[TenTec] RFI question for Orion and other TT rigs

[n4lq]

Bob:
 I agree. The radio is usually at fault. After all, radios do produce the RF 
and it should be able to survive in it's own RF field. This goes to 
peripherals such as keyers too. I've had some early PIC based MFJ keyers go 
totally crazy when exposed to a little RF. My newer MFJ-495 seems to be 
immune. No, you can't completely blame the environment. A radio should not 
act up even if the antenna is only 10ft away or directly overhead. Certainly 
some rigs are more susceptible. My IC-706 mobile hates 17 meters. The cable 
between the rig and face plate seems to be at fault.
Rather than blaming RFI on aluminum, I think the blame goes to the lack of 
bypassing on IC leads and external jacks. Comparing the schematic between 
various models and brands of rigs reveals which manufactures have taken the 
greatest care to provide RF bypassing.

Steve Ellington
N4LQ at insightbb.com
----- Original Message ----- 
From: "Carter Grabarczyk" <k8vt at ameritech.net>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Sunday, June 26, 2005 6:03 PM
Subject: Re: [TenTec] RFI question for Orion and other TT rigs


> Robert & Linda McGraw K4TAX wrote:
>
>>In conclusion, if you have RFI issues, it's not the radio's fault.
>>
>>73
>>Bob, K4TAX
>>
>>
>>
> Bob,
>
> I respectfully  disagree with your statement above. It seems to be waaay
> too much of a generalization. I have had several 100 watt radios in the
> same physical location with the same antenna (i.e., the *only* variable
> was the radio) and some radios experienced RFI and some did not.
> Unfortunately, some radios have more ferrite beads or bypass capacitors
> than others, others may have a "floating" audio ground (the dreaded "pin
> 1" syndrome), etc, etc. I don't think you can say "it's not the radio's
> fault" in every case.
>
> 73,
> Carter K8VT
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