Jan 272017

It’s always wonderful to hear from Yazaki-san, and he’s always got some great ideas for audio adventures!

A week or so ago Yazaki-san told me:

Dear Jeff-san,

I have a plan to send you a pair of resistors and also a pair of reproduction WE18GA wire for power cables.

The resistors are prepared for the first tube’s cathode resistor, R5/3.3KΩ, of your splendid MC30 monaural amplifiers.

The Ohmite WH/WN line doesn’t have that particular value, but it can easily be made by the parallel connection of 5KΩ and 10KΩ resisters.

My DA30 SET’s sound was remarkably improved with this WH/1KΩ.

I have long loved and used OHMITE wire wound resistors, but this one might be the goal of all resistors for my hearing. Yes, I have not heard such an information-rich resistor.

And the new 18GA, I used it as the power cable for the DA30 (PX25A ) mono SET I built for your blog’s readers. I hope it could be completed by the end of next month.

I remembered well you had once tried WE16GA for power cable in your MC30’s, and it reminded me that my old Marantz 7 k and my DA30 SET used 18GA power cable. And so this time, I tried this new WE18GA cable for the power cable.

The results were fantastic not only for me but also for Nakamura-san, Nishikawa-san, and Kajiwara-san.

The power cable is really very nice for DVD/CD player, DV-AX10, and also for prototype Class-D amplifier.

The cable’s thickness, 18GA would be sufficient for such gear, and also the tinned-copper might fit well with our hearing, but I don’t know the reason why.

Best regards,

Shirokazu Yazaki

Yesterday the audio adventure package from Yazaki-san arrived, thank you Yazaki-san!

Yazaki-san’s audio adventure package contained the paralleled Ohmite WH/3.3KΩ resistors for R5 in my vintage McIntosh MC30 monaural amplifiers, and the reproduction Western Electric WE18GA for two power cords.

An audio adventure package from Yazaki-san!

I let Yazaki-san know that his package arrived safe & sound, and he followed up with a note telling me:

Dear Jeff-san,

To tell the truth, the day before yesterday, I changed two cathode resistors in my old Marantz Model 7k’s first stage, the phono EQ, and the flat amplifier to WN 5KΩ resistors.

And so my system at present, all the first stage tube of the preamplifier, DA30 SET and 50CA10 PP amplifier were changed to this type resistor.

It just brought me really spectacular sound stage with finest detail. And I’m so happy!!

I imagine your new Resistor Adventure would start this way too!

Well, the Ohmite needs a few hours or day to hear its true ability, I experienced.

Best regards,

Shirokazu Yazaki

In the photo below you can see the Ohmite WNE10KFE and WNE5K0FE resistors Yazaki-san paralleled for 3.3KΩ to use in the R5 position in my vintage McIntosh MC30 monaural amplifiers.

Ohmite WNE10KFE and WNE5K0FE resistors paralleled for 3.3KΩ.

Here’s a closeup of the reproduction WE18GA wire Yazaki-san sent me to try as power cords.

Reproduction WE18GA wire.

I tried WE16GA wire as power cords on my MC30’s, but it turned out not be be a very good match musically for my Westminster Royal SE based system, so after some experimentation I went back to the stock power cords that Yves uses when he restores the MC30’s (you can read about that odyssey here).

I will be looking forward to trying the reproduction Western Electric WE18GA as power cords on my vintage McIntosh MC30 monaural amplifiers, or perhaps on a DAC, or another application.

McIntosh MC30 Capacitor Adventure Project.

Yazaki-san had also recommended some high-quality & budget price AC plugs he likes to me, quite a while back, but I have forgotten what they are, so I have a request in to Yazaki-san for a reminder, and soon as I hear back I’ll get some ordered and let you know what they are.

Update – Yazaki-san responds:

Dear Jeff-san,

About the power connector or the plugs, what would be the best, I can’t tell. Yes, there are so many kinds of the gear.

But I have used Marinco 320IEC15 and Marinco 8215 NEMA Hospital-Grade Power Plug 15A 125V and these are very reasonable price.

Kind regards,

Shirokazu Yazaki

The Marinco plugs are available on Amazon: $21.59 USD for the Marinco 320IEC15, and $11.87 USD for the Marinco 8215’s. I just ordered a pair of the Marinco 8215’s for this adventure!

Update #2 – I ordered a pair of the Marinco 8215’s to try as power plugs for the reproduction WE18GA that Yazaki-san has sent me, and they have arrived.

Marinco 8215

Marinco 8215

The design of the Marinco 8215 AC plugs are similar to that of the Furutech FI-25M AC plugs I used for the WE16GA power cords I built previously, and the Marinco 8215’s are built to a nice level of quality, but not to the extreme level of quality that the Furutech offers at approximately $103 USD each.

Furutech FI-25M AC plug.

It’s nice to know that there is a quality plug like the Marinco 8215 that is available for such an affordable price.

The adventure begins!

Important note: Frederik advised me that you should not try making power cords out of the Duelund DCA16GA wire, as it doesn’t have the internal plastic insulation that the Western Electric does, which allows the Western Electric to be used for higher voltage applications like power cords or internal amplifier/preamplifier wiring, for example. The Duelund is perfect for lower voltage applications like interconnects, speaker cables, loudspeaker wiring, and crossover wiring.

Thanks for stopping by, and may the tone be with you!

 Posted by at 7:25 am

  20 Responses to “A New Adventure With Yazaki-san! Update #2.”

  1. OK, who is making the repro 18GA WE cable?

  2. I have no information about the following website, other than the name and shiny products on the site.


    Regards, Idler

  3. Hi Jeff,

    This is an exciting update from Yazaki-san. Mouser Electronics caries the Ohmite WN-series wirewound resistors in bulk. The Ohmite WH/WN resistor datasheet describes the WN-series as the “Aryton Perry winding Non-Inductive series: Inductance <1nH at 1MHZ test." The 10kohm and 5kohm resistors are $1.44 each, so the total cost for upgrading the cathode resistors on the 12AX7 tube at the input stage of my McIntosh MC240 (R12 and R35) is only $5.76. I noticed from the datasheet that these resistors also have Tinned Copper leads (Is Yazak-san trying to tell us something here?).

    My McIntosh MC240 is sounding great with some of the component upgrades I've made to date. Once the 0.1uF/630VDC Duelund CAST Sn-Cu capacitors are available, I will install these to replace the stock Sprague Bumblebee input coupling capacitors. I am also going to install .01uF/600V Arizona Capacitor Blue Cactus Mylar/Paper/Oil/Aluminum Foil capacitors to replace the stock Bumblebee capacitors in the power supply and bias supply circuits.

    As for the Western Electric A.I.W. 18ga wire, I will ask a work colleague to look for some while he is in Japan on a business trip in a couple weeks. I haven't found any in the U.S. yet.

    Special thanks to Yazaki-san for his generosity in sharing his wisdom and experience in achieving Real Sound, and helping the rest of us get there.


    • Hi Rich,

      I just saw Yazaki-san’s message, and I realized I had forgotten to respond to your message – sorry about that!

      I’m looking forward to trying the new resistors that Yazaki-san sent in my MC30’s, which I’ll report on, and be sure to let me know how they work in your MC240 too!

      Sounds like a great capacitor adventure you are doing with your MC240, and I really like your suggestion of installing the Duelund CAST Sn-Cu caps as input coupling capacitors, and I’m really looking forward to hearing your report on the result. The Blue Cactus should be really nice as well.

      You’re doing a lot of exciting things with your MC240, I can’t wait to hear how it turns out! 🙂

      Kind regards,


  4. Dear Rich-san,

    For preamplifiers and also power amplifiers, the cathode resistor for the first stage tube has the great power of influences
    for the final sound of these amplifiers like as the quality of power supply, I believe.

    I have long searched for the better sounding resistor but I just reached at this resistor, OHMITE WH / WN type.
    I hope you make up the test with your amplifier.

    Have a nice Resistor Adventure !!

    Best regards, Shirokazu Yazaki / Tokyo / Japan.

    • Jeff-san and Yazaki-san,

      Thank you for your responses. The Ohmite Brown Devil resistors that Yazaki-san had recommended for the McIntosh power supply have made a significant difference in terms of improved bass response and a dynamic liveliness. I would expect that the Ohmite WH/WN resistors for the input tube cathode will make further improvements as he has written. As great as the stock MC240 sounded, the updated components I’ve installed so far have just refined that McIntosh goodness in tone and timbre.


      • Rich-san,

        I have used Brown Devil and loved its unusual clear-cut and powerful mid to low range.
        But I don’t feel such kind of tone bias for this OHMITE WH / WN type.
        I only feel amazing information-rich sound throughout entire range. Now, I feel, I can hear every
        detail of music from my old system. But sorry that which would be better WH or WN, I can’t tell.

        If you installed this resistor, please wait a few hours or a day. It might be my first experiences
        about resistor. I’m now thinking the reason why.

        Shirokazu Yazaki

        • Hello Yazaki-san,

          I will start out with the Ohmite WN resistors and follow your instructions to burn them in for at least one day before I do any critical listening. The Ohmite Brown Devil vitreous enamel resistors in the power supply required some time to settle in–maybe as much as 20 hours of music playing.

          Thank you again,


          • Rich-san,

            That’s great !!
            I personally appreciate your challenge, thank you !!

            I’m afraid that you couldn’t believe and accept the results.
            Because that it would be so clear and transparent but some kind of
            tone balance would be changed.

            Anyway, you could find out another type of new ” Real-Sound “, I suppose.

            Best regards, Shirokazu Yazaki

          • Yazaki -san ,

            I don’t know you ..!!

            but I feel a GREAT RESPECT for throughout the inspiration that inspires us ….!!

            A GREAT RESPECT for your ”REAL -SOUND ” philosophy..!!

            You make our Grey Days …SUNSHINE !!

            thank you so much

            from a cold GREECE

            my Best regards


  5. Dear John-san,

    Thank you John-san, I’m so encouraged !!
    In these cold winter days, we can see beautiful Mt. Fuji far away from Tokyo, you can’t imagine.
    I love the such a fine blue sky and adore your Greek blue sea in the sunshine, I have never
    been before.

    And I love and have searched for such a real clear background of music.
    Thanks again!!

    Shirokazu Yazaki

  6. Well I finally was able to replace the two stock 3.3kohm Allen-Bradley Carbon composition cathode resistors on the 12AX7 signal input tube with the Ohmite WN wirewound resistors (10kohm parallel-wired with 5kohm). After playing for several hours, the resistors have settled in and I am impressed with the increased transparency, articulation and larger, deeper soundstage. It’s like a fine veil has been removed allowing me to hear more of the music. The improvement is much like the improvements I heard when I installed the Duelund DCA20GA and DCA16GA wire in my Class D amp. The music takes on a greater presence in my listening room. For any vintage Mac tube power amp owners, I highly recommend this switch to the Ohmite WN resistors on the input tube cathodes. Thank you Yazaki-san.


    • That’s great news, Rich, I’m definitely looking forward to giving them a try. That project is still a little ways from the top of my audio to-do list, but I’m hoping to get to it before too long!

      Kind regards,


    • Dear Rich-san,

      I personally appreciate your making the test, thank you so much!!
      I feel this resistor don’t have any defects for its character. But at present, compared to WN, WH would be better for
      my hearing. WH is the type of usual wire wound and so this simple structure could bring out this remarkable sound. I hope you try WH.

      I have long enjoyed ” Capacitor Adventure ” like as Jeff-san but now I reached to these essentially desirable
      resistors, such as ” Brown Devil “, TEPRO RA and OHMITE WH. I’m just preparing the article ” My old Model 7k “,
      it’s only my personal story for modification of Marantz Model 7 throughout more than 35 years for Jeff’s place.
      And it would be my ” Capacitor and Resistor Adventure”.
      Please look forward to —-.

      Best regards, Shirokazu Yazaki


  7. Im building some power cables for some vintage (and new) Luxman stuff I have been acquiring from Japan.. this site is a great resource!

    To “restock the woodpile” here, I have found a great service site, http://www.zenmarket.jp. They have been very easy to work with to buy things from Yahoo Japan, and hifido, audio union, etc. Only charge a 300Y service fee, and they will repack and consolidate shipments as necessary.

    • Thanks for the tip, Rich!

      I’ve tried to buy things directly from Japan audio shops before and I’ve been told “We don’t sell to the US,” so this could be a handy work around.



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