Technics Stock Leads Capacitance Way Too High!!

by **todd95008** » 03 Aug 2010 05:16

Here is the last message I got tonight from Kevin at KAB...

Hi,
I went back through my cable box tonite and found 3 sets of this new cable.
Measured it and got 318pf.

This new cable was introduced sometime this year, but I am unable to nail it
down any better than that.

The details are as follows.

Older 2008/2009 cable measures 120pF
Marked:
E220774 AWM STYLE 2555 80C 300V VW-1 MIGHTY WIRE
This is a stiff cable and appears to be polyethylene insulation

The newer cable measures 318pF part number RJL2P009S12
Marked:
AWM 2562 E81015 VW-1 80C 300V HSD LF
This is a very flexible cable and appears to be PVC insulation.
------------------------------------------------------------------
This cable is out of specification per the SL-1200 owners manual.
------------------------------------------------------------------
My current stock of MK2's is actually 2009 now and has the older cable.
As more 2010 stock becomes the norm, this will have to be dealt with
however, because for Moving Magnet cartridges, it is not possible to load
them properly with a cable capacitance exceeding 300pF.

Taking into account most preamps have internal capacitance of 100pF and some
even higher, the absolute maximum capacitance attributed to the cable should
not exceed 170pF based on popular cartridge load specifications of
270pF//47Kohm

I am sending this to Panasonic quality control. No promises of any changes,
but there is at least the responsibility to let them know.

Thanks for your help in bringing this to our attention.

Kevin

KAB Electro Acoustics
Preserving The Sounds Of A Lifetime

by **cafe latte** » 03 Aug 2010 06:14

Great work Todd!! I have tried to contact Kevin re what would be better cable to use as the one I used stops me from installing the base plate have you got his contact?

by **cafe latte** » 03 Aug 2010 07:00

Now we have nailed this down, big thanks to for advising me to check the capacitance in the first place and all his help, now I can really enjoy my sl1210 with new leads

by **todd95008** » 03 Aug 2010 07:41

cafe latte wrote:Great work Todd!! I have tried to contact Kevin re what would be better cable to use as the one I used stops me from installing the base plate have you got his contact?

His contact is on the KAB web site: www.kabusa.com

You can try to enlarge the opening (where the old bushing was) in the round bottom plate to provide enough room for the new cables to pass thru.
Then either drill some holes to tie cable down or add some cable tie mounts to tie them down.

The MG5 cable I swapped into mine was thicker than the El cheapo stock cable so I could not get the strain relief bushing back on.
I just used one of the two bushing mounting holes to screw down a cable tie mount and tied the new cable to that !!

Todd

by **Werner** » 03 Aug 2010 08:03

Cafe,

perhaps it is wise to post a summary of this on the various other vinyl-centric fora, such as Audio Asylum and Pink Fish.

by **cafe latte** » 03 Aug 2010 08:04

Do you send to the info@kabusa.com?? I wanted to ask Kevin what is the thickest cables that will fit. The cables I have fitted prevent the plate going on so I want to either fit thinner cables so it will just go on, or make a new plate and put phono sockets on it and just plug leads into that.

by **todd95008** » 03 Aug 2010 19:28

cafe latte wrote:Do you send to the info@kabusa.com?? I wanted to ask Kevin what is the thickest cables that will fit.

Yes, that is the original e-mail address I sent him the bad cable info on !!
He is the best one to hekp you with the bottom plate since he does rewire upgrades all the time....

by **aabottom** » 03 Aug 2010 23:07

Very interesting thread. Thanks for all the great posts.

It's time to experiment...

by **cafe latte** » 04 Aug 2010 00:17

Yes posting a summary, or a lik on other forums may be a good idea. Is anyone already a memer of these sites, if so they could post a link, if not I will do it.

by **cafe latte** » 04 Aug 2010 00:46

Thanks mate, one down a couple to go!!

by **Werner** » 04 Aug 2010 07:10

I just did Audio Asylum and Pink Fish.

by **cafe latte** » 04 Aug 2010 10:46

Thanks Werner appreciated

by **fscl** » 07 Aug 2010 12:42

Any updates?

Especially from other forums? :?:

Fred

by **LPM** » 13 Aug 2010 07:40

Took me a while to organise getting my ICs checked for my 6 month old Aussie delivered 1210. My readings are high but slightly different to the others. ICs are marked "AWM E208931 Style 2562 80 C 300V VW-1 Tri Wire -LF" and measured 267pf right channel and 271pf left channel including my silver vdH tone arm wire. That means with my phono ICs and phono added in about 455pf each channel. Within the 400 to 500 range originally recommended by Shure for their M95 and M91 at 47K.

However, using the Hagtech calculator for my nominally fixed 47K A.N.T. phono, it indicates desired total values of 325pf for my M91 (720mh), 290pf for my M95 (650mh) and 220pf for my DL160 (490mh) if I am using the calculator correctly. If I order the M5G leads from KAB, it will bring my total capacitance down to approx 270pf so I guess that's the smart way to go.