On Sat, 25 Aug 2012 21:25:14 -0700, miso wrote:

I didn't know those "double" mounts existed in real life.

Look on any decent vertical antenna mounting and you'll find them:
http://awapps.commscope.com/catalog/andrew/doc/Pipe_Mount_Kits.aspx?id=0000002%2Ft009_r02125_v0.p df
About $60/set.

Antenna Spec used to make a really fancy machined aluminum version
that I can't seem to find. That's what's needed to pipe mount a 21ft
Stationmaster or solid dish with a high wind loading.

I have hacked
them together buying long bolts at OSH and COTS antenna mounts. But that
double clamp looks much better.

What you really want is the thick zinc galvanizing. It's the dull
gray stuff you see on all the telephone pole hardware. It lasts. The
thin galvanizing on the commodity hardware doesn't last and often
rusts in place. I have a large pile of old Metricom hardware that is
similar to the APSR-616 but thinner and with 1/4-20 hardware. It's
functional for very small antennas, but nothing big and heavy.

In my rounds today, I noticed a large sat dish on the roof at a strip
mall. No LNBF on it. I guess when a tenant leaves crap on the roof, the
owner pulls the cable out when cleaning up, but odd they pulled the
LNBF. Maybe the F-connectors had rusted and it was less work to pull the
LNBF.

That's standard procedure. If it's a tenant occupied structure, such
as a gas station, or a rental, it's likely that the new tenants will
need to use the dish again. However, the LNB can be re-used
immediately at other customers, so it's removed and re-installed
elsewhere. If it's transmit/receive assembly, it's the most expensive
part and is usually removed immediately.

It would be interesting to know the percentage of sat dishes mounted but
not hooked up.

We have 3 in the neighborhood. One more (me) as I'm pulling the plug
on DirecTV. I'm paying $75/month, 30% of which goes for paying to
watch commercials.

Anyway, it was one of those heavy duty mounts and a 36x24
oval dish.

I've run into sat internet gear hooked up to instrumentation in the
boonies. There are only so many "slots" on those GOES birds to send
data. For $50 a month, it is chump change for some outfit that is doing
seismic studies in East Bum****.

Ku band is packed full. All the new stuff is on Ka band. At
30-40GHz, dish alignment and stability is rather critical.



--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558