----- Original Message -----
From: "Roger" <sub1@rogerhalstead.com>
To: <amps@contesting.com>
Sent: Wednesday, September 15, 2010 6:45 AM
Subject: Re: [Amps] Sourcing Sheet Aluminum
>
>
> On 9/14/2010 11:37 PM, Patrick Barthelow wrote:
>> Another post on the reflector recently asked about best alloys of
>> aluminum to use in Ham/Amp related projects, a good question, that
>> I dont know the answer to, just that I remember T-6 alloy is hard
>> stuff.
> It may be hard but it's relatively easy to form, holds its shape, and is
> strong. It is used to form not only aircraft skins, but aircraft skins
> that serve as structural members, or individual structure members
> themselves. It's also relatively easy to tap, or press screw heads into
> it...again I've forgotten the name of them. With skill the stuff can
> even be formed into complex shapes, but that's beyond most of us here.
>
>
> Too often people choose much softer grades that are easily scratched
> and deformed.
>
> 73
>
> Roger (K8RI)
>
>
>>
>> This is a tip to source sheet aluminum cheaply. Find your local Dep of
>> Public Works, the Road Maintenance crew. Go directly to their coporation
>> yard, or ask for their forman over the phone. Tell them you are a ham
>> looking for some aluminum for a Hombrew project, and ask it they have any
>> discarded road signs. It has been my experience that there is ofen a
>> stack of old signs somewhere off in a corner of the shop, that never gets
>> forwarded to recycling or whatever. The foreman, if he is a ncie guy, on
>> a good day, may simply direct youto the aluminum pile or old sign stack
>> in the back, and say take what you want. Leave him off a six pack of
>> soft drinks or 807s an he will be your friend for a long time. It is
>> amazing how big a stop sign is when it is set on your workbench. The
>> signs' paint I saw were usually pretty old, and weathered, but the
>> aluminum was often very good shape. Unfortunately so far is is usually
>> hard and brittle so won't bend well, but, the sheet siz
> es
>> are substantial and the price is right. A little polishing or orbital
>> sanding will get the aluminum to a nice surface sheen, and perfectly
>> usable.
>>
>> Best Regards,
>> 73, de Pat Barthelow AA6EG apolloeme@live.com
>> http://www.cq-vhf.com/vhf_highlights/2010_vhf/2010_summer_vhf/2010_summer_vhf_echoes_barthelow.pdf
>>
>>
>> MOONBOUNCE YURI'S NIGHT
>>
>>
>>
>>
>> _______________________________________________
>> Amps mailing list
>> Amps@contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>>
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
>have in mind that this kind of metals (aluminum aloys) that is used in
>aircraft are at the the face of shaping (for stractural member at the
>aircraft) are shoft , very soft so you can shape them
at the end of shaping they heat treated them ,then the propertys of them
are the one you describe Roger
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|