It has been a long journey, me, as a DIY in this “audiophile” (or “idiot-phile” world). Listening cable’s sound, capacitor’s sound, tube’s sound, resistor’s sound, et cetera. It sounds so stupid and silly for most people. What makes my DIY stuffs sound different from a boom-box which you could find easily on most electronic store (at affordable price)? Why someone must spend $100 or more for a capacitor or vintage tube? Why? If you are that kind of person, I would recommend to leave this page. Because all listed below are completely non-sense for you.

I spent a lot for this kind of stuffs. And now, I’m completely overloaded. I keep some of my stuffs to make sure I will have enough spare for my future projects. The rest of this “junks” must be thrown away (and transferred into cash) for another step of my DIY journey (which never ends).

Some of the pricing might not be cheap. This is due to shipment cost and tax issue. I envy you who lives around the Europe or USA. A lot of great stuffs are there, at reasonable cost. Here, we are stuck with shipment cost (and tax) which might be similar with the unit price itself.

Anyway, I’m not a seller of audio stuff. This is not my main business and I’m not selling in rush. So please understand if mostly I don’t accept any bargain. Even if I have a lot but I don’t want to sell for some reason, it will remain on my shelves. Please understand.

Drop me an email to if you are interested to purchase some of the item below.

All below photos are taken by myself and showing the real appearance and item condition. What you see is what you get. Click the photo for larger size.

PS: Some items already sold out! So I remove them from the list.

Custom PCB for 9-Pin Teflon Tube Socket

Tiring of wiring your 9-Pin Telfon Tube Socket? Plan to connect a bigger wire?
Originally designed for Yamamoto 9-Pin Teflon Tube Socket, but eventually this is also compatible with other Teflon tube socket to. The specification of this PCB is set at premium grade. This 2.5 mm thick red PCB has 2 oz Copper and TG170 grade PCB. All solder pads are through-hole type, double layer with Immersion Gold finish. The holes for the wire is 2.5 mm / AWG 10 (you can connect your giant wire here!), while the holes for the socket’s pin is 2 mm diameter. As this is double layer PCB, you can solder either on the top or bottom side. Feel free! Tracks itself are on the bottom side. Please confirm by mentioning your tube socket brand/type if you have any doubt if this will fit your tube socket. Detail explanation could be read here and here.

Condition: New, never used.

Asking price: US$ 5 (each, not pair).


Jensen 0.47 uF / 630 Volt and 1 uF / 630 Volt Copper Foil/Paper Tube Paper-in-Oil Capacitor

Jensen is also a long time player in the capacitor industry. They not only supply for the audio, but also for another high voltage application in the capacitor industry. One of their latest technology (not really latest)  is the capacitor with Paper based chassis. So instead of using Aluminum or Copper as other commonly use, they use Paper as the chassis material (very interesting idea). Inside, the technology also based on famous Paper dielectric (in-Oil) with Pure Copper Foil material. Actually, Jensen has 4 chassis type. From the cheapest to the most expensive, Aluminum, Paper, Copper, then Ceramic. Aluminum may cost around US$ 40 each (for 0.47), while the Paper will jump up to around US$ 100. Copper and Ceramic may cost 10-20% more from Paper.

Condition: New, never used. I will not sell the already passed break-in period, since this capacitor is my current reference for “affordable” capacitor (below my current reference, Duelund CAST Ag).

Asking price (2 pcs or 1 pair):
Rp mail me for latest price  (0.47 uF / 630 Volt).
Rp mail me for latest price (1 uF / 630 Volt).


Jensen 4-pole Electrolytic Capacitor 470 uF / 450 VDC

Jensen announces their new innovation in the capacitor industry, the 4-pole capacitor. This is not like ordinary multi-pole capacitor with multiple capacitance. This capacitor only has single capacitance, but has 4-poles: One positive input, one negative input, one positive output, and one negative output. What is the point of this? To separate the previous stage (connected to positive/negative input) and next stage (connected to positive/negative output) in your power supply rail (with the Jensen on the center). So basically this Jensen 4-pole will act like an inter-stage transformer which will separate the before and after stage where he is installed. Quite sensational, eh? Best used on the C2 position, to provide ample capacitance and separate unwanted noise  between C1 and C3. The overall sound of this capacitor tends to be very neutral, plain, perhaps almost no character. Wait after it passes the 200++ hours break-in period, and you will get a very dynamic, clean, smooth, and details from low mid to high, but still remains neutral.

Condition: New, never used.

Asking price (1 pc): Rp mail me for latest price



JAN Raytheon 5842 / 417A Vacuum Tubes

Tube 5842 or 417A is a high transconductance single triode in miniature construction. The design also features low noise (beside high transconductane and medium mu), which is suitable for a single stage design to drive power tube, example like 2A3 (you can search for the schematic around the Internet). So instead of using more expensive 6SN7 or 6SL7, you can try different approach with this single triode miniature tube. The 6.3 volt heater only consumes 300mA of current. With amplification factor of 43, you can have a lot of design possibility. Also, not to mention it’s reasonable price. Reason for selling this is I got enough on hand (check picture).

Condition: Was bought several years ago, claimed as NOS by the seller, but can see some burn marks on the top glass silver getter. Although this burn marks doesn’t always indicating an used tube, but it’s fair enough for the buyer to understand first. Check picture for detail.

Asking price (1 pair): Rp 500.000. Stock for sale is 2 pairs only.


4-DuelundLabel 1-DuelundCASTCustom 2-DuelundLabel

Duelund Coherent Audio VSF Cast PIO Copper 1uF or 0.47uF / 630VDC – Special Custom Edition

Duelund VSF Cast PIO Copper is the ultimate capacitor that money can buy in terms of the musicality. The music flows flawlessly at excellent timing, pace, and rhythm. The tone is just right, not too sweet like Jensen Paper Tube, but not too ‘cold’ like VCap TFTF. The staging is impressive. I would say the tonal is like Mundorf Supreme Silver Gold Oil, but with a lot of extra steroid in terms of musicality. Definitely an excellent choice for ultimate system. I have done several review at here and here. External review from Tony at Holland could be seen here. Be noted that this Duelund VSF Cast PIO Copper is custom order by me directly to Duelund. It has bigger size (around 8 cm diameter and 2-3 cm height) than most available capacitor on earth – so mind your space. The size will follow with the value, so surely 1uF version is bigger than 0.47uF. The lead also has been upgraded by using Duelund 2.0 Silver/Silk cable (well known as Duelund 2.0 interconnect cable). You will never get this version available anywhere on the Internet (except if someone is selling this as second hand, probably upgrading to the Silver/Ag version). The only way to get this is by ordering directly to Duelund. As other custom order, the price is very expensive and you have to wait minimum 2 months in order for Duelund to produce. Even you have so much money to pay more, you will not get this product faster. I have two values (1 pair each): 1uF/630VDC and 0.47uF/630VDC. I plan to use only one pair of them (both values are usable for me). So you will have opportunity to select whether you need 1uF or 0.47uF.

Condition: New, never used.

Asking price (1 pair): Drop me an email if you are really serious! But surely it’s not gonna be cheap 🙂


Knight 600B Emission Based Tube Tester

One of the most popular, easy to use, and affordable Tube Emission Tester, the Knight 600 Series. This will test for the emission for almost all of your tubes collection, from #26, 5U4, to 12AX7, even it covers some socket which both me and you might not (or never) familiar with. Physical condition is perhaps not really good. Comes with original wooden box and handle (some rust here and there). Unit is working, but I think it will need some calibration and good step-down transformer (this one has 115 Volt input). This is a nice tester, but only for “go-and-no-go” quick decision. I’m selling this because I don’t have any use of having two tube testers. I will keep my Hickok 539B as my future tester. One is enough. I have some copy/printed manual and also additional tube data (which not listed on the roll chart) for this Knight 600B and will give to the new owner. Off course, you can always use the roll chart for most of the time, if your tube is listed there.

Condition: Need some calibration and wood working, considering this is over 40 or 50 years old unit. Unit power on and can be used to measure tube for emission. But for best result, I would suggest to do some calibration (which is not too difficult if you know some about electronics).

Asking price: Contact me! Only for serious buyer who knows what he/she is buying!

Your thoughts here
  1. ok thank a lot…
    ini email saya
    kasih email bro jimmy ato no telp
    sekalian tanya harga duelund
    saya sekarang pake audionote tapi gak terlalu suka sama hi nya
    pgn nyoba merk lain

  2. Dear Jimmy,
    I am interested to buy one or couple of AD1865 N-K new serie(0749 or similar).If you have these for sale or any tips where to buy original one. Thank in advance.
    Best Regards

  3. Hi Nedi,
    It’s kinda rare and hard to find, I think…

  4. Hi Jimmy,
    Thank you for answer.

    Cheers, Nedi

  5. Pak Jimmy

    Saya berminat dengan Tube Tester Knight-600B.
    Boleh tau harganya brapa…..
    Mohon di info via sms: 081265750808
    atau email sy:


    Suwito Bastian

  6. Hi Pak Suwito,
    Saya sudah email ke Bapak.
    Terima kasih.

  7. tolong tanya no hp dan pin bb. trims pak

  8. miniwatt N3 cari dimana ya? Ada yg bisa bantu cari??

  9. Hi, bung Jimmy
    Saya baru rakit pre amp 12ax7 tapi vokal kurang open caps pake pio k75 dan viva ga, gimana karakter viva gad mkp? Bisa minta e mail nya

  10. Klo biar vokal lebih open caps diganti apa? C1 nilai 0,47 c2 nilai 4,7 . thx

  11. Hi Pak Ferry,
    Coba caps Russianya diganti dulu dan dengarkan apa ada perubahan?
    Email saya harusnya ada di halaman depan, sebelah kanan. Saya tidak share disini lagi karena suka ada spam.
    Terima kasih.

  12. Hi Jimmy. I’d like to purchase 10 units of that awesome noval socket board. Would you consider overseas shipping? I am willing to pay the full cost of a registered economy mail. Willing to send PayPal payment as a gift, to show you that I am not a fraudulant PayPal user. If the boards meet my needs, I will purchase more. Kind regards, Max

  13. Jensen 470uf 4 pole capacitor masih ada?

  14. Maaf Pak Rudy, kebetulan sedang tidak ada stoknya.
    Terima kasih.

  15. Pak, saya minat sama caps jensen 0,47uf nya, minta contact numbernya boleh?

  16. Hi! I am interested in buying these Duelund Coherent Audio VSF Cast PIO Copper 1uF pair? What is the price for pair of 1 uF?

  17. Hi,
    Drop me an email please.

  18. Saw in a past blog you were using Mundorf 4 pole. Assuming they would have been snap ins based on your time frame. I have some I am using and cannot find a pin out for them. The newer Mundorf 4 poles use a tinned copper lead on their poles which seem to have a different pin out. The Snap-ins fit Peter Daniel PSU boards which are configured for Jensens. Did yours follow the same pattern or did you have to change it when you swapped them out for Jensens.

    Thanks for any info you can provide,


    James Whiting
  19. Hi James,
    I don’t think I use Mundorf 4-pole. I remember I use Jensen 4-pole and standard Mundorf.
    Mundorf normally will mark the pin’s polarity on the side. So you can easily locate which is IN/OUT and +/-.

  20. Hi, let me know via email if Duelund CAST 1uf are still available.
    I want them 😉

  21. Is there a possibility that you will sell some assembled diy stuff?

  22. Hi Eric,
    At present time, I have no plan about that. But do drop me an email to discuss more.

  23. Mas jimmy ada gak review nya yang pakai bahasa indonesia?

  24. Hi Mas Wowo,
    Maaf untuk saat ini saya lebih banyak menggunakan Bahasa Inggris.
    Terima kasih.

  25. I am looking to purchase some mundorf or Jansen coupling caps.
    Silver / Gold oil filled coupling caps for my Cary sixpac tube momo amps

    2.00 uf 400volts x 2 caps
    1 uf 630 volts x 2 caps
    10 uf 630 volts x 6 caps
    . 22 uf 600 volts x 4 caps
    Please inform me the cost + postal codt to australia
    Kind regards
    Francis jansz
    E mail :

    Francis Jansz
  26. mas jimmy saya mau order, Jensen 0.47 uF / 630 Volt apa masih ada? mintak no tlp..

    i wayan dwita
  27. Bli Wayan,
    Sudah saya email yah.
    Terima kasih.

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