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OPERATING MANUAL

EMTRON DX-1d

HF LINEAR AMPLIFIER

April 2003

Emtron

DIVISION OF EMONA ELECTRONICS PTY. LTD.

92-94 Wentworth Avenue, Sydney 2010, Australia

Tel. +612 92110988 Fax +612 92811508

www.emtron.com.au

Summary of Contents for DX-1d

Page 1: ...PERATING MANUAL EMTRON DX 1d HF LINEAR AMPLIFIER April 2003 Emtron DIVISION OF EMONA ELECTRONICS PTY LTD 92 94 Wentworth Avenue Sydney 2010 Australia Tel 612 92110988 Fax 612 92811508 www emtron com a...

Page 2: ...PACITORS TEST FREQUENCY BAND FACTORY SETTINGS 50 OHM LOAD USER SETTING ANTENNA PLATE LOAD PLATE LOAD 28 600 MHz 10m 24 900 MHz 12m 21 200 MHz 15m 18 100 MHz 17m 14 200 MHz 20m 7 070 MHz 40m 3 600 MHz...

Page 3: ...7 4 OPERATION AT 230V 220V 200V 100V AND 120V EXPORT VERSION 12 8 DX 1D DESCRIPTION 14 8 1 RF SECTION 14 8 2 MAINS TRANSFORMER 14 8 3 H V POWER SUPPLY 14 8 4 SOFT START MODULE 14 8 5 SENSOR MODULE 14...

Page 4: ...PONENT LEGEND SILKSCREEN TOP 32 CONTROL BOARD SOLDER SIDE TRACK WORK 33 16 APPENDIX 2 WAVEFORMS 34 16 1 QSK OPTIONAL MODULE SWITCHING 34 16 2 LINEARITY 34 17 APPENDIX 3 ADJUSTMENTS 35 17 1 CONTROL BOA...

Page 5: ...en grid current positive and negative while 5 single LED s indicate Ready Overdrive warning High SWR cut off indication On Air and Fault An analogue panel meter shows the plate current and the second...

Page 6: ...ure below BAND SELECTOR PLATE TUNING LOAD TUNING POWER ON OFF STANDBY OPERATE SWITCH DISPLAY TANK COIL 40 160 m TANK COIL 10 30 m BAND SWITCH Temperature Sensor RF CHOKE RF SENSOR ANT RELAY BLOWER SOF...

Page 7: ...comprehensive fault protection systems include circuitry to monitor plate current should the plate current exceed a safe value the amplifier goes to standby mode for 2 minutes screen grid over current...

Page 8: ...NPACKING The DX 1d is packed in a heavy duty package easily sufficient to protect the amplifier during transportation even in case of fairly rough handling The weight of the commercially rated mains t...

Page 9: ...REAR PANEL The following connectors and controls are present on the rear panel 5 1 Power Earth connections A wing nut Earth connection is provided at the rear of DX 1d A good Earth link must be provid...

Page 10: ...A chart of approximate starting settings is given in Table 1 LOAD TUNE Tunes the amplifier output loading A chart of approximate starting settings is given in Table 1 ON OFF Switches the AC power on a...

Page 11: ...ns off at DX 1d power up if the OPR STBY switch on the front panel is left in OPR position The FAULT light will go off when the DX 1d is ready for operation after warm up SWR single LED red A three se...

Page 12: ...the power cable into the power point 7 3 The power cable export version As different countries have different standards for their power connections the DX 1d amplifiers exported from Australia are su...

Page 13: ...0 120 0 110 100 120 0 100 120 0 110 100 120 0 100 120 0 110 100 120 LINK LINK 0 240 LINK 230 220 0 0 240V 230V 220V 0 100 120 0 110 100 120 0 100 120 0 110 100 120 LINK 0 0 200V 120V 200 120 FAN FAN F...

Page 14: ...0A tube 8 2 Mains transformer The transformer is the heart of the amplifier a high performance type designed to reduce the size and weight It is built with a generous reserve of power handling easily...

Page 15: ...e beginning of the word when EBS is activated Screen voltage regulator with adjustable voltage and adjustable current limiting for tube protection Overdrive protection and timer based on detecting gri...

Page 16: ...tions given in Table 1 DX 1d must be powered ON and Ready with the OPR STBY switch in OPR position Start with the transmitter at minimum power in a carrier mode e g RTTY of CW key down Key the transce...

Page 17: ...PLATE and LOAD can be used for final tuning with no need to repeat the preliminary tuning every time Tuning for full power Start with low drive level and the PLATE and LOAD knobs in the known initial...

Page 18: ...e the SWR protection level in DX 1d is adjustable but it is far preferable for you to fix your antenna 10 2 ALC ADJUSTMENT The DX 1d can be operated without any ALC connection However if you wish to u...

Page 19: ...e current drastically minimising the tube dissipation Be aware that at a low power level slightly different tuning is required than is for full power Achieving the best linearity The amplifier must be...

Page 20: ...e and try again If the fuse blows again or if the fuses were not blown in the first place contact your supplier 12 2 Fan not working As soon as you switch the power on you should notice two things abo...

Page 21: ...a major fault Put the amplifier on STBY and the flashing will stop Then switch the power off and contact your supplier 12 7 Sparks Discharges in RF area Very high RF voltages are present in the ampli...

Page 22: ...ch FM Frequency Modulation HF High Frequency LED Light Emitting Diode PEP Peak Envelope Power RF Radio Frequency RTTY Radio Tele Type SSB Single Side Band SSTV Slow Scan Tele Vision SWR Standing Wave...

Page 23: ...e Schematic CONTROL BOARD MODULE See Schematic RF SENSOR 5V FAULT ON AIR O DRIVE Vp Ip Ip Protec READY SW Ig2 Pf Pr SWR Protect RF OUT ANTENNA ANTENNA RELAY QSK Relay 1 2 RF IN TRANSCEIVER TEMPERATURE...

Page 24: ...0pF 6A100 470uF 450V 75k 25R IP 1000pF 6A100 1000pF 6A100 1000pF 1000pF 6A100 330k 330k 330k 6A100 1000pF 6A100 75k 470uF 450V 6A100 6A100 6A100 75k 6A100 470uF 450V 6A100 470uF 450V 6A100 75k 75k 6A1...

Page 25: ...GRN W R GRY PNK BLK W BLK X RED X GRY BLU ORN BLK BLUE X T110 T110 GND GND 300VAC 300VAC 100VAC 100VAC 10VAC1 10VAC1 10VAC2 10VAC2 ALC1 SWR2 SWR1 SWR4 SWR3 ALC2 VIOLET WHITE RED GRN BROWN GRN BRN GRN...

Page 26: ...tStartWiring 1 SOFT START WIRING Standard version 1 1 Monday January 07 2002 Title Size Document Number Rev Date Sheet of 25A Yellow Green NEUTRAL 1 Brown Blue 4 7nF 250V Y2 Cover Interlock MT1 Brown...

Page 27: ...INTERLOCK Brown MT2 Blue MT1 200V Yellow Yellow Green 4 7nF 250Vac Y2 NEUTRAL 1 To LOOM 12V Blue Sof tStartWiring US 1 SOFT START WIRING U S Version A4 1 1 Monday January 07 2002 Title Size Document N...

Page 28: ...C SR PC D SS TPA SC AP SSC LS C5 220uF 25V SWITCH MT2 R8 470k 2W C3 2 2nF NOTE 200V to 240V operation R10 100k D2 1N4007 C4 220uF 25V For 110VAC replace C1 by 3 9k or 4 3k 6W resistor R7 470k 2W R9 1...

Page 29: ...4 RF DECK IN D4 1N4148 50 Rin D2 1N4004 AMP RF OUT TO RF SENSOR D3 1N4148 QSK2DX2 2 QSKv2 DX 2 A4 1 1 Monday January 07 2002 Title Size Document Number Rev Date Sheet of E M T R O N JP1 1 2 R2 1k RF I...

Page 30: ...lified Diagram R9 100 9 Way 1 2 3 4 5 6 7 8 9 Brown C5 2 2nF V1 GU84B DX 2A EBS PLATE VOLTAGE D3 A106 COAX COAX T1 BALUN R7 37 5 100W Ip C8 1500p SM C9 2 2nF R F D X1 4 RF MODULE Sub Chassis DX 1b DX...

Page 31: ...9 100R R20 5M6 C6 100nF D4 12V U11 PC521 POT3 50K 4 7nF C45 R23 100R C8 10uF 16V 22k R24 22k R25 R66 100K X6 LP2 C15 100uF 50V C16 100nF BR4 WO6 X2 1nF 1KV C18 R50 5K 1K 100R 1 2 3 SW1 X2 U9 PC521 D22...

Page 32: ...2 R19 R20 R23 R24 R25 Q8 D28 D27 1 C23 U10 U9 U8 U6 BR3 1 C54 X3 R69 Q1 C15 R36 U4 D7 C9 R41 D25 C12 POT7 C20 1 C16 U1 C7 X2 X5 D1 RL1 Q7 D4 C36 R32 Q5 Q14 POT3 R50 Q9 D9 U11 Q25 R13 R12 D26 POT1 C1 1...

Page 33: ...33 Control Board Solder Side Track work COPPER LAYER SOLDER SIDE AMPC V 3E...

Page 34: ...tching The output relay Top trace switches first then the RF drive is applied Bottom trace 16 2Linearity V V a 1674mV b 1958mV 21Apr2003 18 36 Fig 5 Sample of linearity curve obtained on a DX 1d at 75...

Page 35: ...desired pre bias current Recommended pre bias currents POT 7 PRE_BIAS DX1b 10 to 30 mA 10 to 30 mV on the voltmeter Clockwise to reduce current DX2 and DX2SP 15 to 40 mA 15 to 40 mV on the voltmeter...

Page 36: ...ADJUSTMENT Adjustment POT4 marked EBS Usually this adjustment is performed on 20m 14 200 MHz but it can be done on any band Transmit into a dummy load or antenna Apply very low input drive With the EB...

Page 37: ...and the screen voltage can be measured This way the current limit of the screen regulator and the ig2 indicator on the front panel can be checked quickly without the need for a special load However th...

Page 38: ...Ip0 BIAS PRE BIAS SWR SCREEN VOLTAGE EBS SENSITIVITY EBS OFF EBS ON SCREEN CURRENT LIMIT PLATE CURRENT PROTECTION SWR1 SWR4 SWR SCREEN VOLTAGE SCREEN CURRENT LIMIT Ip PROTECTION EBS SENSITIVITY EBS OF...

Page 39: ...verse the input and output RF connections connect the transceiver or exciter to the output connect the dummy load to the input of the amplifier Apply 100W drive and adjust RF R for 100W indication Rev...

Page 40: ...res 100mV or less Adjust the trimmer on the output side left hand side in the RF sensor for minimum reading on the yellow red wires Use an RF screwdriver Reverse the 2 RF cables apply power to the out...

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