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JohnBG8JMB · 14th Aug 2020, 9:43 pm

I've probably missed something, but am I correct; is this an unscreened loop ~1m dia?
How does the performance of this compare with a screened loop?, [ie, I turn in a circle of metal tubing split opposite the feed point]

And what is a Moebus coax loop?

The amplifier configuration is also used, in a single ended configuration, in the Lowe HF225 rx as a wideband whip preamp, using a ZTX327, and in various things at Racal...
ZTX327 was AFAIRR the same chip as the BFY90- so I would not expect the 2222 to work well at higher frequencies; you need a 2N5109 [now unobtanium] or better for HF
73
John G8JMB

14th Aug 2020, 9:43 pm	#14
JohnBG8JMB Pentode Join Date: May 2006 Location: Poole, Dorset, UK. Posts: 130	Re: Lockdown Loop Aerials I've probably missed something, but am I correct; is this an unscreened loop ~1m dia? How does the performance of this compare with a screened loop?, [ie, I turn in a circle of metal tubing split opposite the feed point] And what is a Moebus coax loop? The amplifier configuration is also used, in a single ended configuration, in the Lowe HF225 rx as a wideband whip preamp, using a ZTX327, and in various things at Racal... ZTX327 was AFAIRR the same chip as the BFY90- so I would not expect the 2222 to work well at higher frequencies; you need a 2N5109 [now unobtanium] or better for HF 73 John G8JMB