Hi, are these compatible with the MK III ?   Speaking of the PSVANE tubes that Nkoulban had mentioned earlier.

Sorry, this is the I meant to send.   http://www.headfonia.com/sophia-princess-upgrade-for-the-wooaudio6/

If you haven't seen this already...   http://www.headfonia.com/wooaudio6-tube-amplifier/

Thanks Infinity,   I just received some Mullard M8100's that I'm looking forward to trying.  I figured if I could upgrade the power tubes why not.  Even though it is only ~15%.  But it sounds like Little Dot and yourself think it's worth while so, I'll pursue that path with patience, as...

Thanks Little Dot!

Hi Infinity,   I assume you're talking about the 6H30P-DR's?  Gold Pins.  Do you have a model number and source.     I'm new to the tubes and find it really confusing figuring out what matches to what tube etc.    Any guidance is most appreciated!   Thanks!

Does anyone know if the Power Tubes were ever reviewed?  I saw one posting suggesting the 6H30P-DR's but way to expensive!