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Search: Posts Made By: dlwtrunked
Forum: Splitters, Filters and Multicouplers Today, 7:02 PM
Replies: 5
Views: 120
Posted By dlwtrunked
Strong FM broadcasts Will generate intermod on...

Strong FM broadcasts Will generate intermod on lots of frequencies and de-sense receivers far away from the FM broadcast band. They are most often used for that no to avoid interference on the FM...
Forum: Washington DC Radio Discussion Forum Yesterday, 4:57 PM
Replies: 9
Views: 676
Posted By dlwtrunked
The Mt. Weather P25 Phase II trunk system does...

The Mt. Weather P25 Phase II trunk system does use the old 172.6625 as one of its frequencies.
It is on the east side of the mountain. The complete system is:
172.6625 (162.1250 input)
173.1750...
Forum: Florida Radio Discussion Forum 10-15-2018, 12:36 PM
Replies: 6
Views: 468
Posted By dlwtrunked
I suspect I mis-typed 451.7375 as 451.3375 and...

I suspect I mis-typed 451.7375 as 451.3375 and came up with the last license. Sorry about that.
Forum: Florida Radio Discussion Forum 10-12-2018, 2:29 PM
Replies: 6
Views: 468
Posted By dlwtrunked
Frequency is licensed to Memorial Hospital West...

Frequency is licensed to Memorial Hospital West Volusia DBA Florida.
Forum: Texas Radio Discussion Forum 10-09-2018, 6:01 PM
Replies: 12
Views: 717
Posted By dlwtrunked
Almost certainly a line of sight problem. The...

Almost certainly a line of sight problem. The aircraft is sitting out there in the open with the "tower" antenna somewhere else (not likely atop the tower) and surrounded by who knows what. Be...
Forum: Texas Radio Discussion Forum 10-09-2018, 5:43 PM
Replies: 12
Views: 717
Posted By dlwtrunked
And I am sure you meant to add-get it up in the...

And I am sure you meant to add-get it up in the air--like on the roof.
Forum: HF/MW/LW General Discussion 10-07-2018, 7:55 AM
Replies: 26
Views: 907
Posted By dlwtrunked
When LED bulbs first were coming out, I wrote an...

When LED bulbs first were coming out, I wrote an article where I carefully measured the interference produced by them and submitted it to the ARRL for possible publication in QST. The ARRL's...
Forum: Military Monitoring Forum 10-03-2018, 6:13 AM
Replies: 11
Views: 2,457
Posted By dlwtrunked
I would partially challenge that. They do not...

I would partially challenge that. They do not really change frequency any more often than the FAA does. Yes they change but most stay for many years. And the DOD flight supplements were public...
Forum: General Scanning Discussion 09-26-2018, 10:52 PM
Replies: 56
Views: 1,977
Posted By dlwtrunked
At 100 GHz three things become serious problems...

At 100 GHz three things become serious problems that have to be addressed:
1. Bends in wire cause and inductance which acts like a resistance to an RF frequency and that increases with the...
Forum: Ohio Radio Discussion Forum 09-26-2018, 7:48 AM
Replies: 13
Views: 1,571
Posted By dlwtrunked
Hard to sort through the FCC files to find a...

Hard to sort through the FCC files to find a complete list (except digital TV links) of licenses for Goodyear "blimp" operations . I missed the last license before for some reason and that explains...
Forum: Amateur Radio Antennas 09-24-2018, 7:34 AM
Replies: 9
Views: 686
Posted By dlwtrunked
"In the clear", on what basis do you mean that? ...

"In the clear", on what basis do you mean that? (It is not true if you really mean clear path between.)
Forum: Amateur Radio Antennas 09-24-2018, 7:29 AM
Replies: 9
Views: 686
Posted By dlwtrunked
1.22*sqrt(50)=8.6 miles. Check your calculation....

1.22*sqrt(50)=8.6 miles. Check your calculation.
https://en.wikipedia.org/wiki/Horizon
Forum: Amateur Radio Antennas 09-24-2018, 7:24 AM
Replies: 9
Views: 686
Posted By dlwtrunked
Of course, by "flat", you mean no rise or...

Of course, by "flat", you mean no rise or obstructions above round earth, like the calm ocean--but I will use the term "flat" also, like you, lacking a better term (perhaps "round earth" would be).
...
Forum: Virginia Radio Discussion Forum 09-23-2018, 8:32 AM
Replies: 6
Views: 440
Posted By dlwtrunked
22A is for broadcasts only and definitely the...

22A is for broadcasts only and definitely the wrong frequency for your interest. I would try
FM: 156.8, 157.15, 157.075, 157.125, 157.175
P25: 162.05, 162.325, 165.3125
AM:
237.900 - Secondary...
Forum: Splitters, Filters and Multicouplers 09-23-2018, 7:06 AM
Replies: 13
Views: 595
Posted By dlwtrunked
Be sure you understand that the total loss for...

Be sure you understand that the total loss for the Mini-Circuits is 3.3 to 4.1 dB (not just the small insertion loss). This is about the same as a cable TV device. And it is passive. The...
Forum: Aircraft Monitoring Forum 09-16-2018, 8:14 PM
Replies: 12
Views: 3,423
Posted By dlwtrunked
A link to the page with the maps is ...

A link to the page with the maps is
https://www.rockwellcollins.com/Products-and-Services/Commercial-Aviation/Connectivity-and-Network-Services/Flight-deck-solutions/ARINC-Voice-Service.aspx
Forum: Scanner / Receiver Antennas 09-16-2018, 5:10 PM
Replies: 12
Views: 764
Posted By dlwtrunked
I tried the Rerret base one about 1990. It...

I tried the Rerret base one about 1990. It rattled inside and my discone did better. I thought there was something wrong with it. Talking with the company back then was no help. I took it apart...
Forum: HF/MW/LW General Discussion 09-07-2018, 5:02 PM
Replies: 15
Views: 676
Posted By dlwtrunked
Still operating. And NLK Jim Creek WA on 25.2...

Still operating. And NLK Jim Creek WA on 25.2 kHz and LaMoure ND on 24.8 kHz. As well as others else where in the world. Note that it is "kHz" not "Khz". "Hz" has the H capitalized and see for...
Forum: Marine Monitoring Forum 09-05-2018, 7:07 AM
Replies: 11
Views: 2,117
Posted By dlwtrunked
You are proabably not hearing the Boston...

You are proabably not hearing the Boston transmitter. They have remote transceivers at Orleans and Truro which are much closer (and at Marshfield, Cohasset, Gloucester, Signal Hill, and of course at...
Forum: HF/MW/LW Equipment 09-04-2018, 4:33 PM
Replies: 15
Views: 1,040
Posted By dlwtrunked
I have an ICOM R9500 which might qualify. But I...

I have an ICOM R9500 which might qualify. But I would probably trade it for two R8600s. There is only so much one can do to make a radio" better".
Forum: Amateur Radio General Discussion 08-29-2018, 5:19 PM
Replies: 86
Views: 4,012
Posted By dlwtrunked
Not a single non-amateur has ever noted my...

Not a single non-amateur has ever noted my plate--only other amateurs; it lets other amateurs know to call me perhaps on 146.52. In Virginia, an amateur can get his call on his plate for $1--it is...
Forum: General Scanning Discussion 08-12-2018, 7:23 AM
Replies: 11
Views: 2,335
Posted By dlwtrunked
I have never had a problem either but recommend...

I have never had a problem either but recommend that one be able to demonstrate it is a radio receiver by receiving NOAA weather if needed.
Forum: Whistler Scanners 08-06-2018, 7:01 PM
Replies: 17
Views: 1,432
Posted By dlwtrunked
In the plots I just looked at, the RTL-SDR one...

In the plots I just looked at, the RTL-SDR one has a loss at 118 MHz looks more like 6 not 1 dB. The Mini-Circuits one is 1 dB or so at 118 MHz but 5 times the cost of the RTL-SDR. that being said,...
Forum: Whistler Scanners 08-06-2018, 8:56 AM
Replies: 17
Views: 1,432
Posted By dlwtrunked
I ran through some values and it is not practical...

I ran through some values and it is not practical which is certainly why no body does that.
Forum: Whistler Scanners 08-06-2018, 8:50 AM
Replies: 17
Views: 1,432
Posted By dlwtrunked
Good ones do not have impact on part of the air...

Good ones do not have impact on part of the air band that count (generally one only cares about above 118 MHz unless one is withing range of a VOR with voice and sometimes listens to the rare voice...
Showing results 1 to 25 of 250

 

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