Call Letters Meaning on Wikipedia

Bob DeMattia
Fri Jun 14 08:40:13 EDT 2019

Yes, I transposed 1MX.  W1XM is also affiliated with MIT but I do not
believe it is from the 1920's.

The W1MX website also claims that it is the oldest station in the country,
but there are writings that state that
Harvard inspired 1MX, who in turn inspired 1YK.

Due to technical problems at 1MX, 1YK was the first of the two to be on the


On Fri, Jun 14, 2019 at 8:23 AM Rob Landry <> wrote:

> On Fri, 14 Jun 2019, Bob DeMattia wrote:
> > Just like commericial like the commercial callsigns WBZ, WGY, WLS, many
> > amateur callsigns of today still have the 1920's callsign system legacy.
> > University stations like MIT (W1XM),  WPI (W1YK),  and Yale (W1YU),
> > began as 1XM, 1YK, and 1YU respectively.
> I think MIT is actually W1MX. Call sign suffixes beginning with X used to
> be reserved for "experimental" radio stations.
> Rob

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