Need to rewire TK14

twice the fun
Post Reply
tep392
member
member
United States of America
Posts: 228
Joined: 19 Jun 2018 14:57

Need to rewire TK14

Post by tep392 » 15 Aug 2019 18:21

I have a TK14 that is intermittently dropping out audio due to corrosion between wires and pins/connectors. I want to rewire with new wire and connectors. I've removed the spring loaded pins from the body but it looks like it's going to be difficult to solder new wire to the pins. I need to undo the crimps and clean up the inside of the pin but it's all pretty delicate. I'm just wondering if anyone here has done this before and can give me any tips.

DSJR
long player
long player
Wales
Posts: 2935
Joined: 01 Feb 2009 20:29
Location: Suffolk

Re: Need to rewire TK14

Post by DSJR » 16 Aug 2019 22:09

It's doubtful that the wires are at fault, but more the tips of the sprung pins as well as possible misalignment in the headshell terminal strip. Whenever I've tried to re fit these pins, the little fixing plate has snapped at one end, making the carrier useless.

Good luck. Try some 'silver dip' to clean the cartridge tags and pins and very good luck in reassembly without breaking anything ;)

tep392
member
member
United States of America
Posts: 228
Joined: 19 Jun 2018 14:57

Re: Need to rewire TK14

Post by tep392 » 17 Aug 2019 00:38

Thanks for the advice! I've already successfully removed the spring pins without breaking anything. :) The terminal plate in the headshell is good and my NOS tk24 works very well. I've narrowed it down to one wire is broken/intermittent at the connector end. And one wire measure consistent high resistance, due to the visible corrosion. That is probably not a big deal, but the broken/intermittent wire is. I could probably get away with just installing a new connector the the intermittent wire, but I don't trust the other connections will work reliably in the future due to the corrosion. I trust solder, not crimps. :) I already have new wire and connectors, so I'm going to give it a shot. I might just clean the end of the spring pin and carefully solder the wire to the outside surface of the pin, instead of trying to uncrimp the old wire.

DSJR
long player
long player
Wales
Posts: 2935
Joined: 01 Feb 2009 20:29
Location: Suffolk

Re: Need to rewire TK14

Post by DSJR » 17 Aug 2019 10:55

Crimping, I was taught, makes for a very tight mechanical connection (solder anchors a mechanical connection and shouldn't actually *be* the connection) and seems to work in these Dual carriers as long as the wires aren't snagged. I wish you luck :D

tep392
member
member
United States of America
Posts: 228
Joined: 19 Jun 2018 14:57

Re: Need to rewire TK14

Post by tep392 » 17 Aug 2019 14:08

I’ve read that too, but then I think about through hole components being held in PC boards by nothing but solder. How is this different?

DSJR
long player
long player
Wales
Posts: 2935
Joined: 01 Feb 2009 20:29
Location: Suffolk

Re: Need to rewire TK14

Post by DSJR » 17 Aug 2019 21:18

The best ones band the component legs over before soldering ;) Mind you, this becomes a nightmare replacing components many years down the line, although I suppose one should cut the component out before de-soldering the remains of the legs...

tep392
member
member
United States of America
Posts: 228
Joined: 19 Jun 2018 14:57

Re: Need to rewire TK14

Post by tep392 » 17 Aug 2019 21:49

My 1970 Kenwood KR-70 is actually the first stereo component I’ve experienced with the leads bent over 90 deg, and it does indeed make removing components more work. It helps to have a Hakko desoldering tool. :) None of my vintage computers have this thankfully.

tep392
member
member
United States of America
Posts: 228
Joined: 19 Jun 2018 14:57

Re: Need to rewire TK14

Post by tep392 » 16 Sep 2019 17:02

I managed to get new wires/connectors soldered to the sprung pins. It was a very delicate operation, not for the faint hearted, but I am well practiced with a soldering iron. Resistance in the leads measure less than 0.1 ohm now.

Post Reply