On Jul 9, 2006, at 10:26 AM, J F wrote:
Didn't the allies look into building aircraft carriers
from ice?
Picrete - a mix of water and sawdust frozen solid.
if you had impregnated the ice with say fine
copper mess, would it not also be somewhat of an RF
sheild... or maybe just a good ground
Alex NS6Y wrote:
In my reading about green radios I can't afford (but want anyway) and in
various readings I've heard that detecting the 455-kHz LO of a superhet
isn't all that hard, and that for instance in countries that require a
radio license, they use such techniques to check if
In my reading about green radios I can't afford (but want anyway) and
in various readings I've heard that detecting the 455-kHz LO of a
superhet isn't all that hard, and that for instance in countries that
require a radio license, they use such techniques to check if people
in their houses
Aha that sounds like Pycrete! Fine wood fibers, mixed with water to
make a slurry, and frozen. Interesting stuff, read up on it if you
want to be entertained! 73 de Alex NS6Y.
On Jul 9, 2006, at 7:26 AM, J F wrote:
Didn't the allies look into building aircraft carriers
from ice? if you had
Habbakkuk- and yes, it was built with Pyecrete. A model of the real
thing was built at Patrica Lake in Canada. The most useful purpose
would have been to bridge the Mid-Atlantic Gap, but by the time
the thing could have been built, aircraft range had increased, and
escort carriers
In a message dated 7/10/06 4:40:39 PM Eastern Daylight Time,
[EMAIL PROTECTED] writes:
, they use such techniques to check if people
in their houses have radios (or TVs) that they're not on record of
having licenses for!
Bit of history:
Way back about 100 years ago, there was little
In a message dated 7/8/06 10:33:47 PM Eastern Daylight Time, [EMAIL PROTECTED]
writes:
Hence Germany had to bring a device nearly to the point of fool-proof
perfection before releasing it for use, whereas the British could put
systems barely past the prototype stage into operations, knowing
But the German radar detector receivers used supperregenerative
detectors,which radiate a weak signal.
Don't know whether this is apocryphal or not, but I had heard from a
former USAF EW tech that the VC in Viet Nam in the early days figured out
how to make U.S. field superhets' LO howl , giving
I apologize to everyone how this thread has drifted.
I only asked if anyone has knowledge of where to
obtain plexiglass for my K2. Appreciate if we can
stay on topic. We are now into German Warfare and
has nothing to do with plexiglass. Please Gentlemen.
73
john-n4dsp
John,
Look in your phone book yellow pages for a local commercial plastics
supplier. They often have cut-offs for sale at modest prices. If you have
to buy a whole sheet, take along a wheelbarrow full of money.
73,
Don W3FPR
-Original Message-
I apologize to everyone how this
: Sunday, July 09, 2006 6:40 AM
To: Elecraft reflector; n4dsp
Subject: RE: [Elecraft] plexiglass
John,
Look in your phone book yellow pages for a local commercial plastics
supplier. They often have cut-offs for sale at modest prices. If you have
to buy a whole sheet, take along a wheelbarrow full
Don, W3FPR wrote:
Look in your phone book yellow pages for a local commercial plastics
supplier. They often have cut-offs for sale at modest prices. If you have
to buy a whole sheet, take along a wheelbarrow full of money.
--
You might do well
I gave John a bum steer I guess. Tap Plastics appears to be a west-coast
company. They have a web site at:
http://www.tapplastics.com/
They've been an invaluable resource for me for a variety of things, radio
and non-radio related. Maybe someone knows of similar companies serving
other areas of
On Sun, 9 Jul 2006, Ron D'Eau Claire wrote:
I gave John a bum steer I guess. Tap Plastics appears to be a west-coast
company. They have a web site at:
http://www.tapplastics.com/
They've been an invaluable resource for me for a variety of things, radio
and non-radio related. Maybe someone
Screen (silk screen) printers and sign printers often have small pieces of
plexi left over from jobs that they might be willing to sell at a modest price.
Mike, KC2TP
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The trick is often in cutting or drilling it cleanly and squarely without
melting or scratching it, and in polishing the edges. The nice thing about a
place like Tap Plastics is you take a template or dimensions to the store
and in a few minutes you walk out with nicely cut, polished and even
In a message dated 7/9/06 8:29:47 AM Eastern Daylight Time,
[EMAIL PROTECTED] writes:
Don't know whether this is apocryphal or not, but I had heard from a
former USAF EW tech that the VC in Viet Nam in the early days figured out
how to make U.S. field superhets' LO howl , giving away qth,
How about making our own Hex Key covers?
Tony W7GO
- Original Message -
From: Ron D'Eau Claire [EMAIL PROTECTED]
To: elecraft@mailman.qth.net
Sent: Sunday, July 09, 2006 11:32 AM
Subject: RE: [Elecraft] plexiglass
The trick is often in cutting or drilling it cleanly and squarely
Brings back memories of The Visible Engine, doesn't it?
Brian, W0DZ
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of John R. Lonigro
Sent: Saturday, July 08, 2006 4:30 AM
To: elecraft
Subject: Re: [Elecraft] plexiglass
John:
It would be nice, but acrylic
On Sat, 08 Jul 2006 05:30:16 -0500 John R. Lonigro
[EMAIL PROTECTED] writes:
John:
It would be nice, but acrylic doesn't make a very good RF shield!
Ah... what we need is transparent aluminum. But, of course we don't have
such a thing. at least. not officially
clandestinely yours,
]
[mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED]
Sent: Saturday, July 08, 2006 12:43 PM
To: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] plexiglass
On Sat, 08 Jul 2006 05:30:16 -0500 John R. Lonigro [EMAIL PROTECTED]
writes:
John:
It would be nice, but acrylic doesn't make a very good RF
On Sat, 8 Jul 2006 [EMAIL PROTECTED] wrote:
On Sat, 08 Jul 2006 05:30:16 -0500 John R. Lonigro
[EMAIL PROTECTED] writes:
John:
It would be nice, but acrylic doesn't make a very good RF shield!
Ah... what we need is transparent aluminum. But, of course we don't have
such a thing. at
Ah, this explains the cost of aluminum these days !!! HI
73, Jamie
WB4YDL
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of DAVID
Sent: Saturday, July 08, 2006 12:23 PM
To: Elecraft@mailman.qth.net
Subject: RE: [Elecraft] plexiglass
Wait Scotty showed
On Sat, 8 Jul 2006 11:42:50 -0500 [EMAIL PROTECTED] writes:
Ah... what we need is transparent aluminum. But, of course we don't
have such a thing. at least. not officially
In the interests of academic integrity, I gotta come clean :^))
In his book The Wizard War Prof. R. V.
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