Monday 1 December 2014

SIX Metre amplifier

I've built a couple of amplifiers recently. This one is for Six Metres, I just followed a design from OZ1PIF's website. It uses eight IRF510 MOSFETs. Output should be up to 250 Watts but I've not driven it hard enough to obtain that amount of power but 10 in produces 150 out so I'm happy with that. Seems to tie in nicely with the figures on OZ1PIF'S site. It's QRP to some but I've rarely run more than 20 Watts on Six from anything home-brewed here and I once worked VK with that.



Inside eight IRF510's, RX pre-amp and low pass filter















No front panel meter, no high swr protection, no cooling fan but the MOSFETs are very cheap!



Front panel. The case is from a faulty SMPS.






A card for the amp!