Replaced the insulator of YAMAHA analog record player GT-2000L.


Yamaha Analog Record Player GT-2000L.

This is a great piece of audio equipment in the golden age of audio that I continue to use with great care.

The weight of GT-2000L is quite heavy, about 28kg, and the genuine insulator was screaming under the weight of years of use.

The genuine insulators were made of rubber and spring composite structure, and they were strong enough to withstand more than 12kg of weight per insulator, even if they were replaced with 18kg gunmetal turntable "YGT-1".

Now, it's in such a mess!


Two of the four insulators were damaged, especially one where the rubber adhesive had completely peeled off and the enclosed spring had popped out.


YAMAHA didn't have any spare parts in stock, which is not surprising since the product was almost 40 years old.

I've been looking for it on the Internet auctions, but I couldn't find any genuine insulators, so I had no choice but to use other insulators.

Last year, I found interesting parts among all the junk, such as audio cables and radios, in an item called "Audio Junk Set" on online auction.

I decided to bid on it at a very low price, and when I checked what I received...


This was a set of four genuine insulators for GT-2000. This was truly a grab bag!

They were in very good condition with very little apparent deterioration, and had probably been installed in GT-2000 for a short period of time.


After disinfecting and cleaning with alcohol, it caused a blooming phenomenon of the rubber. So I applied a little bit of KURE rubber protectant, and it returned to its original black tint.


As a test, I tried to find out how much difference there was in the degree of shock absorption between the old insulator and the new insulator.
I put my iPhone SE2 on the turntable and used the vibration analysis app "Vibroscope" to measure the difference.

- Measurement result of vibration absorption at OLD insulator

- Measurement result of vibration absorption at NEW insulator

This measurement was made when the GT-2000L was placed on the YAMAHA GT-rack "GTR-1W" and the rack shelf was hit hard by hand intermittently. The results show that the new insulator dampens external vibrations better than the old one. I tried to apply the same force as much as possible, but it is difficult to apply exactly the same kind of vibration, so this was just for reference.

Now I can enjoy original sound of the GT-2000L for the first time in over a decade. I'm sure it will be fine for another 10 years or so.
posted by toons at 23:49 | Audio


New updated - "Magnetscape", "Magnetscape Lite" ver 4.0

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"Magnetscape" and "Magnetscape Lite" have been updated to ver 4.0 today.

"Magnetscape" is a new measurement app that observe invisible magnetic fields by using a built-in iPhone magnetic sensor.

"Magnetscape Lite" is a free edition that is simplified "Magnetscape".

This app can monitor the surrounding magnetic field in real time, it can be used for various purposes in real life. For instance, it can be used for investigation of static magnetic field, search for low electromagnetic field at alternating magnetic field (electromagnetic field), metal detection and more.

In the latest version, we have updated the UI design and improved the internal processing for better stability.

mag_scope_1_v400.jpg mag_time_v400.jpg 


#Magenetscape Lite
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More information about these apps can be found on AppStoreTM at the links below.


#Magenetscape Lite
posted by toons at 18:54 | News


New updated - "Vocal On Stave" ver 3.0


"Vocal On Stave" has been updated to ver 3.0 today.

"Vocal On Stave" gives you valuable visual feedback on your vocal pitch.

You just sing into the built-in microphone on your iPhone, and it graphs the estimated vocal pitch on the stave.

It will assist you visually for training your a cappella vocals and practice of Passaggio.

On sing a song, what recognize your pitch on scales? Working on scales is an important part of learning how to control your vocal, developing your voice and keeping your voicing in good shape.

Please use this app to improve the ability for your singing.

In the latest version, the UI design has been updated and the stability has been improved.

vos_1_v300.jpg vos_2_v300.jpg

Please to click the following link to view more information of this app on App StoreTM.

posted by toons at 23:59 | News


Happy New Year


Happy New Year. Cheers to a wonderful 2022!

posted by toons at 18:49 | diary