[HBR] High-carb link LEXAN DENCO COILS microwave test polystyrene

[Rob]

Is polystyrene used in anything common like  disposable plastic drinking
cups?




On Mon, 2015-10-19 at 11:42 -0700, Brian Burns wrote:
> Hello Rob,
> 
> 
> When I worked at Hansen Labs at Stanford, and we wanted the lowest
> loss plastic at RF, we used polystyrene. Not the best mechanically.
> 
> 
> Cheers,
> 
> 
> Brian
> 
> 
> On Sun, Oct 18, 2015 at 10:46 PM, Rob <roomberg at ptd.net> wrote:
>         Yes... been there with epoxy glue I used as antenna element
>         isolators.
>         I filled a cup with glue and microwaved it after it got hard
>         to see if
>         it warmed up.
>         It definitely warmed but not a lot.
>         Nothing like a tea cup of water.
>         
>         
>         
>         
>         
>         Something I remember from "Ye Olden Daze" is that whatever
>         material you
>         intend to use FOR the coilform - put it in a microwave for
>         about a
>         minute
>         (on High).  If it gets hot, don't use it... the reason is
>         obvious.
>         
>         Tom - W0EAJ
>         
>         
>         
>         
>         On Sun, 2015-10-18 at 19:29 -0400, Rob wrote:
>         > Have you used LEXAN to make DENCO coils like these:
>         > http://www.learnmorsecode.com/denco/index.html
>         >
>         >
>         >
>         >
>         >
>         >
>         > -10-18 at 22:22 +0000, Shoppa, Tim wrote:
>         > > At the other end of the spectrum, I'm highly in favor of
>         high carb (that is, polycarbonate) coil forms.  Polycarbonate
>         is easy to work with regualr woodworking tools and does not
>         crack like acrylic.
>         > >
>         > > Some links:
>         > >
>         > > http://www.usplastic.com/catalog/item.aspx?itemid=23791
>         > >
>         > > http://www.mcmaster.com/#polycarbonate/=zfbyo6
>         > >
>         > > http://www.eplastics.com/Lexan_Polycarbonate_Tube
>         > >
>         > > Tim N3QE
>         > >
>         > > ________________________________________
>         > > From: HBR [hbr-bounces at mailman.qth.net] on behalf of Brian
>         Burns [brian at lessonsinlutherie.com]
>         > > Sent: Sunday, October 18, 2015 4:13 PM
>         > > To: 'HBR Receiver List'
>         > > Subject: [HBR] Revised Low-carb links
>         > >
>         > > Hello All,
>         > >
>         > >
>         > >
>         > > I just discovered that the last internet link on my
>         collection of low-carb
>         > > links goes to my purchase of a Hickok VTVM on
>         Ebay---honest, I didn't mean
>         > > to gloat! If you would like a copy of the revised list of
>         links, just email
>         > > me off or on the list and I'll send it along.
>         > >
>         > >
>         > >
>         > > Cheers,
>         > >
>         > >
>         > >
>         > > Brian Burns
>         > >
>         > >
>         > >
>         > >
>         > >
>         > >
>         > >
>         > > ---
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