开云体育

ctrl + shift + ? for shortcuts
© 2025 开云体育
  1. YaesuFT847
  2. Topics

Power out Ft8 2m

Alan
 

I've? just started using my 847 on 2m FT8. What's the maximum power everyones running with 2m FT8?
 

Depends on what you want to do.? I think most are running anywhere from 30-50 watts if using and amplifier.

No amp, most I would think are running full power or 100 watts.

Just my opinion.

Bill, K2WH
Alan
 

Bill the 847 will only give a max of 50w on 2m. I thought it was clear what I wanted to do with it, but let's try again. I want to run with no amp the 847 on 2m using FT8. If others are doing this between 0 and 50w max what power are you running.
 

Alan,
I would suggest you stick with 50 watts or full power on FT8. I use mostly MSK144 as I'm in a remote location and rely on Meteors or Aircraft Scatter and I use 400 to 800 watts with an 18 element beam at 60 feet.

Have fun with FT8 on 2 meters.

W7FSI
DN-24
IDAHO

On Thu, Dec 2, 2021 at 1:26 PM Alan via <g4gvb=[email protected]> wrote:
Bill the 847 will only give a max of 50w on 2m. I thought it was clear what I wanted to do with it, but let's try again. I want to run with no amp the 847 on 2m using FT8. If others are doing this between 0 and 50w max what power are you running.

 

开云体育

If I recall, I think I was running around 30 watts on 2m, last time I tried it there.? Not much by way of contacts (it was winter field day, I think), but the 847 seemed ok with it.? I was feeding a 2x8 element CP yagi on the roof.

As has been noted, FT-8 is a weak signal mode, not necessarily a low power mode.?

Greg? KO6TH


Alan via groups.io wrote:

Bill the 847 will only give a max of 50w on 2m. I thought it was clear what I wanted to do with it, but let's try again. I want to run with no amp the 847 on 2m using FT8. If others are doing this between 0 and 50w max what power are you running.

 

开云体育

I run 100 watts max, that’s all I have.

?

It’s been a long time since I had an FT-857, I now use the IC-9700 which is 100 watts max.

?

So, since its only 50 watts, I would run full power or lower power to drive an amp.

?

Many confuse the description of FT8 as a weak signal mode and it is but the term weak signal mode, describes its ability to decode very weak signals but many misinterpret this and believe they need to use low power IE. use low power.

?

FT8 is capable of copying very weak signals but that does not mean you should lower your power especially on 2 meters where high power is almost mandatory if you want to work the weak ones.

?

I am currently building a kilowatt amp for 2.

?

K2WH

?

From: [email protected] [mailto:[email protected]] On Behalf Of Alan via groups.io
Sent: Thursday, December 02, 2021 3:27 PM
To: [email protected]
Subject: Re: [YaesuFT847] Power out Ft8 2m

?

Bill the 847 will only give a max of 50w on 2m. I thought it was clear what I wanted to do with it, but let's try again. I want to run with no amp the 847 on 2m using FT8. If others are doing this between 0 and 50w max what power are you running.


--
Bill, K2WH
 

I run mine at 80-90 watts.? When running FT-8 the transmit on time is less than 50%.?

73,

Tom K6EU?

On Thu, Dec 2, 2021 at 12:26 PM Alan via <g4gvb=[email protected]> wrote:
Bill the 847 will only give a max of 50w on 2m. I thought it was clear what I wanted to do with it, but let's try again. I want to run with no amp the 847 on 2m using FT8. If others are doing this between 0 and 50w max what power are you running.

 

Sorry, not thinking clearly.? Please disregard my previous.

73,

Tom K6EU



On Thu, Dec 2, 2021 at 4:19 PM K6EU via <wa4qvq=[email protected]> wrote:
I run mine at 80-90 watts.? When running FT-8 the transmit on time is less than 50%.?

73,

Tom K6EU?

On Thu, Dec 2, 2021 at 12:26 PM Alan via <g4gvb=[email protected]> wrote:
Bill the 847 will only give a max of 50w on 2m. I thought it was clear what I wanted to do with it, but let's try again. I want to run with no amp the 847 on 2m using FT8. If others are doing this between 0 and 50w max what power are you running.

 

Hi

I would stick to maximum of 25watts from 847 on 2m FT8.

I actually use 70amps from a small valve amp but i wouldn't run the 847 at full power. so stick with 25-30 watts max on 2m. The extra 2 or 3 dB is useful of course but not gonna make a load of difference .

Enjoy

73 de Rob G4UJS
Jim Warner
 

We receive a lot of various brand radios damaged by data mode thermal runaway.
The 847 is no exception. Page 16 of the dreaded owners manual tells us that cool down time needed is longer than the transmit time applied, and suggests setting 25W max on the VHF band for extended TX times on FM and data modes.
Ft8, etc was intended to be a QRP mode with a lot of educational value
for weak signal enthusiasts, but the "all knobs full right" mentality has turned a once good M2M I heard you, you heard me bye mode. Now the primary source of IMD QRM products in and adjacent to FT8 windows is increasingly caused by stressed transmitters over configuration settings.
If you need RF power to be heard, you are better off investing in an engineered antenna system or supplemental RF power amplifier specified for the duty cycle.
Jim WA9Z
Exline Signal LLC

On 12/2/2021 1:47 PM, Alan via groups.io wrote:
I've? just started using my 847 on 2m FT8. What's the maximum power everyones running with 2m FT8?

1 - 10 of 10