Dusty Chalk Posted November 25, 2008 Report Share Posted November 25, 2008 I think I've seen the EL86 used for something recently, but can't remember... Quote Link to comment Share on other sites More sharing options...
crappyjones123 Posted November 26, 2008 Report Share Posted November 26, 2008 arent the el34's used in the bh? i faintly remember mike saying that he was looking for toobies for his amp. dont know if these can be used. Quote Link to comment Share on other sites More sharing options...
spritzer Posted November 26, 2008 Report Share Posted November 26, 2008 The BH uses EL34's and if the RCA's are really Mullards then they are very good tubes. They need to matched and tested though before even coming near the BH. Quote Link to comment Share on other sites More sharing options...
pabbi1 Posted November 26, 2008 Report Share Posted November 26, 2008 Yes, we have learned that the hard way, eh? ;-) Quote Link to comment Share on other sites More sharing options...
spritzer Posted November 26, 2008 Report Share Posted November 26, 2008 Yeah. \ I recently checked most of my Mullard stock and one of them is borderline so it's a good idea to have at least a tube checker handy. That tube has seen a lot of use in the old BH so may it rest in peace. Quote Link to comment Share on other sites More sharing options...
Elephas Posted November 29, 2008 Report Share Posted November 29, 2008 Let me know if you need help identifying EL34 tubes. I have a PDF with descriptions and photos of most EL34's. Quote Link to comment Share on other sites More sharing options...
dsavitsk Posted November 29, 2008 Report Share Posted November 29, 2008 None of these (other than the EL34's) appear particularly valuable. Tung-Sol 7867 These are about equivalent to the 6CD6GA. Decent power tube, but has a lowish screen grid limit. Could be used for a few watts in a power amp -- I wouldn't both for headphone duty. http://frank.pocnet.net/sheets/127/7/7867.pdf Here's a schematic using one, which you'll notice uses a lot of your tubes which may not be coincidence: http://www.triodeel.com/du1a475.gif 25C5 Another low power output pentode (much lower power than the one above). Might be useful for a transformer coupled SE amp of some sort -- good for a couple of watts pentode, or less than a watt triode. http://frank.pocnet.net/sheets/127/2/25C5.pdf Sylvania EL86 [box] Close to an EL84, lower plate voltage iirc -- one of them is not going to do much for you. Quote Link to comment Share on other sites More sharing options...
recstar24 Posted November 30, 2008 Report Share Posted November 30, 2008 welcome to head-case dsavitsk! Your DIY expertise will be greatly appreciated here. Quote Link to comment Share on other sites More sharing options...
dsavitsk Posted December 2, 2008 Report Share Posted December 2, 2008 welcome to head-case dsavitsk! Your DIY expertise will be greatly appreciated here. Thanks for the welcome! Quote Link to comment Share on other sites More sharing options...
n_maher Posted December 2, 2008 Report Share Posted December 2, 2008 Thanks for the welcome! I do not recognize you without your avatar. Quote Link to comment Share on other sites More sharing options...
dsavitsk Posted December 2, 2008 Report Share Posted December 2, 2008 I do not recognize you without your avatar. Better? http://www.youtube.com/watch?v=RzOQbmtzw2U Quote Link to comment Share on other sites More sharing options...
Pars Posted December 2, 2008 Report Share Posted December 2, 2008 Better? Oh, much! Welcome to HeadCase! Quote Link to comment Share on other sites More sharing options...
n_maher Posted December 2, 2008 Report Share Posted December 2, 2008 Much, thanks. Now we'll get to work on some sort of crafty custom title for you. Quote Link to comment Share on other sites More sharing options...
Knuckledragger Posted December 2, 2008 Author Report Share Posted December 2, 2008 Oh, right. This thread. I, uh, still haven't taken any close up pix of the tubes. I might borrow my friends EF 100mm F/2.8 Macro lens for the purpose. I've been woefully busy tearing out the ceiling of my garage and installing insulation, which is not a job I wish on ...most people. While clearing stuff out to make room for this horrible project, I found two boxes and briefly thought I'd discovered another stash of tubes: No such luck, they're old projector bulbs, for 1960s-era slide and film projects. Pretty cool, but of no use to audio snobs. I'd better keep them away from Mikhail or he'll incorporate them into his next DAC. Aaaanyway ...back to the salt mines with me. Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted December 2, 2008 Report Share Posted December 2, 2008 more likely into a cable. more likely an audiophile approved light bulb Quote Link to comment Share on other sites More sharing options...
Dusty Chalk Posted December 2, 2008 Report Share Posted December 2, 2008 Moar lah-klee a spee-kuhr. (They actually did used to use light bulbs in crossovers.) Quote Link to comment Share on other sites More sharing options...
kirkwall Posted December 3, 2008 Report Share Posted December 3, 2008 The Cary SLI-80 variants use 5U4GBs as rectifiers (mine had the RCA as stock) and both the RCA and Tung-Sol have good reps in that application. Great find anyway -- and good luck with those pesky flying squirrels. I had reds in my attic last summer and their warfarin-preserved bodies persist in the insulation and heating ducts. And forget about using them as EL84 subs. Those fluffy tails heat up but fast. best, o Quote Link to comment Share on other sites More sharing options...
Dusty Chalk Posted December 3, 2008 Report Share Posted December 3, 2008 Besides, the pinout's all wrong. Quote Link to comment Share on other sites More sharing options...
Knuckledragger Posted December 16, 2008 Author Report Share Posted December 16, 2008 I finally got some decent shots of these tubes. Here's the first five: RCA 2A3 Tung-Sol 5U4GB RCA 5U4GB Tung-Sol 12AU7A 3M 12AX7A Quote Link to comment Share on other sites More sharing options...
Knuckledragger Posted December 16, 2008 Author Report Share Posted December 16, 2008 Sylvania EL34 RCA EL34 #1 RCA EL34 #2 GE ECL86 Quote Link to comment Share on other sites More sharing options...
JBLoudG20 Posted December 16, 2008 Report Share Posted December 16, 2008 How much you want for the knobby gloves? Quote Link to comment Share on other sites More sharing options...
Knuckledragger Posted December 16, 2008 Author Report Share Posted December 16, 2008 How much you want for the knobby gloves? You glove your own knob, buddy! Quote Link to comment Share on other sites More sharing options...
kirkwall Posted December 16, 2008 Report Share Posted December 16, 2008 Great shots! I wish I had a squid to hold my tubes. The Tung-Sol AU7 can sound very good, and the RCA EL34s too. Is "FW" a Phillips factory code? I've seen it on Amperexes and Valvos, and on some other RCA tube types, though I don't have many EL34s. Thanks and congrats again on the find. k Quote Link to comment Share on other sites More sharing options...
spritzer Posted December 16, 2008 Report Share Posted December 16, 2008 Those EL34's are definitely Mullards, most likely XF2's or XF3's. You can see the markings etched into the glass on the RCA tubes on the bottom left side but I can't read it from the pictures. Quote Link to comment Share on other sites More sharing options...
Icarium Posted December 16, 2008 Report Share Posted December 16, 2008 Nice.. jackpot! Quote Link to comment Share on other sites More sharing options...
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