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| Headphone Amps (full-size) Discussion of desktop headphone amps. |
06-18-2009, 07:52 PM
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Headphoneus Supremus:
Reviewerus Prolificus
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Join Date: Apr 2005
Location: Chicagoland
Posts: 11,428
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Just "6SN7" would almost never even be printed on the box - it would say 6SN7GT, or 6SN7GTB, etc. So likely the boxes were for other tubes. But vintage boxes are very cool 
__________________
PLEASE NOTE: Due to the volume of PM's I have been receiving in connection with my reviews, I no longer have the time to answer PM's from people with zero posts. Please read head-fi first before asking questions.
Team GO-U-NORTHWESTERN
Pics: Main Home Rig; Bedside Rig; Office Rig; Portable Rig;
Headphones: JVC HP-DX1000, HA-RX900; Headphile Deep Cup Darth Beyers VXD3,VXD4; Beyerdynamic DT990/600 (Manufaktur) DT770/600 (Manufaktur), DT880/600 Balanced (Manufaktur); HiFi-Man HE-2 Planar Magnetic; Sennheiser PXC-350; Shure SRH840
Home amps: Ray Samuels Audio Stealth (Mullard ECC32/CV4003); Decware Zen CSP-2 (Amperex BB 6DJ8/Sophia Princess 274B); Darkvoice 337 (GEC 6AS7G's/Tung-Sol mesh plate 6SJ7GTs); Wheatfield Audio HA-2 (Mullard ECC32/GEC 6AS7G/GEC U52); Ming-Da MC84-C 07 (Mullard CV4004/EL84/EM87); Audiotailor Jade (GEC 6AS7G/Sylvania 5751); J. Sound Lab Headphone (Mullard 12AT7); Audio-GD Phoenix; Musical Paradise MP-301 (Ken-Rad 6V6GT/Mullard 6AU6)
Portable Amps: Ray Samuels Audio P-51 Mustang; Decware ZenHead; Qables iQube
Sources: Denon DP59L table + Clearaudio Maestro Wood / VPI Scoutmaster + Benz Micro Wood L2 > Audio Electronics PH-1 DJH Phono Preamp; Music Hall 25.2 DAC; Denon DVD-5900;Red Wine Audio iMod iPod (Apple Lossless) & ALO VCap dock; Sony SCD-555ES SACD player
Loudspeaker system: Krell KAV250 Preamp>Sunfire Signature II Power amp > B&W Nautilus 800 Signatures + Velodyne FSR-1500/Martin Logan Descent
Tube testers: B&K Dyna-quick 650 & Dyna-Jet 606
Head-fi feedback
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06-22-2009, 11:39 PM
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Head-Fi'er
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Join Date: Feb 2009
Posts: 42
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back to the GE run this week...
6SN7 GTB 60-09 188-5
6080 62-09 188-21 from a differenct factory.
do those stars mean anything?
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06-23-2009, 12:19 AM
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Headphoneus Supremus:
Reviewerus Prolificus
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Join Date: Apr 2005
Location: Chicagoland
Posts: 11,428
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GE had a "line" of tubes call "5-Star". They were supposed to be premium selected. I have some 5-star 5751's, but have never seen a 5-star 6080. Cool!
__________________
PLEASE NOTE: Due to the volume of PM's I have been receiving in connection with my reviews, I no longer have the time to answer PM's from people with zero posts. Please read head-fi first before asking questions.
Team GO-U-NORTHWESTERN
Pics: Main Home Rig; Bedside Rig; Office Rig; Portable Rig;
Headphones: JVC HP-DX1000, HA-RX900; Headphile Deep Cup Darth Beyers VXD3,VXD4; Beyerdynamic DT990/600 (Manufaktur) DT770/600 (Manufaktur), DT880/600 Balanced (Manufaktur); HiFi-Man HE-2 Planar Magnetic; Sennheiser PXC-350; Shure SRH840
Home amps: Ray Samuels Audio Stealth (Mullard ECC32/CV4003); Decware Zen CSP-2 (Amperex BB 6DJ8/Sophia Princess 274B); Darkvoice 337 (GEC 6AS7G's/Tung-Sol mesh plate 6SJ7GTs); Wheatfield Audio HA-2 (Mullard ECC32/GEC 6AS7G/GEC U52); Ming-Da MC84-C 07 (Mullard CV4004/EL84/EM87); Audiotailor Jade (GEC 6AS7G/Sylvania 5751); J. Sound Lab Headphone (Mullard 12AT7); Audio-GD Phoenix; Musical Paradise MP-301 (Ken-Rad 6V6GT/Mullard 6AU6)
Portable Amps: Ray Samuels Audio P-51 Mustang; Decware ZenHead; Qables iQube
Sources: Denon DP59L table + Clearaudio Maestro Wood / VPI Scoutmaster + Benz Micro Wood L2 > Audio Electronics PH-1 DJH Phono Preamp; Music Hall 25.2 DAC; Denon DVD-5900;Red Wine Audio iMod iPod (Apple Lossless) & ALO VCap dock; Sony SCD-555ES SACD player
Loudspeaker system: Krell KAV250 Preamp>Sunfire Signature II Power amp > B&W Nautilus 800 Signatures + Velodyne FSR-1500/Martin Logan Descent
Tube testers: B&K Dyna-quick 650 & Dyna-Jet 606
Head-fi feedback
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06-23-2009, 12:52 AM
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100+ Head-Fi'er
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Join Date: Jan 2009
Location: Finland
Posts: 125
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Quote:
Originally Posted by shiaokun
188-21
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Schenectady, New York
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06-23-2009, 01:40 AM
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Head-Fi'er
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Join Date: Feb 2009
Posts: 42
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SWEET!  i have a pair.
it certainly sounds "different" from last week's gray-plate RCA 6AS7. slightly more forward would be my 5-hour only impression.
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06-23-2009, 05:53 PM
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500+ Head-Fi'er
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Join Date: Mar 2008
Location: Bay Area, CA
Posts: 964
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5-star 6080's - that's a pair I have not seen before. Nice!
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06-29-2009, 09:40 PM
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Head-Fi'er
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Join Date: Feb 2009
Posts: 42
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this week...
GE 6SN7 GTA 3-52 188-4 what factory is that? Oskari. 
GE JAN-CG-6AS7G 5-39 188-5
first impression? the sound seems lighter and faster than the last week's 6080/6SN7GTB.
speaking of the 6080...took a picture of the pair of the GE 5-star.
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06-30-2009, 12:26 AM
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100+ Head-Fi'er
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Join Date: Jan 2009
Location: Finland
Posts: 125
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Quote:
Originally Posted by shiaokun
188-4 what factory is that?
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Not sure. Probably Owensboro but could be elsewhere in Kentucky.
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06-30-2009, 06:52 PM
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Head-Fi'er
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Join Date: Feb 2009
Posts: 42
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a pair of RCA 6080 tubes just arrive...
79 39
would that be the 39th week of 79? the RCA logo and the box design certainly have that 70's feeling.
Last edited by shiaokun; 07-01-2009 at 09:45 PM.
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07-01-2009, 02:02 PM
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100+ Head-Fi'er
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Join Date: Jan 2009
Location: Finland
Posts: 125
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Quote:
Originally Posted by shiaokun
would be be the 39th week of 79? the RCA logo and the box design certainly have that 70's feeling.
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Agreed. Those markings with the dots are typical to GE.
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07-07-2009, 12:25 AM
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Head-Fi'er
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Join Date: Feb 2009
Posts: 42
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more tubes!
received 2 SYLVANIA 6080WA. the text on the top one is rather worn; the bottom on has 6822. would that be the date code for the 22nd week of 1968? it also has etched text on the glass.
also 2 PHILCO 6SN7 GTB tubes. the seller said the 312 make them SYLVANIA. that true?
put one of each into the DV336i. very slight hum at the beginning. before the end of the first CD it's gone. 
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07-07-2009, 07:59 AM
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100+ Head-Fi'er
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Join Date: Jan 2009
Location: Finland
Posts: 125
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Quote:
Originally Posted by shiaokun
6822. would that be the date code for the 22nd week of 1968?
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It would.
Quote:
Originally Posted by shiaokun
312 make them SYLVANIA. that true?
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Sure is.
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07-28-2009, 11:48 PM
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Head-Fi'er
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Join Date: Feb 2009
Posts: 42
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was enjoying the last combo so much...(Russian 6H13C + Sylvania 6SN7 GTB) but it's tiime to try something different:
Chatham Electronics 6080WA
Du Mont 6SN7 GTB
both came as part of mixed bag tube purchase. would appreciate any info.
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07-29-2009, 02:06 AM
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Headphoneus Supremus:
Reviewerus Prolificus
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Join Date: Apr 2005
Location: Chicagoland
Posts: 11,428
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Those Dumonts are almost certainly Sylvanias. And as you can see, they were made in 1964 
Not sure of the exact vintage on the Chathams, whether that is before or after Chatham was acquired by Tung-Sol.
__________________
PLEASE NOTE: Due to the volume of PM's I have been receiving in connection with my reviews, I no longer have the time to answer PM's from people with zero posts. Please read head-fi first before asking questions.
Team GO-U-NORTHWESTERN
Pics: Main Home Rig; Bedside Rig; Office Rig; Portable Rig;
Headphones: JVC HP-DX1000, HA-RX900; Headphile Deep Cup Darth Beyers VXD3,VXD4; Beyerdynamic DT990/600 (Manufaktur) DT770/600 (Manufaktur), DT880/600 Balanced (Manufaktur); HiFi-Man HE-2 Planar Magnetic; Sennheiser PXC-350; Shure SRH840
Home amps: Ray Samuels Audio Stealth (Mullard ECC32/CV4003); Decware Zen CSP-2 (Amperex BB 6DJ8/Sophia Princess 274B); Darkvoice 337 (GEC 6AS7G's/Tung-Sol mesh plate 6SJ7GTs); Wheatfield Audio HA-2 (Mullard ECC32/GEC 6AS7G/GEC U52); Ming-Da MC84-C 07 (Mullard CV4004/EL84/EM87); Audiotailor Jade (GEC 6AS7G/Sylvania 5751); J. Sound Lab Headphone (Mullard 12AT7); Audio-GD Phoenix; Musical Paradise MP-301 (Ken-Rad 6V6GT/Mullard 6AU6)
Portable Amps: Ray Samuels Audio P-51 Mustang; Decware ZenHead; Qables iQube
Sources: Denon DP59L table + Clearaudio Maestro Wood / VPI Scoutmaster + Benz Micro Wood L2 > Audio Electronics PH-1 DJH Phono Preamp; Music Hall 25.2 DAC; Denon DVD-5900;Red Wine Audio iMod iPod (Apple Lossless) & ALO VCap dock; Sony SCD-555ES SACD player
Loudspeaker system: Krell KAV250 Preamp>Sunfire Signature II Power amp > B&W Nautilus 800 Signatures + Velodyne FSR-1500/Martin Logan Descent
Tube testers: B&K Dyna-quick 650 & Dyna-Jet 606
Head-fi feedback
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08-23-2009, 01:06 AM
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Head-Fi'er
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Join Date: Feb 2009
Posts: 42
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back to 336i...
been listening with Musical Fidelity X-can v3 (with Pink Floyd mod + Pinkie power supply) in the past weeks.
picked these for next week:
RCA JAN CRC-6SN7-GT SPERRY No. 718115 (used previously)
RCA JAN CRC-6080 56-52
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