Hi-Fi amplifiers are also more fussy and have way tighter tolerances and way less distortion. Matched triodes is borrowed from the tube Hi-Fi enthusiasts, who are quantum leaps more fussy than us mere guitar players. Short plates are often less microphonic than long plates. But, you can look at a tube's structure for indications as well. It is the pet work of prime amplifiers in Shuguang.Low microphonics can be good for the first preamp tube (V1), generally the tube closest to the input jack. Because of its perfect accomplish in controlling noise and microphone effect, many famous factories in the world stock it. How recent the description is, how it related to all the various relabelled or private labelled version for sale in the west I also don't know.ħ025 is the prime amplifier of highest quality in Shuguang. It is the pet work of prime amplifiers in Shuguang." Being considered as the best one in the world, EL84 has broad market outlook.ħ025 is the prime amplifier of highest quality in Shuguang. It is mainly used in bookshelf sounder of low power and the outer sounder of computers. Comparing with 6P14P, it has greater compressive strength and output power. EL84 is another type of improved product. So it is a good choice of the type that has no high demand of amplification performance and sensibility. However, its amplifying performance and gain is relatively inferior. The tube core of 12AX7M is shorter than 12AX7B, thus lowering the possibility of its vibration to the music， and the anti-microphone effect is more sufficient. 12AX7M is the product, which Shuguang specially develops for a foreign company herein we will not make out a specific introduction. 12AX7B is the improvement of 12AX7A, and it completely obviates the microphone effect of 12AX7A. Its exports occupy 50% of the global outputs. It has high rate of being qualified, far exceeding the Russian products. It is fit for the first tube, satisfying the highest demand of prime signal amplifying. 12AX7A is a completely qualified product, which has passed the testing of pshaw, noise and microphone.
12AX7 is an ordinary kind of product, being generally used where there is no heavy demand of silencing noise and pshaw.
"In recent years, the prime amplifier of Shuguang has gotten great achievement. Shuguang describes it's 12ax7 range here : The preamp tubes in there now are about five or more years old and I am getting some intermittent hum, which was there before I put in the new EL84s.
The tube store install#
I'd rather do this one time, as I find it difficult to install these tubes behind the power tubes and its screen (there to prevent breakage and such).
Power Tubes in there now are TAD EL84-STR's with about five hours on them. But I don't really know much about the function of the other two preamp tubes. I understand where V1 is and basically what it does. There are only three preamp tubes used in this amp. Please suggest a starting point for retubbing a KOCH Studiotone. What is your opinion of these four tubes in terms of tone and reliability.ģ. Where is the Tube Store 7025 made, what tube, if any, is it modeled after, and how does it sound in general.Ģ. Can someone please help me with these tube question:ġ.
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