Vintage PAIR Dynakit Mark Mk IV Mono Tube Amps Amplifiers UNTESTED Minus 2 Tubes

Vintage PAIR Dynakit Mark Mk IV Mono Tube Amps Amplifiers UNTESTED Minus 2 Tubes

Vintage PAIR Dynakit Mark Mk IV Mono Tube Amps Amplifiers UNTESTED Minus 2 Tubes

Vintage PAIR Dynakit Mark Mk IV Mono Tube Amps Amplifiers UNTESTED Minus 2 Tubes

Vintage PAIR Dynakit Mark Mk IV Mono Tube Amps Amplifiers UNTESTED Minus 2 Tubes

Vintage PAIR Dynakit Mark Mk IV Mono Tube Amps Amplifiers UNTESTED Minus 2 Tubes

Vintage PAIR Dynakit Mark Mk IV Mono Tube Amps Amplifiers UNTESTED Minus 2 Tubes

Vintage PAIR Dynakit Mark Mk IV Mono Tube Amps Amplifiers UNTESTED Minus 2 Tubes

Vintage PAIR Dynakit Mark Mk IV Mono Tube Amps Amplifiers UNTESTED Minus 2 Tubes

Vintage PAIR Dynakit Mark Mk IV Mono Tube Amps Amplifiers UNTESTED Minus 2 Tubes

Vintage PAIR Dynakit Mark Mk IV Mono Tube Amps Amplifiers UNTESTED Minus 2 Tubes

Vintage PAIR Dynakit Mark Mk IV Mono Tube Amps Amplifiers UNTESTED Minus 2 Tubes

Vintage PAIR Dynakit Mark Mk IV Mono Tube Amps Amplifiers UNTESTED Minus 2 Tubes Looks complete except for 2. Tubes on one of the amps. Info found on the web. The Mark IV Amplifier uses a circuit arrangement based on that of the Dynakit’s Mark II and Mark III which have become world famous for superior quality while essentially simple and trouble free. The new 7199 tube is used as a pentode high gain voltage amplifier directly coupled to a cathodyne phase inverter. All parameters are adjusted for minimum distortion. This type of phase inverter has the unique advantage that its operation is independent of tube ageing so that no adjustments are required in maintaining optimum performance. An internal capacitive feedback loop balances the phase inverter at the highest frequencies, and the arrangement provides accurately balanced driving signals to the output tubes, which are EL-34′s operated well below their maximum ratings. The output tubes use a fixed bias arrangement which is set through use of Dyna Biaset (patent pending) which provides optimum linearity of the tubes and minimizes the effects of unbalanced components. The connection of the output tubes includes a small percentage of screen loading which improves the regulation of the output stage and makes it comparatively uncritical of load impedance. Power output: 40 watts into 8 (mono) (EACH). Frequency response: 20Hz to 20kHz. Total harmonic distortion: 1%. Input sensitivity: 1.3V. Signal to noise ratio: 90dB. Speaker load impedance: 4 to 16. Valve complement: 2 x EL-34, 1 x 7199, 1 x GZ-34, 1 x selenium rectifier. Dimensions: 5 x 14 x 6.5 inches. I do not have the proper equipment to test a tube pre-amp and do not want to risk applying power to a 60 year old unit. Previous units that I acquired from the same audiophile collection have proven to be in very good condition. He did not own junk. See pics for details. Will be carefully packed in a sturdy box with ample packaging. On all 6 sides. The Last picture is an example of how I pack these (with Styrofoam on the top and bottom as well as the sides shown). It is located in Simi Valley, CA. Just 40 miles north of Los Angeles. The item “Vintage PAIR Dynakit Mark Mk IV Mono Tube Amps Amplifiers UNTESTED Minus 2 Tubes” is in sale since Friday, December 18, 2020. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Preamps & Tube Preamps”. The seller is “normajewels” and is located in Simi Valley, California. This item can be shipped to United States.
  • MPN: Mark IV
  • Brand: Dynaco

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