[TenTec] Eagle problem?

[Robert]

Correct. But with the Paragon series and Omni V & VI series, anytime you have a mike connected along with the  back panel source too then you have both connected.  Use the mike when needed but disconnect the rear pnl connection. Same when using the audio in on the rear, disconnect the mike. 

Again, bond all equipment together at the power supply and forget abt a dedicated external ground. 

If issues exist then address any common mode problems. 

73
Bob, K4TAX


Sent from my iPhone

> On May 15, 2014, at 2:25 PM, Carter <k8vt at ameritech.net> wrote:
> 
>> On 5/14/2014 4:53 PM, Bob McGraw - K4TAX wrote:
>> My first rule of  engagement......."if it is a mike connect it to the
> > mike input.  If it is not a mike then don't connect it to the mike
> > input."
> 
> Yeah, but...
> 
> I HAVE connected the mic to the mic input -- a 705(?) TT and a Heil Pro headset. Neither works above ~ 10 watts input, even with the mic cable using various styles and quantities of ferrite chokes. And this was with NO computer interface anywhere (unless you count the KAM+ connecting to the rear panel FSK jack).
> 
>> I recall that the Omni VI has  an Audio Input on the rear.  This is
> > the place to connect the audio data for the radio.  Now with that
> > being said, in doing this one needs to terminate the audio line at
> > the radio input with a 270 to 470 ohm resistor.  There is already a
> > 10K build out resistor on the inside. Adding  the R at the cable end
> > effectively forms a L pad or attenuator. This R can be added
> > physically inside the RCA connector on the cable or across the
> > female RCA jack on the inside of the radio.  The objective is to get
> > the signal level higher on the cable from the computer/interface to
> > the radio thus improving the signal-to-noise ratio.  In this case
> > the noise is RF.  Even a step further is to add some 10 to 20 dB
> > attenuation in the form of a Pi attenuator at the connector end at
> > the radio.  This will require the audio level to be raised at the
> > computer/interface.
> 
> You are correct. There is an RCA jack on the rear panel that is connected right to the front panel mic jack through a 10K resistor.Your idea of terminating the rear RCA jack with a low value resistor is certainly worth a try.
> 
>> The MIC gain on the radio  should operate about the 9 to 10 o'clock
> > position. Be sure the Speech Processor is not active.  Set the radio
> > for 100 watts and adjust the audio level from the computer/interface
> > to produce some 35 watts of output.
> 
> Correct, I -never use the speech processor.
> 
>> I've used this very  successfully on a Paragon, a Paragon II and two
> > different Omni VI radios.  I also use VOX to handle the RX/TX
> > switching.
> 
> Not using VOX. Have a "Rig Blaster Advantage" that I just got a month or two ago to do PSK and JT modes -- and that is what finally brought the situation to a head and prompted my original post.
> 
> 73,
> Carter   K8VT
> 
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