Re: [coldwarcomms] Re: Alexander AK
- On 1/1/13 9:02 PM, widebandit wrote:
> <http://www.alcatel-lucent.com/bstj/vol47-1968/articles/bstj47-7-1511.pdf>Yes, that would explain the ARS date.
> A smaller J atop the big J. The 1988 date may reference the 75' tower
> extension to improve propagation reliability - Alexander, Tucker, and W
> Helena received these extensions...
>>> A building addition that's a story taller than the original, inThe picture on page 1529 of vol 47 makes it far clearer than the imagery did.
>>> effect shadowing the tower in that direction.
> The second story is actually the HVAC mezzanine; part of the original
> construction - again see the above BSTJ papers. Both Alexander and
> Arkabutla main stations are the same...
1511.pdf also explains two aspects.
a) The unified (tower atop) eliminated/greatly reduced the need for custom
waveguide; you knew the distance/direction between tower and rack.
b) The straight tower kept the horn feed & thus waveguide inside the legs.
Fig 10 of an aux station makes you wonder why it won't just tip over; the
building is all within the tower legs...
- Good catch - nice term project for a CE grad student but probably not sufficient for a dissertation. At 1/16 scale the model horns were about 15-1/4" tall...
Minor observation: The pyramidal horn dimensions in Fig. A1 p85 are at odds with KS15676 dimensions given in BSP 402-421-400 Fig. 1 (Fig. 1 is in the KS15676 photo album). To wit: (when was the last time you heard someone say that?) - Fig. A1 shows the horn 1-15/16" taller than the BSP. Lest you think that's no big deal, it's almost 2/3 wavelength at 3,950-MHz. Either the BSP is in error, or someone made a mistake in Fig. A1 of the CSU wind study - whaddya think?
- wa -
> I found a paper on horn windloading, done by CSU for RC&R, and L-L.
> I suggest that Albert may wish to add it to our attic.
> I also found a worksheet on Sayerville's loads.