23cm ldmos from ebay cheapy 450Mhz PA
Posted: Tue Apr 26, 2016 1:55 pm
Have a look at this little beauty rejigged to 1275mhz, thanks to K5TRA for his ideas
Used 41mm small semi rigid for the loops and a couple of .5-10pf trimmers which have since been laid down and pushed hard up against body of the PA
It gets 16db gain running flat out, only tested to a few watts so far and need a much bigger heat sink
Sent a test pattern to our local repeater so it works
The capacitance values were changed to around a third of the the recommended at 450mhz
ATCs supplied covered all the values required
Yet to drive it a little harder and who know how stable this thing will be
Cost $41USD
Used 41mm small semi rigid for the loops and a couple of .5-10pf trimmers which have since been laid down and pushed hard up against body of the PA
It gets 16db gain running flat out, only tested to a few watts so far and need a much bigger heat sink
Sent a test pattern to our local repeater so it works
The capacitance values were changed to around a third of the the recommended at 450mhz
ATCs supplied covered all the values required
Yet to drive it a little harder and who know how stable this thing will be
Cost $41USD