doubty asked: Hi i need to make a high power narrow band VHF amplifier using a pentode. I would like to use coaxial cavities for input/output coupling. Anyone knows how to design such amplifiers? Please provide any equations, online design resources or relevant forums that would help me out.mesothelioma lawyer

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Fisher asked: I have a JBL JRX 115. the woofer is 8 ohms, and the HF driver is 4 ohms. the crossover is made so that it all is 8 ohms nominal. What happens to the cross over if I replaced the HF driver as 8 ohms? the cross over is 1.6khz @ 4 ohms […]

Alec Kies asked: Okay…
I have a Heathkit 10-12 Oscilloscope, which is one of three ’scopes I picked up in some curb-diving.
I know jack about Oscilloscopes, and its something I will have to learn, but in the mean time: I need some help.
I need to get some input into these things.. My goal is […]

Blue Rizla Girl asked: I read something somewhere once about using small mains transformers as substitute speaker transformers in valve circuits.
Suppose I have a 6-0-6V transformer with a 240V primary. That gives a 20:1 turns ratio. So if the secondary is putting out Vs volts at Is amps into 8 ohms, then […]

magnumwrestler asked: There are many types of preamp tubes, and if i wanted to try a whole load of them out just by switching them in and out of the same nine-pin socket, would i have to change any of the wiring? or do all nine-pin tubes use the same pin layout?Consolidate school loans

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magnumwrestler asked: Im building my own tube amp, and i want to incorporate distortion, both preamp and output, how do i do this?Check Experian score free

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Luckylouman asked: Does anyone know what the heathkit electronic courses are like? I am interested in the courses just wanted to know if they what they claim to be.
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toolongdays asked: I am a musician but I also dabble in art and I would like to do something creative with vacuum tubes. I want to take 200 or so Ecc83s and build something with them. I have a little electronics know-how but i dont want to get involved to the point where i […]

frickadella asked: I’m not an engineer, so can someone explain why you would design an amp with multiple tubes… what does this give you in terms of power, volume, or tone control? I’ve read about tubes being paired or matched, and I would guess pairs work in series then.
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dsama86 asked: I built a simple crossover network using just an inductor as a lowpass filter an just a capacitor as a high-pass filter for an electronics class. (Then hooked up to a woofer and a tweeter) I have all the data pertaining to the circuit, including graphs of the transfer function versus frequency, but […]