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Author Topic: QRN in/from my RV  (Read 2912 times)
VE2FK
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Posts: 15




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« on: July 27, 2011, 03:52:54 PM »

Hello Group
I have a new Copper Canyon 5th wheel and have tested my
HF radio in it. Terrible QRN up to S9 on 20m. This is with the
RV plugged to the house and the radio to the RV AC.

If I unplug the RV from the house and run an external
110VAC to the radio all is clean, no noise.

The problem is probably the Converter/Charger. Is it easy to
install filter or should I change for a PRO converter/Charger?
Any suggestion, model? Mine is rated 55AMPS.

Thanks, 73
Claude VE2FK
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K0BG
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Posts: 10248


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« Reply #1 on: July 27, 2011, 04:41:47 PM »

Without knowing what the actual brand is, I'm at a bit of a lost, but I will say this. Unless you paid for an upgrade for the inverter, no doubt it is a modified sine wave unit, and probably a cheap one at that. No matter whether it is charging, or inverting, the switching is nothing short of square wave. You can filter it, install brute force filters etc., but you won't cure the problem. In fact, even some of the square wave units are extremely RF noisy. The best place to start is to send an e-mail to K5HAB. His e-mail is on QRZ. If he doesn't know, no one will.
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VE2FK
Member

Posts: 15




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« Reply #2 on: July 27, 2011, 05:01:49 PM »

Thanks Alan.
The converter is a WFCO  # WF-8955-pec
73
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W8JX
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Posts: 13268




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« Reply #3 on: July 27, 2011, 05:29:02 PM »

This is no Inverter. It is only a load center controller and a 55 amp charger. Are you powering radio off 115 or off 12 v  batteries?
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Ham since 1969....  Old School 20wpm REAL Extra Class..
VE2FK
Member

Posts: 15




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« Reply #4 on: July 27, 2011, 05:45:34 PM »

I have no 12VDC outlet in the RV.
The radio is connected to the AC via a Astron PS.
Hearing all that noise, now I am wondering if the RV is not
making me noise in the home shack while the RV is connected to the house.

73, Claude VE2FK
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W8JX
Member

Posts: 13268




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« Reply #5 on: July 27, 2011, 05:54:56 PM »

Is there a circuit breaker that you can disable battery charger in load center with it is pulled in to external power? If so open it and see if noise goes away. It sound like you may have a switching power supply/charger that is very sloppy/noisy.
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Ham since 1969....  Old School 20wpm REAL Extra Class..
VE2FK
Member

Posts: 15




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« Reply #6 on: July 27, 2011, 06:00:34 PM »

I will have a look at it in the morning, there are 5 or 6 bkrs.
Will probably do the IOTA this weekend unpluged hi.
Thanks.
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K0BG
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« Reply #7 on: July 28, 2011, 06:35:27 AM »

That unit is not an inverter, it is a power distribution panel with a battery charger built in. From the brochure on their web site, it is indeed digitally based. Considering it sell for under $200 delivered, I'm not too surprised at the RF noise level. Really good ones, with decent RFI suppression cost upwards of $1,000.
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W8JX
Member

Posts: 13268




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« Reply #8 on: July 28, 2011, 08:23:39 AM »

That unit is not an inverter, it is a power distribution panel with a battery charger built in.

I already mentioned that well up thread.......
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Ham since 1969....  Old School 20wpm REAL Extra Class..
VE2FK
Member

Posts: 15




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« Reply #9 on: July 28, 2011, 08:44:05 AM »

Thanks guys. Understand my problem.
So, until I find a deal on a good unit, will run UNPLUGED
when I want to run the radio. The old RV was not that bad
with same kind of Dist/Charger.

73, Claude VE2FK
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KD4DPB
Member

Posts: 4




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« Reply #10 on: July 30, 2011, 05:23:46 PM »

Maybe bad power plugs mine melted i think it was a loose connection and our 100 deg heat here
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VE2FK
Member

Posts: 15




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« Reply #11 on: July 30, 2011, 06:02:43 PM »

Thanks, will have a look.
Today even noticed that noise is heard in the shack while the RV
is connected to the house.

73, Claude VE2FK
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