XLR is converted to SE internally, I would just do SE input

Thanks for confirming. Mike at Woo said it's normal too. It is still strange why Woo implemented this way.

I can hear noise from the headphone connected to WA5LE v2 even if the amp is powered OFF. I am using HD800S with HP Power L, impedance H, level L. If I switch HP Power to H, the noise is gone. This noise always persists even if I remove all tubes after powering off the amp. This is not from the...

Just got my HD800 cert. SN: 09xxx. Seems mine still has the nasty 6K peak.    

Just put my fully modded X-Fi for sale on ebay: Creative SoundBlaster X-Fi Elite PCI Sound Card Modded - eBay (item 300329902540 end time Jul-19-09 15:39:43 PDT) I have built an external DAC and now only need a sound card with good quality SPDIF digital out, so I switched to E-MU 1212M (only...

Quote: Originally Posted by Anavel0 @ eboy2003 Did you do any other mods to your MK III? Because it definetly doesn't look like mine. Specifically the absense of the 3 Rubycon caps, I also noticed some others do not look the same either. Or maybe it was just an older revision? I know...

Yes.

Quote: Originally Posted by SemiAudiophile i want to run the 6H30 family of power tubes. what kind of resistors do i need? and where to get them? HELP pleeasssee. You can use my MK III board picture as reference, the 120ohm resistor is the one near the green ERO 0.22uf...

The heater pin for 6H30 is pin 4 and pin 5. You can see 6H30Pi datasheet here. MK III also uses unregulated AC for 6AK5 heater, so you might also need to put a resistor in. I haven't tried that yet, but rough calculation is about 3-4ohm for 6AK5. 6AK5 heater pin is pin 3 and pin 4. The MK...

Quote: Originally Posted by punk_guy182 Eveer thought of making your own amps and compete with Little Dot? No, I think use MK IV as the base to mod and improve sound quality is much better and fun. For DIY projects, chassis and transformer is not easy to get quality like Little...

Quote: Originally Posted by Penchum I think what we see in the above pics, is all related to running two sets of 6H30's (until dead) without doing the resistor mod. This is not true. I did the 120ohm cathode resistor mod on MK III before putting on the 6H30Pi-EH. One of the...

Just report the story of my continuing mod for MK IV. MK IV uses unregulated AC for 6H30Pi heater, so put a resistor of 1 - 1.2ohm in series is absolutely necessary if you are using 110V AC version but your AC is actually 120V. For 6AK5 heater, it uses a 7805 + 2 IN4001 on the ground to...

Just report the story of my continuing mod for MK IV and MK III... Edit: Not mean to hijack the tube rolling thread, I moved my MK IV mod to MK IV SE review thread here, since the mod is not necessarily related to the tube rolling requirement and more MK IV specific. And I finally take...

Quote: Originally Posted by gilency they are gone! I am the seller, I have another pair of Sylvania 6AK5W black plate round halo getter, NOS military tubes on sale: Sylvania JHS 5654 6AK5 EF95 Matched Pair Little Dot Amp - eBay (item 300270669264 end time Nov-09-08 13:21:46 PST)...

I am not blaming Little Dot, with USD:RMB exchange rate dropping to 6.8 comparing to 7.3 a year ago, the manufacture will have to cut some cost if they choose not to raise the item price here in US. I will upgrade all caps and resistors myself to have better matched pairs anyway. :-)

Quote: Originally Posted by twc5964 Eboy, Just want to clarify the 1ohm resistor mod also applies to the MKIII and you attach it just like in your photos for the MKIV ? Yes, this applies to MK III as well, although for MK III the board is more tight fit and harder to take out. I...

Wow. That's impressive. But I'm not sure whether MK IV will have enough space to fit for this many caps. I'm currently thinking of using sonicap gen 1 from sonicraft. They got good review in cap notes. I tried them in my DIY 2 x AD1955 DAC and they sounds fairly neutral. Anyone has experience...

Quote: Originally Posted by eboy2003 Can anyone recently bought MK IV or SE check whether your board have Dale resistors, Mallory and Solen capacitors as advertised? I bought a MK IV (non-SE) version three weeks ago, and found the board is full of normal 5-band resistors, and use...

Quote: Originally Posted by Pricklely Peete Thanks eBoy, Yes Pench that added voltage will shorten the life of the tubes. I know it doesn't seem like much but the AC line voltage where I am has me concerned about my one and only pair of DR's. It could knock as much as 50% off the...

All right, I've done mod for my MK IV. MK III mod will be similar. Folks, this is a must mod especially for MK IV SE users here in US, otherwise, you will run risk of burn out 6H30Pi-EH like mine does. MK III and MK IV runs power tube heater unregulated AC straight from toroidal transformer...

Quote: Originally Posted by eboy2003 follow up: I add on a 9-pin tube test socket and measured the heater voltage of LD MK 3 and MK 4. The voltage starts at 7.0V AC and then slowly drop to 6.8V AC. A little bit high but seems still within the limit. 6H30 spec says heater voltage 6.3 +/-...

Can anyone recently bought MK IV or SE check whether your board have Dale resistors, Mallory and Solen capacitors as advertised? I bought a MK IV (non-SE) version three weeks ago, and found the board is full of normal 5-band resistors, and use Rubycon instead of Mallory, even worse, the output...

Quote: Originally Posted by eboy2003 That's one tube gone bad. I had similar issue before, even I didn't try the 6H30Pi-EH before the resistor mod. One tube output volume start dropping and distorting after one minute or so, and I can feel that tube is a lot hotter than the other. I...

Quote: Originally Posted by One Fan To Another Hmm, I'm having an odd problem with my Electro-Harmonics 6H30Pi tubes in my Little Dot III amp (I've done the necessary mod to use these tubes in that amp properly). Before doing the mod I slapped the EH tubes in the amp just to see that...

Quote: Originally Posted by sonda2008 Thanks a million DoA I've just purchased some tubes from him/her (Yen). As far as I know, these are very old sylvania 6AK5 black plate big flat D-shape getter black paint print ones probably dated in late 40's early 50's. I only have one of...