[Hammarlund] Hammarlund Digest, Vol 172, Issue 4

[manualman at juno.com]

The 15-meter band was designated by the 1947 International Radio
Conference. The 15-meter band opened to amateurs for CW operation only in
the United States on May 1, 1952, and telephony operations were
authorized above 21250 kHz on March 28, 1953.

Manufacturing dates of the Hammarlund HQ-129X were roughly from 1946 to
1953.

Pete, wa2cwa
www.manualman.com

On Mon, 23 Mar 2020 10:07:55 -0700 Richard Knoppow
<1oldlens1 at ix.netcom.com> writes:

>     I don't think the 15 meter band was established during the 
> manufacturing lifetime of the HQ-129-X. Red lettering makes it an 
> early model. Cycles was not changed to Hertz until pretty late, 
> way past the time these receivers were built.
>     I have been told but can't say personally, that the dials for 
> the HQ-140 will fit the HQ-129 and HQ-120. So one could up grade 
> and get band spread dial with   15 meters on it.
>     Actually, I have an HQ-120-X where both dials have 
> delaminated. If the dials for the later models would fit I could 
> fix it. I have not done a serious search for any. Perhaps someone 
> here knows if this works.
>