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Important safety instructions: 
 

 

 

The amplifier contains high voltage circuits. Never turn the amplifier on 
without the upper lid in place. 

 

 

The OM3006  amplifier is not to be used in a wet or humid environment nor 
to be exposed to rainfall. 

 

 

The amplifier must be installed in such a way that free flow of hot air from 
the tube is allowed. The amplifier must not be installed in a constrained 
surrounding (i.e. tight shelves etc.) 

 

 

During long operation the upper lid and the vent grid of the amplifier can 
reach high temperatures that can cause burn injuries. Do not touch these parts 
of the amplifier during operation. 

 

 

The amplifier must be grounded during operation. 

 

 

During operation the amplifier must be installed in such a way that the rear 
power supplies are accessible. 

 

 

The amplifier can be operated only if both supply cables are connected. 
OM3006  reaches optimal parameters when it is connected to 2 phases. 

 

 

Do not turn the amplifier on without having connected the antenna. 
A hazardous HF voltage may built up on the antenna connector after turning 
the amplifier on with no antenna connected.  

 

 

Before opening the upper lid of the amplifier make sure that both power 
supplies have been disconnected for at least 5 minutes allowing the 
electrolytic capacitors to discharge fully. Never turn the amplifier on without 
the upper lid in place. 

 

 

Make sure that all screws holding the case together are properly in place and 
tied before carrying the amplifier by the handles. 

 

 

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

 

Содержание OM2006

Страница 1: ...Instruction Manual OM3006 50 MHz POWER AMPLIFIER OM POWER s r o 930 30 Báč 126 SLOVAKIA ...

Страница 2: ...ay that the rear power supplies are accessible The amplifier can be operated only if both supply cables are connected OM3006 reaches optimal parameters when it is connected to 2 phases Do not turn the amplifier on without having connected the antenna A hazardous HF voltage may built up on the antenna connector after turning the amplifier on with no antenna connected Before opening the upper lid of...

Страница 3: ...put Suppression of harmonics 50 dBc Tube GU78b Ceramic tetrode Cooler Centrifugal blower axial blower Power supply 2 x 230 V 50 Hz one or two phases Transformers 2 pcs of toroidal transformer 2 5 kVA Protection circuits SWR too high Anode current too high screen current too high grid current too high Mistuning of power amplifier Hot switching protection Soft start for protecting your fuses switch ...

Страница 4: ...adband input circuit with an input impedance of 50 Ohms This adaptable input circuitry ensures a good input SWR better than 1 5 1 on all short wave bands The output of the amplifier is a Pi L circuit The ceramic capacitor for TUNE and LOAD are divided This enables the amplifier to be tuned exactly and makes it possible to easily return to the previously set positions after band change Top view on ...

Страница 5: ... is stabilized by means of zener diodes SAFETY DEVICES Control and monitoring circuits ensure control and safety of the circuits of the device during malfunction of the PA They are placed on the Control board which is located on the subpanel Putting the power amplifier into operation Coaxial cable The output of the transceiver is to be connected with the input of the amplifier via RG58 or similar ...

Страница 6: ...th an EURO end Each cable is to be switched to another phase of your main supply system Both of them have to be able to deliver a power of 2 5 kVA If you use only one phase you have to connect both cables to this one phase Your main supply has to be able to deliver 3 5 kVA on this one phase In this case the power amplifier can t deliver full output ATTENTION In each case the power amplifier has to...

Страница 7: ...STBY if WAIT LED is on or the amplifier is off your transceiver is in bypass mode directly connected to antenna Maximum 400Watts RF OUTPUT Bar graph shows output power REFLECTED POWER Bar graph shows reflected power of the antenna 350W maximum or amplifier switches to STANDBY mode Ig2 bargraph measerus the currency of the second grid in the range from 20mA to 80mA HV IP TUNE bargraph measure the a...

Страница 8: ...step the blower of tube is switched on the multimeter bargraph measures the high voltage the normal value is 3 4 kV the WAIT LED lights up After switching on you have to check the functioning of the blower Air must be blown out of the ventilating apertures above the tube If there is any failure you have to press the OFF button immediately Heating the tube takes about 150 seconds After this time th...

Страница 9: ...ower of approximately 2000 W is reached 10 Repeat steps 6 and 7 11 Set TUNE to maximum output power After this procedure the amplifier is tuned correctly and ready to give 2000 W output power in all operation modes At optimal tuning and full output power a positive 50mA voltage goes through the second grid If less output is desired you can simply decrease the load of the transceiver Please note Sh...

Страница 10: ...amplifier back to OPR If the fault will repeat 3 times after each other the control circuits will turn the amplifier to STBY Brining the amplifier to OPR is enabled by using the OPR STBY switch After the reaction of safety circuits the FAULT LED will be lit up for approx 5 sec depending on the nature of the fault Flashing LED signalizes IP anode currency exceeded HV low anode voltage FAULT reflect...

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