[TenTec] TenTec Corsair II 561 or antenna issue

[KB8OCA]

Thanks all.

There is a few things that I have not been able to check just yet, so with a 
bit of luck I will get that done tonight or tomorrow.

I did check the microphone and cable, that seems to be fine. I have not been 
able to check the coax / antenna as well as the grounding, so that is next 
on the list.

Thanks for the suggestions.

73,
KB8OCA

--------------------------------------------------
From: "Bill Cotter" <n4lg at qx.net>
Sent: Tuesday, December 04, 2007 10:55 AM
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Subject: Re: [TenTec] TenTec Corsair II 561 or antenna issue

> The symptoms sound like RF feedback via the microphone circuit.
> Since the problem just started occurring, look for disconnected
> cables, loose connections, corrosion, etc. The dummy load test
> suggests RF on the feedline, tuner or antenna is getting back into
> your rig.
>
> In addition to checking the mic cable shield and the coax cable to
> your antenna tuner, make sure your station's RF ground is short and
> low impedance. That it connects to the rig, tuner, power supply and
> ground.
>
> Whether you use a #0000 cable or copper foil or whatever, a
> suitable DC ground (one or more rods) and an RF ground (radial
> counterpoise lines away from the shack) at the end is important.
> Make absolutely certain the ground line is NOT a 1/4 wavelength at
> any frequency.
>
> 73 Bill N4LG
>
>
> At 10:23 AM 12/4/2007, KB8OCA wrote:
>>HI everyone,
>>
>> >From the title you can see I own a TenTec 561 Corsair II, and it
>> has been working very well so far ... until this past Saturday evening.
>>The TenTec is connected to a G5RV via a manual tuner, which all
>>has been working very well for me.
>>
>>The problem now is, that folks are saying my audio is all garbled
>>to a point where they can not understand one work I am saying.
>>Also, when I key the radio, the power meter immediately goes up
>>mid scale, without me making any sound what so ever.
>>
>>I then decided to work with my ALC control, speech processor and
>>the drive control, but that had very little effect. Even is my ALC
>>is turned all the way clockwise, speech processor is off, and
>>drive is let's say at 0.5, I can hear a beeping sound right away.
>>Despite all of this, my SWR indication is correct, below 1.2 : 1
>>
>>I then disconnected the tuner and antenna, and connected a dummy
>>load directly to the radio.
>>Now everything seems to be back to normal. I can adjust the radio
>>the way I expected it etc.
>>
>> >From that I assume I am having antenna problems, the thing that
>> does not make any sense however is my SWR, which is perfect .....
>>
>>Do any of you have any ideas what might be happening here ?
>>
>>Like I said this started all of a sudden. It was working Saturday
>>morning, and by Saturday evening it was like described above. It
>>was still the same on Sunday, and yesterday as well, so something
>>sure changed.
>>
>>Thanks for your help.
>>
>>73,
>>KB8OCA
>>_______________________________________________
>>TenTec mailing list
>>TenTec at contesting.com
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>
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