Connect a 500 Ohm Antenna using Matching Transformer {Balun} ?
-or- Antenna Pre-Selector ?
http://groups.yahoo.com/group/Shortw.../message/11909

- - - In ,
- - - "Adam E." gccengineering@... wrote:

- What part number toroid would you recommend for this project?

* Balun Kit Toroidal Type 1-28Mhz
http://cgi.ebay.com/_W0QQitemZ200032993776

Balun Kit Toroidal Type 3-30Mhz
http://cgi.ebay.com/_W0QQitemZ200032993780

Balun Kits : AB-200-10 -or- AB-240-125
http://www.universal-radio.com/catalog/misc/1525.jpg
http://www.universal-radio.com/catalog/misc/amidon.html
http://www.amidoncorp.com/aai_cost_experimenter.htm
http://www.bytemark.com/products/kit_bal1.htm
http://thewireman.com/baluns.html
http://www.k1cra.com/catalog/product.aspx?productID=735

Another is W1CG's Low Power Balun Kit
http://www.njqrp.org/balun/
http://www.dxzone.com/cgi-bin/dir/jump2.cgi?ID=12668

Consider the "Ready-Made" Matching Transformer designed
to be used with a Longwire {Random Wire} Antenna the
RF Systems Magnetic Longwire Balun (MLB)
http://www.universal-radio.com/catalog/sw_ant/1484.html

Read About - Feeding an End-Fed Antenna with a 9:1 Matching Transformer

http://www.geocities.com/amdxlog/balun.html
http://www.geocities.com/amdxlog/balun1.html

- Also can I also use a preselector with this antenna project
- since it will keep out of band signals of the frequency?

-R- That would be a good idea and one way of approaching the
problem of Out-of-Band Signals with your Grundig S340DL Radio.

* MFJ 956 Shortwave Antenna Tuner / Pre-Selector
http://cgi.ebay.com/_W0QQitemZ150067583121
http://www.universal-radio.com/catal...amps/2964.html

* * Read - MFJ-956 Mods Updated...Tested
http://groups.yahoo.com/group/Shortw...a/message/9913
http://www.geocities.com/amdxlog/mfj956.html

* * * Read - The Betts Pre-Selector
{A Do-It-Yourself Project}
http://www.geocities.com/amdxlog/preselector.html
If You Built-It : You Will Hear Them ! {There out There}

Plus - Check-Out the Site Up-Dates for "Pre-Selectors"
-by- Robert W. Betts
http://groups.yahoo.com/group/Shortw.../message/10075
http://www.geocities.com/amdxlog/index.html
http://www.geocities.com/amdxlog/pregroup.html
* Preselector : Basics
* Preselector : Design & Theory
* Preselector Pix - Five Examples
* Newest Mini-Type 4 Preselector
* Type - 3A Preselector Schematic
* Let's Build the "Type 3" Preselector!
* Souped-Up : MFJ-956 Preselector
* Richard's Preselector Project
* New - Preselector Type-5
* A Simple Preamplifier

* MFJ 1045C Pre-Selector
http://www.grove-ent.com/MFJ1045C.html
http://www.universal-radio.com/catal...amps/0807.html

* Ameco "TPA" Tunable Pre-Amplifier Antenna
http://www.universal-radio.com/catal...amps/1512.html

-Or- If you can find and old Grove TUN-3 Pre-Selector
they are small and easy to use like the MFJ-956.

Read - The Age Old SWL'ers Question :
Do I Need a Antenna Tuner? -or- a Pre-Selector
http://groups.yahoo.com/group/Shortw...a/message/1449

Read - A 'look' at three MFL Antenna Turners / Pre-Selectors
http://groups.yahoo.com/group/Shortw...na/message/980

Read - Answers to 4 Random Wire Questions :
http://groups.yahoo.com/group/Shortw...a/message/1045
? Matching Transformer Ratio
? Balun
? Wire Antenna Element Size & Shape
? Antenna Tuner -or- Pre-Selector


hope this helps - iane ~ RHF
..
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