In article ,
Henry Kolesnik wrote:

Jim
Who made your TRF with this cap and are the dials calibrated, if so f or
wavelength?
tnx

Well, it's a mystery. There is no manufacturer's name on it anywhere. And
all the parts are from various well-known parts vendors (except no labels
on the coils). There are several theories:
Might be a home-built set - if so, it's incredibly well done, including
an engraved front panel
Might be built from a kit - but then you'd think the kit manufacturer
would have put a name on it somewhere.
Might be a factory-built set for some department-store chain that was
to attach their own brand label, tho there is no evidence that one
ever was attached.
Might be a factory-built set and the maker is deliberately non-identified
to avoid paying royalties on the Neutrodyne patents. Which could also
apply to a kit. I read some early superhets were sold as kits to get
around paying patent royalties.
Someone suggested a fly-by-night manufacturer, who would come into a
village with a wagon load of receivers, and secretly bring another
wagon with a transmitter. The transmitter would assure they had a
good signal while they were selling the receivers; and once they were
all sold they could move on. However this receiver is certainly not
shoddily constructed.

Any other theories?
--

jhhaynes at earthlink dot net