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Search: Posts Made By: RFI-EMI-GUY
Forum: GMRS / FRS Today, 12:54 AM
Replies: 5
Views: 134
Posted By RFI-EMI-GUY
During Hurricane Irma I made the mistake of...

During Hurricane Irma I made the mistake of suggesting to my neighbors via NextDoor, that they should dust off their FRS radios and set to channel 1 tone zero so that should the worst happen we can...
Forum: GMRS / FRS Today, 12:11 AM
Replies: 5
Views: 134
Posted By RFI-EMI-GUY
Great, now there will be more racket on the...

Great, now there will be more racket on the shared channels. Bad enough the Rodger beeps.

The ficticious data range is less, because typically data gets more easily impaired than voice.


You...
Forum: Uniden Tech Support Yesterday, 8:19 PM
Replies: 6
Views: 346
Posted By RFI-EMI-GUY
Tune another frequency with a strong signal and...

Tune another frequency with a strong signal and look for a spur 50 KHz above or below. If you find them, the receiver may have a spurious RX problem.

See if you can RX the spur with another RX....
Forum: Uniden Tech Support Yesterday, 10:55 AM
Replies: 6
Views: 346
Posted By RFI-EMI-GUY
If you tune in another strong signal do you get...

If you tune in another strong signal do you get an image 50 KHz away?

Sent from my SM-T350 using Tapatalk
Forum: Florida Radio Discussion Forum Yesterday, 2:37 AM
Replies: 5
Views: 312
Posted By RFI-EMI-GUY
Trump actually sued PBIA a few years back...

Trump actually sued PBIA a few years back claiming they were deliberately flying planes over that dump Mar a Lago and causing the termite infested walls to crack. Now he is flying air force one over...
Forum: Budget and Entry Level Transceivers Yesterday, 2:31 AM
Replies: 1
Views: 260
Posted By RFI-EMI-GUY
I can't figure out if they have even shipped any,...

I can't figure out if they have even shipped any, or if it will be a rectangular package like the FCC sample or octangular like the ads. I like rectangular. I do like that it uses WIFI to link the...
Forum: Uniden Tech Support Yesterday, 2:14 AM
Replies: 6
Views: 346
Posted By RFI-EMI-GUY
Does the image frequency sound louder? Sent...

Does the image frequency sound louder?

Sent from my SM-T350 using Tapatalk
Forum: Industry Discussion 11-19-2018, 11:59 PM
Replies: 8
Views: 370
Posted By RFI-EMI-GUY
Heck yeah, Motorola has owned Vertex for a while.

Heck yeah, Motorola has owned Vertex for a while.
Forum: Industry Discussion 11-19-2018, 10:05 PM
Replies: 8
Views: 370
Posted By RFI-EMI-GUY
How cold was it? Were both radios turned...

How cold was it?

Were both radios turned off at the time? Were they stored in exactly same location in the vehicle? Was the XTS in a charger or vehicular adaptor?

The cold really does slow...
Forum: Amateur Radio Antennas 11-19-2018, 6:09 PM
Replies: 23
Views: 900
Posted By RFI-EMI-GUY
Safety? Not safety, clearly that thing would have...

Safety? Not safety, clearly that thing would have to extend into the next county to be "safe".
Forum: General Scanning Discussion 11-19-2018, 12:16 AM
Replies: 11
Views: 428
Posted By RFI-EMI-GUY
You can get a 16 or 32 channel Maxtrac and use...

You can get a 16 or 32 channel Maxtrac and use the DOS RSS software to program it in the field.

Bear in mind that your railroads might be going to narrow band 12.5 KHz channels and an older...
Forum: Amateur Radio Antennas 11-19-2018, 12:03 AM
Replies: 23
Views: 900
Posted By RFI-EMI-GUY
You are still conveying "information" in the...

You are still conveying "information" in the variation of signal strength.
Forum: General Scanning Discussion 11-18-2018, 10:46 PM
Replies: 11
Views: 428
Posted By RFI-EMI-GUY
Most scanners, have very wide front end filtering...

Most scanners, have very wide front end filtering on the receiver. Some more expensive receivers like ICOM ICR7000 and ICR9000 have varactor tuned filtering.

You can improve a cheap scanner by...
Forum: HF/MW/LW General Discussion 11-17-2018, 5:11 PM
Replies: 10
Views: 509
Posted By RFI-EMI-GUY
I hope they have researched long delayed echoes!...

I hope they have researched long delayed echoes! It would be a shame if they churn a stock up and then buy it over and over again at the inflated price, on a delayed echoe!



Sent from my...
Forum: Amateur Radio Antennas 11-17-2018, 3:29 PM
Replies: 23
Views: 900
Posted By RFI-EMI-GUY
I wasn't thinking in terms of waveguide with...

I wasn't thinking in terms of waveguide with respect to E and H field but the same applies.

Where I get mixed up is with a dipole in free space. There is all this conjecture about making signal...
Forum: News and Events 11-17-2018, 3:23 PM
Replies: 6
Views: 286
Posted By RFI-EMI-GUY
It seems obvious and like a stretch. For the...

It seems obvious and like a stretch. For the standard to have interoperability, the air interface must be common. You can't expect for each vendor to come up with a novel way to knock on the door and...
Forum: News and Events 11-16-2018, 8:07 PM
Replies: 6
Views: 286
Posted By RFI-EMI-GUY
This is interesting, I had not given any thought...

This is interesting, I had not given any thought as to how a subscriber initiates a call on a repeater without the repeater first providing a time slot.

Does ETSI describe a preffered way to do...
Forum: HF/MW/LW General Discussion 11-16-2018, 8:24 AM
Replies: 10
Views: 509
Posted By RFI-EMI-GUY
The internet is not secure at all and is the...

The internet is not secure at all and is the slowest form of propagation. Airwaves go through free space and travel at the speed of light through the atmosphere.

While fiber optic and copper...
Forum: Radio Direction Finding Forum 11-16-2018, 1:34 AM
Replies: 17
Views: 7,778
Posted By RFI-EMI-GUY
A shameless plug from our sponsor: Tracking...

A shameless plug from our sponsor:

Tracking Receiver (433-434 MHz) TELEVILT TVP POSITIONING RX9700E LN! Bumper Beep
...
Forum: Amateur Radio Antennas 11-15-2018, 9:36 PM
Replies: 23
Views: 900
Posted By RFI-EMI-GUY
What amazes me is how DSP can down convert,...

What amazes me is how DSP can down convert, filter the channel BW, demodulate and also modulate using mathematics. When you think about it it makes sense, but that it all happens on a slab of silicon...
Forum: Amateur Radio Antennas 11-15-2018, 7:30 PM
Replies: 23
Views: 900
Posted By RFI-EMI-GUY
Here is one, how do the E field and H field get...

Here is one, how do the E field and H field get glued back together after they reach the far field region?

Sent from my SM-T350 using Tapatalk
Forum: ICOM Receivers 11-15-2018, 7:25 PM
Replies: 6
Views: 368
Posted By RFI-EMI-GUY
The relay is switching DC like the remote start...

The relay is switching DC like the remote start stop switch of an old cassette recorder. For whatever reason ICOM had no provision to disable the relay in that model and it clicks away. They could...
Forum: ICOM Receivers 11-15-2018, 9:32 AM
Replies: 6
Views: 368
Posted By RFI-EMI-GUY
It appears it would be very easy to remove the...

It appears it would be very easy to remove the relay, replace it with an optoisolator and dropping resistor for the LED. This could be soldered on a square of perf board and fit exactly in place of...
Forum: Amateur Radio Equipment 11-14-2018, 8:34 PM
Replies: 6
Views: 374
Posted By RFI-EMI-GUY
Are you using a discriminator tap from each radio...

Are you using a discriminator tap from each radio as input to the ID-O-MATIC boards or the speaker output from the radios?

A schematic would be helpful.

You might have better luck summing the...
Forum: Amateur Radio Equipment 11-14-2018, 3:40 PM
Replies: 6
Views: 374
Posted By RFI-EMI-GUY
Have you checked this by turning off the...

Have you checked this by turning off the transmitters and listening to the receivers alone? In other words do both receivers work properly when both are on and the TX radios are off?

If so:

1)...
Showing results 1 to 25 of 250

 

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