Date
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Who knows the Triax TDS100LG ? - And hello, Klaus!
Von: "Ulrich G. Kliegis" <Ulrich.Kliegis@...>
Datum: Sun, 26 Feb 2023 21:59:47 +0100
the previous - very weathered - pre-2006 Hama Universal Single LNBF Lypsi HQ
(see https://amzn.eu/d/aTdRuhp).
Well, yes, after some wiggling and shifting, the SNR-1 panel shows a pretty
constant SNR of 10.0 dB, practically no change to before, the power, though,
jumped up from -34 to -28, rarely -27 dB.
The cable is the double shielded standard stuff we at that time, about 17 m from the
LNB to the SNR-1. At one point, it has to pass a window frame, done with one of
these flat feed-throughs.
I am pretty sure that that causes some reflections, then leading to the mediocre
SNR - Or what do the gurus here suggest? The frame-feed-through has clearly
seen better time, being exposed to rain and thing over all the years.
Just as an intermediate report.
And let me take the opportunity to send best regards to Klaus Fenger who
introduced me to all of this some almost 40 years ago. He called me today and told
me that he still reads this mail list and that he presently also has a hard time to
reanimate his Meteosat reception rig. He was among the five-heads group who
were among the first amateurs visiting Eumetsat, or what they were called at that
time, in Darmstadt. He started with a home built receiver, converters etc., displaying
the received images on a Commodore C64, iirc.
Have a look at his (and Per's) work on radioastronomy: Just feed Google with the
terms 'Klaus Fenger Radioastronomie'.
http://klaus.fengers.de/index.html
The images of Per and Klaus' dishes (listed in the Google results) deserve some
special attention. Some years ago, David and me enjoyed a visit to that dish
garden. Impressive. And a memorable meal prepared by Per's wife.
Off topic? Just slightly...
Cheers,
U.
Datum: Sun, 26 Feb 2023 21:59:47 +0100
Datum: Sun, 26 Feb 2023 19:45:14 +0000 (UTC),
Von: "geojohnt@... via groups.io"
Since I get around 13.7 dB SNR on BAS/HVS-1 with a 1 m dish on E
10-A, it shouldn't be worse on 10-B(?) and possibly a slight
improvement.
Really soon was today. The inverto IDLT-QDL412-ULTRA-OPN took the place ofWe shall see.You feed my hope - for better times and ratios with the new LNB - to
be mounted really soon. With the T90, I get an SNR of not more than 10.0 so
far.
the previous - very weathered - pre-2006 Hama Universal Single LNBF Lypsi HQ
(see https://amzn.eu/d/aTdRuhp).
Well, yes, after some wiggling and shifting, the SNR-1 panel shows a pretty
constant SNR of 10.0 dB, practically no change to before, the power, though,
jumped up from -34 to -28, rarely -27 dB.
The cable is the double shielded standard stuff we at that time, about 17 m from the
LNB to the SNR-1. At one point, it has to pass a window frame, done with one of
these flat feed-throughs.
I am pretty sure that that causes some reflections, then leading to the mediocre
SNR - Or what do the gurus here suggest? The frame-feed-through has clearly
seen better time, being exposed to rain and thing over all the years.
Just as an intermediate report.
And let me take the opportunity to send best regards to Klaus Fenger who
introduced me to all of this some almost 40 years ago. He called me today and told
me that he still reads this mail list and that he presently also has a hard time to
reanimate his Meteosat reception rig. He was among the five-heads group who
were among the first amateurs visiting Eumetsat, or what they were called at that
time, in Darmstadt. He started with a home built receiver, converters etc., displaying
the received images on a Commodore C64, iirc.
Have a look at his (and Per's) work on radioastronomy: Just feed Google with the
terms 'Klaus Fenger Radioastronomie'.
http://klaus.fengers.de/index.html
The images of Per and Klaus' dishes (listed in the Google results) deserve some
special attention. Some years ago, David and me enjoyed a visit to that dish
garden. Impressive. And a memorable meal prepared by Per's wife.
Off topic? Just slightly...
Cheers,
U.
Charlie
Ulrich,
I am not surprised to hear of your results with the Ultra PLL LNBF. Did you find it had to be pushed all the way in for "focus" or did you have room left for adjustment?On Tue, 28 Feb 2023 at 18:01, Ulrich G. Kliegis <Ulrich.Kliegis@...> wrote:
Von: "Ulrich G. Kliegis" <Ulrich.Kliegis@...>
Datum: Sun, 26 Feb 2023 21:59:47 +0100
> Datum: Sun, 26 Feb 2023 19:45:14 +0000 (UTC)
> Von: "geojohnt@... via groups.io"
,
> > Since I get around 13.7 dB SNR on BAS/HVS-1 with a 1 m dish on E
> > 10-A, it shouldn't be worse on 10-B(?) and possibly a slight
> > improvement.
> > We shall see.
>
> You feed my hope - for better times and ratios with the new LNB - to
> be mounted really soon. With the T90, I get an SNR of not more than 10.0 so
> far.
Really soon was today. The inverto IDLT-QDL412-ULTRA-OPN took the place of
the previous - very weathered - pre-2006 Hama Universal Single LNBF Lypsi HQ
(see https://amzn.eu/d/aTdRuhp).
Well, yes, after some wiggling and shifting, the SNR-1 panel shows a pretty
constant SNR of 10.0 dB, practically no change to before, the power, though,
jumped up from -34 to -28, rarely -27 dB.
The cable is the double shielded standard stuff we at that time, about 17 m from the
LNB to the SNR-1. At one point, it has to pass a window frame, done with one of
these flat feed-throughs.
I am pretty sure that that causes some reflections, then leading to the mediocre
SNR - Or what do the gurus here suggest? The frame-feed-through has clearly
seen better time, being exposed to rain and thing over all the years.
Just as an intermediate report.
And let me take the opportunity to send best regards to Klaus Fenger who
introduced me to all of this some almost 40 years ago. He called me today and told
me that he still reads this mail list and that he presently also has a hard time to
reanimate his Meteosat reception rig. He was among the five-heads group who
were among the first amateurs visiting Eumetsat, or what they were called at that
time, in Darmstadt. He started with a home built receiver, converters etc., displaying
the received images on a Commodore C64, iirc.
Have a look at his (and Per's) work on radioastronomy: Just feed Google with the
terms 'Klaus Fenger Radioastronomie'.
http://klaus.fengers.de/index.html
The images of Per and Klaus' dishes (listed in the Google results) deserve some
special attention. Some years ago, David and me enjoyed a visit to that dish
garden. Impressive. And a memorable meal prepared by Per's wife.
Off topic? Just slightly...
Cheers,
U.
Charlie,
Thanks for your reply.
Von: "Charlie" <charlie.johnson119@...>
Datum: Tue, 28 Feb 2023 21:31:23 +0000
Betreff: Re: [MSG-1] Who knows the Triax TDS100LG ? - And hello, Klaus!
An: <MSG-1@groups.io>
Antwort an: <MSG-1@groups.io>
pulled it back about 15 mm - which proved to be the optimum after about three
iterations - Adjusting was a one-man-show today. So, I ended with some spare way
in both directions.
Pretty central. I'll try to move it a wee bit there.>
The TV-LNBs sit sidewise of it with ample space.
Cheers,
U.
Thanks for your reply.
Von: "Charlie" <charlie.johnson119@...>
Datum: Tue, 28 Feb 2023 21:31:23 +0000
Betreff: Re: [MSG-1] Who knows the Triax TDS100LG ? - And hello, Klaus!
An: <MSG-1@groups.io>
Antwort an: <MSG-1@groups.io>
I started with the mount closest to the 'head' (the fat conic/cylindric part), then I
Ulrich,
I am not surprised to hear of your results with the Ultra PLL LNBF.
Did you find it had to
be pushed all the way in for "focus" or did you have room left for
adjustment?
pulled it back about 15 mm - which proved to be the optimum after about three
iterations - Adjusting was a one-man-show today. So, I ended with some spare way
in both directions.
I suppose if you want to rule out theExactly my plan.
flat pass-through you
could just use a basic F coupler for even 5 minutes or so out of the
window with it open.
Out of interest, whereabouts does the 10° E position sit on the
Wavefrontier's wide old
mounting rail? Fairly central or is the dish aligned such that it's
on the fringes?
Pretty central. I'll try to move it a wee bit there.>
The TV-LNBs sit sidewise of it with ample space.
Cheers,
U.
Charlie
Well that answers my thoughts there; particularly regards position; fairly central shouldn't be losing you that much for a 90cm reflector at all (in the case of the Wavefrontier I have read that it drops off quite harshly at the edges) and obviously you're not suffering the same "focus" position issues I have had with those LNBFs if you have room to spare.
If re-checking the azimuth on the 10E LNBF doesn't gain you a big boost I guess I would look at trying different models; there are loads around with fairly comparable performance to each other and usually fairly inexpensively. I've even got a cheap as muck old grey SLx branded single LNBF that seems to be stronger than my Inverto Ultra PLL..Not sure what happened with that failed delivery message you forwarded; email being funky I guess!
On Tue, 28 Feb 2023 at 21:59, Ulrich G. Kliegis <Ulrich.Kliegis@...> wrote:
Charlie,
Thanks for your reply.
Von: "Charlie" <charlie.johnson119@...>
Datum: Tue, 28 Feb 2023 21:31:23 +0000
Betreff: Re: [MSG-1] Who knows the Triax TDS100LG ? - And hello, Klaus!
An: <MSG-1@groups.io>
Antwort an: <MSG-1@groups.io>
>
> Ulrich,
>
> I am not surprised to hear of your results with the Ultra PLL LNBF.
> Did you find it had to
> be pushed all the way in for "focus" or did you have room left for
> adjustment?
I started with the mount closest to the 'head' (the fat conic/cylindric part), then I
pulled it back about 15 mm - which proved to be the optimum after about three
iterations - Adjusting was a one-man-show today. So, I ended with some spare way
in both directions.
> I suppose if you want to rule out the
> flat pass-through you
> could just use a basic F coupler for even 5 minutes or so out of the
> window with it open.
>
Exactly my plan.
> Out of interest, whereabouts does the 10° E position sit on the
> Wavefrontier's wide old
> mounting rail? Fairly central or is the dish aligned such that it's
> on the fringes?
Pretty central. I'll try to move it a wee bit there.>
The TV-LNBs sit sidewise of it with ample space.
Cheers,
U.