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  1. myphone

    2359glenn | studio

    These are some of my 5R4G: left Brimar, middle Brimar foreign right Phillips. Different internal structure. Two closer photos are Brimar foreign
  2. myphone

    Feliks-Audio EUFORIA - A Wolf in "Sheep's" Clothing...

    https://www.6moons.com/audioreviews2/feliks/1.html. "Measured with a max 1.8Vrms input where THD falls below 0.5%, Euforia will deliver 0.13 watts into 32Ω and 300Ω, 0.2W into 100Ω and 0.08W into 600Ω. Voltage gain is 20dB and output impedance 20Ω. S/NR is about 97dB. Examples of headphones...
  3. myphone

    Feliks-Audio EUFORIA - A Wolf in "Sheep's" Clothing...

    "What are your impressions of this mod?" openness: sound stage is much larger, deeper, and clearer. Instruments (Classical music) are larger and have more air. 'Can you already say something or does it still need time?' Yes, The improvement is very dramatic right after cap replacement. Teflon...
  4. myphone

    Feliks-Audio EUFORIA - A Wolf in "Sheep's" Clothing...

    http://www.v-cap.com/ Wisconsin, USA 0.33uF TFTF.
  5. myphone

    Feliks-Audio EUFORIA - A Wolf in "Sheep's" Clothing...

    Vcap is much larger than the original Mcap.
  6. myphone

    Feliks-Audio EUFORIA - A Wolf in "Sheep's" Clothing...

    Have mod bugs recently. Replaced the 0.33 uF Mundorf Mcap with Vcap TFTF Teflon capacitor (the older and cheaper Tin version) today. The improvement is so dramatic, even without any capacitor burn-in, that it is not funny. Everything opens up significantly, sound stage, resolution, airiness...
  7. myphone

    2359glenn | studio

    Mordy, like others have stated. This is an used tube. I noticed marks of this size on new 12SX7s as drivers in my Atma-Sphere Amps after 6 months of regular use, 2-3 hours a day. Mark size had not changed much after that. These tubes functioned fine for many years in the amps. When I changed...
  8. myphone

    For 6AS7G tube rollers here .....

    Great idea. Will do some photoshop.
  9. myphone

    For 6AS7G tube rollers here .....

    i have a pair of Haltron branded GEC 6080 tubes, bought from a well known tube seller.
  10. myphone

    Feliks-Audio EUFORIA - A Wolf in "Sheep's" Clothing...

    Thanks CJ and CF, Will keep eyes on these EL38/39. I am rolling in 6SN7/12SN7, and 6080/6AS7/5998/421a. So many choices and combos.
  11. myphone

    Feliks-Audio EUFORIA - A Wolf in "Sheep's" Clothing...

    Also have Mullard and Miniwatt EL11. Have not tried in amp yet.
  12. myphone

    Feliks-Audio EUFORIA - A Wolf in "Sheep's" Clothing...

    Thank you, CF. See the MESH. Mine are different.
  13. myphone

    Feliks-Audio EUFORIA - A Wolf in "Sheep's" Clothing...

    It is interesting to read you guys El tube adventure. I briefly tried EL11/EL12sp. My favorite combo remains RCA 12SX7 (with external 12 volt heater)/WE 421a with HD 800. 12SX7 is incredibly quiet, clear and slightly sweet. GEC 6AS7 works well with HD 800 on small scale music (chamber music)...
  14. myphone

    Feliks-Audio EUFORIA - A Wolf in "Sheep's" Clothing...

    Some of the 421a and 5998 I have: from left 421a (1962), clear top 5998 (1958), chrome top 5998 (1957) and chrome top 5998 (1963). 421a and clear top 5998 are button getters (o-getter later 421a, > 1970's); chrome top are top getters. Interestingly, the above 1957 and 1963 5998 have somewhat...
  15. myphone

    Feliks-Audio EUFORIA - A Wolf in "Sheep's" Clothing...

    WE 421As' structure and sound are similar to clear-top 5998, but quite different from regular (chrome top) 5998.
  16. myphone

    MICROZOTL2 Tube Headphone Amp and preamp: a breakthrough device

    I have both MZ2 and Euforia. Even thought both are OTL, Euforia is for high impedance phones (Senn and Beyerdynamics), MZ2 has higher power output at lower impedance. For Senn HD 600/800 and Beyer T1), Euforia has much better control. MZ2 works with lower impedance phones (Senn HD58X and Fortex).
  17. myphone

    Feliks-Audio EUFORIA - A Wolf in "Sheep's" Clothing...

    I like clear top 5998 and 421A more than chrome top 5998.
  18. myphone

    Feliks-Audio EUFORIA - A Wolf in "Sheep's" Clothing...

    I have used EL11 with 5998 in Euforia before. EL 11 is on the lean side. EL11/5998 worked quite well with T1 and HD65X. I personally prefer warmer drivers for HD800 or HD600.
  19. myphone

    Feliks-Audio EUFORIA - A Wolf in "Sheep's" Clothing...

    Connieflyer, could you pm me about GEC 6AS7? Thanks.
  20. myphone

    For 6AS7G tube rollers here .....

    Thanks guys for alerting the GSP issues. I received GEC 6AS7 last week (in USA) via GSP from England. Guess custom service screening is not water tight.
  21. myphone

    For 6AS7G tube rollers here .....

    Thanks, bought the last pair today.
  22. myphone

    2359glenn | studio

    attmci, concur. I like 421a better. Did some comparison today 1964 d-getter 421a is structurally different from clear top 5998 (1958 and 1959, d-getter).
  23. myphone

    2359glenn | studio

    Mordy, my impression is based on listening on a different amp. Both sylvania 12SN7GT and 6SN7w (short bottle) are great tubes, different sounding. 12SN7GT sounds just like 6SN7GT, refine and sweat; 6SN7w is detail and immediate. Depends on phone pairing and music, one may prefer one tube over...
  24. myphone

    2359glenn | studio

    So far I have been lucky with 5998/421A/6089/6AS7 tubes, I treat them with heater current on only for 3 days before turn on high voltage. A process I learn from owning Atma-sphere OTL power amplifier.
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