I used to have a similar problem when I lived in a townhouse. When I ran
as little as 5 watts on 40m all the furnaces on my street would go on. Not
cool especially during the summer. One of my neighbors was an old college
class mate and one day he told me that he was working in his basement and he
could hear me talking whne he was over by his furnace. It turns out that
there was a relay in the system that had a diode in the activation circuit
which was picking up the RF from my antenna and activating the system. I
called the manufacturer, they located one of thier employees that was a ham
and installed on of the units in his house. He found the defective circuit
and the company issues a free of charge repair bulletin. That was 34 year
ago.I don't know if manufacturers are up to the task these days but it might
be worth a try to call them and discuss the problem.
Good Luck,
dave
wa3gin
----- Original Message -----
From: "Christian Buenger" <c.buenger@gmx.ch>
To: <k1ttt@arrl.net>
Cc: "Rfi" <rfi@contesting.com>
Sent: Sunday, November 19, 2006 7:48 AM
Subject: Re: [RFI] new rfi source in house!
> Hi David,
>
> probably they use a bus system on an unshielded cable. My heating
> system is similar. Although it does not generate QRM sometimes the
> heating "stalls" after transmitting on HF and you have to power it
> down to reset it :(
>
> If you can, you might want to try shielded cable to avoid radiation
> from the cable itself.
>
> 73
> Christian, DL6KAC
>
> On 11/19/06, David Robbins K1TTT <k1ttt@arrl.net> wrote:
>> Argh... this should have been safe, I thought. Friday I had a Rinnai
>> tankless hot water heater installed, now I have pulsing qrm on several sw
>> bands. They seem to have nicely avoided the 6 hf contest bands at least.
>> Anyone know what these are doing? The manual doesn't say a thing about
>> how
>> they are controlled other than to hook up the 2 wire cable from the
>> remote
>> controller to the heater.
>>
>>
>> David Robbins K1TTT
>> e-mail: mailto:k1ttt@arrl.net
>> web: http://www.k1ttt.net
>> AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
>>
>>
>>
>> _______________________________________________
>> RFI mailing list
>> RFI@contesting.com
>> http://lists.contesting.com/mailman/listinfo/rfi
>>
>>
>
>
> --
> mailto:c.buenger@gmx.ch
> fax2mail: +49 25 61 / 9 59 42 99 20
> _______________________________________________
> RFI mailing list
> RFI@contesting.com
> http://lists.contesting.com/mailman/listinfo/rfi
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