Korg WT-12

John Russell · Post by **John Russell** » 18 May 2000 9:37 am

My old korg wt-12 finally gave up after 22 years of loyal service. New batteries didn't revive it. Something tells me it's some little chip thing or $2 resistor, no?

I replaced it with a Boss TU-12 but it just ain't the same.

Any suggestions on where to get it fixed? I tried the Korg web site and they only referred you to local music stores as service centers. I'm guessing that won't work.

JR

Jack Stoner · Post by **Jack Stoner** » 18 May 2000 10:35 am

Best thing is to put out a want ad, in the buy and sell, for another. They are pretty old and many of the parts are probably not available, even if you could find someone with a schematic that could work on it. The WT-12 has an excellent expanded meter scale, which works well with the steel. You could also look for a used AT-12, which is almost as good and it has an automatic detect rather than having the manual switch.

John Russell · Post by **John Russell** » 18 May 2000 2:39 pm

Thanks, Jack.

Is that AT-12 the current version of the chromatic tuner? I haven't kept up with Korg tuners but I know they've upgraded and have several models. As you said, the meter was so easy to read on the WT-12 and when you dialed in the correct freq. range, the needle stayed still and didn't jump around the way the Boss tuner does. Also, it seemed that the response time was quicker, i.e. when you plucked the string, the needle went to its position immeditely, the Boss unit is a little slow.

JR

Jack Stoner · Post by **Jack Stoner** » 19 May 2000 3:41 am

The AT12 is obsolete too. It replaced the WT12 about 10 or 15 years ago. Physically they are about the same size. I have a TU12H model that I carry around in my seat, because it's small, but don't use it much as my Transtube Fex has a built in chromatic tuner that is very accurate.

Most of the newer tuners are either LED's or have an LCD meter display and I've never seen one that I would recommend. Even the rack mounted Korg's have LED's and you have to guess at the .5Hz tunings.

Robert Parent · Post by **Robert Parent** » 19 May 2000 7:14 am

Hi John,

Does the tuner operate when using the wall-wart power supply? You could check the wires from the battery to the power supply jack and the related mechanical switch. After I used mine for about 20 years one of the wires broke on the power jack / switch.
If I remember right, I also had problems with the switch in the power jack about the same time.

I bought a new Korg DT1 rack tuner which I really like, but I still use the old Korg from time to time mostly around the house. What I found amazing is that when I plugged the old Korg into the new Korg the accuracy of the old one was right on after 20+ years.

sonbone · Post by **sonbone** » 19 May 2000 3:57 pm

Korg currently makes a tuner called the MT 1200 that you can program your temperment into. It has a large backlit meter that is easy to use on stage. It is a bit expensive at around $300, but for me is well worth it.

------------------
www.startext.net/homes/sonbone1

Bill Crook · Post by **Bill Crook** » 20 May 2000 12:30 am

John....

The WT-12 has a couple of chips in it with the markings "LM329" as chip numbers. I have replaced them in a number of sets and revived the tuners. The "LM329" is basically a quad-amp chip, has been around for a long time, and generally can be found at most any electronic parts house.

Of course... This is a last resort thing after checking out the above post suggestions about the power jack and wires. Another thing I find on these set is the speaker wires and battery wires are prone to breaking after a few years.
Hope this helps !! [This message was edited by Bill Crook on 20 May 2000 at 07:28 AM.]

Ron Hiler · Post by **Ron Hiler** » 20 May 2000 2:31 pm

I have a korg, model WT-10A, got it in 1976,same nite I bought my session 400,the only problem I've had with the tuner, the battery holder corroded, and had to replace it,and the (sound part) quit workin years ago, other than that , it's still working good, every so often chek it with the tuning fork, Jack would this be one of the first one that were made? sure would be lost with out it. Ron

George Rozak · Post by **George Rozak** » 20 May 2000 5:49 pm

I'm also using an old WT-10A that I bought in the early 70s. It's still working great.

Bobby Lee · Post by **Bobby Lee** » 20 May 2000 8:12 pm

<img src="http://www.korg.com/gear/images/product ... _AT120.jpg" align=left>I use a Korg AT120. It has a big, sensitive meter and a switch for cents or Hz. This is the best tuner I've ever used. I think I got it for about $230 a few years ago.

------------------
<img align=right src="http://b0b.com/b0bstamp.gif" width=72 height=72>Bobby Lee quasar@b0b.com gigs CDs
Sierra Session S-12 (E9), Speedy West D-10 (E9, D6),
Sierra S-8 Laptop (D13), Fender Stringmaster D-8 (D13, A6)