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You may or may not be aware that the BLT tuner is just as it's named:
Balanced Line Tuner. It's for balanced lines only (ladder line, TV ribbon,
etc.) and not for any antennas designed for coax feed.

It can be built into a very small container.

-- Bil KD6JUI

The BLT tuner is available...I just built one, nice kit....with a ribbon
wire feeder and mini dipole i was able to work several states on 10,15,17
meters (ssb) on a quick test in my back yard with the dipole hanging from a
tree 8 feet off the ground. the tuner is very small and has a neat tuneup
led. you will like it.....thanks ,bill wb2iwc

Hi Steve,

Could you please publish more info about the NorCal QRP BLT tuner

73! Mike

From: ham73ch@...
Date: Sat, 02 Jun 2001 20:53:34 -0000

Hi Steve,

Could you please publish more info about the NorCal QRP BLT tuner

You can take a look at . It was last
years project, and I have no idea if any are still available.
I suspect not as a kit.

73, doug

"It's for balanced lines only "
Not true, there is a mod, accessible from the Norcal webpage.

Glyph wrote:

It's for balanced lines only (ladder line, TV ribbon,
etc.) and not for any antennas designed for coax feed.

Well, yes, but it comes with directions on how to mod it to feed
coax, which takes all of 3 short pieces of wire, a chassis-mount BNC
female (or your favorite coax connex), and an SPDT switch.

It's really just a good implementation of the classic Z-match ATU
(which, IIRC, is the same as the ZM-2 everyone raves about) It uses
low-power, easily available components; I believe the variable caps
are actually designed for use as trimmers. It includes a 50-ohm
absorptive bridge to ensure that you don't fry the finals in case of
a huge impedance mismatch. Also, there is an SWR "indicator" in the
form of an LED fed with a diode pointed in the reverse direction, if
you follow. When it goes out, you're at 1:1. It is "rated" by
NorCal for 5 watts but they say on the website they think it should
be good to 10.

I don't tune for low SWR; I tune for max power out (& trust the
protection circuit in the rig), so I didn't put the LED in. I also
didn't use the case that comes with it (a "roll-your-own" out of PC
board & a clear plastic top). I put it in a ****4"x2"x1"**** Radio
Shack plastic box I got for $2. Talk about tiny!

2 transformers to wind (one big for impedance transformation & one
small for the LED. Very easy to use. Flip the impedance switch
(selects output winding on the big toroid) to High, then tune the
caps. If you're not satisfied, flip to Low impedance, and try
again. I matched an 8-1/2 foot whip on my truck on 40M (and I think
80 also). External SWR meter then showed 1:1. WOW!

$29 incl. US shipping; don't know if they ship overseas. I believe I
already posted the URL; if not, start at www.norcalqrp.org and
navigate.

yes, the mod allows for coax or long wire feed.......works like a dream.
all for 29 bucks......takes a couple of hours to build.....good luck,
bill,wb2iwc