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Old 15-May-2020, 5:18 PM   #41
ckwsp101_tv
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On other forum posters not sure the repacked stations running their antennas at full FCC power levels.

I'm hoping things will settle down post lock down.
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Old 13-Jul-2020, 1:05 AM   #42
ckwsp101_tv
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Post repack report.

I speculated multi-path issues on lower channels put me on wrong side of "digital cliff".

I put up a 2nd AD 91 XG to build a horizontal array pointing at SF Sutro Tower.
Increased signal quality now allows for good reception.
Need to design mount for array.
Currently using saw horse.
Generic combiner/splitter from Home Depot.

During a high wind gust event (30+ mph) I will lose reception. Not a show stopper.

Found a useful script for my Silicondust Tuner.

https://github.com/shmick/TV_Stuff
Code:
~/Downloads/TV_Stuff-master > ./channel_scan.sh -D | tee output.txt
debug mode

Beginning scan on 10519452, tuner 1 at 07/12/20 17:46:18

Locking 10519452, tuner 1 with key 12121212

Unocking 10519452, tuner 1 with key 12121212

9 channels found
RF      Strngth dBmV    dBm     Quality SNR     Symbol  dbg     Calc_dBmV       Calc_dBm
--------------------------------------------------------------------------------------------
5       75      -15.0   -63.8   57      18.8    100     -5900   -13.2           -61.9
7       99      -0.6    -49.4   95      31.3    100     -4550   0.2             -48.5
12      100     0.0     -48.8   86      28.4    100     -4100   4.7             -44.1
13      92      -4.8    -53.5   68      22.4    100     -4900   -3.3            -52.0
27      99      -0.6    -49.4   77      25.4    100     -4650   -0.8            -49.5
28      91      -5.4    -54.1   70      23.1    100     -5100   -5.2            -54.0
29      99      -0.6    -49.4   90      29.7    100     -4650   -0.8            -49.5
33      92      -4.8    -53.5   98      32.3    100     -5100   -5.2            -54.0
34      90      -6.0    -54.8   78      25.7    100     -5225   -6.5            -55.2
 ~/Downloads/TV_Stuff-master >

Last edited by ckwsp101_tv; 13-Jul-2020 at 1:16 AM.
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Old 13-Jul-2020, 5:18 AM   #43
bobsgarage
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Posts: 292
Suggestion

I made mine from 1 1/2 Aluminized Exhaust tubing:






So, you "ganged" them with a splitter in reverse? I have been playing with a lowewr loss version, using a 1/4 wave transformer, works well.

Last edited by bobsgarage; 13-Jul-2020 at 5:44 AM.
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Old 13-Jul-2020, 2:29 PM   #44
ckwsp101_tv
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To bobsgarage,

Using 2Ghz splitter in reverse.
Higher insertion loss compared to other solutions.
No idea if lower loss combiner would improve over all viewing experience.

Looking for better location on roof for longer term mount.
Using portable mount on flat roof. May need more than 1 for arrays.

Over time obstructing trees bigger.

Marginal situation at best.

Sutro stations using auxiliary antennas work days from 7 am to 6 pm for next 5 weeks.
Stations do not lock.
Ok for now. I mostly time shift programs after 6:00 pm.


Code:
 ~/Downloads/TV_Stuff-master $ ./channel_scan.sh -D | tee output.txt
debug mode

Beginning scan on 10519452, tuner 0 at 07/13/20 09:25:00

Locking 10519452, tuner 0 with key 12121212

Unocking 10519452, tuner 0 with key 12121212

5 channels found
RF      Strngth dBmV    dBm     Quality SNR     Symbol  dbg     Calc_dBmV       Calc_dBm
--------------------------------------------------------------------------------------------
13      87      -7.8    -56.5   76      25.1    100     -5150   -5.7            -54.5
19      91      -5.4    -54.1   71      23.4    100     -5100   -5.2            -54.0
20      92      -4.8    -53.5   72      23.8    100     -5050   -4.7            -53.5
31      100     0.0     -48.8   86      28.4    100     -4575   -0.0            -48.8
36      91      -5.4    -54.1   90      29.7    100     -5200   -6.2            -55.0

Last edited by ckwsp101_tv; 13-Jul-2020 at 4:34 PM.
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