[TenTec] Problem with Orion 2 driving an Ameritron 811H Linear

[Duane Calvin]

Hmm, OK, now I'm stumped.  I ran my Omni VI+ driving a Centaur (also an 811A
amp, but by TenTec), and later driving a Centurion (pair of 3-500Z's).  The
811A amp required a lot more care, but I had no problem driving either of
them to full power (the output section of the Orion is the same as the
earlier Omni VI's).  My Orion had no problem with either the Centurion or
with my current Alpha 99, so I guess I'm stumped here.  BTW, none of these
amp lashups for me required an ALC line between the amp and rig.  All have
run clean SSB and RTTY.  Not sure I know where to go from there.

	73, Duane

Duane Calvin, AC5AA
Austin, Texas
www.ac5aa.com  
 

-----Original Message-----
From: tentec-bounces at contesting.com [mailto:tentec-bounces at contesting.com]
On Behalf Of Tom
Sent: Monday, February 08, 2010 6:47 PM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] Problem with Orion 2 driving an Ameritron 811H Linear

I am using an Ameritron 811H. If I use anymore drive power the linear meter 
current readings are right near the Red Line areas.

Tom

----- Original Message ----- 
From: "Duane Calvin" <ac5aa1 at gmail.com>
To: "'Discussion of Ten-Tec Equipment'" <tentec at contesting.com>
Sent: Monday, February 08, 2010 7:22 PM
Subject: Re: [TenTec] Problem with Orion 2 driving an Ameritron 811H Linear


> What kind of amp are you driving, Tom?  If it's a grounded-grid amp, your
> values aren't that far off (most require full 100W output on the drive to
> reach full rated output.)  If it is, then I'd wonder if you're using the
> same method of measuring power from the rig.  (The Orion's power meter is
> not linear, I've found.)
>
> 73, Duane
>
>
> Duane Calvin, AC5AA
> Austin, Texas
> www.ac5aa.com
>
>
> -----Original Message-----
> From: tentec-bounces at contesting.com [mailto:tentec-bounces at contesting.com]
> On Behalf Of Tom
> Sent: Monday, February 08, 2010 4:29 PM
> To: TenTec at contesting.com
> Subject: [TenTec] Problem with Orion 2 driving an Ameritron 811H Linear
>
> I have found that my Orion 2 (w/ model 709 TT mike) will drive my linear 
> to
> a max. output of 300 watts while providing 40 watts of drive. My IC765 (w/
> the model SM20 mike) will drive the same linear with 35 watts to an output
> of 500 watts. I have switched coax leads, etc. to try to account for bad
> hardware, etc.
>
> As per suggestions from TenTec, I tune the rigs and adjust the linear
> settings using only the CW mode, tried some compression, adjusted the mike
> gain and even increased the
> TX EQ (from zero to -12 ) and nothing increased the ability of the Orion 2
> to provide more than a max. output of 300 watts. Meanwhile, the "good old"
> IC765 cooks along yielding 500 watts for a drive of 30 watts. What 'am I
> overlooking? The only variable I can see is the rigs/mikes. Has anyone run
> into a similar problem or do you have any suggestions as to what I should
> try next?
>
> Will appreciate any input you could provide.
>
> 73,  Tom N3XQ
>
>
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