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The amplifier with elegance. Gracefully refined and dignified.
# Features: A solid state amplifier pre-tuned to sound similar to our ultra high-end Musee acoustic amplifier series.
# Individual input level control with allows each channel to be independently controlled for multi-channel system, or 5.1 channel system.
# Pulse width modulation power supply built with toroidal core transformer for great response to high frequency and current capacity. Power supply keeps steady voltage and provides wider dynamic range.
# Powerful output final stage driven by Pc=100W 1c=10A bipolar power transistor in a single push-pull. This provides a simple and uniformed output sound.
# Blue glass epoxy circuit board for durability, reliability and endurance. 70um thick copper foil is also used for all wiring.
# High density aluminum chassis with real wood ornaments provides the elegant look and the luxury satisfaction as well as the functionality as a heat sink.
# Cooper plate backing.
# Specification: Rated Power: 70W x 4ch (4Ω) (210W x 2ch(4ΩBridged))
# Maximum Output Power: 140W x 4 (4Ω)
# Load Impedance: 2Ω - 8Ω/4Ω - 8Ω(Bridged)
# Input Sensitivity: 0.2-5V (Each channel can be individually controlled)
# Total Harmonic Distortion: 0.01% (1KHz/4Ω)
# Frequency Response: 5Hz - 100kHz (+0,-1.5dB)
# Signal-to-Noise Ratio: 100dB (1KHz/IHF-A)
# Standby Time: Short Circuit/Over Voltage/Over Load/Thermal
# Input Voltage: DC12-16V
# Current Consumption: 1.2A (Idle) /40A (Rated Power)
# Dimensions: 431(W ) x210(D) x 55(H)mm
# Weight: 5.0Kg
This is one of the two CK2III headphone amplifiers I'm building up. One's for me and the other is for Jim. I've been taking my time making sure I do a proper job :-) I just finished the front panels this weekend. They went smoothly after a little planning and with help from some cone cutters and my trusty cordless drill. I sandwiched the pairs of panels together and screwed them down to a piece of plywood so I could clamp it tightly to my workbench. Stuck to the top panel with repositionable glue was a 1:1 CAD drawing that I done, so I could easily punch the centres. And voila, about 10 cups of tea later and they were ready to be screwed in to place.
This is just a dry fit at the mo to see how things fit. Tightly as you can see! The next job is the angle bracket to support the volume knob. The knob will be position with 4mm gap between the top side and bottom, and the face flush with the front. I've already got a piece of steel with a 90 deg bend in it, saved from the scrap at work, just needs cutting to size, some holes drilling in it and then painting up. Black of course to match the rest.
Amplifier from my dad's old hi-fi set-up. It smells like ozone when it's been on for a while. And check out those glowing vacuum tubes!
This is an electronic valve in an amplifier, the old fashioned equivalent to transistors.
This pic to most is probably not that interesting, but ive always thought Valves really cool.
Newly recruited agents Eunice Mwangi, Agnes Nyambura, Teresa Alwala, and Loise Nyaguthi pose as they leave the branch after restocking. Buying in to the system, agents are given their "Business in a Bag" - branded uniforms, tote bags, homesigns, starter products and more.
Kenya
Photo credit: Georgina Goodwin
Photo taken: August 2013
All the parts of the system are now connected. The initial tests were done with the valves removed and a voltmeter used to check that the HT and LT voltages appeared on the right pins. Since they did, the valves could be safely fitted.
The amplifier seems to work, touching the input connection with a screwdriver blade produces noise in the earphone. But the microphone doesn't do anything.
SU-V8 has another feature of Super Bass Turnover to be set at 75Hz and 150Hz. I tried it, and it's a very low bass booster but it's really not necessary unless hooking up with small bookshelf speakers, or maybe listen to recordings that lack basses like cassette tapes and AM radio broadcasting. Otherwise, it's just an individual's demand in outstanding bass.
POV-Ray rendering of the top of a vacuum tube amplifier. Inspired by the article "Einstein's Amplifier" in Make Magazine. I was set on finishing the inside components and then building the amplifier before talking myself out of it.
Assembled Simtelic LM386 power amplifier kit. The story behind this kit is available at jayakody2000lk.blogspot.com/2025/01/decoding-lm386.html
The blue glow is ultraviolet radiation given off by electrons escaping the caged anode and striking the glass.
The nominal power of these two amplifiers is in the single digit Watt range.
Don't be fooled by such a modest rating though; there are few speakers made which could handle these monsters anywhere near full power.
The row of 2AX7 preamp valves (with covers removed) in the back of my old Laney pro-tube guitar amp. From the crackling noises coming out of it when I switched it on for the first time in years, I don't think it's got much life left in it.
The front panel of the HH MA100 amplifier, built in 1974 with a spring-line reverb unit and electroluminescent front panel.
I found this in a cupboard. It is an IEC lead to an amplifier at a Pool. It could have been eaten by rodents!