While not necessarily a giant boat anchor, it's still a large piece of equipment just to amplify a single channel of audio - but that's what I
like about it, it's simple compared to a lot of other signal tracers.
This one was picked up from a local antique store as not working, but
all it needed was a good switch cleaning and the tubes re-seated.

It's working and sitting in my main room as a display piece for now, it
will get new filters at some point because 75 year old capacitors are
not what's for dinner.

I did a photo retrospective of the device, if you'd like to check it
out, it's here:

https://wereboar.com/projects/index.php/2024/09/19/the-mcmurdo-silver-sparx-model-905-signal-tracer-photos/

Some of the images also show up in radiomuseum's exhibit page on the
device.


--
Vintage electronics, hamfest pictures, and general junk I like. https://wereboar.com/projects

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