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GW,
The Grove Shortwave (SW) Pocket-Tenna Antenna was http://www.grove-ent.com/pocket-tenna.html mainly designed by Grove for Hand Held Scanners or "All Band" {HF-VHF-UHF} Hand Held Radios which simply had a small short Flexible Whip {Rubber Ducky} Antenna often connected to them using a BNC Connector. http://groups.yahoo.com/group/Shortw...a/message/9935 First the BNC Connector - Designed for Hand Held Scanners and Radios that often use them as an Antenna Connector and Input. Second the Length {Size} - Most of these Hand Held Scanners and Radios will OverLoad when a Larger Long Wire Antenna : Say a Dipole 'cut' for the 31 Meter Band is used with them rendering them useless. - - - 31 Meter Dipole Antenna 49 Feet Tip-to-Tip. I would suspect that Grove did a few Trial-and-Error 'design' {Prototype} Antennas and found that about Twenty Feet was all that most of these Hand Held Scanners and Radios could handle before 'Size' {Length} caused a problem with "OverLoading" the Radio's RF Front-End. Note - This is about the same length as the 23 Foot Portable Reel {Roll-Up} Shortwave Antennas that come with, or can be purchased for most 'portable' AM / FM Shortwave Radios. Again many of these 'portable' AM / FM Shortwave Radios will "OverLoad" when a Larger Long Size Antenna is used with them. Third - What to call {Label} this Antenna : # 1 - It is End-Fed. {End-Fed} # 2 - It is made from a single piece of Coax Cable {Liner} and designed to have Two Equal Sections made-up of the Coax Shield and Exposed Inner Conductor. {Balanced Mono-Pole} # 3 - Not Really designed to be Resonant at any Shortwave (HF) Band and used Across the Shortwave Bands. {All-Band} What's-In-A-Name : End-Fed Liner Mono-Pole All-Band Antenna ? TESTING - Again in a Side-by-Side trail it was my observation using the 20 Foot Grove Shortwave (SW) Pocket-Tenna -vice- 23 Foot Portable Reel {Roll-Up} Shortwave Antenna with a Grundig Satellit 800 Millennium Radio that the Grove had as good a signal with less noise then the Roll-Up. * Roll-Up connected via the Red HI-Z Terminal No-Ground. * Grove connected via the SO-239 LO-Z Jack No-Ground. THE QUESTIONS : ? Is the Grove a Great Shortwave Antenna ? -NO- ? For It's Intended Use - Does the Grove Antenna Work ? -YES- ? Is the Grove Worth $20 ? -YES and NO- -Yes- Price about Right for those who simply want to Buy It to Use. -No- Easy to Do-It-Yourself : If you have the Skills and Knowledge plus the Tools and Materials to build it. AGAIN THE [MY] BOTTOM LINE : The Grove Shortwave (SW) Pocket-Tenna http://www.grove-ent.com/pocket-tenna.html Simple enough to build-it-yourself to play around with and low cost enough to simply buy-it-and-try-it. - - - In , http://groups.yahoo.com/group/Shortw...a/message/9931 - - - "Greg W:-)" onegammyleg@... wrote: iane ~ RHF |
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