开云体育

I just got back from using my FT-857D and FC-40 in N. Maine on a canoe trip. I used the FT-857D on battery (with a 14W solar pannel) and the FC-40 connected to a random wire (~30-33m) most of the time only about 10-15m high. I was using a sling to string the wires up in the trees so I couldn't get too high. I also used about 25m of counterpoise running on the ground. I was able to get tuned fairly well on 20m and most of the time on 40m. 80m was generally a problem with the tuner as I got HSWR most of the time. I didn't think 33m was close enough to 1/2? (40m) for it to be a match problem on 80m. Does anyone know the range of impedences that the FC-40 can match? Another thing that I noticed is that on 80m my carrier would have practically little SWR but my voice modulation (LSB) would peak the SWR. I also had some complaints while QSOing across the Atlantic about QSB. This may be the becuase of the FT-857D sutting down due to HSWR peaks. I also tried using the FC-40 with a 5x10m vertical loop 2m off the ground. This had the same tuning characteristics. --jon

Hi everybody, I'm new to ham radio and plan to buy some equipment soon (Xmax's comming up ;-) I was thinking FT-857D and Buddipole; since many package-deals shave 50% off of a FC-40, I'm wondering if I can use it to fine-tune a dipole antenna. I gather there is a difference between balanced and un-balanced antennas; let me see if I get this straight: since solid-state transceivers feature unbalanced final stages, it is desireable to insert a balun between the radio and the dipole, which is a balanced antenna (I guess this is to avoid currents on the outer side of the coax cable). The FC-40's output is geared towards wire antennas and is probably un-balanced, right!? (1) Can you comment on the use of the FC-40 with a dipole antenna (and the Buddipole in particular). (2) How is the LDG Z11Pro tuner different from the FC-40. Your help is appreciated! Thanks, Wolf

Hi All, I refer to the FC-40 Control Cable which is just 5 meters long (abt. 16/17 feet). It is an 8 poles shielded cable straight wired, ended with 2x mini-Din8 plugs. I wonder how long can it be extended without to cause interferences/malfunctions to the FC-40 respectively to the FT857/897. Yaesu/Vertex don't say a word about it. I wonder if someone has done such an extension as well as where he found the extension cable (maybe in Mac "old" serial cables, unfortunately hard to find in EU), or perhaps just cutting the original cable and extending it by means of shielded connectors and a random lenght of shielded 8 poles cable? Many thanks in advance for any possible suggestion! I apologize for "my" english :o) Best 73 de Enrico - HB9FBN

I am using both the LDG "AT-897" and my FC-40 with three antennas and a control switch. Is anyone else doing the same? The control cable for the AT-897 is connected to the back of my FT- 897D in the usual manner at the radio's Antenna Tuner port and the control cable for the FC-40 is connected to the AT-897's auxilary Antenna Tuner port at the lower backside. I also have the auto-tune cable connecting my AT-897 to the ACC port on the back of the FT-897D. This makes tuning the AT-897 really simple: just push the button on the AT-897 for a few seconds, the red light on the turner turns on, and the radio goes into a transmit stage automatically while the AT-897 seeks a match. This is a great solution for 60 meters. The coax cables for my three antennas are connected to a three position switch, 1 is my "Cobra Junior", 2 is my FC-40 random wire, and 3 is a resonate 75 meter dipole. To use the antennas: Antenna 1: (a "Cobra Junior") - I switch the cable switch to the first position and depress the AT-897's tune button. Antenna 2: (a 93 foot wire connected to the FC-40) - I switch the antenna selector to the second position; Tap the button on the AT-897 once quickly, which shuts off the AT-897 and passes everything through like it's not there; then I touch the TUNE button on the FT-897D (menu k or the F1 programmable key on my MH-59). Antenna 3: (75 meter dipole) - I simply switch the antenna selector to the third position and depress the tune button on the AT-897 once quickly. No tuning is required. The only quirky thing that seems to happen is with the AT-897... evidently touching the tune button is a toggle and it's sometimes hard to know what position it's in. If I get a HSWR when tuning my FC-40, I have to flip over to my first antenna, tune it first with the AT-897 and then flip back to the FC-40 and shut off the AT-897 as I described earlier. There doesn't appear to be any loop issues and signal reports are excellent for all antennas although comparisons between my "Cobra Junior" and my FC-40 on 40 meters always favor my FC-40 by about 2 "S" units. Regards, Paul KA6GEM

Hi folks, I'm new round here I use an FT 897d and have recently come by an atas-25 (the manual version of an atas 120) I was wondering about feeding the atas-25 via the fc40 to avoid the manual tuning or am I just being plain silly! thanks in advance Best wishes, John MM1ANP

Any suggestions for removing RF on the control cable for the FC-40. I was unable to get the tuner to tune a long wire except for 80 meters. I installed dipoles for 40 through 15 meters. When I use the 15-meter dipole, the radio does funny things. I determined that there was RF coming in on the control cable. I have several chokes on cable and this does not seem to help. Any suggestions? I know that I really need to improve my grounding, but it is kind of hard when there is limestone and rock 3-inches below the dirt. Thanks and Happy New Year!

Just installed the Ft-857D, FC-40, Hustler bumper strap mount and 102" SS Whip in my truck. It works on all bands but 40 meters (high SWR) I have tried extra lenght of coax added to the supplied coax. I have added Ground cable from tuner to frame and still no luck.... I did put a 40 meter Ham Stick on it and it tuned it no problem. Any suggestions would be appreciated. Thanks Bob

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the YaesuTuner group. File : /AH-4 Graphical Wire Length Calculator 2.2.xls Uploaded by : kc9anq <kc9anq@...> Description : Use this to calculate what lengths to avoid when puting up a long wire. This spread sheet was made by W4TME for the Icom AH-4 tuner. Antenna theory is Antenna Theory so this will work for the Yaesu FC-40. Just read the directions and DO NOT USE THE LENGHTS LISTED IN GREY WHITE AND RED THOSE ARE THE AVOIDED LENGTHS, USE THE "WIRE WINDOWS" ON THE CHART! You can access this file at the URL: http://groups.yahoo.com/group/YaesuTuner/files/AH-4%20Graphical%20Wire%20Length%20Calculator%202.2.xls To learn more about file sharing for your group, please visit: http://help.yahoo.com/help/us/groups/files Regards, kc9anq <kc9anq@...>

The short answer is "High Current." Look at the AH-4 Graphical Wire Length Calculator in the files section of this group. Yes, the AH-4 is an Icom product, but it is the wire length that is important, not the brand of tuner. The file is in Xcel 2003. As is, it's set for dipole/long wire, but the constant is given for loops too. Plug in the constant for loops and AVOID the lengths shown on the chart. Try to find a length that has no data points on the graph. Remember to start long and trim slowly. http://groups.yahoo.com/group/YaesuTuner/files/ 73 Gary KC9DJQ

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the YaesuTuner group. File : /mh-59a8j.pdf Uploaded by : kc9anq <kc9anq@...> Description : The optional MH-59A8J Remote Microphone provides control of the major functions of the FT-897 from the microphone's keypad. The MH-59A8J includes a rotary control knob for adjust the operating frequency and receiver audio volume level. You can access this file at the URL: http://groups.yahoo.com/group/YaesuTuner/files/mh-59a8j.pdf To learn more about file sharing for your group, please visit: http://help.yahoo.com/help/us/groups/files Regards, kc9anq <kc9anq@...>

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the YaesuTuner group. File : /hamadf.exe Uploaded by : ab9lx <ab9lx@...> Description : Direct your beam. Enter your latitude and longitude and then just click the location your looking for and point the beam You can access this file at the URL: http://groups.yahoo.com/group/YaesuTuner/files/hamadf.exe To learn more about file sharing for your group, please visit: http://help.yahoo.com/help/us/groups/files Regards, ab9lx <ab9lx@...>

Hi folks, after moving to FINLAND where its very cold now, I put up a longwire loop of approx 84 metres of wire. Its fed with 300-ohms radioshack line. The tuner WON'T tune this on the lower bands (but its fantastic on 20m.) I'm going to try shortening the loop slightly to around 81m, but before that has anyone got any advice? Why is the SWR so high for the tuner? Antenna is about 5m up, and the feedline is about 4.5m. Ground here is solid granite rock... hence the loop! Cheers Clve4

http://ph.groups.yahoo.com/group/YaesuTuner/photos/browse/3625 photos posted. Will add better ones as soon as I can showing more detail, these are done in a 5mins break!

Dear all, I am just back from a vacation to 3B8, Mauritius and want to share my experience with the FC-40: I had a small bungaloo with space for an antenna and checked this in advance with the hotel. In the back there was an unused metal frame made of scaffolding tubes, about 10 by 15m in size, 3m high. I had a 12m tall fiberglass fishing rod like tower (SPIDERBEAM), which I fixed to one of the tubes. A wire ran from the top of the rod down to 1m above the ground, where the FC-40 was mounted. The metal frame gave a good earth counterpoise, however I laid out some 4 radials, between 20m and 5m long. Also found a metal waterpipe nearby which I also connected to one of the ground wires. Tuning the FC-40 was really a charm and done by pressing the TUNE button for 1 sec. I just had to do this once for the operating frequencies. Even in receive, the tuner follows the VFO. For tuning, the output power is automatically reduced to QRP, so you do not cause too much QRM and high voltages and currents in the tuner are avoided. The FC-40 did not find a match on 160m and 30m. I think the reasons were too low resistance for 160m, wire too short and too high for 30m, wire lenght close to lambda/2. On all other bands, the SWR at the TRX was nearly 1:1. I worked mostly 40m cw in the evenings and had great pile ups from Europe and JA, also VK and US. A sked with DL worked in SSB on 20m and 15m, reported true 59. Overall, I had 676 QSOs. The combination FC-40/FT-897 (FP-30 built in) and a fberglass pole is my favorite for travel. No need of finding supports for dipoles and you can QSY on the fly. I used a SGC-237 Smarttuner before and was not very lucky with it. It was hard to find a working wire length and the 237 intended to re-tune in the middle of a transmission, even if the SWR was fine. This is particularly not good if you transmit at 100W, it can destroy the tuner. This can be avoided with an external "SmartLock" circuit, but I think it should not be necessary. Also, the Smarttuner does not follow in RX mode, you have to transmit in order to tune and you better reduce the power while tuning! I hope this is informative, vy73, Jurgen, DJ5HD

I just found out my FC 30 tuner for my 857D will work with my FT100D as well as the FC20.Any one know what other yaesu auto tuners will work with these two radios other than the FC 40?

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the YaesuTuner group. File : /antennal.JPG Uploaded by : the_federalist_1787 <all_american82nd@...> Description : AMATEUR RADIO ANTENNA LENGTH CHART You can access this file at the URL: http://groups.yahoo.com/group/YaesuTuner/files/antennal.JPG To learn more about file sharing for your group, please visit: http://help.yahoo.com/help/us/groups/files Regards, the_federalist_1787 <all_american82nd@...>

I am looking for a clean,near-new condition FC-40 remote tuner. I have sold mine in a recent trade-in and miss it a lot. Maybe someone got one in the recent promotion and dont plan to use it ? Let me know what you have.Can pay via Paypal. Thanks for reading, Dave VA2DV

The local dealer finally got my money for a new one. Now it's time to play with some wires. Thanks to all, Dave VA2DV

I installed the FC-40 in my truck after getting it at Orlando, the 857D had been in the truck for several months. Installation went OK, tuner seemed to tune OK on all bands from 60M down. A few weeks ago the radio suddenly quit transmitting, no bar indication. Receive was OK. Checked 2M with wattmeter, no output, antenna analyzer said 2M antenna was OK. Sent radio back to Yaesu, came back today. Hooked it up, didn't work. Played with 2M antenna, it worked, then didn't work. Discovered that when I unplugged the control cable from the back of the radio, the radio would work. Plug it back in, the radio would not work. Tried tuning up on 20M, had high SWR. Unplugged cable, radio would work. Has anyone else had this problem? Dave, NJ4F

Hi Group I have a 80ft delta loop however my tuner cant reach it as the control cable is only 16 ft long. Could I feed the corner of my delta loop from the tuner using some ladderline ? Any help / advice would be appreciated.. Syd MI5UTC