[Lowfer] LF Lop Antennas [AKA Loop Antennas]

[Peter Cranwell]

For what it's worth..... I found the more wire you can use in the loop the 
better the S/N ratio.  With my loop tuned using min capacity I can receive 
LoranC on my Tektronix without a receiver, just a preamp.  If I cut the 
number of turns and andd capacitance, the S/N drops , mostly because of the 
decreased signal.

I get a 1MV signal on my scope directly connected to the loop prteamp at 100 
KHZ.

I stopped worrying about Q.  I don't ignore it bt I keep it in perspective.

I remember some early experiments with Ken Cornell "K" in Westfield NJ.  I 
was using a 365 uuf varriable and a 2.5 Mhy RF choke for my ant tuner and 
got consistently better reports than Ken with his basket weave coils.  As I 
remember, we were both using 2E26s in the final ..... sort of 1 watt.

Pete  WA2EIN  ( "P"  on  189.5 back in late 60s early 70s, before Ken moven 
to Pt. Pleasant)
----- Original Message ----- 
From: "Ed Phillips" <evp at pacbell.net>
To: "Discussion of the Lowfer (US, European, &amp; UK) and MedFer bands" 
<lowfer at mailman.qth.net>
Sent: Monday, August 25, 2008 8:16 PM
Subject: Re: [Lowfer] LF Lop Antennas [AKA Loop Antennas]


>I have a working Heath Q meter which I callibrated.  If anyone is 
>interested in it, I'll give it up.
>
> Pete"
>
>    I already have one but that's a good deal for someone as it's plenty 
> good enough for most government work.  Also have a Boonton 260A which is 
> better but so much heavier that it sits on the shelf most of the time.  I 
> don't think either is really suited to precision capacitor Q measurement. 
> As I recall the Boonton instruction book describes a procedure which is 
> probably better than nothing but any decent capacitor is going to have Q 
> which is much higher than that of the test coil.
>
> Ed
>
> _______________________________________________
>>From the Lowfer mailing list
> Send messages to: Lowfer at mailman.qth.net
> To sub/unsub visit: http://mailman.qth.net/mailman/listinfo/lowfer
>