I tried the same thing. I found I had RF feed back into the rig.
Remember the Mic input and the Audio input at the back of the rig are
both hot anytime the PTT is keyed. I have not fixed my problems yet.
Looking at using the RTTY keying instead of audio.
On Thu, 6 Nov 1997 08:48:21 MST firstname.lastname@example.org (R Ogborn) writes:
>I just hooked up my new AEA DSP-232 Multi-mode controller to my TenTec
>Omni D last night (Audio FSK). I used the RCA patch-in/patch-out and
>PTT jacks on the back of the rig to interface with the TNC.
>I'm having a problem adjusting the TNC's line out to the rig's
>patch-in. Seems the line-out of the TNC's level is too high as it is
>overdriving the rig. There is a jumper in the TNC to set the line-out
>(they call it TX out) to a "low" setting, so I set it from high to
>low, and re-adjusted the line-out pot, but didn't seem to notice much
>difference. I can get it to drive the rig at a reasonable level by
>turning down the rig's drive control at about 1 1/2 setting, but if
>moved just a hair, I go to overdrive (ALC lights bright and watts out
>goes to 105) to nothing. I want to have full control so I can run QRP
>if I wish and half power (50 watts) other times.
>I called Timewave, but found that they are not quite set-up yet after
>the AEA acquisition to help much.
>Can any one help? Should I just attenuate the line-out more with a
>resistor? What value should I start with and does it go inline or
>across center to sheila? I'm thinking that it may be an impedance
>mismatch. The TNC is supposed to "handle" both high and low impedance
>inputs. Looking at the schematic, it appears that the patch-in should
>have the same impedance requirement as the mic input.
>Thanks in advance!
>R Ogborn - KI0ER
>Littleton, Colorado, U.S.A
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