OM POWER OM4000HF Скачать руководство пользователя страница 13

Page 

13

 of 

18

 

 

1.  Set the multimeter switch to  the 

HV

  position 

2.

 

Set the OPR/STBY switch to  the 

STBY

 position 

3.

 

Press the  

ON

 button 

 
 
 
The amplifier is prepared for operation with the following automatic steps: 
 

 

The toroidal transformers are switched on step by step. 

 

The cooling blower for the final tube is switched on. 

 

The multi-meter bar graph measures the high voltage; the normal value is 

3.3 kV

  

 

The WAIT LED lights up 

 
 

CAUTION 

After  switching  on,  please  confirm  that  the  blower  is  operating  properly.    Air  must  be 
flowing from the ventilating aperture above the tube.  If there is any concern, or no air 
flow, press the “OFF”-button immediately ! 

 
 
Heating the tube takes  about 

180 seconds

. After this  time the WAIT  LED  goes  out and the 

amplifier is ready for operation. 
 
 
4. Reduce the power output of your transceiver to the 

minimum! 

5. Switch OPR/STBY to 

OPR 

position (OPR LED lights up) 

6. Choose the  

TUNE

 position of multi-meter 

7. Transmit (mode CW) and increase driver power to 

10W

     

 
 
 

CAUTION 

If  the  input  power  is  higher  than  15W  and  the  power  amplifier  is  not  correctly  tuned, 
the  safety  devices  will  switch  to  STBY.  After  switching  the  amplifier  to  STBY,  the 
amplifier will automatically reset and switch back to OPR mode after abt. 2 seconds.

 

 
 

A  tuning  table  is  delivered  with  the  power  amplifier.  Select  a  band  with  band  switch  and 
choose the setting of  “TUNE” and “LOAD” according to the table. 
 
 

NOTE 

Delivered  tuning  table  was  made  for  50  Ohm  loading  of  PA  (dummy  load).  Each  amplifier 
should  have  different  values  depending  on  used  frequency  and  used  type  of  antenna. 

Make 

your own table

 valid for your real conditions. 

 
 
 

Tuning Table

 shows proper tuning values for 

50 Ohm termination

Содержание OM4000HF

Страница 1: ...r s Manual External Radio Frequency Power Amplifier OM4000HF Model 4000HF Array Solutions 2611 North Beltline Rd Suite 109 Sunnyvale Texas 75182 USA Tel 214 954 7140 fax 214 954 7142 E mail info array...

Страница 2: ...5 3 GENERAL DESCRIPTION 6 3 1 HF part 6 3 2 Power Supply 7 3 3 Safety Devices 8 4 INSTALLATION 8 4 1 Grounding 8 4 2 Coaxial Cable 8 4 3 Control Cable 9 4 4 Mains Supply 10 4 5 Cooling 10 5 OPERATION...

Страница 3: ...Page 3 of 18 7 APPENDIX 17 7 1 Block Diagram of OM4000 HF Power Amplifier 17...

Страница 4: ...Automatic switching to STBY when reflected power is 350W or higher Intermodulation distortion 32dB below nominal output Suppression of harmonics 50 dBc Tubes 2x FU728F Ceramic tetrode Cooler Centrifu...

Страница 5: ...e Read next safety instructions carefully first before you will start to install and operate power amplifier NEVER VIOLATE NEXT RULES WARNING NEVER ALLOW CHILDREN to play around PA or to touch power a...

Страница 6: ...The amplifier is an A category product In a household it can influence other electric appliances In such cases the user is responsible to take proper actions to mitigate this disturbance CAUTION Read...

Страница 7: ...ft start is provided using relays and resistors The high anode voltage is made by combining 8 x 420 V total 3360V 2 5A Each has its own rectifier and filter In the high voltage circuit safety resistor...

Страница 8: ...has to be grounded properly Connect the screw on the rear panel of the amplifier to your local grounding system with a copper cable use a cross section of 4 mm2 at least Connect your transceiver to t...

Страница 9: ...tching Modern transceivers they have a time delay between PTT switching and power output CAUTION If you are using and older transceiver or transmitters without time delay we recommend to connect the P...

Страница 10: ...owed Do not obstruct air intake and exhaust areas of the PA The centrifugal blowers provide the necessary cooling of the amplifier even during long contests The main blower is activated by switching t...

Страница 11: ...plifier in the standby mode rather than switch it off 5 1 Operation Elements There is couple of operational elements accessible or visible on the front panel BAND Band selector switch not in the pictu...

Страница 12: ...50 Ohms load resistance is connected at the antenna output CAUTION The operation of a mistuned PA will cause malfunctions the increase of grid current the GRID MAX LED will light up and problems with...

Страница 13: ...ifier is ready for operation 4 Reduce the power output of your transceiver to the minimum 5 Switch OPR STBY to OPR position OPR LED lights up 6 Choose the TUNE position of multi meter 7 Transmit mode...

Страница 14: ...eed 100W otherwise PA will be damaged After this procedure the amplifier is tuned correctly and ready to give 1500W output power in all operation modes At optimal tuning and full output power a positi...

Страница 15: ...ter abt 2 sec the control circuits will switch the amplifier back to OPR CAUTION If the fault will repeat 3 times after each other the control circuits will turn the amplifier to STBY Bringing the amp...

Страница 16: ...m tube damaging contact the manufacturer or your dealer for ordering new one You will get instructuions how to change tube and how to preset proper parameters too Be very careful you will do it only o...

Страница 17: ...Page 17 of 18 7 APPENDIX 7 1 Block Diagram of OM4000 HF Power Amplifier...

Страница 18: ...Page 18 of 18...

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