YAESU FT-817 TX POWER
Has anyone ever taken time to actually measure the tx power on vhf and uhf of the FT -817 ? After receiving a new one this week ,I took mine to the work where we have all the eqpt to spec it out and was disappointed with what I saw. Thanks to all who reply. Jeff WB8RJY
jeff broughton
5W is the spec for external power. 2.5? on internal battery.
On Thu, Nov 24, 2016 at 8:35 AM, jeffory broughton jefforybroughton@gmail.com wrote:
Has anyone ever taken time to actually measure the tx power on vhf and uhf of the FT -817 ? After receiving a new one this week ,I took mine to the work where we have all the eqpt to spec it out and was disappointed with what I saw. Thanks to all who reply. Jeff WB8RJY
jeff broughton _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
As mentioned here, 2.5 watts if on internal battery. If you have a voltage source plugged in, it will do 5 watts. However, the supplied power pack will still only give about 3 - 3.5 volts due to the load.
My old FT-817 (16 years old), finally died with the known final s shorted. It went so bad, that it fried the driver PC board as well. Since it cost almost half the value of the unit to replace3 the PC board, I bought a newer FT-817ND unit which contains the 60 meter values, and the newer type of finals to prevent the previously mentioned problem.
Regards,
Reid, W4UPD
On 11/24/2016 8:40 AM, Norm n3ykf wrote:
5W is the spec for external power. 2.5? on internal battery.
On Thu, Nov 24, 2016 at 8:35 AM, jeffory broughton jefforybroughton@gmail.com wrote:
Has anyone ever taken time to actually measure the tx power on vhf and uhf of the FT -817 ? After receiving a new one this week ,I took mine to the work where we have all the eqpt to spec it out and was disappointed with what I saw. Thanks to all who reply. Jeff WB8RJY
jeff broughton _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
It will do 5w on the internal battery, the power indicator will blink when set. Default is 2.5w on internals though.
- Matthew KK4FEM
Sent from my iPhone
On Nov 24, 2016, at 09:13, w4upd w4upd@cfl.rr.com wrote:
As mentioned here, 2.5 watts if on internal battery. If you have a voltage source plugged in, it will do 5 watts. However, the supplied power pack will still only give about 3 - 3.5 volts due to the load.
My old FT-817 (16 years old), finally died with the known final s shorted. It went so bad, that it fried the driver PC board as well. Since it cost almost half the value of the unit to replace3 the PC board, I bought a newer FT-817ND unit which contains the 60 meter values, and the newer type of finals to prevent the previously mentioned problem.
Regards,
Reid, W4UPD
On 11/24/2016 8:40 AM, Norm n3ykf wrote: 5W is the spec for external power. 2.5? on internal battery.
On Thu, Nov 24, 2016 at 8:35 AM, jeffory broughton jefforybroughton@gmail.com wrote:
Has anyone ever taken time to actually measure the tx power on vhf and uhf of the FT -817 ? After receiving a new one this week ,I took mine to the work where we have all the eqpt to spec it out and was disappointed with what I saw. Thanks to all who reply. Jeff WB8RJY
jeff broughton _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Jeff,
Years ago, I measured the output frmo my two FT-817NDs. One was purchased in 2004 when that model was released, and the other in 2008 when I started working SSB satellites. Both of these radios will transmit at 5W on high power, across 2m and 70cm, when I tried this into a dummy load.
These radios will default to the 2.5W power level when powered on internal battery packs that don't provide some level of voltage above 11V, but can transmit at 5W when you select that power level with the PWR button. This was the case with the Yaesu NiCad packs supplied with the radios, and with aftermarker 9.6V NiMH packs I had been using for many years. I now use the Windcamp LiPo packs that are nomially rated at 11.6V. With the Windcamp packs, my radios power up and start out at the high (5W) power level, instead of having to manually select that with the PWR button. I also like the separate charging port for these packs. Since installing the Windcamp packs a few weeks ago, I have been happy with how they perform. Charging is easier, and quicker, than using higher-capacity NiMH packs as I did in the past.
73!
Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/ Twitter: @WD9EWK
On Thu, Nov 24, 2016 at 1:35 PM, jeffory broughton < jefforybroughton@gmail.com> wrote:
Has anyone ever taken time to actually measure the tx power on vhf and uhf of the FT -817 ? After receiving a new one this week ,I took mine to the work where we have all the eqpt to spec it out and was disappointed with what I saw. Thanks to all who reply. Jeff WB8RJY
jeff broughton _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
participants (5)
-
jeffory broughton -
Matthew Stevens -
Norm n3ykf -
Patrick STODDARD (WD9EWK/VA7EWK) -
w4upd