[Lowfer] LF Coil Form

[Michael Sapp]

Stan & All:  Those compressed cardboard "sonotubes" are popular for 
telescope building. Might be some useful
info in the home scope builder domain for resin coating them.... that's all 
nasty chemicals tho, for $100 or so it's worth finding a tube section ready 
to go.... Mike wa3tts


----- Original Message ----- 
From: "stan, W1LE" <stanw1le at verizon.net>
To: "Discussion of the Lowfer (US, European, &amp; UK) and MedFer bands" 
<lowfer at mailman.qth.net>
Sent: Sunday, February 09, 2014 6:26 PM
Subject: Re: [Lowfer] LF Coil Form


> The round concrete form for footings is a good alternative from Home 
> Depot.
> Mine is 12.5" OD with 1/8" wall.   Buy the length you need in 4' 
> increments.
>
> It looks like compressed fiberboard, but I know that it disintegrates out 
> in the weather,
> but it matters not, because by then the concrete is hard.
>
> My thought is to wind the coil, then give it a coat or fiberglass resin 
> for a little waterproofing.
>
> Other possibilities are a 55 gallon white plastic drum with straight sides 
> or the 190 liter pickle barrels.
> I would avoid any colored barrels, like black, because of the pigmentation 
> may effect electrical performance, maybe.
> These UN rated plastic barrels are very durable and have lasted for years 
> in their outside storage role.
>
> I got my 55 gallon barrels for yard waste from a used barrel dealer.
>
> Stan, W1LE     Cape Cod
>
>
>
> On 09-Feb-14 4:08 PM, Peter Barick wrote:
>> OUCH, Old boy! Only $100?? ;~)
>>   Locally I've picked up scrap green sewer pipe from street work around 
>> town (only after hours). Always have remnants of those jobs. Last one was 
>> about 5 ft by 18 inches. Also found a 3 foot D pvc drum (no metal rings) 
>> that a business discarded full of trash. I emptied it for them. And I 
>> have a smaller 18 inch white pvc
>> bucket w/ straight sides, another discard.
>>   Has anyone noticed the cement formers sold in home inprove stores? They 
>> are hardened fiber and I believe up to 2 feet in D. And scant few bucks!
>>   Cheers, Peter, Illinois
>> ---------------------------------------
>>>>> pbunn <pbunn at matrixei.com> 02/07/14 8:28 AM >>>
>> Just a FYI
>>
>> I have been searching for quite a while for a reasonably priced coil form 
>> for 137 and 75 KHz. It ended up being right under my nose.
>>
>> Harrison Superduct - Plastic duct is available in many sizes up to 60" 
>> diameter. I just bought a 36" long 16 " OD section for just over 100 
>> bucks. That may sound expensive but compared to Schedule 40 or 80 pipe it 
>> is cheap. It is made of PVC and is thin wall duct. They take credit cards 
>> and will ship UPS but the plant is about 30 miles from here in Clover, SC 
>> and I can pick it up.
>>
>> Pat
>> WG2XLP
>> WG2XCT
>> N4LTA
>>
>>
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