| 
				  
 
			
			
 Mark S. Holden wrote:
 "Vince Fiscus, KB7ADL" wrote:
 
 Cut your antenna to the frequency or band of choice.  Listen with the
 balun in, then listen without it.  I'll bet you won't be able to tell a
 difference.   In fact, there will even be a little loss in the balun.
 The point I'm trying to make is,  Cut your antenna to the frequency you
 want for best performance and you won't need to waste money and time
 building baluns.
 
 KB7ADL
 
 
 
 The typical SWL listens on several bands so they'd need more antennas.
 
 I guestimate my cost for a 9:1 transformer at about $2.  I probably spend about half an hour making and installing one.
 
 You can't buy a remote RF switch or very much coax for $2.
 
 Also, I find the ferrite greatly reduces RFI that is brought back to the antenna on the shield of the coax.
 
 For receiving a balun is of little value. For a certain length of
 antenna there is one wavelength that gives the ratio at which the
 balun is designed for.  When you go to different wavelengths then
 the antenna shows a different impedance and the balun may do more
 harm than good. The best bet for the SW listener who usually uses
 a long wire antenna, is an antenna tuner to match the receiver to
 varying impedances.
 
 
 |