post #166 of 242
3/23/06 at 2:22pm
Originally Posted by madmax7
Any suggestions on the best way to hook up an Ipod G5 to the woo3? I have heard conflicting opinions on the headphone jack vs. line out..
Originally Posted by Gradofan2
Re: the various posts reporting the hum in many of the 6BZ7/6BQ7 tubes - I recently bought a pair to give them a try... and experienced the same hum right out of the box and warmed up.
I noticed the tubes were somewhat loose in their sockets compared to the stock tubes. I thought the hum might be due to some type of poor connection, or ground problem with the seating of the tubes. I tried reseating them, and switching them back and forth - still heard the hum.
Then I carefully spread each prong on each tube just a fraction, to create more friction between the prongs and socket... and I applied some Pro Gold Contact Cleaner/Enhancer (Walker SST would likely work better)... reinserted the tubes in their sockets and let them warm up.
"Voila" - the hum was gone. I don't know whether it was the improved fit, or the burn-in of the tubes, or both... whatever, it resolved the hum problem.
Try it and see if it works for you - because these tubes do have a pretty good sound for a bargain price ($1.50 to $6.00 (tested/matched) / tube). They seem to have a bit more dynamic sound - faster, brighter, more detail, and perhaps a bit more bass slam than the stock tubes - although, perhaps just a bit leaner sound (when still not fully burnt-in)... than the Amperex 6922's.
Just a suggestion for those who may have had the hum problem with the 6BZ7/6BQ7 tubes (or perhaps any tube).
Originally Posted by jamato8
The tubes that are the input or driver tubes are the 6922's and the power tube is the 6080. I am using some Amperex PQ A frame made in Holland. I was lucky when an old TV repair store, that hadn't dumped their tubes, had a bunch of nos Amperex 6DJ8's in PQ, Bugle Boy, A frame, white label, orange globe and gold pin. But out of all of these some of the best 6DJ8's I have heard are some that are marked Amperex that are Russian from 1982. These tubes are unbelievable and not all that common and often passed by when available.
Originally Posted by drarthurwells
I found some Russian military tubes of the 70s that are great for me.
They have the rocket symbol on them as a military designation
Wonderful clarity and make the music come alive.
Bought a bunch.
Originally Posted by mourip
Did you buy them online? Any chance of sharing the source?
Thanks a lot,
Originally Posted by lglyoung
After some 15 hours and acclimation to the sound and tonality of the WA3, I found the music too subdued and laid back, and noted that the punch and slam with certain instruments was not there when I was listening intently. I experimented with copper foil tape around the bases of the 6922 and 6080 tubes. This does mimic the older metal base tubes. The dynamics picked up and I got back a small degree of gongfu slam and punch. Much better music tonality. Have any of you tried this?