Look at the pole feeding the chicken house. How many transformers are hanging on that pole? If one transformer, it's single phase. If three transformers, it's three phase.
-Charles, K5CS
One other possibility.
The info that I'm going by:
1. It is not normal hash, but a hum.
2. It started with the additon of a chicken house.
My question.
Is the power feedin the chicken house single phase or 3 phase. If it is single phase, does it have a single phase to 3 phase converter at the chicken house. The 3 phase converter would probably be owned by the customer. I ran this through AI and this is what I see! Check out the info on harmonic distortion.
Single-phase to 3-phase converters often cause issues on utility lines due to high inrush currents, voltage imbalance, and harmonic distortion. These issues lead to overheating motors, tripped breakers, and poor performance, especially when using undersized converters or when the converter is loaded with uneven, single-phase loads.Common Issues and Causes
- Voltage Imbalance: If the output voltage is not balanced (not equal in all three phases), it causes motor heating and reduced motor life, according to www.powerlinephaseconverter.com this FAQs page. This is frequently caused by using an undersized converter or adding too many single-phase loads to the converter’s output.
- Harmonic Distortion: Converters can introduce harmonics onto the single-phase utility line, affecting other devices and causing power quality issues, as described in www.geya.net this article.
On Mon, 23 Mar, 2026 at 3:46 PM, Jussi Eloranta via ADXA <[email protected]> wrote:To: 'adxa'
Hi,
Just recorded the 160m noise on the panadapter. I was expecting it to be
wide and all over the place. However, see attached. Bog is beverage on
ground (wideband resonant) and invL is my inverted L (narrow resonant;
SWR only OK at the bottom of 160m). You can see that both spectra are
surprisingly narrow. They have center around 1.840 MHz (FT8 160m
frequency, of course!) and extend to the sides by about 100 KHz. I was
initially looking at this with my inv L and thought that, OK, that must
be just the antenna response I am seeing. But now that I see the same
thing with the BOG, I am not so sure what to make of this. If I scan
more to the AM band, it seems that it is clear over there but then going
further down in frequency I find another similar spot that is noisy.
So, is this power pole noise after all? And if not, what on earth could
it be? It has the characteristic raspy tone with multiples of 60 Hz in
it. On AM it sounds like the typical power line hum. All that fit power
pole noise but the spectrum does not - I think. Furthermore, I do not
hear this noise at all on 80m. This is not from my shack as I have
turned off power and used the radio on battery power. I do hear
something weak on 6m from far away but I have no idea if this is the
same thing as what I see on 160m.
Jussi (aa6kj)
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