[Lowfer] Scoop on the Loop

Thu, 13 Nov 2003 16:34:27 -0600

Gotcha, Paul, and like your thought on another pass through the
toroid.

Suggest you allow for another joint, here from the end of the main loop
into a smaller, say 1/8 inch tubiing that's silver soldered to main. Tie
the bulk of C for resonance at the loop and allow for to minor
connections to a sheltered vari-C, may be a compression type of, say, 20
pct. of total C. Yeah, the bolt has to go.

Just some thoughts,
Peter
-------------------------------------------
>>> [email protected] 11/13/03 04:13PM >>>
Peter,

All the soldered and mechanical connections are at the tuning device as
you
speculate.

From the ends of the tubing, there is a piece of 1" tinned braid. Thats
2
solder connections.
On the capacitor in the PVC box,  there are 2 more pieces of 1" braid
soldered to it. This braid terminates
on a stainless bolt that passes thru the box and connects to the
braid,
soldered to the tubing.

All told there are about 8 either solder or contact connections.

Hope to solder the Cu tubing directly to the capacitor when done
eliminating
all but 2 of the connections.

On the single pass thru ferrite, I would like to get 2 turns if I
could,
only to allow more turns on the primary
which would allow finer tuning of the match.

Paul A. Cianciolo
W1VLF
Beacon "USA" 1704.805.00 Khz QRSS 3
FN 31

-----Original Message-----
From: [email protected] 
[mailto:[email protected]]On Behalf Of Peter Barick
Sent: Thursday, November 13, 2003 1:55 PM
To: [email protected] 
Subject: Re: [Lowfer] Scoop on the Loop

Interesting, Paul ...

Good explanation on the MF loop. I first envisioned it being of Cu
pipe, though unfamiliar w/ ".625."

So my new take is it is Cu tubing that came in a handy roll. If that
is
so, what did you imply when saying "eliminate joints ... mechanical
connections," where would they be, in the tuning net?

Also, the ferrite core only has one "pass" for the antenna coupling,
huh? Neat.

If it is made of a roll of tubing, had you thought of configuring it
as
a circle, for max area per perimeter length?

Looks like you have a winner from these recent reports.

Peter

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