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Summary of Contents for Hallicrafters Super Skyrider 1941
- Page 1 OPERATING ALIGNMENT SERVICING INSTRUCTIONS 1941 MODEL SX-28 F.C.C. Itra inc. CHICAGO U.S.A. 080628FCC40...
- Page 2 THE 1941 MODEL SX-28 F.C.C. SUPER SKYRIDER RECEIVER INSTRUCTIONSFOR INSTALLATION, OPERATION AND SERVICE INSTALLATION Should you wish to have a separateantennafor some It is recommendedthat, upon receipt, the carton and onc short vvave frequency or band, a half-wave antenna then the receiverbe carefullv examlncdfor any damagc cut to the properlength for the desired frequency will which might have occurredin transit.
- Page 3 onlyif thebandspread condenser issetat minimumcapac- When using the Model VP-2 Vibrapack, insert the ity which is indicated by a setting of 100on the band- cable and plug attached to this unit in the rear of the spreadlogging scale.It should berecognized that if the SX-28 F.C.C.
- Page 4 results from the receiver once you have become used to At this point, it is suggested that the CRYSTAL their effectson the reception of various types of signals. SHARP setting be used only in cases of extreme inter- The SELECTIVITY control acts as a shutter or gate ference—the receiver must then be tuned exactly to the and varies the width of the path on which signals reach...
- Page 5 Illent of the BFO control which appears directly under Dircctly under the BFO control will be seen thc BASS the TONE CONTROL the following procedure is sug- IN-OUT Switch. With this switch in the BASS IN posi- tion you will have normal audio fidelity. Placing the gested.
- Page 6 CSK' CRYSTAL FILTER CIRCUIT SELECTIVttr SWITCH POSITIONS In positions 1, 2, 3 thc crystal is short circuited. In position 4 the short BROAD MED\UU BROLO acrossthe crystal is openedand the iron core in thc secondaryof the SHAQ p transformer is adjusted for Broad Crystal Action and at this point is BR0A0 accurately tuned to the crystal frequency.
- Page 7 NOISE LIMITER The principle of operation of the limiter is very similar to that of the Lamb limiter which has been described in detail in past issuesof .S.T. The carrier of the received signal is first converte over to the intermediate fre- quency and then fed into the 6L7 IF Amplifier and 6B8 A VC and noise amplifier.
- Page 8 If the noise limiter adjustment permits too great a noise voltage is applied, then the momentary decreasein sensitivity will not be great enough to stop the noise value of transient voltage to be applied to the 6L7 injec- from getting through and some of it will appear in the tor grid, detection will take place and rectified compo- plate circuit of the 6L7 tube and consequently in the OUt- nents of this modulated carrier will...
- Page 9 POWER SUPPLY ACTION The power supply in the Model SX-28is quite normal A double AVC systemis used.The RF and mixer tubes except that it supplies voltage for the 6V6GT output areoperatedby the broadly tunedcarrtercoming through tube directly from the rectifier or before the filter system. only three tuned IF circuits.
- Page 10 FOB the factory. Should this receiver require any adjustments, your All Hallicrafters receivers are built under patents of dealer or distributor has complete technical service in- Radio Corporation of America and Hazeltine Corporation.
- Page 11 —6SK7 —6SK7 5Z3- —61.7 6SC7 6J5ÄSB8 6V6GT — 6SK7 ( ,H ASSIS VIEW *e.t.a •.•SSS GZ.v..:m• STAND-BY •ses SOCKET e%iiilft SPEAKER TERMINALS OPERATION ANTENNA- pHONO METER SOCKET JACK GROUND CONTROL TERMINALS BACK VIEW...
- Page 12 AUDIO FIDELITY CURVE BASS MODEL SX-28 F.C.C. I.F. BROAD-TONE CONTROL —40 I.F. SHARP-TONE CONTROL I.F. SHARP-TONE CONTROL 1000 10,000 CYCLES SECOND AUDIO FILTER CURVE + 15 FREQUENCY RESPONSE WITH BASS SWITCH OUT-- SHARP BASS —10 MODEL SX-28 F.C.C. 1000 topoo CYCLES SECOND...
- Page 13 —ANTENNA- R. F. — B6 — S14 B5—SII B3-S5 -X B4-S8 R.F.- B6-St3 ..lé B5-s,o -2ND. B3•S4 B4S7 f " "-BAND COILS 'C"-TRIM 8 PAD CONDS. SIC-ADJ. IRON CORE 83 FP3 B4 CG FP4 FP6 CQ CA FP2 Bl FP5 "FP INDICATES FIXED PADS WHICH SHOULD...
- Page 14 PARTS LIST 425 Vibrator 2.5 mhy Choke .02 mf 600V T149B Power Transformer 5 mf 200V Type C29 Buffer Condenser 5 mhv Choke Point filter (in vibrator) sw--l Line Switch T-376 Choke RFC—2 .5 mf 200V Plate Switch 12 A Choke 5 mf 200V 30A Type 4AG hallicrofters...
- Page 15 MODEL SX28 F.C.C. SUPER SKYRIDER CONDENSERS Voltage Voltage or Value Value or Purpose Type Purpose Type Band No. 1 Tuning Condenser Electrolytic Main Tuning Condenser .05 mfd Tubular 3 Plate Bandspread Condenser .05 mfd Tubular 4 Plate Bandspread Condenser Electrolytic 5 Plate Bandspread Condenser Electroly cic Variable...
- Page 16 SCHEMATIC DIAGRAM - SUPER SKYRIOER - MODEL sx - 28 61.7 6SA7 6SK7 6SK7 Æuuu 6SA7 6SK7 c 64 r •cauzucy o ssec - BVO bosc ccnto @ POSITtOw CCOSZD • socget •e• •e.•oss CCOSEO CLOSEO nogo...
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