Hi Mizicke, the power consumption of the lf339 is roughly about 100 Watts but that's not count the high input current drawn by charging capacitors in 339 power supply at turn-on. I am afraid that 100W ups or any other AC power source will be too overloaded, triggering protection circuits in...

  On Radioactive website the amp is still offering with 21 days money back guarantee I would have tried.   If you looking for an amp with holographic with 3D presentation you should considering dual mono construction or better full dual mono designs. I would not mix tube/transistor- hybrid I...

  Thanks,   The Sibilance and harshness of trebles was my little worry especially when you pay large amount of money for such a product you expect to be perfect in every way.   My worries came true, at the time I bought HD800 I had only Burson and LF339 at home the Radon 222 was on the way...

Out of curiosity, most of time my Burson is hook to iMac so no driver needed no hassle at all but from time to time wants to bring my amp to bedroom and then connect with laptop so the question is, which Output Mode ASIO or WASAPI on player has to be chosen to obtain the best possible audio...

One more variant 6c5>>>6SJ7 and we'll have them all. Summing up their website need some update ;-)

  Radon – beginnings.   The amplifier had his little debut on 27th of April 2013 at the London Head-Fi Meet. Even though it was just a prototype, this rigid, inconspicuously looking box brought my attention for the first time.       I was able to hear it performing with a few top...

  Yep that's right, look they are the same twisted in pairs. Within pair of twisted cables color doesn't matter, on condition, if you use for example (white&orange) for power combined together (in order to reduce resistance and voltage drop) soldered to the pin 1 of the type A connectot  u...

I'm not sure if I understood you correctly but for me it looks like ground loops problem rather than faulty usb cable but I can be wrong. I choosed Ethernet cable for one reason, length, length....., much over 5 meters and low cost of course. It has all parameters to make it possible on...

Thanks Quote: I like that, nice and simple, beautiful headphones.

  thanks! It was my 5 old or so, canon d450 with EF 24-105mm lens, set on a tripod at low iso settings.

Not the best picture and not the best Hi Fi Rack ever, but current setup below with the new SHA 1.0 head amp, lend for one week but after 2 hours with hd800 I'm not going to sent it back.  

Is almost done, currently testing with newly arrived HD800 it needs small adjustment and that's it, but chronically lack of time and other duties slow down it a bit, be patient please ;)

Thanks a lot; I was asking because my next project in the near future will be tube amplifier, strictly DIY construction based on 6as7 family I have collected quite a large amount of their since purchase 339 so consider to use transformers which can handle more heater current just in case of...

Just out of curiosity how the "big boys" sound in your modded 337 in comparison with 6AS7?

Can't find the pic 69, there is hundreds of photos in this thread but non sorted by numbers, it doesn't matter. Do you mean the tung-sol 6336A ? no way 5A ! heater current could fry my transformers in a minute.The stock lf339 and also my can handle heater current up to 3A max.

Two completely different setup and same "problem" that sound weird isn't it? Maybe is time to visit a doctor and get some happy pills hahaha just kidding. Seriously it could be electricity, have you see any changes on glowing tubes, are they glowing as usual or some times darker or brighter...

I like the new look of LF339, nice vintage electrolytic capacitors, rare and great sounding I guess.

Hey guys, finally decide to buy second pair of headphones to pair with my Burson Conductor the HE-500 I only have mostly using with my LF339 tube amp and Conductor as a DAC section that combo make the sound of my Hifiman phones almost divine, cannot say the same when Burson is amplifying HE-500...

  No doubt it does if he 500 can be driven very well so 90dB efficiency he 560 will do so even better. The limiting factor can be slightly lower impedance of he 560 according to the manufacturer is only 35 ohm and for he 500 is 38 ohm but it seems to me that the information given in the...

I have tried ef800/6as7g in my system ring and I couldn't find the vocal presentation to be forwarded much, maybe a bit but changing the digital source will do. Still thinking that the combo is worth to have not only because is easy to get and relative cheep but for the sound, which is really...

I bought it off ebay http://www.ebay.ie/itm/Supra-CAT7-Network-Cable-Unterminated-per-Metre-/301154615865?pt=UK_Computing_NetworkingCables_RL&hash=item461e36c239 if you looking for a USB connectors too, you can get them from Parts Connexion,10$ for a set.

Lovely looks GEC set

+ 1

That's clear enough, thanks again.

Thanks MIKELAP,   So what I have to do is send them a photo of my audio system together with copy of my Invoice or proof of purchase, Is that is correct? They would send back a confirmation email?