Ichinichi
1000+ Head-Fier
- Joined
- Feb 11, 2007
- Posts
- 1,064
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- 11
damn it! then are there no date codes for miltary tubes?
Originally Posted by Rob N /img/forum/go_quote.gif The code should be etched on the glass near the base of the tube See here for Philips codes |
Originally Posted by blessingx /img/forum/go_quote.gif Well, I think the 5U4G is actually too punchy, but either it (it's the only rectifier I have) or the amp seems to require a bit more source output to perform well. I'm turning the Lavry variable output up higher than I have with any other amp to get a good sound and others have told me the same (if you have a similar option you may want to try it too). I'm still in burn-in (probably at 25-30 hours), but it certainly has changed a decent amount since I first turned it on (but again the change may be the amp and/or tubes). I'd give it a little more time. Anyone know which rectifier would be best to get a more balanced/less tubey sound and more detail? I like the Woo6 in many respects, but these are my two issues... at least at this burn-in time. Rad212, do you think the 5AR4 or 5U4G (maybe after more time) has greater detail, resolution, etc.? |
Originally Posted by sacd lover /img/forum/go_quote.gif For rectifiers I like the 5u4g myself. The sound quality is very good to excellent and these tubes are reasonably priced for the most part. The older coke bottle shaped 5u4g's are better sounding than the later straight bottle 5u4gb's in my experience. |
Originally Posted by blessingx /img/forum/go_quote.gif Thanks much sacd lover. As jamato8 said, great info as usual. I noticed the Sylvania brown base 5931 appears to have a wide base. Could you give us a quick measurement of the diameter? I looks like it may be an issue with the WA6 plate opening depending. |
Originally Posted by rlanger /img/forum/go_quote.gif Great info SACD, thanks. Do you think that a NOS Mullard would be a significant upgrade to the Sovtek 5u4g that I received with my amp? |