[Top] [All Lists]

Re: [TenTec] Orion

To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] Orion
From: Gary Follett <dukeshifi@comcast.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Sun, 13 Oct 2019 20:36:04 -0500
List-post: <mailto:tentec@contesting.com>
The Ten Tec Orion manual gives you zero alignment instructions.

However, historically,Ten Tec has set a bias currents for their previous radios 
at 500 mA.

This was true for the Corsair, Omni V and Omni VI.

The final amplifier in the Orion is the same circuit as its predecessors so 500 
mA should be a safe bet.

Of course, do then adjustment with no drive signal. The best way to ensure this 
is to remove the input cable to the final amp.

While Ten Tec tells you to put an ammeter in the main 12 volt supply and adjust 
the bias pot to minimum with the radio locked into transmit, then to increase 
it until you see 500 mA more than the baseline current in transmit, I prefer a 
different method.

I disconnect the heavy red wire to the final amplifier and put my ammeter 
between there and the radio. That way I am only measuring the sum of driver 
bias (~4 to 8 mA) and the final. By setting the final bias pot to 500 mA +8 mA 
-0 mA you will get  a better reading.



> On Oct 13, 2019, at 10:18 AM, Byron Cordes via TenTec <tentec@contesting.com> 
> wrote:
> Hello everyone,
> I could use some help. I have a Orion I that’s has a bad final , ordered a 
> match pair from RF Parts.  How much bias current?  Any information is 
> appreciated . Thanks 73s Byron AC9PA 
> Sent from my iPad
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec

TenTec mailing list
<Prev in Thread] Current Thread [Next in Thread>