Your right John! - Must be this leap forward in Eu that did it, or wishful
thinking on my part....apologies all - I should look more closely at the
clock/date times.
Thermals and toroids etc
Ive been playing with this thermal aim and fire temp device (Costco abt 70
USD Birthday present) and although I cant vouch for some of the direct
figures given their surface characteristics it does quickly point to where I
can do better.
Measurements March 30th 0130Z - Wind S20 Knots, relatively calm in Coupler
housing - Coupler lid off for 15 mins prior to readings -
Loop Coupler design schematic see W1TAG web or my site
Ambient air 20.6C
Transmitter power into Coupler 1Kw Duty whatever XDW at DFCW90 is plus CW id
Cap Sangamo G3 1.8nF 25.2C
Cap Sangamo G3 3.0nF 26.6C
Cap Sangamo G3 7.5nF 34.3C
Cap Sangamo G2 3.0nF 28.6C
Looks like the sharing of the loop current of over 46.5A is working pretty
well - even the "small" G2 at 3nF is standing the losses.
Main matching toroid (2:18) 3 stacked 70mm diam 3C90 - 41.8C (had been
50.1C with lid taken off)
These toroids I think are the near equivs of Ferroxcube T87/54/14 and
3C90 material
Wires temps in loop - ambient as far as I can tell.
Inside radio room - Ambient 23.5C
Decca PA modules heat sink temps- no air cooling - 1.1Kw input
Module 1 43.6C
Module 2 42.7C
Module 3 43.2C
Homebrew wrapped with black anti abrasion tape (3M) LPF Toroid. (2 x stacked
3C90 but around 42mm diameter) 58.1C, OK well below the Curie point (over
200C?) but I have some small losses here....
More useful/useless info to follow...
Laurence KL1X
From: "John Andrews" <[email protected]>
Reply-To: [email protected]
To: <[email protected]>
Subject: LF: Re: TA
Date: Wed, 30 Mar 2005 01:26:32 +0100
Laurence,
> XDW into CT1 pre dusk here in OK. XGJ strong too. Looks like a good nite
> coming....
More like a deja vu pre-dawn by the time and date on the capture.
JA
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