Re: Elecraft Digest, Vol 13, Issue 27 Balanced Automatic Tuners

[Wa6bfh]

Balanced Line Tuners
 
I don’t think you really want an Automatic tuner from Elecraft -- unless  
they perhaps decide to venture into a new nitch in terms of a superb KW tuner  
that works well with their and other radios.
 
First the reason that I say KW TransMatch is that you have to think in  terms
of at least 100 Watt power levels of the K2100 and most other transmitters  
of our day. If you are going to tune out what may well be a 10:1 or even
greater  reactance at 100 Watts, that could be thousands of volts. The tuner design
must  accommodate this.
 
I would welcome seeing Elecraft or any manufacturer produce a software  
driven ‘truly balanced tuner’. Nothing like this now exists on the market. There  
are and have been some such unbalanced tuners that will match an antenna in
the  middle hundreds of Ohms. Even these won’t go beyond 600 or 800 Ohms, and
that is  simply not enough for a well engineered station.
 
A software {or firmware} driven TransMatch that would tune from about one  
half Ohm, to about 2000 Ohms, and handle the reactive voltages that may be  
imposed at considerably higher power levels would be quite intriguing!
 
73! de John WA6BFH

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[Matt and Kelly]

I need a little assistance from other KX1 builders out there.

The manual states to solder the capacitor C56 between pins 2 and 3 of the
relay K1 (page 34, right side, second step).

How do I determine which pins are 2 and 3?  I DON'T want to get this wrong
now...

Thanks.

Matt - K7OE

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[David Morley W8IXY]

4933 has been inventoried, only a couple parts MIA no biggie. I can't wait
to put the kit together.
I am overwhelmed by the vastness of the kit. I have only built 1 kit with
through hole soldering "solder joints on both sides of the board"
the kit was a M3 semiconductor tester and that was a breeze to assemble.
also I am looking for a L\C meter that sells for 100.00 via kit it has a tan
case with pigtail leads or a 2 pin breadboard style test points.
TU Dave AB8TN


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[Dave G.]

Matt,

If you look at Fig 13 on page 34, you will see a 'solder
blob' just above the letters 'CB' - the next two 'blobs' to
the right of that are pins 2 &3.

If you download the pdf version of the manual,you can word
search and 'expand' the illustrations to make them VERY
clear...

Hope this helps..

Dave KK7SS

> I need a little assistance from other KX1 builders out there.
>
> The manual states to solder the capacitor C56 between pins 2
> and 3 of the relay K1 (page 34, right side, second step).
>
> How do I determine which pins are 2 and 3?  I DON'T want to
> get this wrong now...
>
> Thanks.
>
> Matt - K7OE
>
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
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>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>

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[Ron D'Eau Claire-2]

Matt - K7OE - asked:

I need a little assistance from other KX1 builders out there.

The manual states to solder the capacitor C56 between pins 2 and 3 of the
relay K1 (page 34, right side, second step).

How do I determine which pins are 2 and 3?  I DON'T want to get this wrong
now...
------------------------------------------

Figure 13 just below that step in the manual shows C56 in place on the
center two pins (2 and 3) on the side closest to the trimmers (or where the
trimmers will go).

My apologies for the illustration showing parts that haven't been installed
yet. C56 was added AFTER I did the build and took the pictures.

Ron AC7AC


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