[TenTec] ORION BCI

[n4lq]

Explain how a bad diode causes this. I thought a bad diode would not 
rectify and a good one would. Is it like partially bad? Would this show 
up on an ohmmeter? 
Steve

-----Original Message-----
From: "Stuart Rohre" <rohre at arlut.utexas.edu>
To: "Martin, AA6E" <martin.ewing at gmail.com>, "Discussion of Ten-Tec 
Equipment" <tentec at contesting.com>
Date: Fri, 27 May 2005 13:46:06 -0500
Subject: Re: [TenTec] ORION BCI

> Martin, I did mean in line as series to the antenna connection.
> 
> Clearly, having diodes ahead of an attenuator is going to do no good in
> strong RF fields.   By strong, I mean 3 blocks from a daytime 25 kW
> station
> you can get 10 volts per meter.   That is what we have at the research
> lab
> where I am.
> 
> The diodes are going to conduct after 0.6 volts if silicon, and if no
> series
> resistor raises their ability to conduct.  Then you have non linear
> products
> of all the RF coming in.
> 
> Perhaps there is a bad diode in the protective circuits.  From all the
> descriptions of problems on this one Orion, it sounds like an anomaly.
> There are contesters using Orion with NO problems, they have posted in
> other
> forums.
> 
> -Stuart
> K5KVH
> In our RFI testing, the attenuator goes right after the antenna, then
> the
> receiver circuits.
> 
> 
> 
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