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The Suitability of the 6DJ8 for Audio
http://www.tubeaudiostore.com/suitof6dfora.html
Remember that the cascode circuit for which the 6DJ8 was designed works with microvolt inputs. We employ volt inputs in line stages and drivers and so use higher supply voltage and with lower current. The 6DJ8 has plenty of transconductance at 5mA and below, thus making it ideal for this new application. Detective Work
The 6DJ8 Headphone Amp | Cascade Tubes
https://www.cascadetubes.com/the-6dj8-headphone-amp/
This design uses one 6DJ8 dual triode for each channel. The triode is wired in a push-pull configuration with a small line matching transformer. In the common (between the triodes) cathode circuit is a solid state three terminal voltage regulator wired as a constant current source. And that’s all there is to it.
6DJ8 / ECC88 / Symmetrical SRPP Tube Preamplifier Schematic
https://diyaudioprojects.com/Schematics/6DJ8-SRPP-Tube-Preamplifier.htm
This is one of many possible variations for a Symmetrical SRPP Preamplifier based around the 6DJ8 / ECC88 family of tubes. The SRPP circuit has also been referred to as a SEPP, Totem Pole, Mu Follower, Mu amplifier and Cascoded Cathode Follower. The original name for this circuit is a Balanced Direct and Alternating Current Amplifier (Maurice Artzt, Radio …
DIY 6DJ8 (ECC88) Tube Hi-Fi Headphone Amplifier Project
https://diyaudioprojects.com/Tubes/6DJ8-Tube-Headphone-Amp/
Performance - 6DJ8 (ECC88) Tube Headamp. The amplifier will deliver over 100 mW of output into pretty much anything from about 32 ohms to 300 ohms. With the Edcor XSM10K/150 audio output transformers the optimum match is at 75 and 150 ohms.
Best 6DJ8 Review - Tubes for Amps
https://www.tubesforamps.com/best-6dj8-review
6DJ8 tube was designed as a broad band RF amplifier tube for communication equipments and TV sets. 6DJ8 has high conductance which also makes it an excellent tube in audio amplifier. Due to high conductance requirements, 6DJ8/6922 type tubes require special construction (called 'frame grid'). Related link: Shop 6DJ8 / ECC88 / 6922 Tubes
6DJ8 / 6922 Vacuum Tube List
http://www.vacuumtubes.com/6dj8.html
6DJ8 / ECC88: Raytheon USA: $24 ea new: 6DJ8/ ECC88: Japan-Made mostly by either Toshiba or Matsushita. These are pretty nice for the price, but again they are probably best utilized in circuits where microphonics are not critical: $18 ea new. $10 ea used. 6DJ8/ ECC88: Amperex Holland Orange World Logo (later production) many are of the "A" frame type construction.
6DJ8/ECC83 Preamplifier D.I.Y - Single Ended
http://www.single-ended.com/Lagarto/minipreamp.htm
6DJ8(ECC88) mini pre amplifier Audio Technica AT-33 E with SL-1200M2 circuit diagram here mini pre amplifier with RIAA. and "roll off" frequency with R1,R2,C1 and C2. R1=9XR2 , turn over is 3180us roll off is 75us so T= CR easy to calculate. and easy to caluculate with f= 1/2x3.14xCR.too. ECC83 mini pre amplifier
6922 vs. 6DJ8 vs,7308 - High-End Audio Discussion Forum
https://forum.audiogon.com/discussions/6922-vs-6dj8-vs-7308
A circuit that can use a 6dj8 can use a 7308. They are electrically different. 4yanx 1,576 posts 03-18-2003 11:08am I would caution against the over reliance on any "pecking-order" with respect to "good-better-best" with these tubes.
6N1, 6N2, 6N11 (6DJ8) in pre? | Page 2 | diyAudio
https://www.diyaudio.com/community/threads/6n1-6n2-6n11-6dj8-in-pre.380485/page-2
The characteristics that vary between 6DJ8 and 6922 are: 6DJ8 section with pins 1,2,3 has max cathode-heater voltage of 130V; 6DJ8 section with pins 6,7,9 has max cathode-heater voltage of 50V; 6922 has max heater-cathode voltage voltage of 100V for both sections; 6DJ8 has max plate voltage of 130V (although that might be a conservative spec)
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