[Jukebox-list] "Clips"-was-Cartridge Installation on Rockola1438 ?

[Don Tutt]

Hello Britt

Try your idea of wrapping the ground wire around the signal wire.
Several difficulties might result.
If the combination of wires is too heavy you might have tracking problems. 
If too stiff you might have trip switch problems.
Because wrapping a ground wire around the signal wire does not fully protect 
the signal wire from electromagnetic fields, I would suspect you will notice 
an increased hum .

Trouble in any of these areas might mean you should replace the wiring with 
new sheilded wire that is light enough and provides easier ability to solder 
to the sheath.

Do you understand how to properly prepare the end of a sheilded cable for 
soldering to signal wire and to sheild...?

Good Luck,
Don


----- Original Message ----- 
From: <wbabbott at cox.net>
To: "Jukebox mailing list" <jukebox-list at lists.netlojix.com>
Cc: "Ron Rich" <ronnnrich at yahoo.com>
Sent: Thursday, December 28, 2006 10:53 AM
Subject: Re: [Jukebox-list] "Clips"-was-Cartridge Installation on 
Rockola1438 ?


> Got the clips today. Went to a local electronics store that had small bags 
> of the gold colored pin clips. The shielded single wire cable I have for 
> rewiring the cartridge has rubber around the shielding, so the shielding 
> is hard to get to in order to use it as GROUND. Is it OK to use a separate 
> wire from cartridge ground terminal to ground on the AMP?? I'll probably 
> just coil the ground wire around the shielded cable all the way down into 
> the phono plug.
> Thanks,
> Britt
> ---- Ron Rich <ronnnrich at yahoo.com> wrote:
>> Clips (or socket pins) should be included with the new cartridge--  
>> Contact whomever you got it from--Ron Rich
>>
>> Don <dontutt at telus.net> wrote:  Re: CLIPS
>> If no one has a better suggestion, you might look inside a discarded PC
>> (computer) (as I did recently)
>>
>> There, you will find gold plated "clips". They are located inside the
>> plastic plugs of the power wiring harnesses. There are different sizes of
>> these "clips" to be found. Some might be just the right size.....
>> If you cut away the plastic you could tease out a few of these "clips" 
>> and
>> see if they are the right size to make a good friction fit onto the cart
>> pins.
>>
>> If so, just cut them off their wires and carefully solder them on to your
>> cart wires. Maybe a little heat shrink needed too.
>>
>> For What Its Worth,
>> Don
>>
>>
>>
>>
>>
>> ----- Or
>> iginal Message ----- 
>> From:
>> To: "Jukebox mailing list"
>> Cc: "Jay Hennigan"
>> Sent: Wednesday, December 27, 2006 1:43 PM
>> Subject: Re: [Jukebox-list] Cartridge Installation on Rockola 1438 ?
>>
>>
>> > Jay, thanks for reply. Yes the new, replacement stereo cartridge I have
>> > has the four prongs as you describe. When you say use "clips" instead 
>> > of
>> > soldering direct to these prongs, what make/type of clips are you 
>> > talking
>> > about? Where do I get these clips? Also, the replacement shielded cable 
>> > I
>> > got is rubber coated over the shield which is over the rubber coated
>> > center core lead. How can I get this shield grounded or is there 
>> > another
>> > way, like using a separate ground wire? Or, where can I get maybe a two
>> > ply shielded wire, ie center core input and separate unshielded ground?
>> > ---- Jay Hennigan wrote:
>> >> wbabbott at cox.net wrote:
>> >> > I've received a new stereo cartridge for my Rockola 1438 along with 
>> >> > a
>> >> > new replacement shielded phono cable to rewire the cartridge with as 
>> >> > my
>> >> > original is looking very ratty. It appears that the original 
>> >> > cartridge
>> >> > is in place, but has been slightly "re-wired" in past. There are two
>> >> > terminals on the original cartridge which I believe is 1.needle 
>> >> > output
>> >> > and 2. ground. The output terminal has the core of the phono cable
>> >> > soldered to it .The ground terminal has a wire lead which appears to 
>> >> > be
>> >> > soldered to the phono cable outside shielding?? It would seem to me
>> >> > that the ground would be grounded somewhere other than the metal
>> >> > shielding on the cable??
>> >> >
>> >> > Before I install and rewire new stereo cartridge, I want to be sure 
>> >> > how
>> >> > to properly wire and ground the cartridge. Please give me some
>> >> > instruction here...!
>> >>
>> >> That is correct wiring for a monaural cartridge. For stereo, the
>> >> conventional way is to wire the shield to both (-) terminals and the
>> >> center conductor to both (+) terminals. The cartridge may have molded
>> >> letters like LG, RG, L, R, which are abbreviations for Left Ground,
>> >> Right Ground, Left, Right. There may be a small brass clip between one
>> >> of the ground terminals and the cartridge case. Depending on the 
>> >> wiring
>> >> of everything else, leaving this connected may result in hum. It can 
>> >> be
>> >> removed by prying it off with the connector removed.
>> >>
>> >> Don't solder directly to the cartridge pins, use clips.
>> >>
>> >> In some cases, you'll get better performance by wiring the stereo
>> >> cartridge in series. This gives a higher voltage output which can be
>> >> helpful as the older cartridges often had higher output than the
>> >> replacements. This is done by connecting the shield to LG, connecting 
>> >> L
>> >> and RG together, and the center conductor to R.
>> >>
>> >> --
>> >> Jay Hennigan - CCIE #7880 - Network Engineering - jay at impulse.net
>> >> Impulse Internet Service - http://www.impulse.net/
>> >> Your local telephone and internet company - 805 884-6323 - WB6RDV
>> >> _______________________________________________
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