开云体育

-----Original Message-----
From: fxk47@... [mailto:fxk47@...]
Sent: Sunday, May 27, 2001 7:45 AM
To: FT817@...
Subject: [FT817] Frequency Calibration

I just received my FT817 - The radio came in excellent condition and
turned on properly, but there were several problems on startup - any
fixes for this, aside from sending back?

Problem Number 1:
On transmitting and receiving I noticed a frequency dependent error
in the displayed received, and transmitting frequency. Basically the
radio display read LOWER than the actual frequency on both transmit
and receive. Using an AOR AR7030, VX5-R and an Optoelectronics Scout
frequency counter, I found the followig:
440 Mhz: transmits and receives 15 kHz low (e.g.. to xmit on my
local 443.4 rpt, I must enter 443.415)
2 meter: 5 kHz low
10 meter: 0.650 kHz low
21 meter: 0.450 kHz low
etc.
It's possible that the FT817 is off frequency. Probably time to send it
back. But before you do, you need to make sure that you measurement
methods are calibrated correctly (although 15kHz is a lot of error).
Have you tried listening to WWV and determining the error from a known
reliable source? Have you validated the frequency measurement on the
frequency counter?


Problem Number 2: There is something wrong with the power output on
SSB compared to AM and CW. When I transmit on AM and CW and set the
meter to read Power Output, the meter behaves as expected, i.e. more
bars for higher power and the battery voltage on my gel cell
decreases appropriately for high current draw (e.g. goes from 11.9 v
to 9.0 volts at high power). HOWEVER on both LSB and USB, the Power
meter never shows any bars despite my ramping the power output up and
down. Furthermore, the battery voltage only comes down to 11.4 volts
implying minimal current draw and minimal power output. I CAN hear
myself transmitting (off frequency) on the AR7030, so it does
transmit.

Are you injecting tone or noise for SSB? Has the mic gain been reduced?
SSB without any audio has no output power.


Problem Number 3:
This may not be a problem - I might just be doing something wrong -
in adjusting the microphone the manual tells you to dial up the MIC
GAIN menu, then speak and look for increasing and decreasing bars - I
NEVER see any bar despite varying the gain from 0 to 100. I DO hear
the effect of increasing and decreasing gain when I monitor my
transmission, but the radio just does not show it.

The mic gain controls are shown in numbers, not bars. Reset all of the
mic gains to their default 50. Actually I'd suggest thinking about doing
a complete reset on the radio (as indicated in the back of the manual)

For not having power out on SSB and being 15 kHz off, that's not what I
would call "excellent condition"


thanks,
Fred Kelcz
N9SLR






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