the input jack and a second short wire joining the two rings and a third wire connected to the tip on the second jack (hope thats clear)

so I popped in two new jacks wired in this way but all i get is hum

my question is could the original jacks be isolated from the casing? my replacement defiantly are making electrical contact with the case

they look similar but without being able to re assemble the old ones I cant test my theory

frequencycentral · February 17, 2009, 04:31:59 PM

Sorry, I can't help - but I've lusted after one of those for years. Please do not tell me how much you paid for it. Please!

snufkin · February 17, 2009, 04:50:10 PM

I got it for £20 Rick (sorry couldn't help myself)

I may have to let go of it to someone who will appreciate it in the near future due to space issues if i do you will be the first to know

damn I need to sort this problem out its a mystery to me tho damn ground hum it worked at first

maybe debugging synths is a little out of my depth still

The French connection · February 17, 2009, 04:57:18 PM

Is it a NC switch jack like that?

http://www.smallbearelec.com/Detail.bok?no=88

Dan

frequencycentral · February 17, 2009, 04:59:01 PM

Quote from: snufkin on February 17, 2009, 04:50:10 PM
I got it for £20 Rick (sorry couldn't help myself)

Damn! I asked you not to tell me!!

Quote from: snufkin on February 17, 2009, 04:50:10 PM
I may have to let go of it to someone who will appreciate it in the near future due to space issues if i do you will be the first to know

Mmmmmmmmmmmmm!!

I'm a bit of a vintage keyboard collector, it would sit well in my collection. Maybe on top of the Rhodes?

snufkin · February 17, 2009, 05:11:56 PM

Dan YEAH thats it! with the weird straight bit that touches the tip contact

can you give me more info I have never come across them before (i'm kind of new to popping open vintage synths)

The French connection · February 17, 2009, 05:21:19 PM

Cool! I dont know much but i bet they put this for switching between two output so when something is plug in it switch on or off the other output and vice versa. Like a headphone output and a speakers output...Just follow the tab and you'll see what i'm saying, i hope so!

snufkin · February 17, 2009, 05:28:04 PM

yeah the two jacks are genral ad piano out what ever that means

http://www.till-kopper.de/elka/outputs.jpg

thanks so much for the help

would not have spotted this I really value this forum and its members

now just have to get hold of two switching jacks! and tangerine dream here I come!

ZiggyZipgun · February 17, 2009, 05:54:27 PM

"Piano Out" could mean lower output level - Elka is an Italian company, piano is Italian for "soft" or "quiet". At least they would know what they were talking about, unlike Leo Fender, who permanently confused the meanings of tremolo and vibrato for all music-loving Americans. Just a suggestion.

snufkin · February 17, 2009, 06:09:32 PM

damn that no good LEO !

good suggestion will test it when i get the synth up and running

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mystery jacks