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And the reason why car antenna cables are not 50 ohms... Centre conductor is very thin to keep impedance high (and parallel capacitances low) DG9BFC sigi Am 07.09.2023 20:14 schrieb W0LEV

Car radio antennas are a 'high impedance' design, and their co-ax cable is also Hi-Z. While 'any antenna' will radiate, some do it FAR better than others. To more directly answer your original

The simple answer is "you don't". As pointed out in another email, the AM car antennas are a hi-Z capacitive probe free space. They are highly capacitive, and measurement in a 50-ohm system, the

Have you tried a known good USB cable? The cables that come with the units usually are designed for charging, not data transfer. Dave - W?LEV wrote: -- Dave - W?LEV

If I have a bad cable, I cut it in half and discard it. This has also been the practice at a number of places I've worked, now retired (thank heaven!). Dave - W?LEV [email protected]> wrote:

*Finally success!* Last night I was putzing, once again, with the NanoVNA H4 that was not measuring SWR but would calibrate. By swapping out connectors I found a female sma to so239 connector that was

Don, excellent pro tip! I've been bitten by forgetting I had a bad cable and didn't properly discard it. Thanks! Allen KI4QCK

Understand that except for very high-end specialized network analyzer cables, the flexible cables we buy have to be considered consumables, as their attachment points and wires will sooner or later

This is what I've come to believe. The 'noise' of the various electronics within the truck I believe is the problem. After I came to that conclusion I took the problem to the local uni and was told my

I meant to say traditional AM broadcast band car radio antenna. On FM broadcast band a whip antenna center mounted on a car roof can be a pretty good 1/4 wavelength monopole. The broad consumer

Yes. There is a benefit to filtering in the physical world, such as a tunable pre-selector or fixed band pass filter to reduce incoming RF that is not within the frequencies of interest. I agree that

Hi Stan I have tried everything possible to get this unit to connect to a PC. I did have one computer which I had not connected it to and it wouldn't work with that one either. I can only conclude

Have you tried to add a low pas or notch filter?

I live in North Central Florida. You can hear the traffic lights change on AM car radios, ell over a mile from those? crap LED traffic lights. The olny time I ge decent AM reception at home is after

Old car radios had a tuned RF input, and an RF amplifier. I't's hard to beat a '63 to late '70's? Delco AM car radio. They used a variable inductor tuning system, with very good tracking between

I recently ran across: "RTL-SDR Blog SMA Male to ..." on Amazon for $26.95. Ten different jumper cables with SMA Male on one end and an assortment of popular connector types, both Male and Female on

An AM radio antenna on a car is actually a voltage probe. I used to talk with Delco car radio engineers many decades ago at their annual schoolswhere they indroduced new designs to techs who did

You can get cheap cables from Ali or Ebay, just buy the semirigid ones and you should be fine. Hard to mess those up. I got a few cables like this one https://s.click.aliexpress.com/e/_DepHX0j and had

Pasternack made a high quality product when the company I worked for used them about 20 years ago. Good chance it is still a high quality product, at a higher price. Recently I have ordered components

Hello Stan, What model, manufacurer and from what supplier did you obtain the quality sma coax cables? Thanks. Al