[Boatanchors] Speaker repair

J. Forster jfor at quikus.com
Sun Jan 15 17:57:27 EST 2012


Hmmm....  . As far as I can remember, I never wetted my wing coverings
before doping, and they did turn out nicely. Maybe it was some other kind
of paper waaaay back then?

-John

============



> Silkspan paper does not shrink unless it is wet with water and allowed to
> dry.
> Applied dry to a speaker cone with nitrate dope prevents shrinkage.
> Works great....as long as the speaker doesn't belong to me.
>
> Dave Harmon
> K6XYZ[at]sbcglobal[dot]net
> Sperry, Ok.
>
> -----Original Message-----
> From: boatanchors-bounces at mailman.qth.net
> [mailto:boatanchors-bounces at mailman.qth.net] On Behalf Of Glen Zook
> Sent: Sunday, January 15, 2012 4:03 PM
> To: jfor at quikus.com
> Cc: boatanchors at mailman.qth.net
> Subject: Re: [Boatanchors] Speaker repair
>
> Fact that the silkspan shrinks is the problem.  It works great for model
> airplanes (in my younger days I built quite a few), but the very fact that
> it does shrink when "dope" is applied could definitely cause physical
> distortion to the speaker cone.  Then, the physical distortion could cause
> distortion in the reproduced sound from the speaker.
>
> Using a paper that doesn't shrink is, in my experience, a much better
> solution.
>  
> Glen, K9STH
>
>
> Website:  http://k9sth.com
>
>
> ________________________________
>  From: J. Forster <jfor at quikus.com>
> To: Glen Zook <gzook at yahoo.com>
> Cc: "boatanchors at mailman.qth.net" <boatanchors at mailman.qth.net>
> Sent: Sunday, January 15, 2012 2:59 PM
> Subject: Re: [Boatanchors] Speaker repair
>
> Once doped, I doubt water would do much. Planes I built with it are intact
> after over 50 years.
>
> -John
>
> ===============
>
>> That paper was called "silkspan".  It worked better when it was
>> sprayed with water and then left to dry.  That pulled the covering
>> taught.  Then, "dope" was applied.
>>
>> I would be very hesitant to use this on a speaker because if the
>> humidity went up there might be a possibility of the paper shrinking
>> and distorting the speaker's cone.
>>  
>> Glen, K9STH
>>
>>
>> Website:  http://k9sth.com
>>
>>
>> ________________________________
>>  From: J. Forster <jfor at quikus.com>
>> To: mac <w7qho at aol.com>
>> Cc: "boatanchors at mailman.qth.net" <boatanchors at mailman.qth.net>; Glen
>>Zook  <gzook at yahoo.com>
>> Sent: Sunday, January 15, 2012 2:31 PM
>> Subject: Re: [Boatanchors] Speaker repair
>>
>> I think the paper is different.
>>
>> Years ago, there was a sort of open paper sold for covering model
>> planes, designed to be doped and shrink a bit. That might also work.
>>
>> -John
>>
>> ==============
>>
>>
>>> And you have a choice of brown or white...  :^)
>>>
>>> On Jan 15, 2012, at 11:28 AM, Moe Fretz wrote:
>>>
>>>> Coffee maker filters also work well.
>>>
>>> ______________________________________________________________
>>> Boatanchors mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Boatanchors at mailman.qth.net
>>>
>>> List Administrator: Duane Fischer, W8DBF
>>> ** For Assistance: dfischer at usol.com **
>>>
>>>
>>> This list hosted by: http://www.qsl.net Please help support this
>>> email list: http://www.qsl.net/donate.html
>>>
>>>
>>
>>
>> ______________________________________________________________
>> Boatanchors mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Boatanchors at mailman.qth.net
>>
>> List Administrator: Duane Fischer, W8DBF
>> ** For Assistance: dfischer at usol.com **
>>
>>
>> This list hosted by: http://www.qsl.net Please help support this email
>> list: http://www.qsl.net/donate.html
>
>
> ______________________________________________________________
> Boatanchors mailing list
> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Boatanchors at mailman.qth.net
>
> List Administrator: Duane Fischer, W8DBF
> ** For Assistance: dfischer at usol.com **
>
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> Boatanchors mailing list
> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Boatanchors at mailman.qth.net
>
> List Administrator: Duane Fischer, W8DBF
> ** For Assistance: dfischer at usol.com **
>
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
> ______________________________________________________________
> Boatanchors mailing list
> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Boatanchors at mailman.qth.net
>
> List Administrator: Duane Fischer, W8DBF
> ** For Assistance: dfischer at usol.com **
>
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>




More information about the Boatanchors mailing list