Forum: Antennas
3-Jan-2018, 8:24 PM
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Replies: 121
Views: 681,566
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Forum: Antennas
13-Mar-2015, 3:46 PM
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Replies: 121
Views: 681,566
Acme,
I have a service manual that...
Acme,
I have a service manual that covers the Alliance C225 & C225A rotor’s. As near as I can tell, the Radio Shack 15-1220 and RCA 10W707S circuitry is almost identical to these Alliance...
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Forum: Antennas
29-Jan-2015, 4:46 AM
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Replies: 121
Views: 681,566
Fascinating read –well done!
tripelo,
It’s obvious that you put a lot of work into this professional caliber test report. I wish more people would take the time to pictorially depict their test setups like you do....
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Forum: Antennas
24-Jan-2015, 6:38 PM
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Replies: 121
Views: 681,566
tripelo,
Based on manufactures specs. &...
tripelo,
Based on manufactures specs. & cost my mind tells me that my $70.00 LNA-200 should perform better than my $23.00 RCA’s but when I swap them back & forth I can’t tell any...
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Forum: Antennas
21-Sep-2014, 6:44 AM
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Replies: 121
Views: 681,566
rabbit73
Hi rabbit –long time again! ...
rabbit73
Hi rabbit –long time again!
I put the image tags ( ) on the link to my picture in post 80, expecting them to cause the picture to display in the post.
What I ended...
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Forum: Antennas
20-Sep-2014, 5:58 PM
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Replies: 121
Views: 681,566
tripelo,
As always, very interesting...
tripelo,
As always, very interesting information. I am guessing that the channel I lost by moving my UHF antenna up to 40’ is a phenomena similar to your channel 50 between 18’ & 22’....
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Forum: Antennas
14-Sep-2014, 8:49 PM
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Replies: 121
Views: 681,566
tripelo,
Interesting exercise.
...
tripelo,
Interesting exercise.
I experienced a similar phenomenon when I moved my single HDB8-X from my aluminum HAM tower leg (@ ~19’ AGL) to my TV tower mast (@ ~40’ AGL). Most...
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Forum: Antennas
9-Oct-2013, 2:46 AM
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Replies: 121
Views: 681,566
GroundUrMast,
No, I haven’t. Wedging it...
GroundUrMast,
No, I haven’t. Wedging it between the PVC mast and the plastic end cap was a convenience to keep me from climbing off the patio roof and running to the garage to get another...
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Forum: Antennas
6-Oct-2013, 11:46 PM
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Replies: 121
Views: 681,566
Satellite dish mount on tower leg
tripelo,
I finally modified the satellite dish mount that I removed from one of my rentals and attached it to the west facing leg of my aluminum tower. Attached my one remaining RCA 5-wire rotor...
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Forum: Antennas
13-Sep-2013, 4:53 PM
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Replies: 121
Views: 681,566
tripelo,
I have never heard of the DAT-75...
tripelo,
I have never heard of the DAT-75 although if the 91XG held its own or performed better I guess it doesn’t matter. I compared my new 91XG to my ~40 year old CM-4228 last year and with...
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Forum: Antennas
9-Sep-2013, 11:54 PM
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Replies: 121
Views: 681,566
LNA-200 findings
tripelo,
Here is a link to my LNA-200 findings -with pictures.
http://forum.tvfool.com/showthread.php?t=13636
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Forum: Antennas
7-Sep-2013, 2:54 PM
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Replies: 121
Views: 681,566
Tripelo,
For my first test, I...
Tripelo,
For my first test, I substituted the LNA-200’s power inserter in the garage for the RCA’s and pulled two cables off the HDB8X RCA amp and connected them to the LNA-200 to minimize...
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Forum: Antennas
7-Sep-2013, 5:42 AM
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Replies: 121
Views: 681,566
tripelo,
Two thought provoking posts in a...
tripelo,
Two thought provoking posts in a row. Today’s almost sounds like a conclusion. I’ve been looking forward to these every Friday.
I bought one of Winegards new LNA-200’s. It didn’t...
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Forum: Antennas
24-Aug-2013, 7:53 PM
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Replies: 121
Views: 681,566
tripelo,
I liked your explanation of how...
tripelo,
I liked your explanation of how uniform daytime heating can produce smaller temperature gradients, limiting how far out a refracted signal travels. I know it happens because I...
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Forum: Antennas
24-Aug-2013, 1:58 AM
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Replies: 121
Views: 681,566
tripelo,
WOW! I don’t even want to know how...
tripelo,
WOW! I don’t even want to know how long it took you to pull all this all together! I just hope you’re not going to bill me for it later?
This is great work and way beyond my ability...
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Forum: Antennas
17-Aug-2013, 9:10 PM
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Replies: 121
Views: 681,566
Antenna or Spatial Diversity
tripelo,
From the little bit of reading I’ve done on the subject, VHF is more prone to rapidly-changing multipath conditions than UHF although the new demodulators with long equalization spans...
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Forum: Antennas
16-Aug-2013, 10:58 PM
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Replies: 121
Views: 681,566
NTE/ECG U-106 Rotor
tripelo,
I’m not sure that the programmable “digital display” 3-wire rotors employ two synchronous motors (one in the control and one on the mast).
From what I’ve been able to gather,...
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Forum: Antennas
16-Aug-2013, 6:23 PM
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Replies: 121
Views: 681,566
tripelo,
That’s a lot of separation between...
tripelo,
That’s a lot of separation between your long Yagi’s. Do you think that ~1.5 wavelengths of spatial diversity is mitigating your frequency selective fading? It would certainly help...
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Forum: Antennas
9-Aug-2013, 7:33 PM
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Replies: 121
Views: 681,566
tripelo,
Another interesting read.
...
tripelo,
Another interesting read.
You may have listened to the Lone Ranger but I bet you don’t still have a Hopalong Cassidy wristwatch!
I was discouraged by ADTech’s findings with...
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Forum: Antennas
3-Aug-2013, 5:08 PM
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Replies: 121
Views: 681,566
tripelo,
This is starting to remind me of a...
tripelo,
This is starting to remind me of a time when we listened to the radio every Saturday night for the next installment of Boston Blackie or the Shadow –great stuff.
Yesterday, Time...
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Forum: Antennas
28-Jul-2013, 2:30 AM
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Replies: 121
Views: 681,566
tripelo,
Clear, concise & very interesting....
tripelo,
Clear, concise & very interesting. Your installments keep me anticipating and coming back for more. At my age, I hope you make some miraculous breakthroughs on aging but I’m not sure...
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Forum: Antennas
18-Jul-2013, 7:42 PM
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Replies: 121
Views: 681,566
Re: Long Yagi for VHF (Ch 8-11)
tripelo,
When do we get the rest of the story? Anxiously awaiting comparison results. How close were you able to come to 7 dB gain above that obtained with a pair of YA-1713 antennas with coaxial...
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Forum: Antennas
5-Jul-2013, 6:41 PM
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Replies: 121
Views: 681,566
NTE ECG U-106 Rotor vs Radio Shack 15-1220
tripelo,
No comparison. The Radio Shack 15-1220 is a 5-wire rotor that uses a balanced bridge for exact positioning. In the 50 years I’ve used it; it has never gone out of alignment. It...
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Forum: Antennas
5-Jul-2013, 3:35 AM
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Replies: 121
Views: 681,566
tripelo,
That’s interesting, I assume you...
tripelo,
That’s interesting, I assume you derived your measurement through empirical testing for channel 13? Winegard recommends optimum vertical stacking @ .94 wavelengths spacing and minimum...
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Forum: Antennas
4-Jul-2013, 2:01 AM
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Replies: 121
Views: 681,566
tripelo,
Do you remember how far apart you...
tripelo,
Do you remember how far apart you mounted the Winegard YA-1713’s in post 20?
I made a Home Depot run this afternoon & bought a 10½’ chain link fence top rail. I’ll try it in...
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