[NLRS] RE: 47 GHz EME & Liquid Nitrogen Surplus

[Dana Shtun]

Congrat Barry! that's quite an occomplishment!
I hvn't seen a dewar since university...you might try
your local physics dept(?)
Sid may have a line on something like that...

As far as 10 GHz goes, the wx here is chilly...brrrr
snow can't be too far away...(can't believe I said that hi)
73 dana


>From: Barry Malowanchuk <ve4ma at shaw.ca>
>To: NLRS <nlrs at mailman.qth.net>
>CC: Dana VE3DSS <ve3dss at rac.ca>, Steve Kavanagh <sjkavanagh1 at yahoo.ca>
>Subject: 47 GHz EME & Liquid Nitrogen Surplus
>Date: Thu, 12 Aug 2004 18:28:03 -0500
>
>Good Evening All,
>
>I have been playing with 47 GHz EME and last sunday was the first one to 
>hear signals from RW3BP in Moscow !
>
>Signals were very weak which may be surprising considering that Sergei was 
>running 140 Watts to a 6 ft dish ( ERPof ~70MW). The atmosphere is very 
>thick with humidity and this was seen on 24 GHz.  Here in NA we only have 
>30 W transmitters and for EME  to be possible before the dead of winter ( 
>not far away), I want to make the move to cooling my preamp with Liquid 
>Nitrogen.  This has been shown to reduce the receiver noise figure from 4.1 
>dB to about 1.4 dB, which should go along way to making up for the low 
>transmitter powers ( only 30 MW ERP ) here in North America.
>
>I wonder if the surplus stores in the Minneapolis/ Toronto area have any 
>Dewar vessels for storing Liquid Nitrogen???  I have looked on EBay but I 
>do not need something large ( 30-40 Litre capacity) , but rather in the 10 
>litre range.
>
>I would appreciate it if you would pass on any leads on a source for such a 
>thing.
>
>Since Sunday W5LUA , AD6FP and VE7CLD have all heard Sergei,  no one has 
>heard AD6FP who is the only NA station with his TX 
>operational..........good thing I have vacation next week!
>
>Thanks and Best 73
>Barry VE4MA
>
>PS: Should I take a parka for the 10 GHz contest beside Lake Superior??

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