2024年8月17日 · It has taken years but I have finally stopped trying to build OTL vacuum tube headphone amps. The big output capacitors required are not well suited to the task and modern headphones are particularly sensitive to DC offset. This amp not only sounds better than the recovery amp, it is also a great match for all modern headphones.

2014年9月9日 · Bruce Heran outlines the design and construction of a low power 6DJ8 (ECC88) tube headphone amplifiers. The headamp circuit is Push-Pull and biased into Class-A operation. The headphone amp is suitable for use with many Hi-Fi headphones.

2016年12月15日 · I'm working my way through a build of Bruce Heran's 6DJ8 headphone amp, the schematic is available on diyaudioprojects. I decided to build it because I had most of the parts lying around and the transformers were cheap, so my overall investment is pretty minimal.

2015年10月25日 · hifidiy论坛-这是我正在用着的一个前级，先发个图，这段很忙，待稍后再作些补充吧、、、1、原理图2、频率特性仿真图(可看到低频部分没有衰减反而稍微有提升，这恰好对整 ...

A phono pre-amplifier having a gain of about 40 dB, passive RIAA equalization, two tubes, and simple circuitry. The 6DJ8 (ECC88) dual triode tube was chosen for its relatively low output impedance, reasonably high gain, and ready availability.

The 6DJ8 was designed for use as a low-noise amplifier in VHF and UHF TV tuners, an improved successor to the usual 6BK7, but due to its high gain it was heavily used in high-end test equipment, for example, most high-quality oscilloscopes from the 1950s to the 1960s utilize a number of 6DJ8 tubes.

6DJ8 / ECC88 SRPP Tube Preamplifier Schematic. 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.

2012年11月25日 · The tube headphone amplifier is designed along the lines of the Oddwatt power amplifiers with the exception that this headamp does not require a driver stage. The headphone amplifier uses only one 6DJ8 tube per channel in a push-pull configuration.

Tube Depot carries a selection of 6DJ8 / 6922 / ECC88 / E88CC / CV2492 Pre Amp Vacuum Tubes. New & NOS tubes from Electro-Harmonix & other brands!

2016年4月7日 · For heater, you need 2.5 A for 6AS7 and 0.3A for 6DJ8 so 0-9 V 5A should do the trick. To run this amp cool 7A or higher is better and you need bigger heatsink for 1083 regulator IC. Better separate high voltage and heater tranny.