[ICOM] Re: IC746 Lack of Output

[Mike]

Hello,

The IC746 has no output when the microphone is used as well as when 
the audio is fed in thru the ACC1 pin 4.  Unless the RF PWR is 
adjusted almost CCW, the 746 doesn't have any output.  Now that I 
know the same problem is occurring with the microphone, I'll look in 
the archives to see if anyone has experienced the same and what was 
done to correct.

I would appreciate any information anyone has on a possible solution 
to the problem.

At 11:15 PM 7/2/2006, Mike wrote:
>Hello,
>
>My IC746, S/N 02729, does not put out power when fed with an AFSK 
>signal, pin 4 ACC1.  However, power is obtained by turning the RF 
>PWR down until the knob mark is at 8:00.  Once power output is seen 
>on the display, the RF PWR can be turned up to full 
>output.  Unfortunately, once the audio signal is recycled, e.g., 
>plug is removed from the audio output jack on the sound card, no 
>output.  Repeat the turning down the RF PWR and power output 
>returns, but still has the same limitation of not being able to key 
>the radio and still have output other than at the low output level 
>and then turn up the power.  CW works okay at any RF PWR 
>setting.  What's strange is this set-up worked before Field Day when 
>the radio was disconnected and used in the field.  The connections/cables +
>
>
>
>
>
>
>
>
>
>have been checked out.  Another IC746 operates okay in a SO2R 
>arrangement.  Both are controlled by a single computer running 
>Windows XP SP2, and Writelog with MMTTY.  Separate sound cards are 
>used.  A Creative Sound Blaster 16 is used for the IC746 with the 
>output problem.
>
>         73,
>         Mike, K4GMH