[OFARC] Club project

[Mike Perkins]

I'm forwarding this to the list, ofarc at mailman.qth.net

As for myself, I don't think I'll be able to attend. I have a family 
obligation that day.

Mike, KD5MVL


On 7/16/2014 10:31 AM, Ralph (home) wrote:
> I’m game
> I can be at his house at 0800
> *From:* Terry Moon <mailto:w5pcj at hotmail.com>
> *Sent:* Wednesday, July 16, 2014 11:18
> *To:* Ralph (home) <mailto:ke5hdf at sbcglobal.net> ; President at ofarc.org 
> <mailto:President at ofarc.org>
> *Cc:* mike perkins <mailto:mfperkins at comcast.net>
> *Subject:* Club project
>
> As some of you may know, Jim has a tower at his house on candlelight 
> and ella that needs to be moved to the lodge. It's already on the 
> ground and Jim will be getting a trailer to move it with but we need a 
> minimum of 4 people to help load and unload. I've already volunteered 
> to help but will need more people to do this. It was suggested last 
> night on the net to gather at his house on the 26th which is the 
> morning of our club meeting at 9 load it up and unload at the lodge or 
> meet at the lodge first at 9 then go over to his house. This tower 
> will be eventually erected at the lodge for the club station. Any 
> input is greatly appreciated.
>
> Sent from my W5PCJ cell phone
>
> ----- Reply message -----
> From: "Ralph (home)" <ke5hdf at sbcglobal.net>
> To: <President at ofarc.org>
> Cc: "Terry Moon" <w5pcj at hotmail.com>, "mike perkins" 
> <mfperkins at comcast.net>
> Subject: band pass filters
> Date: Mon, Jul 14, 2014 10:01 PM
>
>
> I found a place where I can buy used computer power supplies
> good ones are $15;  bad ones are $1
> the cases come open very easily.
> the one I opened has lots of small capacitors, 4 nice toroids and 
> other pieces
> I checked against coil sizes given in the write up ... plenty of room
> perhaps we can take a few minutes at the July meeting to describe the 
> filters and get a read on if the club wants to build them.
> Ralph
> KE5HDF
> *From:* Ralph (home) <mailto:ke5hdf at sbcglobal.net>
> *Sent:* Friday, July 04, 2014 22:40
> *To:* President at ofarc.org <mailto:President at ofarc.org>
> *Cc:* Terry Moon <mailto:w5pcj at hotmail.com>
> *Subject:* band pass filters
> Terry and I have discussed the need for band pass filters at next 
> year’s field day.
> I was looking at a band pass filter design that uses quadfilar toroids 
> then Mike sent me the link below
> the multi toroid design requires each inductor to be tuned in 3-4 
> steps as you assemble the entire filter.
> the design from N1NC uses coils wound on PVC and suggests using the 
> cases from discarded computer power supplies,
> Rusty ... I suggest we have 3 meetings over the next year dedicated to 
> building a set of filters for the club to use at Field Day.
> (filters for 10, 15, 20, 40, and 80 meters)
> 1 – describe the filters and discuss collecting the parts
> 2 – some basic assembly and mutual aid
> 3 – tuning and testing each filter
> I will ask the IT group at my office and the pc repair shops near my 
> house about old power supplies and see what is available.
> Let me know what  you think ...
>
> Ralph
> KE5HDF
> *From:* Mike Perkins <mailto:mfperkins at comcast.net>
> *Sent:* Friday, July 04, 2014 19:26
> *To:* ofarc at mailman.qth.net <mailto:ofarc at mailman.qth.net>
> *Subject:* Re: [OFARC] winding toroids
> Lots of folks grip the core in a vise for winding, but there is a risk 
> that you could over-tighten and break the core. Here's a method that 
> was mentioned in an ARRL letter some time back, that essentially 
> eliminates that risk. I've tried it, and it works.
> https://www.youtube.com/watch?v=GT44U10WqRA
>
> But wait, here's an interesting project, and none of those pesky 
> toroids to wind. http://www.n1nc.org/Filters/
>
> Mike, KD5MVL
>
> ------------------------------------------------------------------------
>
> On 7/3/2014 11:33 PM, Ralph wrote:
>> A few of us that worked field day have decided to start building band 
>> pass filters.
>> the designs I have found all use biliar or quadfilar wound toroids.
>> I will need someone to show me  how to wind toroids
>> Any elmers??
>> KE5HDF
>> Ralph
>>
>>
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