[RFI] RFI Digest, Vol 83, Issue 12

[W. Harris]

Reminds me of the story of the couple that got the controls on their dual control electric blanked crossed. In the night he got hot so he turned his control down, his wife kept getting colder so she turned her control up. When they were found the next day, she had frozen to death and he died of heat stroke.

Bill H.
K5MIL

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> Message: 2
> Date: Wed, 18 Nov 2009 08:03:26 -0800
> From: Joe 
> Subject: Re: [RFI] Electric blankets
> To: "RFI" 
> Message-ID: <00bf01ca6868$ab8ccf60$cd01a8c0 at main>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=original
>
> I am sorry....I know this is a serious subject, but the humor in 40 meters
> affecting an electric blanket's control is just too good to ignore.
>
> Nothing said about turning the control on, but..what if.....Early, one very
> chilly morning, 40 meters is open to where-ever...you fire up the amplifier
> and swing the beam xxxward. You don't think about it pointing over your
> nearest neighbor's house. THERE..weak, but from "I gotta have it land" so
> you give it all you've got to make that contact, when suddenly, you hear
> from your neighbor's house..."HEY!! Who in the heck turned up my electric
> blanket control??? It's melting my pj's!" Or, "HEY! Who in the heck
> turned off my electric blanket?? I'm freezing in here!" (Needless to say,
> those would NOT be the exact words used, but I can't say them on the air, so
> why should I say them here??!!)
>
> My apology to the group...in my mind, it was just too funny to pass
> up......Humor in the morning isn't bad, is it??
>
> Now, back to the serious business of interference.....
>
> Joe Wolfe
> WA6RKN
> Reno, Nevada
>
> ----- Original Message -----
> From: "Dale Frederick" 
> Subject: [RFI] Electric blankets
>
>
>> So, has anyone taken on the issue of electric blankets?
>>
>> I have encountered one that shuts off when exposed to 40M RF, and another
>> that goes into and error mode, when not on.
>
>
>
>
> ------------------------------
>
> Message: 3
> Date: Wed, 18 Nov 2009 11:27:58 -0500
> From: Martin Ewing 
> Subject: Re: [RFI] Electric blankets
> Cc: RFI Reflector 
> Message-ID:
> 
> Content-Type: text/plain; charset=ISO-8859-1
>
> I don't know what's to "take on"... It's the common problem of too
> much "smart" control with too little RFI suppression. The same thing
> applies to my little world globe touch-sensitive lamp in the kitchen.
> It lights up in sympathy with my QSOs. Admittedly, that's less
> dramatic than freezing or cooking your sleeping family and/or
> neighbors.
>
> The only cure is reducing the RF input to said devices. Either move
> your antenna and/or feedlines away from the device, or apply filtering
> to the various inputs and outputs. (Or QRP or QSY to a less sensitive
> frequency.) Electric blanket controls have two or three attached
> wires, but you could start with the power cord. Snap on devices are
> easiest, but least effective. Eight or nine turns on a type 43 or 77
> core is much better, but may require surgery.
>
> I wouldn't want to be the one to deal with upset neighbors on this
> issue! Maybe you could quietly tell them about the studies that say
> electric blankets cause brain cancer... But don't let them see the
> ones that say the same thing about ham radio. ;-)
>
> 73 Martin AA6E
>
> On Wed, Nov 18, 2009 at 10:48 AM, Dale Frederick  wrote:
>> So, has anyone taken on the issue of electric blankets?
>>
>> I have encountered one that shuts off when exposed to 40M RF, and another
>> that goes into and error mode, when not on.
>>
>> dale
>> KB5IY
>> _______________________________________________
>> RFI mailing list
>> RFI at contesting.com
>> http://lists.contesting.com/mailman/listinfo/rfi
>>
>
>
>
> --
> Dr. Martin S. Ewing, AA6E
> Member IEEE, URSI, AAS, ARRL
> Branford, Connecticut
>
>
> ------------------------------
>
> Message: 4
> Date: Wed, 18 Nov 2009 09:11:01 -0800
> From: "Jim Brown" 
> Subject: Re: [RFI] Electric blankets
> To: "RFI List" 
> Message-ID: <20091118171057.1007C58460 at gw1.nlenet.net>
> Content-Type: text/plain; charset="us-ascii"
>
> On Wed, 18 Nov 2009 11:27:58 -0500, Martin Ewing wrote:
>
>>Eight or nine turns on a type 43 or 77
>>core is much better, but may require surgery.
>
> See measured data in my RFI tutorial for multi-turn chokes wound on
> #31, #43, #61, #77, and #78 toroids, and on a #31 1-inch i.d. clamp-
> on. For 40M, #31 or #43 are the weapons of choice.
>
> http://audiosystemsgroup.com/RFI-Ham.pdf
>
> 73,
>
> Jim Brown K9YC
>
>
>
>
> ------------------------------
>
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>
>
> End of RFI Digest, Vol 83, Issue 12
> ***********************************