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News from kb8ojh.net

Simple Fixes for an RCA Volt-Ohmyst VTVM

posted 2013-03-04 at 05:18:

I had the good fortune to come across an apparently nice, but non-working, VTVM for a good price at a recent local hamfest, and upon bringing it home I found that it was satisfyingly easy to get working, making for a nice evening project.

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Hg services are down

posted 2012-08-25 at 17:51:

I'm migrating the web server from one VM to another, so the Mercurial repositories are temporarily down. I'll get them back up ASAP.

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The Drake TR-4 Mystery PTO circuit is no longer a mystery!

posted 2012-06-24 at 18:10:

I recently posted about a circuit in the PTO of my Drake TR-4 of unknown origin or use. Thanks to various web page readers and the members of the drakelist mailing list, I believe it has been identified! See the note on the original page with our conclusions.

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Drake TR-4 Mystery PTO Circuit

posted 2012-04-26 at 03:41:

My Drake TR-4 has a circuit hanging off the PTO that puzzles me. Maybe someone out in Internet land has an idea what it does...

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A Junk Box Hi-Z to 8 Ω Audio Adapter

posted 2012-04-22 at 19:07:

I had occasion to connect a modern communications speaker to a vintage receiver, so I rummaged through the junk box and slapped together an impedance adapter.

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