Akarakrit Uamkruea, blogger and audio gear maker who passionate in vacuum tube, audio & music.
Producing electronics projects since high school. Seriously upgrade and modify vintage audio equipment for “Real Sound” concept.
He is a co-founder of Soundaries, all audio solution provider.
Experienced and lively explore the listening rooms & audio shops in Japan as his most favorite to do.

Sunday, May 4, 2014

Winding Resistance Step Attenuator

After searching many information of vintage step attenuator 
for use in my tube preamplifier.
I've found attenuator in the box that use Tech Lab 600 Ohm attenuators.
Tech Lab Inc. was made high quality attenuator like Daven did,
that use in audio and measurement products like Western Electric, Tektronix, etc.
Stereo Sound Japan was provide information of 
Tech Lab PK-322 that has 2 types of resistor inside.



Type I : Mold Resistor & Winding Resistance Type




Type II : All Winding Resistance Type




Attenuator in the box from Stereo Sound Japan 
was use in many test system of Tube Kingdom magazine.



Like Stereo Sound Japan Website recommended.
Type I attenuator matched with all popular and modern music and 
Type II attenuator matched with old school music like Blues, Jazz and Classical. 

Both types improve dynamic and detail of sound system a lot. 


Let's try !!!
Posted by at

6 comments:

  1. AnonymousJune 26, 2014 at 4:55 PM

    Hello NA - That's very cool, especially the nice box. Attenuators remind me of Daven attenuators. Cheers, Owen

    ReplyDelete
  2. UnknownMarch 12, 2019 at 6:45 AM

    You have only used two in your pictures! Did you ever do anything with the other two? I need these for an old limiter I own! Please sell them to me!

    ReplyDelete
    Replies
    1. Akarakrit UamkrueaMarch 15, 2019 at 10:01 AM

      Hello,

      I bought a pair for $250 and can sell to you the same price.

      Let me know if you still interest.

      Thanks,

      Delete
  3. boHaoSeptember 2, 2021 at 8:24 PM

    Hello, I have pair of these in my ampplifier and I am really interested in how you disassemble the outer metal cover from the inside body?

    ReplyDelete
  4. boHaoSeptember 21, 2021 at 9:45 PM

    I also have interest in buying a pair of these attenuators if there is still some left! Please let me know if you also willing to sell. Thanks in advanced!

    ReplyDelete

Subscribe to: Post Comments (Atom)