08-08-2018, 01:49 PM
Ron
From a data sheet : The MRF492 is a 12.5 V low band VHF large-signal power amplifier applications in commercial and industrial FM equipment.
That is not to suggest that you couldn't run it in AB mode so that it is fairly linear for SSB use but it was designed for FM use. I didn't find any full specs on a quick search but it might be difficult to get the input and output impedance matching networks designed for best operation without the full data sheet.
What are you going to drive this device with ?
Specs suggest 11d-13dB stage gain so about 7-10 watts of RF drive required from your 6M driver, allowing for some losses due Z mismatches..
Most modern HF/6 rigs already do around the 100W mark on 6M, though I do have a modified 27MHz CB that is channelised on 50MHz SSB and I have a modified CB linear for after that. Pity I haven't had power on it for at least the last 5 years as it was great for low-power-consumption monitoring of 50.110 at the old QTH. ( https://www.vk4adc.com/web/vhfuhf-projec...conversion )
Doug
From a data sheet : The MRF492 is a 12.5 V low band VHF large-signal power amplifier applications in commercial and industrial FM equipment.
That is not to suggest that you couldn't run it in AB mode so that it is fairly linear for SSB use but it was designed for FM use. I didn't find any full specs on a quick search but it might be difficult to get the input and output impedance matching networks designed for best operation without the full data sheet.
What are you going to drive this device with ?
Specs suggest 11d-13dB stage gain so about 7-10 watts of RF drive required from your 6M driver, allowing for some losses due Z mismatches..
Most modern HF/6 rigs already do around the 100W mark on 6M, though I do have a modified 27MHz CB that is channelised on 50MHz SSB and I have a modified CB linear for after that. Pity I haven't had power on it for at least the last 5 years as it was great for low-power-consumption monitoring of 50.110 at the old QTH. ( https://www.vk4adc.com/web/vhfuhf-projec...conversion )
Doug
Doug VK4ADC @ QG62LG51
http://www.vk4adc.com
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If you have a comment or question, post it as it may trigger or answer the query in someone else's mind.
http://www.vk4adc.com
This Forum is only going to be as interesting as the posts it contains.
If you have a comment or question, post it as it may trigger or answer the query in someone else's mind.