LF: RE: Re: Re: Re²: Tune the loop with varicap or tuning condenser

[jan-martin.noding@telenor.com]

Hi

 

I got to the conclusion that the coupling loops should have an area of 1/100's the tuned loop.
Note that some suggest using tuning capacitor for the loop. My loop tuning is so sharp - it is 25dB variation from 136-138.8kHz, so the only way out is to use varicap tuning

 

73 Jan-Martin

---
J M Noeding, LA8AK QRL: 9077-7126 (QTH: 0047-380-87178)

-----Original Message-----
From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org]On Behalf Of F6CWN
Sent: 13. august 2004 14:32
To: rsgb_lf_group@blacksheep.org
Subject: LF: Re: Re: Re²: Tune the loop...

13./08/2004   1211z

 

Hi Bryan,

 

I also used a loop with a second loop inside, then i receive very well a submarine transmitter very close...

The mutual coupling between the low Z pick up loop and the "RX" loop elarge the BW...They are no miracle!

Maybe the loop # 142857 will be perfect, wait and see!  :-))

 

 Jeff / F6CWN

----- Original Message -----

From: captbrian

To: rsgb_lf_group@blacksheep.org

Sent: Friday, August 13, 2004 11:05 AM

Subject: LF: Re: Re²: Tune the loop...

Merci,

 I wonder why you don't use the commonplace  (for higher frequencies ) small  loop inside the bigger one for impedance transformation and variable coupling?. Notice I am learning from others' mistakes before making my own loop  :-))

 

Bryan G3GVB