Das Prospektblatt des SX-40
FOR A PRICELESS ADVENTURE IN FM STEREO!
AM/FM MULTIPLEX STEREO RECEIVER MODEL SX-40
The SX-40 is a compact stereophonic amplifier complete in every respect, designed and created by PIONEER, world leader in high fidelity sound reproduction, the fruit of its extensive technological research and experience.
All functions are put together into a compact package tucked behind the handsome front panel featuring a large easy-to-read tuning dial and orderly positioned controls, to provide full play of the outstanding performance of the various sections.
With its music power output of "20 full watts" per channel, the SX-40 is guaranteed to provide full satisfaction to the most critical ears.
NOTE SOME OF ITS OUTSTANDING FEATURES :
The output circuit is comprised of two pairs of the popular 6BQ5/EL84 type tubes operating in efficient pushpull circuits.
Each channel provides a music power output of 20 watts, for a total of 40 watts of power. The tuner is comprised of an AM broadcast band tuner, an FM band tuner, and a multiplex circuit for reception of FM stereo broadcasts. The use of the latest circuitry ensures outstanding channel separation in stereo reception.
An effective tuning indicator is provided, for easy pinpoint tuning of broadcasts.
Handling is simplicity itself. Moreover, to ensure optimum reproduction under all conditions, independent volume and channel balance controls are provided. The loudness contour circuit is provided with an ON-OFF switch, so that true high fidelity reproduction is possible regardless of the volume setting. The preamplifier-power amplifier circuitry is designed for maximum versatility. It can handle all types of phonograph pickups, while auxiliary inputs are provided also to make the SX-40 a truly universal unit. High and low cut filters are provided, for effective elimination of undesirable noises.
The external finish features a rugged aluminum sash panel with an extra-large tuning dial for ease in handling. Tuning ranges of the tuner circuits are :
AM (broadcast band)—535~1,605 kilocycles
FM—88—108 megacycles
SPECIFICATIONS
| FM SECTION | |
| Circuitry : | Ratio Detector with AFC |
| Frequency Range : | 88-—'1 08 mc |
| Usable Sensitivity (IHFM) : | 3 [JLV |
| Selectivity : | ±1,000 kc ( —3db) |
| Discriminator Bandwidth (peak to peak) : | |
| 600 kc | |
| Signal to Noise Ratio : | 50 db |
| Antenna Input : | 300 ohms (unbalanced) |
| MULTIPLEX SECTION | |
| Circuitry : | Switching type ; equipped with stereo |
| indicator light | |
| Channel Separation : | Better than 35 db at 1 kc |
| AM SECTION | |
| Frequency Range : | 535~1,605 kc |
| Usable Sensitivity (IHFM) : | 50 j«v |
| Selectivity : | Sharp ±3kc |
| Broad ±9kc | |
| Antenna Input : | Built in ferrite loopstick with terminal |
| for external antenna | |
| AUDIO SECTION | |
| Music Power Output : | 20 watts per channel |
| RMS Rated Power Output: | 15 watts per channel |
| Frequency Response : | ±1 db from 1 5 cps to 100,000 cps |
| Harmonic Distortion (at rated output) : | |
| Less than 1% | |
| Damping Factor : | 7.0 |
| Hum and Noise (at rated output) : | |
| Magnetic Better than 60 db | |
| Auxiliary Better than 70 db | |
| Input and Audio Sensitivity : | Magnetic 3 mv |
| Crystal or Ceramic 47 mv | |
| Auxiliary 300 mv | |
| Tape Playback 300 mv | |
| Bass Control : | Boost 14 db. Cut 13 db at 50 cps |
| Treble Control : | Boost 11 db, Cut 13db at 10,000 cps |
| Filters : | High Cut Filters — 15db at 10,000 cps |
| Low Cut Filters — lOdb at 50 cps | |
| Equalization : | Phono RIAA |
| Power Supply : | Silicon diodes |
| Power Requirements : | 115/230 volts. 1.5/075 amp. 145 watts |
| (max) 50—60 cps | |
| Tubes (19) : | 6BE6X1, 6BA6X3, 6AQ8/ECC85X3 |
| 6CG7X1, 12AX7/ECC83X5, 6BQ5/ | |
| EL-84X4, 6AV6X1, EM-84X1 | |
| Diodes (8) : | Germanium-OA-70/IN60X2, OA-81/ |
| IN34X4, | |
| Silicon-SE-05bX2 | |
| Dimensions : | 1 829/32r/(W) X 61/32,,(H) X 1 33/32"(D) |
| Weight : | 35 lbs. 3oz. |
