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Sony HA-T10 MC Step Up transformer

Posted 8th October 2009 at 08:59 AM by androidDIY

Click the image to open in full size.
When I was young,I like to build the MC pre-preamplfier for myself.But the hum/noise reduction is always a very big problem.

After using several excellent input transformers like Jensen,Lundahl and UTC,I should change my concept.
I will prefer using MC step up transformer in my system.Sony HA-T10 is very cheap is easy to find in Japan.I will ask my friends to find some for me and start the way.

Yes,I will try Jensen and Lundahl later.
Another question is - where is my MC catridge?

The Sony HA-T10 is a high quality super-mini step-up transformer, which can be used with moving coil cartridges in the impedance range from 3 to 40 ohms.

The optional RK-125 connecting cord is available to connect the HAT10 to the main amplifier to nullify hum.

Matching cartridge impedance: 3 to 40 ohms...
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Posted in Audio Life
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Posted 8th October 2009 at 08:23 AM by androidDIY
Updated 10th October 2009 at 03:34 PM by androidDIY

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Posted in Audio Life
Views 453 Comments 0 androidDIY is offline

Try the 1st blog post

Posted 8th October 2009 at 08:16 AM by androidDIY
Updated 8th October 2009 at 08:39 AM by androidDIY

Click the image to open in full size.

I found an website yesterday.The owner seems to be a professional reporter who wrote lots articles associated with the Japan Adult Video.
It's really interesting,I never thought the Japan Adult Video could be analyzed like that.

Here is the link -

相信在十月一定有不少人在期待天海つばさ(天海翼)這位新人吧?畢竟在Ideapocket舖天蓋地的宣傳 之下,大家都想知道這個「アイドル顔負けの超美少女」(臉蛋不輸偶像的超美少女)的新人究竟是不是真貨;而 在寫真照片公布之後,更有人拿她和ideapocket之前培養出的超級彗星初美りおん(初美Rion)相 比,可見這位天海つばさ(天海翼)是讓眾人多麼期待。

Does this sysem support Chinsee?

OK,It works!
I could use this as my blog.....
diyAudio Member
Posted in Funny Stuff
Views 631 Comments 0 androidDIY is offline

HTG, this little girl scares me -

Posted 7th October 2009 at 08:10 PM by tomtt
Updated 6th August 2010 at 10:20 PM by tomtt

a whole lotta energy ,

squirmed 'n fidgeted ...

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

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Posted in Uncategorized
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Cyrus 1 Caps

Posted 7th October 2009 at 04:16 AM by lrseries3

Hi, anyone know how to determine the polarity of old Elna caps? They are orange electrolitics but have no indication of the negative side.

Thanks Stuart
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Posted in Uncategorized
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Is a Room correction trial possible?

Posted 4th October 2009 at 02:01 AM by lazycatken

Originally Posted by brianuk View Post
Anyway my idea is to just burn a CD to try this as proof of concept before spending on a good looking PC box.
By burning a corrected CD, you can easily understand DRC indeed works, but with 1 or 2 bits resolution loss. That's due to the equalization of magnitude frequency response.

Using 18 or even more bits is a must.
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Posted in Uncategorized
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Beast with a Thousand JFETs

Posted 28th September 2009 at 06:17 PM by DougL

Originally Posted by Nelson Pass View Post
Jam called me up and asked if I have ever paralleled up a
bunch of 2SK170's and 2SJ74's to make a power output

I guess it's time to unveil the Beast with a Thousand JFETs.

Here's the first teaser, a circuit panel to hold 588 JFETs and
associated resistors.
What can I say. Its a pleasure to see a master at work.
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Views 715 Comments 0 DougL is offline

26-sep-09 Floyd Toole speaks

Posted 26th September 2009 at 04:30 PM by planet10

Thursday i took the ferry over to Canada to attend a lecture by Floyd Toole at an AES presentation.

The lecture covered off a summary of the contents of his book. It probably was more enlightening for those that haven't read the book, but i was able to get a few details added.

He also signed my book, and really liked my title - Frugal-phile(tm) -- he said we need more of them

I have added this to my absolutely required audio reading list along with Leviton's "This is your brain on music" Very complentary books.

Floyd's book summarizes the 40 years of work he has done on loudspeakers & rooms.

The 3 most interesting things in the book are
1/ under well controlled & designed blind listening tests there is a very high level of consistency in what listeners consider best sounding
2/ a FR metric has been developed which has a high correlation with what people prefer. Unfortunately this...
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Posted in Uncategorized
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The day Sydney saw red!

Posted 23rd September 2009 at 12:10 PM by wintermute (Wintermutes Rantings)
Updated 25th November 2009 at 11:13 AM by wintermute (added to category misc)

I woke up this morning, and immediately had a slightly uneasy feeling. There was a strange orange glow seeping through the gaps in the blinds! I tentatively pulled aside one of the vertical pannels and saw what appeared to be red fog. Thoughts of armorgedden, and the cover of Midnight Oil's "red sales in the sunset" came to mind. I was about to grab the camera when Mya decided it was time to wake up and have some milk. Best not to delay the milk supply for a 21 month old with a nasty cold, or armageddon might seem like a palletable alternative, so I made the milk and appeased the small one.

By the time I got the camera, the sky was more orange than red, took a snap and started to get ready for work.

It would have been sensible to take the good camera with me but I was not thinking along those lines as I hurried off to work. Driving to the train station was weird in itself, the headlights of oncoming cars had a strange blue tinge, and so did the...
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Posted in misc
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Alpine 7949 No Backlight

Posted 22nd September 2009 at 03:26 PM by dssjason

Originally Posted by dssjason View Post
I have a Alpine 7949 with no backlight.I have swapped out the faceplate with another one and have tested the ribbon cable off the motherboard and it's good.I don't have a schematics for this unit.Does anyone know what part on the motherboard i should be looking at or try replacing ? What feeds the backlight?
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Posted in Uncategorized
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