Martin's Site
  • Home
  • Ham Radio - K0BXB
    • Logging Contacts
    • The Shack
    • Operating Modes >
      • WSJT-X/FT8
      • DMR
      • D-STAR
      • Ultra Portable PSK/Digital
    • Antennas >
      • Comparing Antennas
      • The Artifically intelligent Antenna
      • Magnet Loop >
        • Mag Loop Overview
      • Portable Antennas >
        • 2 Meter Portable J-pole
        • Five Portable Antennas
        • End Fed Antennas >
          • End Fed Half Wave Antenna >
            • EFHW Summary
          • 29/35 foot end fed wire >
            • Balun or no Balun
          • 51 Foot End Fed Wire
          • 84 Foot End Fed Multi-band Antenna
        • Vertical Antennas >
          • Nine Foot Portable Vertical
          • Short Verticals >
            • DIY 40m -10m Short Vertical Antenna
            • QRPGuys DS1 40m -10m Antenna
            • Pac 12 Portable Vertical Antenna
            • Spiral Wound Vertical
          • 1/4 wavel 20 meter Veritcal >
            • DIY 6 Band Vertical
            • Make a KW4JM vertical
          • QRPGuys 3 Band Vertical
          • Silver Bullet 1000 TIA
          • Portable 17 ft. wire vertical
        • Other Portable Antenna Options
      • Dipoles/Inverted VEEs >
        • Off Center Fed Dipole OCD
        • Comparing the Trap vs. Fan Inverted Vee
        • Link Inverted Vee
        • Trap Antennas >
          • 20 & 40 meter trap dipole qrpkits
          • 40/20 Meter Trap-Inverted Vee
          • 17/20/30/40 Trap Inverted Vee
        • 40/20 Fan-Inverted Vee
        • 40 Meter Inverted Vee
        • G5RV
      • Base Station and General Antennas >
        • G5RV
      • Portable Masts
      • Antenna Test Gear >
        • NanoVNA
        • X5105 Antenna Analyzer
        • Field Strength Meter
    • Radios >
      • IC-705
      • IC-7300
      • XIEGU G90 >
        • G90 Go Kit
      • X5105 >
        • x5105 Go Kit
        • QRP (x5105) Statistics
        • Repairing Mic Cord
      • QRPLabs QCX Transceiver
      • Ten-Tec R4020 QRP Transceiver
    • Portable HF.... >
      • Pedestrian Mobile >
        • Ped Mobile Considerations
      • POTA - Parks On The Air >
        • Thots on POTA Activations
        • My Ideal POTA Kit
        • POTA - Lizard Mound State Park k-9704
        • POTA k-3383 Bald Mtn State Rec Area
        • POTA k-2314 Pine Lake State Park
        • POTA K-4429 Coronado National Forest
        • POTA K-4491 Superior Nat. Forest
        • POTA K-1440 Big Foot
        • POTA K-4265 Bong
        • POTA K-1437 Aztalan State Park
        • POTA - Ice Age Scenic trail K-4238
      • Ham Radio Field Days >
        • 2021 Field Day
        • 2021 Winter Field Day
        • 2020 Field Day
        • 2020 Winter Field Day-
        • 2019 Field Day
        • 2018 Field Day
        • 2016 Field Day
        • 2015 Field Day
      • 2020 Portable Ops
      • Thoughts on Portable Operating
      • Thoughts on Operating QRP/Portable
      • Portable Power
      • Portable CW Keys
      • Tuner/Matchbox >
        • ELECRAFT T1
        • Tuna Tunah II
        • EMTECH ZM-2 ATU
    • Going Mobile HF & VHF >
      • 2020 Mobile Installation
      • 2015 Re-install the Mobile
    • Miscellaneous Ham Radio Topics >
      • Baluns, Ununs, Etc.
      • Keeping wires and ropes untangled
      • Helping Others
      • Things Happen
  • Backpacking/Camping
    • 2020 Backpacking/Camping Season >
      • 2020 Oct Boundary Waters Trip
      • July 2020 Koehler-Andrea St. Park Birthday Camping Trip
    • 2019 Backpacking/Camping Season >
      • September 2019 High Sierra Camp Loop
      • August 2019
      • June 2019 Boundary Waters
    • 2018 Backpacking/Camping Season >
      • Oct 2018 Boundary waters
      • August 4-5, 2018 Wisconsin River Canoe Trip
      • July 16-18 Devil's Lake Birthday Campout
      • June 28-30, 2018 Backpacking/Camping
      • June 2018 ARRL Field Day Camput
      • April 2017 Ice Age National Scenic Trail
    • 2017 Backpacking/Camping Season >
      • July 2017 Camping at Timber-Lee Christian Campground
      • Cancelled Ice Age Trail Backpacking Trip
      • June 2017 Hiking/Backpacking/Camping >
        • Cave of the Mounds and Blue Mounds State Park
      • May 2017 Backpacking/Hiking/Camping >
        • May 19 Ottawa Lakes Campground
        • May 4-7 2017 Porkies Backpacking Trip >
          • Porkies Backpack Trip Day 1
          • Porkies Backpack Trip Day 2
          • Porkies Backpack Trip Day 3
          • Porkies Backpack Trip Day 4
      • April 2017 Backpacking/Camping/Hiking
      • March 2017 Hiking/Camping More Preparations
      • Feb 2017 Hiking/Camping
    • 2016 Hiking/Backpacking/Camping Season >
      • December 2016 Hiking/Camping
      • November 2016 Hiking/Camping
      • Oct 2016 Boundary Waters Canoe Area Trip
      • August 2016 Camping
      • July 2016 Hiking/Camping/Backpacking
      • June 2016 Hiking/Backpacking/Camping
      • May 2016
      • April 2016
    • Shelters >
      • Tents >
        • Reparing Tent Poles
      • Hammocks >
        • Hammock Stand >
          • Portable Hammock Stand
        • SnakeSkins or Sleeves vs. Stuff Sacks
        • Hammock Suspension
        • Keeping Warm in a Hammock >
          • Lite Top Quilt or Bag Liner
          • DIY Under Quilt
    • Glacier National Park 2015
    • Training for Glacier National Park Backpacking Trip
    • Backpacking Stoves >
      • Trangia 27-3 UL Stove >
        • Cooking with Trangia
        • ALOCS Trangia Look Alike Burner
      • Fancee Feest Stove >
        • Fancee Feest & Stanley Cook Pot
        • Another Cat Food Can Stove
      • DIY Alcohol Stove
      • DIY Igniter for Alcohol Stoves
      • Lexada Wood-Gas Stove
      • Wood Burning Backpack Stoves >
        • Emberlit Fireant
      • Gas Cannister Stoves
    • Backpacking Food >
      • Cowboy Coffee
      • Santa Fe Cheesy Beans and Rice
      • Healthy Instant Oatmeal Packets
      • Bacon Ranch Chicken Wrap
    • Other Gear
  • Adventures
    • 50th Anniversary In Alaska >
      • Day 1 Sites in Fairbanks
      • Day 2 Morning River Boat Cruise
      • Day 2 Afternoon travel to Denali
      • Day 3 Denali History Bus Tour >
        • McKinley Wilderness Princess Lodge Photos
      • Day 4 Coach ride to Anchorage/Whittier
      • Day 5 Ship Cruise at Yakutat Bay and Hubbard Glacier >
        • Photos of Yakutat Bay
      • Day 6 Galcier Bay
  • RC Planes
    • 2019 Flying Season
    • 2018 Flying Season
    • 2017 Flying Season
    • 2016 Flying Season
    • 2015 Flying Season
    • Great Planes Escapade - .40 size
    • T-6 Texan
    • Cessna 170
    • Fokker V.23 WWI Combat Sport Scale Plane
    • Great Planes PT-40 Trainer
    • Great Planes Combat Spitfire
    • Hobbico TWINSTAR
    • Other Planes >
      • Flite-Test FT-Cruiser
      • Micro Fokker Eindecker by Dave Robelen
    • Things I've learned....
  • About
    • July 12, 2017 Flood
  • Other....
    • Remembering Charles & Eva >
      • Feist Family Photos
  • KW4JM Contact Log

xiegu G90 20 watt all mode 160m-10m hf radio


2022-01-04 Yesterday I installed the recently released G90_MainUnit_FW_V1.78b2021123101 firmware update along with G90_DispUnit_FW(stdcm3)_V1.77b2021032102 as directed. I've been using version 1.75 Final for quite a while now and been very pleased with it. But I like trying the latest thing, hence the update. The update installation went smoothly and the radio came to life as expected. Had to adjust the CW sidetone level down so it wouldn't blow me out of the room but otherwise it worked pretty much as expected on both receive and transmit.
Initial observations. The primary operational thing i noticed is that the function of the AGC is quite different. I think I like it better as it is much more like AGC on most rigs. A related thing I noticed is that with AGC active, selecting Attenuator, no attenuator or Preamp made relatively little difference whereas it made a large difference in the previous version. I am still trying to understand how AGC and manual RF Gain work. It appears that with AGC off the manual RF Gain adjustment is in full control. But if AGC is on Fast, Slow or Auto it takes full control. I'll keep working with it to try to figure out how to use AGC, RF Gain and Attenuator together to get best results.

2020-10-18 After posting the pictures below on Facebook yesterday someone asked, "I would be interested to know how to you compare the G90 with the IC-7300?" I really like both. I find the g90 receiver equal to the 7300. I like the way you tune it vs the way you tune the 7300. The receive audio out of the box of the g90 is more pleasant to me than the 7300. Using an external speaker or headphones they are same. The filtering is excellent on both. Overall the g90 seems a bit simpler to use and adjust but capabilities are very similar. Both exceed the 7000, 7100 ft817nd and ft857d and other rigs I've owned. I am happy with the smaller display on the g90. As to the xmiter, again both do well what I do mostly, CW, SSB, and some digital. I don't find the 20 watt max output of the g90 a seriously limiting factor. In fact I run the 7300 at 20w almost exclusively as well. The one feature I do miss on the g90 is recordable CW messages for repeating CQ calls. But the excellent internal tuner of the g90 makes up for it! The g90 is also much more portable-friendly. If I had to let one of the two go, not sure which it would be.

2020-10-17 ​I used my G90 portable, recently on several POTA adventures. I have separated the control head so I can place it for more convenient viewing and adjustment. I've used a bracket I made months ago but have not been all that happy with it so today I remade it! The pictures show it. My idea is that I can tilt it up for use and lay it down flat for packing. We'll see how I like it after a few uses. On my desk it seems to work great.

2020-04-19 On radios with internal tuners such as the G90 and x5105, the tuner is between the transmitter and the antenna, as if it were an external l tuner. The swr is read at the transmitter (including the sweep). Bypass the tuner and you see the swr at the antenna connector. Turn on the tuner and you see the swr as presented to the transmitter by the tuner. No different than how a rig sees swr using an external tuner that has a bypass switch.
2020-04-14 I installed the v1.74 firmware upgrade for my G90 this morning. It went well, once I realized I have to hit the spacebar immediately after powering up the radio. So far after a few QSOs it all seems good.
2020-03-15 I've been using my G90 as my primary rig in the shack for a number of months now and love it. I really have no complaints about it. I'm running V1.73 firmware with no problems. I use it most for CW, second most for SSB and almost none for digital. Until tonight. I decided to bypass the capacitors in the audio interface described below so now the rig goes directly to the USB audio dongle. Seems to work very well. In fact I had my first PSK-31 qso since last November with the modified interface using Ham Radio Deluxe DM-780. Got a very clean and strong signal report from the station in North Carolina. Nice long QSO on 40 meters. That was only my sixth digital QSO out of a total of 502, mostly CW ones, since I got the rig back in August of last year.Who knows, I may do a little more digital again! 
2020-01-23 This evening I was reminded why I love lower power, simple antennas and ham radio. Bands have been not-so-good the past few days. Relatively high ambient noise and few signals. But as I tuned my G90 around 40 meters I heard this guy calling in CW  CQ de K3Y/KH6. His signal sounded kind of hallow and distant. And lots of people were calling him. So I listened for a bit. Sure enough he was in Hawaii! That's a rare one for me, only three previous contacts in all my 60+ years on the air. So after the fray settled I gave him a call. It took a bit but he got my call and we exchanged the essentials, 559 both ways, name and SKCC numbers. My setup? The G90 at 20 watts and a QRPKITS 40-20 meter dual band trap dipole. Simple but effective! It was worth the wait.
Picture
G90 on picnic table for its first outing! Checked into the YL System.
2019-10-31 Last week I upgraded the G90 firmware to G90_MainUnit_FW_V1.71_build002.xgf  and G90_DispUnit_FW_V1.71_buid003.xgf. The upgrade went smoothly and I recommend it. Overall it is just smoother to use, a bit crisper display and a few more functions including a simple bandwidth adjustment and an RF Gain adjustment.
I had problems setting the transmit audio level from my computer for PSK31. I had to reduce the Window 10 speaker volume to 1 and the Aux In on the G90 to 1 and then very carefully bring up the level in DM780. It was almost like there was no drive and then suddenly power output as indicated on the G90 power meter would jump to 20 watts! I don't recall the same behavior in v1.6. I was sending a CQ call to a dummy load to do the test. So I concluded that there must be a glitch in the Aux In routine in v1.71.
We'll yesterday I decided to put an external power meter in the antenna feedline. Interesting... 1)If I selected CW mode and hit the key both the G90 and external power meters read the power identically. 2)If I sent a js8call tune signal to the radio, both meters read the same and and the Aux In audio level was easy to adjust to keep the power out around ten watts. 3)If I sent an unmodulated PSK31 signal to the radio the internal and external power meters were a little different but the transmit audio level was still easy to adjust. 4)However, if set the power out to ten watts with the unmodulated PSK31 and then modulated it by sending CQ for example, the external power meter remained pretty steady where as the G90 power meter would bounce all over the place and pegging full scald most of the time. I repeated this last test using psk125 and the there was some deviation on the G90 meter, but the external meter was almost stable at the unmodulated level.
My tentative conclusion? The radio works fine. But the algorithm that drives the G90 power meter gets confused with a modulated PSK31 signal. The phase shifting and/or tone shifting rate of the PSK31 signal seems to throw the internal meter into a tizzy.
2019-08-29 Today I made up the digital interface pictured below and had a PSK QSO with my friend Gary, KD9KHI on my G90 using HRD and DM780. Rig control including PTT was handled by HRD through the interface cable that came with the G90. That cable has to be plugged into the G90's control head and NOT into the COM jack in the back of the G90.
As the schematic shows the interface is very simple, just 2 capacitors, one in the wire between ACC DIN jack AF OUT and the tip of the plug to the computer mike or aux in and one in the wire between the ACC DIN jack AF IN and the tip of the the plug from the spk or aux out on the computer. I actually used a USB sound card dongle from an old headset rather than plugging into the computer audio in and out directly. Soldering the three wires to the tiny pins of the DIN plug was the hardest part! The layout of the AÇC jack on the G90 in the manual shows the three pins used, GND, AF OUT and AF IN.
I had a couple 0.47uf caps in my junk box but any value from about 0.2uf up would likely work. I don't like electrolytic caps in these applications because they are polarized but they would probably be OK too. Ground goes to the barrel of the audio plugs and the ring is not used. Only the tip and barrel of each are used.
Finally, you have to select the AUX IN by pressing the FUNC button then the PWR button twice and selecting LINE input by turning the tuning knob. And then adjust the transmit audio level in HRD so you don't overdrive the transmitter. I did that by setting the transmitter power to 20 watts and then slowly increasing the transmit audio up from zero in DM780 until the transmitted power out was peaking at about ten watts. Gary verified that my signal was clean and not splattering all over the place. I wouldn't push the G90 beyond ten watts and would be happier keeping it lower than that to avoid damage since digital modes are 100% duty cycle.
A few hours later I had a 20 meter PSK QSO with WA7HDZ in Washington State, 1450 miles. It was a bit touch and go but we got through it. He was running about 25 watts to a dipole, I between 5 and 10 watts with my MFJ 1984MP EFHW antenna. So it really does work!
2019-08-26 I've been having fun with my G90. I decided to use it exclusively for a few weeks so I really get to know it. So far I haven't found anything I don't like! I've got a friend who is seriously considering getting one so he stopped by today to have a look. He likes to work digital modes and had a lot of questions about that. I seldom work digital and had not even connected up the CAT control. So after he left I got the cable. I initially plugged it into the COM jack on the back. That didn't work. Glancing through the manual I noted it said to plug it into the jack on the control head. As soon as I did that all worked. HRD immediately found it with the settings for an Icom IC7000. Now to figure out the audio interface!
2019-08-17 On August 8, just a little over a week ago I got my Xiegu G90 from MFJ, four days after ordering it. After playing with it a bit I figured out how to adjust the xmit power and attach an external speaker. Then I set the power to 5w, connected up my mfj 1984MP, 40-10 efhw antenna, tuned to 14.060 and called CQ (16:46z). On first call K6HPX in AZ came back, 1435miles. He was about 449 here in WI and gave me a 519. Our QSO was brief but real! Not a bad start! My only real observation so far is that straight Key CW seems very smooth. I compared receive performance with my x5105 and IC7100 by switching the same antenna between them on the same signal. I didn't notice any important differences. I'm excited!
I'm really enjoying the G90 after about a week owning it and 41 QSOs. I've had 20 CW QSOs, mixture of straight and paddle keys with no problems at all. Also have enjoyed 21 SSB QSOs, again with no issues. All QSOs except one have been on 40 or 20 meters using my mfj 40 meter EFHW antenna. That one, was using my portable Wolf River Coils vertical at a nearby park.
Some have reported problems with buttons on the front and other things but I've had nothing but fun with mine. I'll wait a bit but if I continue to like it I'll sell my fourteen year old Icom IC-7000 100w backup radio and keep the G90. It seems like a great combination of form and function for both portable and base operation. I may even sell my x5105 which I really like after a year of use. The G90 matches or exceeds nearly everything that the x5105 does except for the x5105's "extended backpacking portability" which I dream about often but almost never do!  The main difference is that the G90 weighs nearly twice as much and does not include a built in battery. Both are great little rigs and are essentially a complete ham shack in a single small package.
The automatic antenna tuner in the G90 has tuned everything I've tried with it so far and is much faster than the one in the x5105 which is nice. But both work well as far as I can tell. With the G90 I haven't worked with anything other than the mfj 1984MP, 40-10 efhw so far. But I have successfully used the x5105 on a variety of end fed resonant and non-resonant antennas.
The up to 20 watt output power of the G90 is perfect. I have for years mostly used around 25 watts for CW and about 50 for SSB even with my 100 watt rigs. And since I mostly work CW, 20 watts seems perfect. Last evening I answered a CW CQ on 40 meters from a station in Texas running 20 watts. He mentioned that he loved QRP so I dropped the power to 5 watts. He said he didn't notice any difference in my signal, giving me a 579! Propagation is everything, but that was an interesting experiment.  The past year since getting my X5105 I've made 339 contacts and found that five watts can fill the log book! However, having the 20 watt option is nice, particularly for SSB!
One other thing that I really like about the G90 is its SDR architecture, most noticeable to me in the graphic display which shows both a waterfall and waveform. After a week of playing almost exclusively with that on the G90, I find all my other rigs a bit "blind" since you can only find a signal by tuning around! The G90, and I suppose all other SDR rigs, provide that wonderful graphic display of the signals. I fear that now that I have used it I will never be happy with rigs without it!
Proudly powered by Weebly