10 meter operations
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Jim, Thank you for your great write-up!? I'm glad the 10 Meter Net has helped inspire you to play along and solve any issues on your station that have arose.? Others had never tried these modes with their particular radio so it has proven very beneficial to all ranges of hams at different expertise levels.? Thank you for joining in on the radio fun and hope to hear you on the air Thursday! Thank you, ?KK7CJV Stacy
On Monday, January 13, 2025 at 08:37:50 PM GMT-7, Jim WA7MKN via groups.io <jim.drummond@...> wrote:
I thought I should share this with the group.??
A couple of years ago I switched from an older Kenwood HF to a new Icom 7300 which has many more bells, whistles and functions that I don't understand. I'm not very active and the past couple of months when I turned on the rig I have had trouble with SWR and
effective HF operations. I assumed that I had external tuner? component corrosion or an antenna problem. I use a G5RW dipole which is a hearty multiband antenna that takes up 103 feet between end mounts and is good for 6 to 80 meters with a good antenna tuner.
My "go to" external antenna tuner is an MFJ 948 which allowed me to load all bands on the G5RV with low SWR. When I bought the 7300, I also bought an ADG AT 100 auto tuner for a try.? The MFJ 948 manual tuner still significantly outperformed the ADG auto tuner,
so the ADG is sitting on a shelf.
The last couple of weeks I spent some of time checking? my antenna and feedlines so that I could get on 10 meters for your popup net, but the best forward power I could get was 10 watts out.? I could get up to 50 watts out on a couple of other bands, but I
have a 100-watt radio, and I knew I that had a problem.?
I went over my G5RV section by section, redid connectors and finally cleaned all the conductors and capacitors in the MFJ tuner. I still had low RF output and high SWR.? Finally I started looking at Utube videos about Icom IC 7300's. I have only had the radio
a couple of years, don't operate often and am not very familiar with all the quirks, so thank goodness for Utube. After a couple of videos I decided that I had bad final transistors that should be replaced. Apparently the Icom 7300 has a problem with failing
finals.??
Before I ordered 2 new transistors at $40 each or boxed up the radio to send to Icom for service, I thought it prudent to read the manual.? Low and behold, it had a brief paragraph instructing users to make sure that the internal antenna tuner (a feature on
a 7300)? is turned off before using an external antenna tuner.? Yup, my internal antenna tuner icon in the upper left corner of the display was "on" (apparently a default setting).? According to the manual, If the internal tuner is on and an external antenna
tuner is applied, they fight with each other.?
I turned the internal tuner off, went through all the bands tuning with the MFJ? 948 from 75 meters to 6 meters, and have 100 watts forward and SWR's of 1.1/1 on all bands.? I had a couple of nice contacts on 10 meters yesterday with good signal reports.?
Lessons that I learned:
-Read the manual first?
-The more I use a G5RV antenna with a tuner, the better I like it.?
-Having a local group of younger hams getting excited about ham radio can motivate an old guy to dust the cobwebs off the radio.? Thank you!
I hope to check in Thursday with 100 watts.? Jim WA7MKN
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Result at the Flaherty house during 1/16/2025 7:00 p.m. local time on 28.355+/- for 10 meter net.
Eton Elite Executive radio did not receive, unlike last week's performance.
Yaesu FT-891, used for POTA, was used for this meeting indoors with ATAS 120 antenna.?
Antenna was grounded by copper stake outdoors.
CONS: Weak signal and poor intelligibility.
PROS:? Re-learned how to change from LSB to USB (this time, I saved my notes!) and learned for first time how to change from enabled FM to disabled FM.
In sum, an excellent learning experience!
Thank you, Stacy and Eric, for scheduling this.
Carol B Flaherty KA7ROL and Patrick M Flaherty KK7KGP |
开云体育Good day everyone Dennis W7DVN hereI have a Heathkit hw101 and it needs a new home comes with speaker and microphone.? It needs a new Drive preselactor. I don’t have time or the place (space) to repair it? I live in Big sky (canyon) I’m wanting to give it to someone who will fix and use it for free this radio needs a loving Amateur Radio operator to adopt it and give it a new home? 406 580 zero zero thirty four Den-? ? On Jan 17, 2025, at 12:51?PM, Lee k7nm via groups.io <leejudybarrett@...> wrote:
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Stacy KK7CJV
Carol KA7ROL
Dennis w7dvn