| Home |
| Search |
| Today's Posts |
|
|
|
#1
January 27th 08, 12:55 AM
posted to rec.radio.shortwave
|
|||
|
|||
Antenna Pre-amps MFJ 1020C
Do a lot of travelling and like to cruise the SW bands etc. Anyone use or
have any comments on the MFJ-1020C indoor active antenna preamp? Performance? Bands etc.? Thanks Using an ICOM R-20 Communications Reciever =-= |
|
#2
January 27th 08, 01:18 AM
posted to rec.radio.shortwave
|
|||
|
|||
|
Antenna Pre-amps MFJ 1020C
Dear Mr. Green,
I own the original MFJ-1020 and the later MFJ-1020B. Both are adequate - no more - when used indoors with the short whip antenna. If you are able to attach 20 feet - any more and you'll overload it - of insulated wire to the back via the RCA jack and can run that wire outside, the performance will improve greatly. The trouble, of course, when traveling, is that you have to open a window (not always possibly in a hotel) to run the wire outside. It might be worth a try, however, as it is not too expensive. Personally, however, I would recommend trying a Sony AN-LP1 Active Antenna for about the same price. Unfortunately that antenna is available only from a Japanese eBay dealer called Buy From Japan. I do understand, however, that he is extremely reliable and ships very quickly. (I personally have never dealt with him.) Best, Joe On Jan 26, 7:55 pm, "sdgreen" wrote: Do a lot of traveling and like to cruise the SW bands etc. Anyone use or have any comments on the MFJ-1020C indoor active antenna preamp? Performance? Bands etc.? Thanks Using an ICOM R-20 Communications Receiver |
|
#3
January 27th 08, 12:50 PM
posted to rec.radio.shortwave
|
|||
|
|||
|
What About Scanner Reciever Antennas for Shortwave Radio Listening(SWL)
On Jan 26, 4:55 pm, "sdgreen" wrote:
- - Do a lot of travelling and like to cruise the SW bands etc. - Anyone use or have any comments on the MFJ-1020C - indoor active antenna preamp? - - Performance? Bands etc.? - - Thanks - - Using an ICOM R-20 Communications Reciever - - =-= - What About Scanner Reciever Antennas for Shortwave Radio Listening (SWL) - [Was : Antenna Pre-amps MFJ 1020C] - "sdgreen" Icom R-20 Communications Receiver {Handheld Scanner} http://www.icomamerica.com/en/produc...0/default.aspx Icom R-20 Communications Scanning Receiver {Handheld} eHAM REVIEWS - http://www.eham.net/reviews/detail/4317 The Icom IC-R20 Scanner is Shortwave to Microwave http://www.strongsignals.net/access/...rr_ic-r20.html Wideband Coverage : LW + AM/MW + SW/HF + VFH + UHF/FM +++ Modes : AM + SSB + CW + FM + WFM Receiver System : Triple Conversion SuperHeterodyne Antenna Impedance : 50 Ohms Antenna Connection : BNC Jack Standard Antenna : 23 Inch Whip Antenna with BNC Base Icom IC-R20 Wideband "Scanner" Receiver http://www.universal-radio.com/catal...rxvr/0020.html REPORT - ICOM IC-R20 Wideband Scanner Receiver http://www.monitoringtimes.com/html/mtscan1104.pdf -by- Bob Parnass [AJ9S] - Monitoring Times FIRST - IMHO - You Do Not Need a MFJ-1020 Active Antenna for the Icom IC-R20 Wideband Scanner Receiver. WHAT YOU DO NEED IS : A Better-Bigger-Longer Antenna Passive Antennas that will Capture and Deliver more Signal without Overloading your Scanning Receiver. READ - Many Scanner Radio Problems Can Be "Fixed" With A Better Scanner Antenna http://groups.google.com/group/rec.r...5613952dbf2d65 * "Snoop" Scanner Antenna * 24" Big Daddy "Snoop" Scanner Antenna * Scanner Window Mount Antenna * 48 Inch Grove "Flex-Tenna" Model VU # ANT46 * Car Magnet Mount Mini-Mobile Wide-Band Scanner Antenna with a BNC Connector. READ - Simple Snake Antenna for the Shortwave (HF) Band for Scanners made from a single piece of Coax Cable should work with out overloading the Scanning Receiver. http://groups.google.com/group/rec.r...0c9dfd1a8b21a2 Snake Antenna - Antenna Construction Steps Or simply 'modify' the Workman SCAN4 Wire Scanner Antenna http://www.universal-radio.com/catal...ants/1820.html into a smaller Snake Antenna by Removing a total of 3 Feet of the Outer Insulation and Coax Shield and Exposing the Inner Insulator and Center Conductor. Compact (6 Ft) and Portable. READ - Antennas for a WideBand {Scanner} Receiver http://groups.google.com/group/rec.r...92cd087ae7b7e1 Check-Out these Scanner Antennas : * WPN-97 Nomad Portable Antenna http://www.scannermaster.com/Nomad_A.../25-541079.htm * WAN-97A Active Nomad Base Antenna http://www.scannermaster.com/WAN_97A.../28-541171.htm * Workman SCAN4 Window Wire Scanner Antenna http://www.universal-radio.com/catal...ants/1820.html * RadioMaster P-30 Passive WideBand Antenna http://www.universal-radio.com/catalog/sw_ant/1331.html DO-It-Yourself - Build a "T" Antenna for your Scanner using an FM Folded Dipole Antenna and a BNC Connector. * Basic FM Folded Dipole "T" Antenna {300 Ohm Twin Lead} http://www.kyes.com/antenna/antennatypes/twinlead.jpg http://en.wikipedia.org/wiki/Dipole_antenna http://www.universal-radio.com/catalog/misc/1268.html http://www.universal-radio.com/catalog/mwant/3239.html * BNC Coax Cable type Connector http://www.universal-radio.com/catal...s/bncconn.html -Note- The Top is about 60 Inches Tip-to-Tip with a 72 Inch feed-in-line. -Tip- Can be Mounted Horizontal, Vertically or on a Diagonal usually across or near a Window. -Three Alternatives- Buy It Ready-Made : * "Super Dipole Scanner Antenna" SDSA - http://cgi.ebay.com/_W0QQitemZ150209493857 * "Reflex Snooper" Folded Dipole Scanner Antenna http://cgi.ebay.com/_W0QQitemZ270204016912 * "Big Reflex Snooper" Folded Dipole Scanner Antenna http://cgi.ebay.com/_W0QQitemZ280192691192 READ - The Simplest Shortwave Listener (SWL) Antennas That I Know Of..." It Is The FM Folded Dipole Antenna. http://groups.google.com/group/rec.r...bed3e059ec70a3 hope this helps - iane ~ RHF {pomkia} |
|
#4
January 28th 08, 07:30 AM
posted to rec.radio.shortwave
|
|||
|
|||
|
What About Scanner Reciever Antennas for Shortwave Radio Listening (SWL)
Thanks RHF! Excuse the top posting, but your information is utterly
magnificent...kudos. My thought on the MFJ 1020C active pre-amp is that such is self contained, easy to pack, has the appropriate controls, comes with a vertical telescoping mast 50+ inches and looks like it would be easy to setup and use. Wires are nice, but messy on luggage and sometimes airport security get curious. So the question is does the MFJ 1020C do the job. ======================= "RHF" wrote in message ... On Jan 26, 4:55 pm, "sdgreen" wrote: - - Do a lot of travelling and like to cruise the SW bands etc. - Anyone use or have any comments on the MFJ-1020C - indoor active antenna preamp? - - Performance? Bands etc.? - - Thanks - - Using an ICOM R-20 Communications Reciever - - =-= - What About Scanner Reciever Antennas for Shortwave Radio Listening (SWL) - [Was : Antenna Pre-amps MFJ 1020C] - "sdgreen" Icom R-20 Communications Receiver {Handheld Scanner} http://www.icomamerica.com/en/produc...0/default.aspx Icom R-20 Communications Scanning Receiver {Handheld} eHAM REVIEWS - http://www.eham.net/reviews/detail/4317 The Icom IC-R20 Scanner is Shortwave to Microwave http://www.strongsignals.net/access/...rr_ic-r20.html Wideband Coverage : LW + AM/MW + SW/HF + VFH + UHF/FM +++ Modes : AM + SSB + CW + FM + WFM Receiver System : Triple Conversion SuperHeterodyne Antenna Impedance : 50 Ohms Antenna Connection : BNC Jack Standard Antenna : 23 Inch Whip Antenna with BNC Base Icom IC-R20 Wideband "Scanner" Receiver http://www.universal-radio.com/catal...rxvr/0020.html REPORT - ICOM IC-R20 Wideband Scanner Receiver http://www.monitoringtimes.com/html/mtscan1104.pdf -by- Bob Parnass [AJ9S] - Monitoring Times FIRST - IMHO - You Do Not Need a MFJ-1020 Active Antenna for the Icom IC-R20 Wideband Scanner Receiver. WHAT YOU DO NEED IS : A Better-Bigger-Longer Antenna Passive Antennas that will Capture and Deliver more Signal without Overloading your Scanning Receiver. READ - Many Scanner Radio Problems Can Be "Fixed" With A Better Scanner Antenna http://groups.google.com/group/rec.r...5613952dbf2d65 * "Snoop" Scanner Antenna * 24" Big Daddy "Snoop" Scanner Antenna * Scanner Window Mount Antenna * 48 Inch Grove "Flex-Tenna" Model VU # ANT46 * Car Magnet Mount Mini-Mobile Wide-Band Scanner Antenna with a BNC Connector. READ - Simple Snake Antenna for the Shortwave (HF) Band for Scanners made from a single piece of Coax Cable should work with out overloading the Scanning Receiver. http://groups.google.com/group/rec.r...0c9dfd1a8b21a2 Snake Antenna - Antenna Construction Steps Or simply 'modify' the Workman SCAN4 Wire Scanner Antenna http://www.universal-radio.com/catal...ants/1820.html into a smaller Snake Antenna by Removing a total of 3 Feet of the Outer Insulation and Coax Shield and Exposing the Inner Insulator and Center Conductor. Compact (6 Ft) and Portable. READ - Antennas for a WideBand {Scanner} Receiver http://groups.google.com/group/rec.r...92cd087ae7b7e1 Check-Out these Scanner Antennas : * WPN-97 Nomad Portable Antenna http://www.scannermaster.com/Nomad_A.../25-541079.htm * WAN-97A Active Nomad Base Antenna http://www.scannermaster.com/WAN_97A.../28-541171.htm * Workman SCAN4 Window Wire Scanner Antenna http://www.universal-radio.com/catal...ants/1820.html * RadioMaster P-30 Passive WideBand Antenna http://www.universal-radio.com/catalog/sw_ant/1331.html DO-It-Yourself - Build a "T" Antenna for your Scanner using an FM Folded Dipole Antenna and a BNC Connector. * Basic FM Folded Dipole "T" Antenna {300 Ohm Twin Lead} http://www.kyes.com/antenna/antennatypes/twinlead.jpg http://en.wikipedia.org/wiki/Dipole_antenna http://www.universal-radio.com/catalog/misc/1268.html http://www.universal-radio.com/catalog/mwant/3239.html * BNC Coax Cable type Connector http://www.universal-radio.com/catal...s/bncconn.html -Note- The Top is about 60 Inches Tip-to-Tip with a 72 Inch feed-in-line. -Tip- Can be Mounted Horizontal, Vertically or on a Diagonal usually across or near a Window. -Three Alternatives- Buy It Ready-Made : * "Super Dipole Scanner Antenna" SDSA - http://cgi.ebay.com/_W0QQitemZ150209493857 * "Reflex Snooper" Folded Dipole Scanner Antenna http://cgi.ebay.com/_W0QQitemZ270204016912 * "Big Reflex Snooper" Folded Dipole Scanner Antenna http://cgi.ebay.com/_W0QQitemZ280192691192 READ - The Simplest Shortwave Listener (SWL) Antennas That I Know Of..." It Is The FM Folded Dipole Antenna. http://groups.google.com/group/rec.r...bed3e059ec70a3 hope this helps - iane ~ RHF {pomkia} |
|
#5
January 28th 08, 08:22 AM
posted to rec.radio.shortwave
|
|||
|
|||
|
Wide-Band Scanner Receivers -and- Wide-Band Active Antennas = Synergy& Utility
On Jan 27, 11:30*pm, "sdgreen" wrote:
- - Thanks RHF! *Excuse the top posting, but your information - is utterly magnificent...kudos. - - My thought on the MFJ 1020C active pre-amp is that such - is self contained, easy to pack, has the appropriate controls, - comes with a vertical telescoping mast 50+ inches and looks - like it would be easy to setup and use. - - Wires are nice, but messy on luggage and sometimes - airport security get curious. - - So the question is does the MFJ 1020C do the job. - - ======================= SD GREEN, Yes the MFJ-1020C could "Do The Job" as you have defined it. You have an RF Gain Control and Attenuator built into the Icom IC-R20 and a Gain Control built into the MFJ-1020C. Active Antenna Signal Overload - Back-Off on them to reduce and prevent any Signal Overload of the Radio. Remember - That you have to Tune both the Radio and the Active Antenna to the same Frequency to use them properly. Wide-Band Scanner Receivers -and- Wide-Band Active Antennas - = Synergy & Utility = - TIP - With a Scanning Wideband Radio you may find a Wideband Active Antenna the better 'choice' versus an Active Antenna that you will be Required to Re-Tune with each Frequency change. Two Wide-Band Active Antennas : You may want to consider the MFJ-1022 Wideband Active http://www.universal-radio.com/catalog/sw_ant/3109.html Indoor Receiving Antenna : Coverage 300 kHz to 200 MHz * Small Compact and Designed to be used Indoors * "No" Tuning Required * Adjust the Radio's RF Gain Control and Attenuator to reduce and prevent Signal Overload Another 'alternative' is the Kaito KA35 Active MW/SW Antenna http://www.universal-radio.com/catalog/sw_ant/4835.html http://cgi.ebay.com/_W0QQitemZ250194482431 * Small Compact and Designed to be used Indoors * "No" Tuning Required * Adjust the Radio's RF Gain Control and Attenuator to reduce and prevent Signal Overload + Two Antenna Elements Coverage : 100 kHz to 30 MHz + + AM/MW Ferrite Rod {Directional} LW+MW+SW3MHz + + Shortwave Whip {Non-Directional} SW 3MHz~ 30 MHz -ps- Telamon be sure to count this as another one of my 'clueless posts' with plenty of : cut, copy, and paste variety |
|
#6
January 28th 08, 06:02 PM
posted to rec.radio.shortwave
|
|||
|
|||
|
Wide-Band Scanner Receivers -and- Wide-Band Active Antennas = Synergy & Utility
"RHF" wrote in message ... On Jan 27, 11:30 pm, "sdgreen" wrote: - - Thanks RHF! Excuse the top posting, but your information - is utterly magnificent...kudos. - - My thought on the MFJ 1020C active pre-amp is that such - is self contained, easy to pack, has the appropriate controls, - comes with a vertical telescoping mast 50+ inches and looks - like it would be easy to setup and use. - - Wires are nice, but messy on luggage and sometimes - airport security get curious. - - So the question is does the MFJ 1020C do the job. - - ======================= SD GREEN, Yes the MFJ-1020C could "Do The Job" as you have defined it. You have an RF Gain Control and Attenuator built into the Icom IC-R20 and a Gain Control built into the MFJ-1020C. Active Antenna Signal Overload - Back-Off on them to reduce and prevent any Signal Overload of the Radio. Remember - That you have to Tune both the Radio and the Active Antenna to the same Frequency to use them properly. Wide-Band Scanner Receivers -and- Wide-Band Active Antennas - = Synergy & Utility = - TIP - With a Scanning Wideband Radio you may find a Wideband Active Antenna the better 'choice' versus an Active Antenna that you will be Required to Re-Tune with each Frequency change. Two Wide-Band Active Antennas : You may want to consider the MFJ-1022 Wideband Active http://www.universal-radio.com/catalog/sw_ant/3109.html Indoor Receiving Antenna : Coverage 300 kHz to 200 MHz * Small Compact and Designed to be used Indoors * "No" Tuning Required * Adjust the Radio's RF Gain Control and Attenuator to reduce and prevent Signal Overload Another 'alternative' is the Kaito KA35 Active MW/SW Antenna http://www.universal-radio.com/catalog/sw_ant/4835.html http://cgi.ebay.com/_W0QQitemZ250194482431 * Small Compact and Designed to be used Indoors * "No" Tuning Required * Adjust the Radio's RF Gain Control and Attenuator to reduce and prevent Signal Overload + Two Antenna Elements Coverage : 100 kHz to 30 MHz + + AM/MW Ferrite Rod {Directional} LW+MW+SW3MHz + + Shortwave Whip {Non-Directional} SW 3MHz~ 30 MHz =================================== Thanks RHF. I looked at the options you suggested, but I rather fancy using the various adjustments to fine tune the signal. The IC-20 does have satisfactory controls to tailor the signal. For my purpose, the IC-20 performs quite adequately and much, much better than either my Eton 10 /100 or my Grundig 400. SSB is especially outstanding. It was a toss up between the IC-20 or the AOR 8300. In the end, battery life was the deciding factor. === |
|
#7
February 8th 08, 06:29 AM
posted to rec.radio.shortwave
|
|||
|
|||
|
Wide-Band Scanner Receivers -and- Wide-Band Active Antennas =Synergy & Utility
On Jan 28, 12:22*am, RHF wrote:
On Jan 27, 11:30*pm, "sdgreen" wrote: - - Thanks RHF! *Excuse the top posting, but your information - is utterly magnificent...kudos. - - My thought on the MFJ 1020C active pre-amp is that such - is self contained, easy to pack, has the appropriate controls, - comes with a vertical telescoping mast 50+ inches and looks - like it would be easy to setup and use. - - Wires are nice, but messy on luggage and sometimes - airport security get curious. - - So the question is does the MFJ 1020C do the job. - - ======================= SD GREEN, Yes the MFJ-1020C could "Do The Job" as you have defined it. You have an RF Gain Control and Attenuator built into the Icom IC-R20 and a Gain Control built into the MFJ-1020C. Active Antenna Signal Overload - Back-Off on them to reduce and prevent any Signal Overload of the Radio. Remember - That you have to Tune both the Radio and the Active Antenna to the same Frequency to use them properly. Wide-Band Scanner Receivers -and- Wide-Band Active Antennas - = Synergy & Utility = - TIP - With a Scanning Wideband Radio you may find a Wideband Active Antenna the better 'choice' versus an Active Antenna that you will be Required to Re-Tune with each Frequency change. Two Wide-Band Active Antennas : You may want to consider the MFJ-1022 Wideband Activehttp://www.universal-radio.com/catalog/sw_ant/3109.html Indoor Receiving Antenna : Coverage 300 kHz to 200 MHz * Small Compact and Designed to be used Indoors * "No" Tuning Required * Adjust the Radio's RF Gain Control and Attenuator to reduce and prevent Signal Overload Another 'alternative' is the Kaito KA35 Active MW/SW Antennahttp://www.universal-radio.com/catalog/sw_ant/4835.htmlhttp://cgi.ebay.com/_W0QQitemZ250194482431 * Small Compact and Designed to be used Indoors * "No" Tuning Required * Adjust the Radio's RF Gain Control and Attenuator to reduce and prevent Signal Overload + Two Antenna Elements Coverage : 100 kHz to 30 MHz + + AM/MW Ferrite Rod {Directional} LW+MW+SW3MHz + + Shortwave Whip {Non-Directional} SW 3MHz~ 30 MHz -ps- Telamon be sure to count this as another one of my 'clueless posts' with plenty of : cut, copy, and paste variety *. *. again hope this helps - iane ~ RHF *{pomkia} *. Shortwave Listener (SWL) Antennas Group =http://tinyurl.com/ogvcf GoTo =http://groups.yahoo.com/group/Shortwave-SWL-Antenna/ The SWL Antenna Discussion Group =http://tinyurl.com/ogvcf Shortwave Listener (SWL) Antenna HELP =http://tinyurl.com/ogvcf Shortwave Listener (SWL) Antenna NEWS =http://tinyurl.com/ogvcf Shortwave Listener (SWL) Antenna INFO =http://tinyurl.com/ogvcf * * * All Are Welcome : Including ELMERS and 'Want-to-be-Elmers' plus plain old "Mister-Know-It-Alls"; and even those Newbees with "I Know This Is A Really Dumb Question - But _ _ _ _ _ _ _ _ " *. Shortwave Radio Listener QSL Reports News & Info Grouphttp://groups.google..com/group/shortwave-listener-qsl-reports Read & Post Your Shortwave Listener (SWL) Reception Reports SWL-QSL-REPORTS =http://tinyurl.com/3awlyr *. The Shortwave Listener's Blessing : SWL BLESSING =http://tinyurl.com/s2bjm May You Never Tire of Listening to the Radio and Always have Strong Signals and Noise Free Reception ~ RHF {ibid}http://groups.yahoo.com/group/Shortw...a/message/9233 *. Tous Sont Bienvenus ! - - - Groupe par Radio d'auditeur d'onde courte pour des Antennes de SWLhttp://groups.yahoo.com/group/Shortwave-SWL-Antenna/ *. Alle Sind Willkommen ! - - - Shortwave Radiozuhörer Gruppe für SWL Antennenhttp://groups.yahoo.com/group/Shortwave-SWL-Antenna/ *. Tutti Sono Benvenuti ! - - - Gruppo Radiofonico dell'ascoltatore di onda corta per le Antenne di SWLhttp://groups.yahoo.com/group/Shortwave-SWL-Antenna/ *. Todos São Bem-vindos ! - - - Grupo de Rádio do ouvinte do Shortwave para Antenas de SWLhttp://groups.yahoo.com/group/Shortwave-SWL-Antenna/ *. ¡Todos Son Agradables! - - - Grupo de Radio del oyente de la onda corta para las Antenas de SWLhttp://groups.yahoo.com/group/Shortwave-SWL-Antenna/ *. = = = = Plain Old American-English Translation = = = = All are Welcome - - - To Join the Shortwave Listeners (SWL) Antenna Group on YAHOO !http://groups.yahoo.com/group/Shortwave-SWL-Antenna/ *. *| *| *| / \ .......!....... Telamon, This Message and Thread Needed both Your Vast Knowledge and Great Expertise. but alas you were once again 'mia' ~ RHF -ps- that's 11 for me and 0 for you |
|
#8
January 27th 08, 02:14 PM
posted to rec.radio.shortwave
|
|||
|
|||
|
Antenna Pre-amps MFJ 1020C
On Jan 26, 7:55*pm, "sdgreen" wrote:
Do a lot of travelling and like to cruise the SW bands etc. Anyone use or have any comments on the MFJ-1020C indoor active antenna preamp? Performance? Bands etc.? Thanks Using an ICOM R-20 Communications Reciever =-= the r20 isn't going to be able to take much of an antenna w/out overloading badly on hf. it simply wasn't designed for that sorta thing. i've had my r20 overload before on the hf bands with only a sangean an-60 reel-out wire on the upside, you can back off the gain with the mfj unit. much better off taking that money & putting it toward a Kaito/Degen 1103 for your hf listening, or spending more & getting an icf-sw7600GR for hf. |
| Reply |
| Thread Tools | Search this Thread |
| Display Modes | |
|
|
Similar Threads
|
||||
| Thread | Forum | |||
| FS LGC Wireless AMPS Fiberoptic/CAT5 BDA RF Remote Antenna Unit DAS8A-4 | Swap | |||
| MFJ 1045C Preselector....oh, and the 1020C, too. | Shortwave | |||
| FS: MFJ-1020C | Shortwave | |||
| your opinion on the MFJ-1020C active antenna | Shortwave | |||
| amps | CB | |||
Hybrid Mode
