AM & FM frequency question

[amos]

Hi,

Keith Lake posted below about an AM freq monitor on 930, and a couple of FM SCA receivers on 93.3... and that reminded me of a question I've wanted to ask.

Back "in the day" was there any connection between a station's AM and FM frequency?

The station Keith mentioned from Washington, NC had 930khz and 93.3mhz. I worked for whky am-fm hickory, nc at 1290khz and 102.9mhz. in vidalia, ga there's co-owned wvop and wtcq at 970khz and 97.7mhz. in patterson, nj wpat am-fm have 930khz and 93.1mhz. In Boston, WBZ is 1030 and WODS is 103.3. (owned by infinity now, were they co-owned before deregulation?)

i don't mean every am-fm combo had this. lots don't. wbt and the old wbt-fm (1110 - 107.9) wasn't even close. and there are am frequencies that don't have a "corresponding" fm freq. but for lots of stations between 920 and 1600 am was there an original fm assignment?

-amos<P ID="signature">______________
</P>

 

[Banjomax]

> In Boston, WBZ is 1030 and WODS is
> 103.3. (owned by infinity now, were they co-owned before
> deregulation?)

The WBZ-FM graced three different frequencies in Boston over the years. Actually four, if you count the years at 46.7 MHz in the old FM band. The first stop for WBZ-FM when the FM band was moved up was at 100.7. About a year later (1947-ish) 'BZ moved to 92.9. At some point in the early '50s, Westinghouse decided it wanted out of the FM game and turned in all of its FM licenses. In 1956 Westinghouse decided abandoning FM wasn't such a good idea after all, and WBZ-FM re-emerged at 106.7. Westinghouse sold 106.7 to Greater Media in 1981, and the rest is hi...er, the rest can be read in the Boston Radio Archives.

http://www.bostonradio.org

 

[CW]

> Back "in the day" was there any connection between a
> station's AM and FM frequency?
>
> i don't mean every am-fm combo had this. lots don't. wbt
> and the old wbt-fm (1110 - 107.9) wasn't even close. and
> there are am frequencies that don't have a "corresponding"
> fm freq. but for lots of stations between 920 and 1600 am
> was there an original fm assignment?

FM freqs have changed (as have AMs) over the years......and some evidently just got plain lucky in getting something close to what they already had on AM....but remember the original FM band was in the 42 Mhz Lowband VHF range!

 

[amos]

> > In Boston, WBZ is 1030 and WODS is
> > 103.3. (owned by infinity now, were they co-owned before
> > deregulation?)
>
> The WBZ-FM graced three different frequencies in Boston over
> the years. Actually four, if you count the years at 46.7
> MHz in the old FM band. The first stop for WBZ-FM when the
> FM band was moved up was at 100.7. About a year later
> (1947-ish) 'BZ moved to 92.9. At some point in the early
> '50s, Westinghouse decided it wanted out of the FM game and
> turned in all of its FM licenses. In 1956 Westinghouse
> decided abandoning FM wasn't such a good idea after all, and
> WBZ-FM re-emerged at 106.7. Westinghouse sold 106.7 to
> Greater Media in 1981, and the rest is hi...er, the rest can
> be read in the Boston Radio Archives.
>
> http://www.bostonradio.org
>


wbz am/fm was not a good example, i see... but the other examples and i'm sure there are lots more sure do work. does anybody have any info on how these happened? it just seems too much to be a coincidence.

amos<P ID="signature">______________
</P>

 

[John_U]

> wbz am/fm was not a good example, i see... but the other
> examples and i'm sure there are lots more sure do work.
> does anybody have any info on how these happened? it just
> seems too much to be a coincidence.
>
> amos
>
Hi,

My guess is that when FM moved to the 88-108 band there was nobody there and the FCC had a wide open table of allotments. So the AM broadcasters applied for the FM licenses. And since there was nobody on the band yet, they had a wide choice of what frequency to apply for and not much competition. So it doesn't take much to imagine what is going through the PD's mind... AM at.. FM at...

John

 

[jonbruce]

> Hi,
>
> Keith Lake posted below about an AM freq monitor on 930, and
> a couple of FM SCA receivers on 93.3... and that reminded me
> of a question I've wanted to ask.
>
> Back "in the day" was there any connection between a
> station's AM and FM frequency?
>
> The station Keith mentioned from Washington, NC had 930khz
> and 93.3mhz. I worked for whky am-fm hickory, nc at 1290khz
> and 102.9mhz. in vidalia, ga there's co-owned wvop and wtcq
> at 970khz and 97.7mhz. in patterson, nj wpat am-fm have
> 930khz and 93.1mhz. In Boston, WBZ is 1030 and WODS is
> 103.3. (owned by infinity now, were they co-owned before
> deregulation?)
>
> i don't mean every am-fm combo had this. lots don't. wbt
> and the old wbt-fm (1110 - 107.9) wasn't even close. and
> there are am frequencies that don't have a "corresponding"
An interesting one was KUDU Ventura,Ca. 1590am and 95.1 FM, kind of a backwards corresponding thing. Also, back in the old days I noticed KHJ AM at 930 and the FM at 101.1 would come on at the same setting on the radio when you changed the AM/FM switch.









> fm freq. but for lots of stations between 920 and 1600 am
> was there an originaæ™@ assignment?
>
> -amos
>

 

[amos]

> Also, back in the
> old days I noticed KHJ AM at 930 and the FM at 101.1 would
> come on at the same setting on the radio when you changed
> the AM/FM switch.

now that you mention it, i also remember some am/fm stations that you didn't have to move the dial when you changed the am/fm switch. i can't remember what stations, but i do remember thinking it must be a very cool concidence because certainly different radios would be different. but maybe that was no concidence after all.

amos<P ID="signature">______________
</P>