first I will say I am very lucky with my Flex 6300 transceiver, but the last two weeks I get more and more sorrows about the descending output power. When the radio was new, I got 100W RF Output on every band, now the maximum is hardly at 80 watts. The software meter as well the extern power meter show nearly the same low power. A few weeks ago, i thought the output power is going down while the radio gets warmer, so i installed a external blower wich makes a air flow around the radio. The internal PA cooler starts to run very seldom. I checked the power supply and changed it to a laboratory version, capable 100A at 14V (and more), and checked the voltage right through the input jag. At this point it is exactly 13.8V while key down. I changed the antenna cable with the same result. I think this radio has a hardware problem. The power is low in every mode. The measurement was made at a BIRD 500W dummy load, and checked with Rhode&Schwarz CMS 50. Please give me some hint and help. Best regards DL2KBQ
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Posted 4 years ago
Mack McCormick, Elmer
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May I suggest a few things to try:
1. Connect a 50 ohm dummy load to the antenna port with a wattmeter inline. What are your readings?
2. Do you have a second wattmeter or one you can borrow to confirm the issue is not with your wattmeter?
3. Back up your profiles in SmartSDR and do a factory reset.
Factory reset:
Power off the radio
Press and hold the power button until it flashes or is white (can't remember which one the 6300 does)
The radio now has factory settings
4. Repeat test 1 again.
Mack
W4AX
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thank You very much for your hints and very fast reply. I followed your advices and have done the factory reset. The wattmeter is direct to the output of ant1. I checked the internal power meter with my CMS50, unfortunately it can ́t handle the full 100W, but it can take 50W continous. both meters intern, extern and inline are reading the same (+/- 3W). Then i have connected only to the dummy and checked the full power, only reading about 80/82 Watts. The input current at 14,2V is only 15,8 amps, thats much to low for 100W output and strengthens the measurement. Any other idea than recalibration ?
Best regards,
Horst-Andre
Mack McCormick, Elmer
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I tested my 6700 here (could also test the 6500 if needed) and I'm getting 69.2W (calibrated wattmeter) into a dummy load. Using a lab power supply with voltage sense at the powerpole connectors on the back on the rig it reads 13.8V at 11.1 amps.
I'm a long time alpha tester. I'll report this to the rest of the Alpha team and ask them to take similar measurements. I'll get back to you.
Mack
Mack McCormick, Elmer
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Horst-Andre,
I understand Klaus, in Germany, has contacted you to help.
73,
Mack
W4AX
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the FLEX 6300 is a unit with builtin ATU, I used the radio most time at 20m some qso at 15m, well tuned with the internal ATU. 10m is dead the last time, for 80m/40m i have no antenna this moment. All the measurements i made was done at the BIRD dummy load 50Ohms and the Rohde/Schwarz CMS50 Radiocommunication Service Monitor. Best regard, Horst
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- 80m 75.0w 13.4v 1:1.06
- 40m 77.8w 13.5v 1:1.00
- 30m 73.4w 13.4v 1:1.07
- 20m 85.6w 13.3v 1:1.04
- 17m 72.3w 13.4v 1:1.26
- 15m 75.7w 13.4v 1:1.04
- 12m 83.5w 13.4v 1:1.00
- 10m 80.7w 13.3v 1:1.10
- 6m 78.2w 13.5v 1:1.31
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Tim - W4TME, Customer Experience Manager
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Should we all open tickets or wait for your techs to take a look at it just in case it might be software related?
Thanks.
Al K0VM, Elmer
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Al, K0Vm
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Tim - W4TME, Customer Experience Manager
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I would not wish to waste the Helpdesk's time. Can I rely on the power meter being accurate as I do not have a dummy load nor any other way of measuring power? Is so, I will open a ticket and refer it to this thread, or you could create one on my behalf.
Cheers
Guy
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Al K0VM, Elmer
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AL, K0VM
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- 80m 75.0w 77.2w
- 40m 77.8w 79.1w
- 30m 73.4w 75.2w
- 20m 85.6w 90.2w
- 17m 72.3w 75.6w
- 15m 75.7w 77.0w
- 12m 83.5w 83.5w
- 10m 80.7w 82.0w
- 6m 78.2w 79.2w
G5RV 80m/40m
Log 30m-6m
Slight improvement in 1.6 vs 1.7
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Please no guys with the 3DB and other guy doesn't know the different stuff. I just want to know why a 100 watts rig is down 20 percent??
Joe K0BX
Tim - W4TME, Customer Experience Manager
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Joe K0BX
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deciding to try it out on the air, my external tuner showed 106 watts out at full power.
It isn't conclusive, but I suspect that at least in my case, the radio is putting our around the right power.
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I recall noting when I first got it that the SSDR meter was reporting very close to the set power; over time they seem to have drifted further apart. So, for my test today, I was running into a 50 ohm dummy load, comparing the on-screen power against a Drake WH7. Both reported about the same power.
I'll open a help desk ticket, but am inclined to watch how this develops before sending the radio in.
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I am also inclined to wait and see if this is a software or hardware issue before opening a ticket.
Tim - W4TME, Customer Experience Manager
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For details on how to submit a HelpDesk support ticket, please refer to the following URL: http://helpdesk.flexradio.com/hc/en-us/articles/202118688-How-to-Submit-a-Request-for-Technical-Supp... Once the support ticket is submitted, a support engineer will be in contact so we can work on the issue. Make sure to include your radio's serial number.open a HelpDesk.
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Thanks
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today I had some time to do a verification measurement under some variation of the supply voltage and correction of the rippleness coming from my -20dB attenuator.
I verificated the results against my R&S CMS50 my HP8920B and controlled the voltage direct at antenna output with my 1GHz LeCroy 584AM digital Scope.
Here are the results (cold state):
@13,8V @13V @14,8V
FT767GX (26years old)
1,8
71W
65W
75W 102W compare
3,5 81W 79W 87W 99W
7 84W 81W 91W 99,5W
10 82W 79W 88W 99W
14 93W 84W 101W 99,7W
18 91W 86W 98W 102W
21 88W 82W 96W 104W
25 88W 81W 98W 108W
29 93W 87W 105W 109W
50 87W 82W 99W 14W
The difference between warm and cold FLEX is about - 4W in warm state.Do not trust in a measurement that you have not manipulated by yourself! :-)
Best regards
Horst
Tim - W4TME, Customer Experience Manager
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Tim - W4TME, Customer Experience Manager
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maybe time to check ohmic drop (voltage drop ) to PA deck internally or PA class AB bias shift ( Check with FRS on how to proceed )
I use an external linear so I have a Poor Man's 100Watts output at about 85Watts here not a show stopper here with Flex6700 at 13.8Vdc applied.
Tim - W4TME, Customer Experience Manager
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http://www.flexradio.com/support/service/
Tim - W4TME, Customer Experience Manager
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http://www.mkcmsoftware.com/Flex/Index
Besides the meters is also has many other features you may find useful.
73's
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