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Author Topic: Yaesu ft-2900 100w version.  (Read 4799 times)
LB5KE
Member

Posts: 141




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« on: December 21, 2013, 12:07:15 PM »

I have seen some that are software upgraded to 100w.
Are these safe to use? Or should i stay away?
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G8YMW
Member

Posts: 256




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« Reply #1 on: December 21, 2013, 01:34:07 PM »

65 watts, 100 watts? I doubt anyone at the "other end" would notice.
As for safe? I would say make sure your wiring is up to the job by quite a margin and plenty of air can get around the radio.
Anything else I will leave to those in the know

73 de Tony
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73 de Tony
Sent by WW2 Royal Navy signal lamp
M6GOM
Member

Posts: 992




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« Reply #2 on: December 21, 2013, 03:31:41 PM »

They get the additional power by overdriving the PA stages. Its the same as the idiots selling 140W TS590s...

You can wind it up to that but how long it lasts is anyones guess and the TX IMD will be terrible.
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AA4HA
Member

Posts: 1583




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« Reply #3 on: December 21, 2013, 05:17:22 PM »

I would not call it a software "upgrade". All they are doing is setting the power levels in the radio to much higher levels. Anyone can do that and ruin their own radios.

Running closer to the jagged edge you are much more likely to burn out the final power amplifier transistors. Your operating style needs to be changed as well. Completely forget about any mode of operation where you are transmitting for more than a few seconds of time. All of that excess heat needs to be removed from the PA transistors as fast as possible.
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Ms. Tisha Hayes, AA4HA
Lookout Mountain, Alabama
KQ6Q
Member

Posts: 991




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« Reply #4 on: December 23, 2013, 09:00:52 PM »

You may find the solder melting before the transistors fail. Either way, pushing up the power on a mobile radio is NOT advised. You will decrease the time to failure a whole lot too!
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KK4LGR
Member

Posts: 53




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« Reply #5 on: December 26, 2013, 03:42:29 PM »

I just worked a repeater 40 miles away with an indoor antenna and 5 watts with my FT-1900.  What do you need so much power for?
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"Well I'm sure glad we've got these ham radios to talk on."
--Unidentified station heard on 2 meters
K7RBW
Member

Posts: 398




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« Reply #6 on: December 27, 2013, 08:32:37 AM »

All that risk for 1db of extra power? Why?
If that 1 db is so important, get a better antenna. That way you'll get better transmit AND receive (and not fry your radio in the process).
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ONAIR
Member

Posts: 1747




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« Reply #7 on: January 01, 2014, 03:17:24 PM »

Just buy or build a 2 Meter beam!  No need to mess around with the radio to get greater range.
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