Dynaco SCA-35 Stereo Control Amplifier/Tuner | | Asking Price: | $300.00 | | Original Price: | $0.00 | | Condition: | Very GoodItem Condition Descriptions- New
Brand new and factory sealed in the box. - Excellent
Perfect in every way. Indistinguishable from a new product but not factory sealed. - Very Good
Used but with no major damage anywhere. Item works as new and has no visible damage. - Good
Used with 1-2 minor scratches anywhere on the item. Item works as new. - Fair
Well used with minor scratches anywhere on the item. May have minor functional issues. - Parts Only
Does not work, use for parts only.
| | Location: | Phoenix, AZ | | Included Items: | |
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| Description: | Accepting offers on both Amplifier ($300) and Tuner ($100)
If you know what this is, you know it's a classic. This is for both the tuner and the amplifier. My friend's father built this when he was in the army. I changed the tubes about 8 years ago and since this has been a back up system so it has no more than a couple hundred hours on it. This is the sweetest sounding amp I've heard. This little amplifier weighs over 15lbs alone! Save money and pick it up. I am willing to ship though.
Call Carlos at 602-538-2929
Description:
The SCA-35 Stereo Control Amplifier is a complete stereo preamplifier and stereo power amplifier, combined on a single chassis with a single power supply. It uses premium grade components conservatively operated. The preamplifier printed circuit module amplifies the selected low level signal for each stereo channel through two stages (the two halves of a 12AX7 tube). Dual tone controls consist of passive networks, each encapsulated in a PEC. Each power amplifier, on a separate printed circuit module, uses a 7199 tube and two 6BQ5 output tubes, along with an optimized (Dynaco Z-565) transformer. A single cathode resistor is used for all four output tubes, which necessitates matching of the tubes.
The power supply uses a transformer and silicon diode full wave rectification, and provides individual hum adjustments for each channel on the back panel, along with two ac convenience outlets. The front panel is champagne gold, anodized aluminum, with die cast knobs, and includes switches for mono-stereo, loudness compensation, filter, and power.
Specifications:
Inputs: Low and high level magnetic phono, ceramic phono, NAB 7-1/2" tape head, radio, tape, spare
Outputs: Tape, 8 and 16 ohm speakers, center channel loudspeaker, headphone provision.
Controls: Selector, Volume, Balance, Blend, Individual Treble and Bass for each channel, Tape Monitor, Loudness, Scratch Filter, Power.
Power:
35 watts continuous;
45 watts IHF music power (both channels).
Frequency Response: ±.5 dB 10 cps to 40 kc. Response not affected by position of volume control.
Power Response: 20 cps to 20 kc without exceeding 1 percent distortion within 1 dB of 17.5 watts, each channel)
Tone Control Range:
±12 dB at 15 kc;
±12 dB at 50 cps.
Sensitivity for rated output:
2.5 mV at tape head;
4 mV at low level magnetic phono;
1 volt at high level.
IM Distortion:less than 1 percent at 17.5 watts (each channel), less than 0.2 percent at average levels.
Hum and Noise:
70 dB below 10 millivolt input for rated output on low level inputs;
80 dB on high level.
Power consumption: 110 watts, 120 volts, 60 cycle AC (120/240 volt, 50/60 cycle operation available with optional PB-028 transformer).
Tube complement: 12AX7/ECC83 (2), 7199 (2), 6BQ5/EL-84/7189 (4)
Silicon diodes: 500 mA, 1000 PIV (2)
Designed by:
Ed Laurent
Year Introduced:
1964
Dyna FM Tuner
Description:
Your FM-3 Dynatuner is one of the most thoroughly researched and field tested components in the high fidelity industry. More than four years of engineering effort have been devoted to this one design with two specific goals in mind: one, performance which cannot be improved at the present state of the art; two, assurance that this performance level can be achieved and maintained by the user in the home.
Side-by-side listening comparisons of the Dynatuner with tuners several times its cost demonstrate the great extent to which these goals have been achieved. Published specifications cannot define the clear superiority of the Dynatuner in low distortion reception of both very weak and exceedingly powerful signals, its remarkable freedom from the problems of cross-modulation and severe multipath effects, its high order of suppression of impulse-type interference, its exceptional capacity to handle severely overmodulated signals without distortion, and its unique ability to maintain full stereo separation with the weakest signals.
These comparisons can be demonstrated using Dynatuners built and aligned by novice constructors, and it is this that represents a fundamental difference from other designs. The Dynatuner is a fresh engineering concept, not an adaptation of an existing production unit. Every portion of the circuit has been carefully investigated in terms both of performance maxima and of the overall stability of operation and simplicity of adjustment required of a kit design. The net result significantly surpasses on all counts units which require that certain sections be pre-built and aligned, and which are therefore incapable of complete home alignment.
The Dynatuner provides the same top performance in your home as in the laboratory, as it can always be properly aligned using the unique procedure detailed in the manual. This ability o be aligned without test equipment, with an alignment as accurate as can be performed in the laboratory, means that after shipping, after aging, after tube replacement, or after any other cause for change in alignment, the unit can be restored to peak performance.
In addition to the adjustment requirements, the basic engineering objective was to produce a tuner design of adequate sensitivity for fringe area reception, with distortion levels of the recovered audio signal comparable to that measured on the best of audio amplifiers. The concentration of effort to reduce distortion has also produced a tuner which is unquestionably one of the very lowest distortion tuners available at any price.
The significant advantages of etched circuit construction in terms of reliability, reproducibility and durability are amply demonstrated in the Dynatuner. Their use has further accomplished the ultimate goal of improved performance. In no other tuner -- kit or factory wired -- has exact component placement and lead layout been so accurately defined. The excellent specifications of the Dynatuner are possible, and guaranteeable, unit to unit, lab model to production kit, because of the extraordinary uniformity which etched circuits provide, and the inherent stability of the circuit configuration.
There has been no intent to enter the sensitivity specification race (claims often engineered by the advertising department). However, using the sensitivity standards proposed by the Institute of High Fidelity Manufacturers this tuner belongs in the highly sensitive class and, in fact, will provide listenable reception of more stations than tuners of ostensibly higher sensitivity rating.
There are many parameters in addition to sensitivity and distortion which are part of a completely satisfactory tuner design. Some are measurable; some are intangible. The design requirements for a premium quality kit lead automatically to a distinctly superior factory assembled tuner as well. Extensive field testing under adverse and marginal conditions has proven the Dynatuner to be as fine a tuner as can be obtained today regardless of price or specification claims.
Specifications:
Outputs: Audio output.
Usable Sensitivity: 4 microvolts for total noise and distortion 30 dB below 100% modulation.
Signal-to-Noise Ratio: 70 dB @ 100% modulation level.
Harmonic Distortion: Less than 0.25% @ 100% modulation.
Drift: Less than 0.03%.
Frequency Response: ±0.5 dB 10 cps to 15 kc.
Capture Ratio: 5 dB.
Selectivity: 54 dB.
Audio Hum: 73 dB below 1 volt output.
AM Suppression: Greater than 63 dB.
Additional Specifications:
IM Distortion: Less than 0.5% from 10 microvolts to 100,000 microvolts @ 100% modulation.
Audio Output: 2 volts @ 100% modulation.
Output Impedance: less than 5000 ohms.
Discriminator Peak to Peak Separation: Greater than 900 kc.
Antenna Input: 300 ohms balanced. 75 ohms unbalanced.
Dial Calibration Accuracy: 0.2%.
Power Consumption: 55 watts.
Tubes: 1 6AQ8 (ECC85); 1 6AT8A; 2 6BA6; 2 6AU6 (EF94); 2 12AX7 (ECC83); 1 EMM-801; 1 6V4 (EZ80); 1 6BL8 (ECF80).
Designed by:
Stewart Hegeman, Ed Laurent (multiplex circuitry by Sid Lidz)
Year Introduced:
1964
Payment Terms: Paypal, Money Order, Check
Shipping Terms: United States
Buyer pays shipping. I'm not sure how to ship tube amps so if it's something you want to do, I can contact the local high end audio shop and ask them about special shipping. Maybe we can do it through them.
The amplifier itself weighs about 15lbs!
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