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Re: [RFI] RFI from variable speed swimming pool pumps

To: Jim <jimk8mr@aol.com>
Subject: Re: [RFI] RFI from variable speed swimming pool pumps
From: James Jordan <k4qpl2@gmail.com>
Date: Tue, 3 Jul 2018 07:42:49 -0400
List-post: <mailto:rfi@contesting.com>
Yes, very much so. Only recently has the Canadian owned utility company 
monopoly even allowed homeowners to use solar to reduce demand on their 
inefficient diesel powered generating system and previously had no cogeneration 
buy-back program. 
I’m looking into solar as our next project down there but I’m even more 
concerned about the RFI potential than the pool pump. “Properly designed 
(RFI-wise)” is the key. 
Stay tuned!!
73,
Jim K4QPL VP5M 

Sent from my iPhone

> On Jul 2, 2018, at 9:06 PM, Jim <jimk8mr@aol.com> wrote:
> 
> At $.48/kwh does a properly designed (RFI-wise) solar system become a good 
> economic idea?
> 
> 
> 73  -   Jim  K8MR
> 
> 
> 
>> On Jul 2, 2018, at 1:54 PM, James Jordan <k4qpl2@gmail.com> wrote:
>> 
>> Good question. Thanks but the power situation in Turks & Caicos is very 
>> different from USA. Electricity is about $.48 PER KILOWATT HOUR! What’s 
>> yours? Pool alone presently costs almost $300/month for power. A two speed 
>> doesn’t have enough flexibility to optimize energy usage while providing 
>> adequate circulation and filtering. The new VS drives are also inherently 
>> more efficient so I’ll just have to deal with any RFI that results. Most of 
>> our renters are not hams in any event and if push comes to shove we’ll 
>> switch off or to the backup fixed speed pump during a contest etc. Hopefully 
>> line filters and ferrites will keep things manageable. 
>> 73,
>> Jim K4QPL VP5M 
>> 
>> Sent from my iPhone
>> 
>>> On Jul 2, 2018, at 12:53 PM, Jim Brown <jim@audiosystemsgroup.com> wrote:
>>> 
>>> Why use variable speed controller at all?  Most systems that use motor 
>>> controllers have 2-speed controllers as "standard equipment" and offer 
>>> variable speed as an upgrade.  I suggest that you try to avoid variable 
>>> speed.
>>> 
>>> 73, Jim K9YC
>>> 
>>>> On 7/1/2018 11:25 AM, James Jordan wrote:
>>>> Other comments or suggestions?
>>> 
>>> 
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