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Old 03-21-2016, 11:54 AM   #11
ke0me
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Default neighbors

Well, I haven't met too many of the neighbors, most of them work, are gone early and back late.

However, someone is always burning "incense" or something as the same smell is always in the stairwell.

This is Colorado after all, perhaps they have a "medical condition" that requires them to smoke their "medication". Sarcasm intended.

So maybe they don't really care about a little RFI.

I operate very infrequently anyway, have been too busy with studying for Extra (glad that is done now!) and part time work.

So, now maybe I can relax a bit and operate during the day when most neighbors are gone to work.
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Old 03-21-2016, 12:53 PM   #12
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If the neighbors annoy by turning up their TVs too loud, and there's a community TV antenna system, you could cure that noise with about 100w of RF into the shared coax for a little while. But probably they're all on Comcast, and certainly you wouldn't want to wipe that out. Would you?
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Old 03-21-2016, 03:48 PM   #13
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Quote:
Originally Posted by ke0me View Post
This is Colorado after all, perhaps they have a "medical condition" that requires them to smoke their "medication". Sarcasm intended.

So maybe they don't really care about a little RFI.
You think they wouldn't mind getting a little buzz on then?
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Old 03-21-2016, 06:05 PM   #14
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Default the "C"

2 things

I previously worked for "C", but not very long, we agreed to part ways amiably, they paid me money and I promised to never come back (called severance pay).

Right now, "C" is the only provider I could get for wired internet at the apartment for 6 months. The local phone company (name withheld) said they didn't have capacity at the node and didn't feel like going to any expense to serve me. They are noted for their customer service.

So for TV reception, we either go to the kids house who have the big expensive cable package, or use the amplified antenna I bought at Target to receive a few channels, all of which are at least 40-60 miles away.
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Old 03-22-2016, 11:49 AM   #15
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Grounds.. Bob heil often puts adapters on his equipment plug so he can "lift" the safety ground... George Thomas adds Grounding straps (Wide copper straps) to a common bus to earth ground.

Two differeing viewpoints... I believe in a single ground for all hardware, No loops.
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Old 03-22-2016, 10:46 PM   #16
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in traditional telecom offices, the ground system was "star", i.e. all grounds ran separately to a single point ground, and the ground field was installed and tested to meet a required standard with a ground resistance test unit by Megger (current price $843). Never did the test myself, but saw it performed several times.

However, if it was considered a "radio site", then it had a ground halo ring around the ceiling of the radio area, with multiple grounds fields outside.

If I recall, the instructions for grounding were probably about 200 pages long of how to perform all the required work.

I don't plan to go to the same extent as that (and I can't afford it either).

My feeling is that you need to be consistent in the method you apply, and test the result one change at a time (as noted earlier).
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Old 03-23-2016, 02:31 AM   #17
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Quote:
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with a ground resistance test unit by Megger
That seems strange. Every Megger I ever saw was a device for measuring very high resistances (many megohms -- thus the name Megger). I don't see what use they'd be in measuring the low resistances of ground systems.

I owned a Megger for a number of years, but a few years ago I gave it to an old friend (Jim Haynie, W5JBP, a former president of ARRL and a good guy), who probably still has it. I hadn't used it in a long time, and Jim had an immediate use for it.
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Old 03-23-2016, 09:04 AM   #18
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Default megger

For those not familiar with the brand name, here is info from the website:
megger.us

For over 100 years, Megger has been the premier provider of electric test equipment and measuring instruments for electrical power applications. The company was founded in 1889 in England as Evershed & Vignoles and over the years has been known by several names, most recently, AVO International. In 2002, the company decided to change its name to Megger, which is what many people have called it all along. Today, Megger enjoys an outstanding reputation in the areas of insulation testing, low resistance and ground resistance testing, and a wide variety of electrical contractor maintenance tools such as multimeters, portable appliance testers and clamp-on meters.

So, they cover the spectrum from low resistance to high, hence the nickname "megger" as related to the testing done.
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Old 03-23-2016, 09:49 AM   #19
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Good old ORR. Learn a new truth every other day, and in the in-between days find out that what I've known for decades ain't so.
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Old 09-14-2016, 10:57 PM   #20
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Default Noise still here

After suffering for many months trying to intermittently tackle my S9 noise problem, I'm taking a step back.

I want to try to identify what type of noise it is , where it's coming from, and do a thorough and systematic process to eliminate it.

Station- IC-7200, Alinco dmv-330 power supply, tvi filter, MFJ tuner
Each piece has a ground lead from the ground terminal to a common ground point, then that point goes on a single wire to the outside ground, a 4 ft copper ground rod.

I'm in a ground floor apartment right now, the ground run is about 10-12 ft from radio to rod.

Power supply ac cable has snap on Toroid filters installed

The noise sounds like a constant "static" at S-9 to 20 over.( with all noise filters and blankers ON)
All the time
All hf bands
Inside the rv
Outside the rv
Inside 2 different apartments
Using long wire antenna
Using Alpha vertical on tripod
Using tar heel II mounted on balcony

Random ideas ( some will seem strange) tried with no success:
Used 2 prong plug in AC outlet
Turned off cable modem, phone chargers
Turned off fluorescent and led lites
Lifted ground from ground rod, no change!

At this point I'm getting frustrated.

Would appreciate any suggestions to start identifying where noise comes from.
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