[Elecraft] BL2 w/Multi-Band Dipole

[Ron D'Eau Claire]

Bill, I missed that the coax jumper was so short. A short bit of decent coax should not cause problems. David pointed out that he'd been advised not to hang the weight of the balun on the connector because the ANT connector is only supported by the PC board - there is not hardware attaching it directly to the enclosure. The KX3 does have hardware mechanically attaching it to the case, so that should not be a concern.

Ron AC7AC

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

Ron, I'm not reading what you're reading in this.  I read that he is going to run the ladder-line from the antenna, to the radio.  He seems to be asking if he can attach the BNC conector on the BL2 directly to the back of the radio.  I am considering doing just that with my KX3 when it arrives.  This eleminates the coax jumper altogether.  I would think it would be a very low loss way to go.  My only concern is that the whole thing gets pretty long and bulky hanging off the KX3. Prob not as much an issue with a K3/K2 radio.  What do you think?

...bill  nr4c

On Mon, 2 Apr 2012 09:13:16 -0700, Ron D'Eau Claire wrote:
> It sounds like you are planning to feed a single wire in the center 
> with 450 ohm ladder line so there will be standing waves on the feed 
> line.
>
> In that case it's *always* more efficient to bring the parallel wire 
> feed line all the way to the rig and avoid the use of 50-ohm coaxial 
> line in the system. How much depends upon the SWR, which varies widely 
> with frequency, and the length of the coax, but you can lose half of 
> your power, or more, in a coax link with high SWR.
>
> 73, Ron AC7AC
>
> -----Original Message-----
>
>
> Hello Everyone!
>
> I am planning on building a multi-band dipole fed with 450 Ohm ladder 
> line soon.  I have a K1 & K2, both with the ATU's installed, and the 
> BL2 switchable balun.  I was wondering if I could connect the balun 
> directly to the back of the K1/K2 when I use this antenna?  My other 
> option would be to use one of my 18" foot RG8X jumpers between the rig 
> and the balun.  I know someone here has done it, or at least knows 
> whether this will work or not.
> I am also posting this question to QRP-L, so I apologize if you see 
> this message twice.
>
> Thanks ES 73,
>
> David
> KC9EHQ
>
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