Ham radio hf linear amplifier solid state 1kw 28volt 22watt SSB gives 956watts

  

Ham radio hf linear amplifier solid state 1kw 28volt. 27.6v PSU with 22watt SSB drive gives 956watts pep (as shown to me by the guy i bought this from, i do not have test equipment to verify). On FM carrier on my non-professional meter it gives 478watts. The power supply required to run this is a 28 Volts DC at 50amps. It has input over drive protection. It does not work on top band, the frequency range is from 3 to 30MHz. I have owned this since 2015 and has only been used occasionally with no issues. Works incredibly well on pile ups as no warm up time since solid state. Have been told does not distort audio when transmitting at legal limit. Have been asked about output power accuracy. Ive opened the amplifier to take some pictures and see what power transistors are in there. You can see from the pictures that it uses 1x driver MRF422 and 4xMRF422 in push-pull configuration for main output. That was measured using attenuators, signal generator and spectrum analyser. I dont have that equipment so as i mentioned above i cant verify this but with my simple power meter on FM is gives just under 500watts. This amplifier is highly linear. It uses Motorola MRF422 transistors and as you can see from the power input to power output graph from the data sheet they only start to deviate from a strait line near maximum power. Compare that with some other transistors in modern amplifiers that are banana shaped and you can get a feel for how good this amplifier is in comparison. The bracket on the top of the amplifier has 2 x forced air blowers/cooling fans. Ive never needed to use these as only operated on SSB for short periods of time so have never plugged them into the unit to test. Both the fans are 24v so to make use of them simply plug the trailing wire into the socket in the rear of the amplifier if needed. This amplifier is ideal for anyone living off grid as can take direct battery power 2 x 12 storage batteries in series to give 24-28v potential so no need for a high power inverter. The data sheet for the MRF422 states up to 32volts then maybe you could increase power output to 1200watts but ive never done this and i dont know why you would want to but ive been messaged on here that is what these transistors are capable off at maximum pep but thats not what i imagine the designers envisaged and its certainly not a good idea. The amplifier has no need for band switching, it will operator over the entire 3-30Mhz range seamlessly. You just need to make sure that you antenna is matched with a very low swr or that you have a high power tuner in line. The item "Ham radio hf linear amplifier solid state 1kw 28volt 22watt SSB gives 956watts" is in sale since Wednesday, December 15, 2021.

This item is in the category "Mobile Phones & Communication\Radio Communication Equipment\Ham/Amateur Radio\Ham Radio Amplifiers". The seller is "bidolicious" and is located in Glasgow. This item can be shipped to United Kingdom.

• Brand: Contra Electronics Japan
• Type: Linear Amplifier
• Supported Modes: SSB
• Model: CP-1000X
• Band: HF
• Unit Quantity: 1
• Power: 1000 W