Looking for 2m RF amp design using 2N6083 - HomeBrew Forum at eHam.net

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eHam.net Forum : HomeBrew : Looking for 2m RF amp design using 2N6083

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Looking for 2m RF amp design using 2N6083	Reply
by PA3GMP on October 25, 2009	Mail this to a friend!
DR OM's, Recently I was given a 2N6083 RF PA transistor which had never been used. Since I am on a tight budget an live in a QTH (ZS6) where such parts are hard to find and expensive when found, this is an opportunity not to be wasted. :-) I am therefore looking for a good design for a 2 meter (144-146MHz) RF PA using this transistor. Something like 1W input and 20-30W output would be great. Suggestions, anyone? All responses will be greatly appreciated!! 73 de Frank ZS6TMV / PA3GMP

RE: Looking for 2m RF amp design using 2N6083	Reply
by KI4IOV on November 12, 2009	Mail this to a friend!
Try Motorola application note AN721 - it has a sample amplifier design using this transistor. Get it here: http://www.datasheet.org.uk/pdf/Datasheet-018/DSA00307924.pdf Hope this helps! 73 de John KI4IOV

RE: Looking for 2m RF amp design using 2N6083	Reply
by PA3GMP on November 13, 2009	Mail this to a friend!
Hi, John, Thanks for the tip. I had seen that one previously, and I am not sure I am sufficiently versed in VHF technology to come up with a well designed RF amp on the basis of this application note. Essentially it's a whitepaper on impedance matching theory as applied to certain Motorola semiconductors. The example given is still pretty far from a finalized design - what with dimensioning the L/C networks for 144-146MHz, PCB layout, decoupling and all. If I were more experienced with VHF PA designs that would be a breeze, I'm sure, but in that case I would no doubt be able to take existing designs using other transistors and modify them accordingly. Still your response is greatly appreciated. It looks like this application note is going to be the only thing available... so maybe I should have a go at it anyway. :-) 73 de Frank PA3GMP / ZS6TMV

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