Saturday, January 31, 2026

Status of OHR-100A build; Tallboy (20m) arrives

OHR-100 status - click for larger
The 20m OHR-100A kit build is progressing nicely but with a few slowdowns.

Capacitor values can be referred to in a variety of ways and, in the case of the kit's build instructions, both ways are used. The inventory sheet and the step-by-step instructions each use different methods to refer to some (most) of the capacitors.

'82' in the inventory means 82pF. But '820' in the instructions also means 82 pF.

Also, a few are missing. Four of the same value are called for; I have three.

Fortunately, Mouser has no minimum order and they are quick to ship.

No biggie, it'll just take a bit longer to complete the build than I'd anticipated. But the kit has sat unbuilt for 30 years; what's a few more revolutions on the big blue marble...

As a consolation, my Hilltopper Tallboy arrived today and there's more to it than I expected.

That's not a bad thing and I'm half-tempted to let the OHR-100A rest a bit as I complete its small parts order - and start on the Tallboy.

The soldering station is out, as are all the relevant tools and working space. And, finally, the weather is cold (24F/-5C) here in Florida and therefore conducive to kit-building.

I can't praise enough the packing and level of detail that went into the arrangement of how the parts are sorted. You guys at 4SQRP are amazing!

See for yourself:

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Matched crystals

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Note that SMD parts are pre-installed

 

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UPDATE: Couldn't wait. Construction of the Tallboy begins (parts on order for the 100A):


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