Re: [IRCA] Off the wall question

[Deane McIntyre <dmcintyr@xxxxxxxxxxx>]

On 2010-04-23, at 8:00 PM, Stan wrote:

> I was noticing the other day, my 1948 Firestone radio I keep in the workshop goes up to 1700kc. The X band wasn't officially used until around 1993 if I'm correct.
> Why does it go that high in the 1st place?
> Does anyone else know of some of the older tube, and transistor radios that go that high??
> 


Many of the tube radios of that era went up to 1700 or sometimes even 1800 kc,
for example the GE radio that my parents received as a wedding gift in 1950
goes up to 1700 (I still have it, it was the radio I stated to DX on).

The top end of the AM broadcast band was extended from 1500 to 1600 in 1941 as
a result of the 1937 Havana treaty. Some experimental stations operated between
1500 and 1600 as early as the mid 1930's however.

Above 1600 we had the original police band, one way only to the patrol cars,
which was phased out in the 1960's I believe. This was the reason that radios
of that era went above 1600 - did not add to the cost of the radio so the addition
of the police band was "free". 

In the early 1970's I remember at night (I lived near Toronto at that time)
one would hear a steady fairly low pitched tone near 1620. Anyone have
any idea what that was?
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