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easyone

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Everything posted by easyone

  1. Thanks for the input. I have read that page on Vivatubes about ID methods. Still leaves me in the dark on these two tubes. I have read lots of stuff at radiomuseum.org and tubemuseum.org but there are always tubes that do not seem to be easily identified by the normal methods. I did see some info on a Selectron tube by RCA, but it was a memory device and not a 6V6 tube.
  2. Here is another tube that has me stumped. Anyone got a guess on this U78 tube's maker? No markings on the glass that I can find and just the U78 and "HB 9" painted in a box. Most likely not a USA brand. ????
  3. Does anyone happen to know what company manufactured the Reliable Selectron 6V6GT tube in the pics? Any help would be appreciated. My first guess would be GE because of the dots above and below the "6V6GT" lettering on the top of the tube. Does anyone know what the "AE 743" written on the base means?
  4. Are you thinking of Brimar? I think the tube was made in Japan at a facility Mullard helped set up - because of the cross seams on top. I read that the seams on top were a sign of a Japanese makers tubes. I cannot remember where I read that.
  5. Do you mean etched into the glass? There are no etched numbers. Only those you see in the pics.
  6. Does anyone know how to ID where this tube was actually made and by whom? I have found conflicting opinions around the web when I searched. There are cross seams on the chrome top of the tube.
  7. I am in the same situation. It is frustrating to read online the multitude of techniques to try and determine a tube type. Most explanations are very technical and WAY over my head. I have read some guides to dividing tubes up by the number of pins and then trying to narrow it down by looking at pictures online of tubes with the same number of pins and similar plates. That would take forever. I have also seen a post that mentioned putting the tubes in the freezer and then quickly looking at them after freezing them to see if a number appears. That sounds sketchy. Here are some pics of a tube that I have that is an 8 pin tube that might be an EL34? Not sure. Anyone have a guess? The tube has no markings at all. I am afraid to test any tube without knowing the right info because the tube can be ruined if the settings on a tester are not correct. At least that is what I have read.
  8. Does anyone know the meaning of older Sylvania tube date codes? I am looking at some 6v6gt tubes that have a "113". Maybe 1951 the 13th week? Or 1961? Any help would be great!
  9. I have several older Tung-Sol tubes and it was driving me crazy that "no one" seemed to know what the lettered date codes signified. I called a Tung-Sol technician at the Tung-Sol headquarters, and apparently Tung-Sol was bought out in 1967, and then changed hands a few more times since then. The lettered date codes - 322DR3 as an example - would have been before 1967, but that is all he knew about it. "The date codes were not handed down" is what he told me. The tube I am looking at right now is a 6SL7GT which started production in the early 1950's according to the technician. That means it is from somewhere between the early 50's and 1967. The 322 = Tung-Sol and the DR3 is the unknown date. Any guesses on the DR3? I would venture to guess the "D" is the year and the "R3" a more specific time of that particular year. I guess we will never know unless an old Tung-Sol employee reads one of the hundreds of posts on many different tube forums. C'est la vie!
  10. Maybe I missed it, but did he tell us exactly what tubes were being used in the amplifier? The exact tube types and the quality of the tubes would have a major impact. I also heard sample B as being set at a higher volume especially in the 2nd test riff. I did not play the samples on a hi-fi system, so I really did not hear the guitar samples with a quality that a good system would provide. I guessed the answer correctly mostly because of sample A being a more subtle and rounded off sound. The B samples sounded more engineered to me so I figured it was probably the filtered sound on the newer amp.
  11. Thanks for the input. I would guess long plate also based on pictures I found on tube seller websites, but I do not know for a fact they are long plate.
  12. Thanks for the diagrams they are helpful. I am still wondering about specifics like - Is the tube a long or short plate? Is the plate ribbed? What type of getter might the tube have?
  13. Hello all, I am starting to go through all my tubes and would like to get better at identifying tubes more specifically. Things like plate and getter types. As an example I am looking at 2 RCA 12ax7 tubes and do not know much more than that. Could someone please help me understand a few of the things that are identifiable with my eyes - and a magnifying glass. As far as the getter types - am I supposed to look at the plate on top? If so, it can be difficult to see them because of the grey frosted glass in the tops of the tubes. I will post a few pics and hopefully the pics show enough info for a quick lesson. Any info would be greatly appreciated! The tubes look to have black plates. The camera flash or open aperture makes some of the pics look like the plates are grey.
  14. Thanks, that answered my question. I am not going to use them, just selling them. Backup parts that were taking up space.
  15. I was hoping to find out which heritage speakers the K-77 tweeters and K-55-V drivers are a match for?
  16. How big is the room and what wall do you have the Cornwalls on. I have had severals sets of Cornwalls in my living room and the bass always sounded boomy or muddied as you call it. The room is approximately 15 x 30. Speakers about 15 feet apart in each corner facing forward at a slight angle.
  17. Thanks guys. We will switch out the Heresys and see what the old sock trick does. We will report back.
  18. Interesting, so what type of socks should we use? Types of socks available to us are as follows: dirty, not so-clean, tube, dress, ankle, athletic, thermal... you get the drift. Seriously, if we stick the socks in the mid range we will hear the problem? We wiil give it a whirl!
  19. Hello all, I have a friend that bought some 1977 Cornwalls that are not sounding clear when we get them hooked up. These speakers were bought last week and have not been used regularly for some time. The speakers seem to me to sound muddled. We have a pair of Heresy's in the room that sound much more crisp or clear. I guess the point of this post is to seek some help for my frfiend on what needs to be done to hopefully get these Cornwalls to rock again. Anyone got an opinion on where to start for the fix?
  20. Lets hope there is no future trouble. I must admit that it was a bit disconcerting listening to the loose parts rattle around in the BBX while I was putting the cover on. Oh well, it's done now.I don't plan on moving it for a while.
  21. Mark did not seem too concerned about it when he instructed me to cut the screws. The preamp is in the wood case and reconnected to the system. I played several hours of music wth it last night. Now you guys got me worried about turning on my preamp. I really don't have the tools or the patience to completely disassemble the preamp. I guess I will roll the dice every time I turn it on.
  22. Why do you say that? It isn't possible to see the nut on two of the foot mountings. I have two of them floating around right now. I figured they could be removed next time the preamp is completely disassembled.
  23. Thanks LarryC. I emailed Mark earlier. Mark emailed me back just a few minutes ago. Unfortunately I will need to cut off the feet or disassemble the entire preamp. I thought I might have been just overlooking some simple solution. I guess them feet are gonna get snipped off there now, because I need my music back!
  24. I have owned a Juicy Music Blueberry preamp for several years, but I have never taken the time to put it in the wood case that was made for it. The wood cabinet made the preamp just a bit too wide to fit in a particular peice of furniture I was using. I am now wanting to use the wood case, and I have figured out that the rubber feet on the preamp need to be removed in order to use the wood case. The rubber feet on the preamp are attached with a small screw and nut which is attached through the bottom of the metal preamp casing. The phillips head screw will turn without loosening unless the nut attached to the screw is held by pliers from the inside of the preamp's casing. This in no problem for two of the rubber feet, but there are two remaining feet that are attached underneath the mountings for the circuitry on the inside of the preamp. I cannot access them to hold the nut in place to unscrew the rubber feet. AAarggh! Am I missing something here? Anyone have experience with this problem before? I don't want to basically disassemble the entire preamp to get to the nut that is in the bottom of the preamp body underneath the circuit board. Any help would be appreciated. I will take a few pictures if anyone is interested in helping and needs to see the preamp casing. -Joe
  25. Hello all- I am planning on connecting my computer to my 2 channel system to access all the digital audio files that I have collected over the years. Mostly live shows of various artists that allow taping of their shows. In the past I have burned thousands of cdrs to listen to these recordings. Burning all the music to cdr only to determine that some cdrs would probably never be played again because of low sound quality or glitches is wasteful. I would like change this process, so that I can choose to burn a cd after I have heard it on my 2 channel system. After reading some older threads on the topic of computer to stereo transfer I am wondering if I am making the right decision to try the Fubar II DAC. Anyone out there have any comparable recommendations? I do not want to spend a lot of money, and I don't want to get into anything real technical. The Fubar seems to be a good place to start. I would be very interested in any comments from people that have used a Fubar DAC in their system, or any similar equipment that is in the $100 to $300 price range. Here is what i am currently running as my 2 channel set up: Custom Will Vincent SET monoblocs McIntosh C-22 preamp Sheng Ya CD-S10 Rega P1 turntable 1988 KBMEL Klipschorns Thanks.
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