- First Light 12 Ghz - 1 Update
- New to radio astronomy - 1 Update
Job Geheniau <jobge...@gmail.com>: Apr 22 08:57AM -0700
Yes finally first light at 12 Ghz, with test Satellite Astra 3B
Trying Moon driftscan tonight.
But an adapter connector n to f for the LNB was broken.,
Purchased new and installed today. NO SIGNAL AGAIN ????
Fortunately my father had a multimeter from the 70's (I forgot to bring
it), but voltmeter is voltmeter...
And guess what, the Bias-T connected to the air spy mini didn't give 13.8
volts.
Probably killed by a short circuit of the broken connector!
Fortunately I still had a sparebias-t with me and had taken it with me.
And fortunately no damage to sdr's
PPFFFFFFF
Everything works now! But before you find out that the biast had died. I
was discouraged by no signal.
Glad now.
Very curious if the moon driftscan at 12 Ghz will work tonight.
All remote controlled 50 km away of course....
Job Geheniau
The Netherlands
[image: Screenshot 2021-04-22 at 5.25.23 PM.png]
[image: IMG_0808.jpg]
"Marcus D. Leech" <patchv...@gmail.com>: Apr 21 05:04PM -0400
On 04/21/2021 06:41 AM, B & MR Randall wrote:
> Hope that helps!
> --
> Dave
I'll point out that the original Green Bank 300ft radio telescope was a
"transit" type instrument. Carefully aligned on the N-S
meridian line, and driven only in elevation (effectively in declination).
Our (www.ccera.ca) 21cm dual-polarization spectrometer telescope is also
a transit-mode ("drift scan") instrument.
Such instruments are very good for doing sky-mapping and broad surveys.
Not quite so good for doing studies that require
"following" a specific object for a period of time to allow long
integration times for that specific object. Most pulsars require
tracking, since their pulse brightness is very low, so you have to
integrate for a long time--usually requiring tracking.
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On Apr 22, 2021, at 13:21, Big Bob <rjv...@gmail.com> wrote:
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