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View Full Version : Need Help, Technic 1200 RCA Replacement trouble.



Joe.G
10-20-2012, 10:50 AM
Hi, Ok I have these cables http://www.hosatech.com/product/437651/ ... e%2C_10_ft

Once I cut them open I have The loose metal shielding, in each wire Right and left side and also I have two little shielded wires 1 Red and 1 blue in each side.

If I take off the metal end on the Rca cable Red and Blue wire are Solder together on the center post and the loose metal shielding is solder to the outer part.

The Cables on my Deck have what appears the shielding solder to the outside and then only one wire in the center solder to the center of the board.

Do I just twist the Red and Blue wire together and solder them to the same spot on the board on the deck and then the shielding to the other spot? Of course I ll strip some of the rubber coating off of the Red and blue wire and do this for the left and right channel. Thanks

P.S I have watched and read all over the net, I don't see anyone talking about there being two separate sheathed wire inside each main wire.

Joe.G
10-20-2012, 11:24 AM
http://i1229.photobucket.com/albums/ee463/JoeyGags/Misc/PA202321.jpg

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http://i1229.photobucket.com/albums/ee463/JoeyGags/Misc/PA202326.jpg

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http://i1229.photobucket.com/albums/ee463/JoeyGags/Misc/PA202330.jpg

http://i1229.photobucket.com/albums/ee463/JoeyGags/Misc/PA202331.jpg

DTR
10-22-2012, 02:10 AM
You have used the wrong kind of cable but it doesn't really matter. It will work the same whether you solder the red and blue together, or just use one core and the cut the other one back.

Joe.G
10-22-2012, 07:39 AM
I Solder the Red and Blue together on each side, then I Solder the Shielding to the PCB Board and then the blue and Red combo to the board, For both wires of course and everything seems to sound fine, both channels are working.

Over on Vinyl Engine they talk a lot about the capapcitance of the cable what are your guys feelings on that? The Hosa cables claim low capapcitance but I can't check it since I don't think my muilti meter reads it.

Also I am prob better off soldering the two wires together instead of just using the one right?

DTR
10-24-2012, 01:34 AM
Over on Vinyl Engine they talk a lot about the capapcitance of the cable what are your guys feelings on that? The Hosa cables claim low capapcitance but I can't check it since I don't think my muilti meter reads it.

Phono preamps are very sensitive to resistance and capacitance. If the capacitance of the cable is high enough it can start to affect the high frequency response of the cart / preamp. A few companies publish what capacitance per length their cable is, but as you have found Hosa isn't one of them. You would need a special meter to measure the capacitance as the average meter doesn't, although you could set up a test rig to calculate it.

The important thing is: How does it sound? If it sounds ok then it is ok. If you can compare your deck to a stock 1200 then that's even better.


Also I am prob better off soldering the two wires together instead of just using the one right?

If I'm thinking about this the right way, one core on its own will offer less capacitance than using two. On the other hand, both cores soldered together will offer less resistance and better reliability. As above, I think if it sounds ok then stick with it.

Hope that helps

Joe.G
10-24-2012, 09:56 AM
I solder them together, I don't have it all set up yet, I did a quick test hooking up mixer to a stero in the home and it sound ok, I ll see I guess when I get it hooked up to the right speakers and amps. Everyone recommends the HOSA Cables and the only thing I can find out is that they claim they are Low capacitance.

djlotus
10-29-2012, 08:29 PM
As DTR stated, it shouldn't matter in the case of analog audio with only a 5-10 foot run.

As a rule, if I encounter cables such as those which have a "shield" that is about 2x the thickness (circular mils), I would use both insulator conductors to keep the resistance of the positive and negative relatively close.

Joe.G
11-02-2012, 02:09 PM
I tried it out and they seem to sound fine, Ill know more when I get everything set up correctly.