2xBLF188XR HF AMPLIFIER 10-160m

[@bob4analog]

Awesome! Nice job! Given the power needed, this could probably loaf at 3kW dead key! Those BLF188XR are literally indestructible.

[@BoxBuilderIdaho]

bad ass as always keep up the good work.

[@TimHavens]

What power supplies am I seeing in there? I love this design...looks very clean and simple.

[@KF8OD1]

The 50vdc supply is a Mean well RSP-2400-48.

[@62bostonmanortheastcorner20]

blf188xr are awesome for sure!! Great devices also great job on your amps i have been following your videos. 73s

[@KF8OD1]

Thanks for your interest and compliment.

[@62bostonmanortheastcorner20]

yes i feel that these devices are awesome long as ya can keep them cool! great deal by running two if ya can loaf them at 1500 watts now cant you find another filter so you can run them at 1500 watts?

[@KF8OD1]

This filter is rated 1kw ccs, no problem to run 1.5kw pep through it, that is how I run mine. I rate the amp at 1kw because imd is better at 50% duty cycle. In fact I know it will handle 2kw pep! ; )

[@BoxBuilderIdaho]

very nice. I like it..

[@billpawley2849]

Just a suggestion: Maybe make the fans run constant speed instead of speeding up/slowing down with the modulated signal. Possibly put a sensor in to automatically increase/decrease fan speeds. Like I said, just a suggestion (and I just realized this is from 2016 so you may have already done this)......N4PCB

[@TimHavens]

Where are you getting your copper spreader board for the heatsink? Are you milling them or buying the 2x version from someplace?

[@KF8OD1]

I make everything by hand. The heat spreader is 4" x 5" x 1/4" copper buss bar. I flow solder the two device to the copper and screw it down with some heat sink compound. I build my own amps. I don't machine any of the surfaces. I am just a rag chewer running 1kw. If you want to run these devices at their max rating you might want to machine the surfaces.

[@savirien4266]

Where do you get your enclosures?

[@KF8OD1]

Par-Metals. www.par-metals.com. This enclosure is part no. 20-16128N. 16x12x8 clear alodine finish.