[TowerTalk] Balun Telrex

[k9zm at frontiernet.net]

Quoting CubexCo at aol.com:

> In a message dated 9/21/2004 11:26:07 AM Eastern Standard Time,
> towertalk-request at contesting.com writes:
> I need some help with a balun for a TB6Em too.
> Can anyone tell me if the balun is 1:1 or 4:1??
>
> 73, Tom W8JI
> ====================
> Tom,
> It should be 1:1, it uses a coil of Coaxial cable and a length of #10
> of
> insulated wire to make the balun.
>
> I had the predecessor to the TB6E called the TM-30C, it was the same
> design,using a hairpin loop for Z transformation.  I am sure the
> later models use the
> same balun design, Mike was not much for change.
>
> PS I enjoyed your article on receivers in World Radio.
>
> Regards,
> Norm W4QN
>

That's what my TB6EM had, but it was damaged by water intrusion.  I just
used a coil of RG-213 and it worked great on 15 & 20 meters.  On 10
meters, without that coil of 10ga wire (I thought it was about 14ga)
the resonant frequency was about Channel 19 in the CB band.

73
Greg K9ZM