Jim - NN7K wrote:


Ian White G/GM3SEK wrote:

LEGAL WARNING: positive gain coax was patented in the late 1980s by
the muTek company in Britain, under the brand name "Gainiax".
Following established precedent in this newsgroup, unauthorized
users of this patented technology will be pursued with the full
vigour of the law.
muTek advertised this new product in an April RadCom... and received
several serious inquiries.
Unfortunately the factory did not survive the first production run.
The last words heard over the phone were "You want the ends of these
reels shorted together?"


I was wondering why I hadn't heard of any muTEK replacement boards for
any of the newer UHF-VHF rigs--- And, now i KNOW WHY! Jim NN7K

The firm has been sold on twice since the Good Old Days.

Meanwhile its first - and last - production batch of Gainiax (TM) is
still melting its way down towards the centre of the Earth.


--
73 from Ian G/GM3SEK 'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.co.uk/g3sek

It fits in well with the nonsense issued by the CIA and the USA and UK
governments about weapons of mass destruction. Although in this
isolated case it appears no lives have been lost in the London
Undergroud.
----
Reg.

"...no lives have been lost in the London Undergroud (sic)..." ?!?

Well Reg, the reality factor of THIS comment is consistent with
that of your usual comments relating to terrorism, at least.

BTW, how IS life on Uranus? And how do you get that hallucinogenic
wine you talk about delivered way out there?

"Reg Edwards" wrote in message
...
It fits in well with the nonsense issued by the CIA and the USA and UK
governments about weapons of mass destruction. Although in this
isolated case it appears no lives have been lost in the London
Undergroud.
----
Reg.

Hank, try also googling 68999 coax and you'll get a little more. Is
there nothing you can identify as a manufacturer's name or logo?

You should be able to estimate the loss pretty accurately from the
size, and you should be able to measure the impedance with enough
accuracy for amateur use pretty easily. Resonance and physical length
will tell you the propagation velocity, if you need that.

I'd guess it to be Teflon-insulated and Teflon-jacketed. Does it
matter a whole lot for what you want to do with it?

Cheers,
Tom

Stick to antennas Reg.

"Reg Edwards" wrote in message
...
It fits in well with the nonsense issued by the CIA and the USA and UK
governments about weapons of mass destruction. Although in this
isolated case it appears no lives have been lost in the London
Undergroud.
----
Reg.

I called Times Microwave and got a spec sheet by email. It is exotic, 50
ohm high temp good to 200 deg. C. Attenuation is .55dB/100' @10 MHz and 5.8
dB @ 1 GHz. Double shield and center conductor are all silver covered,
dielec is Teflon and outer jacket is fluorinated ethylene propylene.
Operating voltage is 7KVRMS & strength is 12 KVRMS. VP is 76%. Neat stuff,
made special for Boeing. Thanks to all who helped

73
Hank WD5JFR
"Henry Kolesnik" wrote in message
.. .
At the OKC hamfest I got a piece of neat looking coax that is double
shielded with silver braid, with a sort of clear pink outer cover. It has
connectors so I don't know the thickness of the center conductor.
It's stamped with the following characters:
68999, AA-2831. 81205, 204-15578-1, AUGUST 1996

I asked the seller, an ex-Boeing employee about it and he said it's the
same kind as used in Air Force One. He couldn't recall the specs but said
it was Teflon, good to a Gig but he had used it outdoors. for 2 meters
and 440.

Can anyone tell me more or point me to a site?
tnx
--

73
Hank WD5JFR


I've tried to find the specs but get only one hit googling::
http://www.waea.org/tech/techdocs/SatSpec0798V1.doc

This site kind of confirms what the seller said.

"Ian White G/GM3SEK" wrote in message
...
Don Baker wrote:
The recent popularity of a new antenna cable called Skyhighgain Coax has
created a safety problem for users and a nightmare for firefighters. SHGC
was developed theoretically by Tricenters Experimental Laboratories, Inc.
as a signal-boosting element for use in radio and television transmission
lines. Scientists at TELI discovered that when a bias voltage is applied
to the special material used to make SHGC the effect was incredible.
Instead of simply reducing signal loss, the signal strength increased!

Amplification of RF (radio-frequency) signals in the new coaxial
transmission cable was actually greater than 3 db (decibels) per meter per
meter. (Read that again.)

LEGAL WARNING: positive gain coax was patented in the late 1980s by the
muTek company in Britain, under the brand name "Gainiax".

Following established precedent in this newsgroup, unauthorized users of
this patented technology will be pursued with the full vigour of the law.

muTek advertised this new product in an April RadCom... and received
several serious inquiries.

Unfortunately the factory did not survive the first production run. The
last words heard over the phone were "You want the ends of these reels
shorted together?"


--
73 from Ian G/GM3SEK 'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.co.uk/g3sek

Punishment for breaking Ohm's law is severe and instantaneous.
There is no higher court.to hear any appeal.
You have been warned!