Hello Alan and Martin,
Saturday, January 1, 2022
I should be able to give this a go tomorrow and will report back. Thanks. One downside of the loop's relocation and my making it a smaller circumference (vertical elements of the rectangle remain the same, horizontal ones were shortened by about half) is LF performance, which was very good, has now taken an apparent dive...
I guess you win some and you lose some?
I have borrowed a 12V accumulator from a race car and have it on trickle charge tonight, so I can avoid the wrath of her indoors with a full size, wet cell car battery in the house. Race car batteries go in carrier bags, and what she doesn't know can't trigger her ;) I should be able to run the loop injector from this tomorrow, too.
Whilst I realize there's no such thing as perfection in an imperfect world, I am up for a bit more fiddling to see if things can be further improved :) To think I went about four or more years with this loop only really any use at all on LF.... Ignorance can be bliss though.
Best regards,
Chris mailto:chris@...
Mvgi> On Sat, Jan 1, 2022 at 02:39 PM, Alan wrote:
Mvgi> As Andrew said shorting the input is not a good idea and will
Mvgi> not do what you think it will. Leaving the terminals open will
Mvgi> but you need to disconnect both terminals.
Mvgi> Hi Alan,
Mvgi> OK, if this is problematic, then I'm not sure how the test I
Mvgi> was thinking of can be achieved.
Mvgi> My intention was to leave the loop in place with the ends
Mvgi> shorted, so that the differential mode is suppressed, leaving
Mvgi> only the common mode contribution from the loop and coax cable.
Mvgi> This method seemed to work OK for me when testing with a
Mvgi> Wellbrook type design, but I can certainly see the flaws
Mvgi> associated with doing it this way.
Mvgi> Regards,
Mvgi> Martin
