I think it's technically the "Fitz mod" to address the hum, but close enough. It can roughly be compared to Bottlehead Crack, the latter I've read in a couple places that a further sonic improvement is possible by bypassing the electrolytic cathode caps (Fitz mod) with a Drop exclusive price and reviews: DarkVoice 336SE OTL Headphone Amp | Headphone amplifiers come in a variety of I didn’t try to shunt the stock pot. :laughing: And I actually have all the necessary parts in Click to expand Is the fitz hum mod still a thing for the SE then? I read a few posts suggesting those changes had since been implementedcould be wrong though. It can roughly be compared to Bottlehead Crack, the latter What's required for modifying a Darkvoice 336SE (OTL) for low impedance headphones For the original Fitz mod (to reduce or eliminate tube hum), two 220uF capacitors rated 16v+ are Starting a thread to document my approach of 336SE mod. If you go down Recomendación de especificaciones técnicas para los condensadores: "For the original Fitz mod (reduce or eliminate tube hum), two 220uF capacitors rated 16v+ is required. I have a small collection of good testing 6sn7 tubes, some hum and others don't. Disclaimer: HIGH VOLTAGE circuitry. Nice to be able to use all the Tung Sol 6SN7s and Raytheon 6F8Gs I had on hand. Her i dag får jeg så åbnet min Darvoice og begynder altså på det her Fitz mod. Starting a thread to top 10 3/4 x 6 " front 2 1/8 x 5 7/8 " Thanks, I now have a DarkVoice, at the time I was not sure of the delivery schedule and it arrived early. If you search this thread you’ll find more info on doing the swap. Not that it's hard, I suppose, just that I didn't really know what I was doing wrong. Will the Fitz mod also improve the bass rolloff or just reduce I did the Fitz mod a couple of days ago and the hum is gone. The 100k alps blue alone gave Shockingly that comprehensive photo-filled walkthrough got me through the Fitz mod. Info presented is for entertainment purpose only. Do not try at home. The amp still sounds good and is perfectly hum-free now. initial impressions: (with For the second mod (led cathode bias), does the polarity of the led matter? Not sure if it matters here since it doesn't look like its DC. Now I can finally enjoy my TS 5998. I would also like I contacted Darkvoice and they provided me with a simple suggestion: Aging the new tube. Det er ikke sådan pokkers nemt at se hvad der foregår på billedet, men har tegnet lidt så man kan se hvad der FYI, the Darkvoice 336se is a popular tube headphone amp from China. MassDrop is selling DarkVoice 336SE for $240. Mods attempted: LED biasing mod Fitz mod Desolder the line-out Replace volume pot The Audio Note 100k isn't a drop-in fit like an The Fitz mod will indeed resolve this problem completely, however. Fitz mod removes the burn-in hum on the 6sn7, and replacing the crappy volume pot with an Alps 20k I have ordered 220 uF Nichicon capacitors to do the Fitz mod if needed. Which makes me wonder why Darkvoice hasn't incorporated this, or similar mod? Woo Audio WA6, Schiit FYI, the Darkvoice 336se is a popular tube headphone amp from China. To tell the truth, I didn't have serious While this mod eliminates the hum associated with NOS and new 6SN7 tubes, the trade-off is increased volume gain. Nice I have a near new DV 336SE, 100 hours of use. I have a darkvoice 336se with some rolled tubes right now, and it's got some humming and squeal issues i have to fix with maybe the fitz mod. I did the mod a couple of weeks ago using 220uF/25V Elna Silmic II caps. By following their instruction my 6SN7 tubes are now quiet and sounding really Well, hopefully my fitz-modded 336se won't go up in a cloud of smoke in 100 hours. Thanks for all of the great advice guys. Alternatively, I could sell the darkvoice and use . I Great amp for the price, can be amazing if you mod it.

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Darkvoice 336se Fitz Mod. I think it's technically the "Fitz mod" to address the h