Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › Woo WA2 Tube Rolling Recommendations
New Posts  All Forums:Forum Nav:

Woo WA2 Tube Rolling Recommendations - Page 4

post #46 of 388
Quote:
Originally Posted by Skylab View Post
The stock tubes are the GE 6AS7GA? I do think the RCA's are better, and they are dirt cheap.
What's your dirt cheap source, becaues tubeworld.com is selling Black and Gray plate NOS pairs for around $80 and $65 respectively?
post #47 of 388
Quote:
Originally Posted by mmwwhats View Post
What's your dirt cheap source, becaues tubeworld.com is selling Black and Gray plate NOS pairs for around $80 and $65 respectively?
Maybe eBay?
post #48 of 388
i would hope that the RCA black/grey plates sound a lot better than the RCA/JAN black plates - because the latter sounded awfully muddled in the mids, and while they were really "tube" sounding they didn't have the clarity of the 6080s which are are pretty "tube" sounding in their own right. both tubes i agree sound more "tube" sounding than the 5998s though i still prefer those over what i've heard so far.
post #49 of 388
$10 each at Antique Electronic Supply - $5 each if you buy used!
post #50 of 388
Quote:
Originally Posted by Skylab View Post
$10 each at Antique Electronic Supply - $5 each if you buy used!
Thanks!
post #51 of 388
Thread Starter 
Oh bollocks....just received my NOS G.E.C 6080 black-plates. Unfortunately the base is a little too wide; a little frustrating given as the socket is labelled 6080

The pins go in, but not all the way; probably around 50-70%. I assume this is unsafe and may damage the tube and/or amp? Anyone know where to get some decent octal socket extenders (or socket savers I believe they are called)?

post #52 of 388
This is because the socket itself is below the chassis, not flush with it?

As long as decent electrical contact is made and it's not intermittent in any way, it's probably OK, but my guess is it won't be at 50% insertion.
post #53 of 388
Thread Starter 
Yes, the socket sits at a countersunk level to the cutout as seen below:



I just measured with an electronic vernier: the depth of the countersink is ~4.48mm; the entire pin length is around 10.8mm, but they are about a millimeter countersunk to the brown base, if you know what I mean. So from flush with brown base to end of pin is ~9.8mm. Also as you can see in the photo I posted above, the brown base is flat on the perimeter of the cutout, so the pins are not exposed to the elements (or sticky fingers )
post #54 of 388
Hmmmm...this sounds a little scary. I guess you may need to stick with the 5998's you ordered
post #55 of 388
Jack tells me my WA2 should ship out tomorrow, and it just has to make it from Queens to Manhattan.

Just wanted to let everyone know you should be seeing external/internal/tube glowing pictures soon as well as some preliminary impressions. Don't expect me to comment on the sound too much until I've had a couple weeks with the amp, though.

Also, I have 5998s, Bugle Boy 6DJ8s, and late '40s Amperex Holland 6V4s ready to roll. But again, I won't switch over to them until I'm familiar with the stock sound.

A little later down the road, you'll also get to hear what the WA2 makes of the new HD800s. Couldn't resist the temptation of my brand new high-power OTL amp combined with a new reference-class 300-ohm headphone, so I'm in on Headroom's first batch of pre-orders. I figure with the WA2, GS1000s, HD650s, and HD800s, I should be good for a while.

EDIT: Also, at this point I would like to give Jack props for quoting a build time to a customer and making it happen. This should be a foregone conclusion when buying a high-priced niche item such as this, but as we have seen time and again from other businesses, it seems to be the exception rather than the rule. I can't believe some of these other builders continue to have people make purchases with them, when they say something like 8 weeks (a long time already), and instead deliver in 6+ months (if ever). Granted, I don't have my amp just yet, but Jack quoted me a 4 week build time at the time of purchase, and if it does indeed ship tomorrow, it will mark 4 weeks and 1 day. Since I ordered it in the evening, and it probably needs to have been finished today in order to ship tomorrow, the build time for my amp was 3 weeks and 6 days. I'm just sayin...
post #56 of 388
Anyone hear/know anything about 6H13C tubes for the WA2? Jack has suggested using them with the WA2 if using K701 headphones, because the tubes output more power apparently. However, Jack hasn't responded to multiple e-mails asking if they improve the sound. Anyone know?
post #57 of 388
Thread Starter 
I also enquired about it a while ago. He said I would recommend it, as they sound better than the 5998A - bearing in mind that my WA2 shipped stock with a pair of GE-JAN 5998A's.
post #58 of 388
If it is more power you need, then the 5998 is the tube to use. Much higher GM than a normal 6AS7G. I always thought the Russian 6H13C had the same exact specs as a 6AS7...never looked though.
post #59 of 388
JayG, you're right about Jack's scheduling. My WA2 was shipped a day before the 4-week estimate he gave back in December.

It arrived yesterday, well packed, as everyone has mentioned. And absolutely beautiful - black. I got to admire it for a while as it returned to room temperature after riding around in the below zero chill we're experiencing in Vermont.

GE 6080 / Philips JAN 6922 / International Servicemaster (???) 6V4.

Very initial impression: even the break-period is going to be a blast. Detail and soundstage were impressive in the first minutes, and over three or four hours of listening, highs began to fill out. The Hoquetus cd by the Theatre of Voices was magical - vocal lines, spatial definition, tone color, DETAIL.

Tubes will roll, but for now, WOW.
post #60 of 388
I got the 6H13cs for the K701 per Jack's recommendation.

I can tell you that I don't have to turn the volume knob up as high with the 6H13Cs as I did for the stock tubes.

I haven't swapped the stock tubes back yet to compare them, so I won't comment on the sound. All I can say is it doesn't sound significantly worse, but may sound better. Just don't know.
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Headphone Amps (full-size)
Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › Woo WA2 Tube Rolling Recommendations