Hardrock-50 HF Amplifier Build Complete!

Today I finished building my Hardrock-50 50w HF Amplifier kit. It was pretty-much done yesterday, but needed a few final tweaks to complete.

I haven’t photographed every stage of the build process, but I’m sure you’ll get the gist of it! Apologies for the quality of these photos too… I was in solder-mode rather than photography-mode, so they’re not well lit or composed I’m afraid.

Continuing on from my previous blog post, I started by winding the torroids. My fingers hurt after doing these, and working with PTFE covered wire is a pain in the bum! There’s a fella in the US that can sell you a complete set of pre-wound torroids for a nominal fee, but where’s the fun in that?

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Next was soldering the metal stand-offs to the main board which was easy:

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Here you can see the bottom of the main board after I had soldered in all the through-hole components:

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And here is the top of the main board. A couple of the torroids were really fiddly to attach.

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This is the main board attached to the heatsink with the front and rear panels connected. The only big problem I had was that I snapped the drill bit while drilling the second to last hole, so the main board is only attached at the rear (but it isn’t going anywhere!)

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Here it is, alive!

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This photo shows me on the air with it for the first time last night:

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I’ll write another quick blog post later on showing the amplifier case in more detail and along side my Elecraft KX-3 (my photos haven’t synced via iCloud yet!)

Cheers

Josh

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2 thoughts on “Hardrock-50 HF Amplifier Build Complete!

  1. Looks like we have twin rigs . . . . mine is connected to a 640 foot horizontal delta loop . . . . . .
    Absolute4ly love it . . . get unbelievable reports on 20/80/160 there bands I work the most;;
    vy 73
    Jim K7GVM
    x-KL7IBT

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