Instruction Manual
OM3500 HF
SHORTWAVE POWER AMPLIFIER
OM POWER, s. r. o. 930 30 Bác 126
SLOVAKIA
Page 1: ...Instruction Manual OM3500 HF SHORTWAVE POWER AMPLIFIER OM POWER s r o 930 30 B c 126 SLOVAKIA...
Page 2: ...y that the rear power supplies are accessible The amplifier can be operated only if both supply cables are connected OM3500 HF reaches optimal parameters when it is connected to 2 phases Do not turn t...
Page 3: ...stortion 32 dB below nominal output 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...
Page 4: ...power transformer with an input impedance of 50 Ohms This adaptable input circuitry ensures a good input SWR lower than 1 5 1 on all short wave bands The output of the amplifier is a Pi L circuit The...
Page 5: ...or the control grid 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...
Page 6: ...ith 2 cables with 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...
Page 7: ...lifier by pressing this button Heating of tube is on and after 3min of delay the amplifier will be ready for operation OPR STBY OPERATE you will be ready for operation At STBY if WAIT LED is on or the...
Page 8: ...mplifier to STBY mode Tuning instruction Please note Before starting tuning you have to check if the right antenna or a 50 Ohms load resistance is connected at the antenna output Switching on the ampl...
Page 9: ...2 positions set the position that is father to the right 8 Repeat tuning several times according to 6 and 7 9 Increase the input power until an output power of approximately 3500 W is reached 10 Repea...
Page 10: ...approx 1 sec the control circuits will switch the 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...
Page 11: ...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 OM3500HF reaches optimal parameters when it is connec...
