Originally Posted by m0b1liz3
I thought that this build was going to use "pencil" tubes. Isn't that the same sized tube from the SOHA? Hard to put it all in perspective....
See my post here WRT pencil tubes
Is says it all. Take a 3" x 5" (or 120mm X 75mm) index card and look at it. Now imagine this whole headamp on that card. And look at its features, flexibility, design & likely cost.
Thanks dB! How'd you like to build one
> Cool, how easy would be to debug something like that, i can spot only like 3 test points.
Heh, I think there may only be one labelled TP... The rest are used spots (SG, etc.). Dude, its a small board... And crammed. Runeight may add a few more TPs in 1st production run PCBs, that's up to him.
There's an easy answer here: Make no mistakes & assure all your parts are functional (and proper values) prior to installing
But seriously, getting voltage readings for runeight to diagnose my wrong OB parts was not hard.. Just had a zoomed image of PCB w/traces & schematic & a steady hand for test probes.
BTW, listened some more.. My build has ZERO noise. Only thing is a little (expected) hiss when vol turned wwwaaayyy up (about 3X louder than I could bear - starting near full volume). The hiss is far less than the hiss from the LINEOUT of an IPOD when it is powered on (ipod lineout hiss is several times "louder"). This is expected & again has no affect on music at any sane listening level.
I'm really liking this thing... Chilled to some Norah Jones last night & with eyes closed she was in the room
. Need to box it up & spend some time with it, but hard to imagine someone listening to it and not being impressed. And its sooo small for a tube headamp
I could be slightly biased tho, so again builders/listeners all have their own tastes. BUT you can roll a bunch of popular low & high priced tubes in this amp. My EH has range in it for example... Plenty of bass & treble extension. My Raytheon CK5814A, a fav @ 40V in my SOHA, may not be my fav @ 80V in this, but does lend an interesting texture to the sound. My gut feeling is this amp will sound like its tube... Which is what you want out of an amp.