[Top] [All Lists]

Re: [TenTec] Low (to no) Power Out Omni D--han'nt given up yet

To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] Low (to no) Power Out Omni D--han'nt given up yet
From: Mike Bryce <prosolar@sssnet.com>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Thu, 16 Feb 2012 10:23:24 -0500
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>

Scott, is right.

Although you are getting two watts from the PA, you need to have more from the 

The fact that you're not drawing current indicates you're not making the PA 
work. If you were drawing current and nothing was coming out, then you'd have a 
shorted transistor or two.

It is still possible that you have a failure in the PA, but those transistors 
are a bear to get to.

When an solid state PA is assembled, it's built from the pcb upward like a 
building is assembled from the ground up. If one or both of the transistors are 
bad, then you have to un-assemble the entire PA to get to the bottom 
transistors. It's labor intensive and after you're done, right now it's a crap 
shoot as to wether or not that's the problem.

This weekend I'll pull one of my Omnis out of the pile and measure the LLD 
power into a 50 ohm load and I'll see about getting some wave form photos from 
the scope,

Now, I know this is a long shot, but if you had someone near by with a defunct 
triton 4 the pa is damn near the same as in your omni, a quick swap would tell 
you volumes.


do you own a qrp rig?

disconnect the omni's PA from the LLD and inject 3-6 watts into it from the qrp 
rig. Key the omni and you should see 30 to 60ish watts. (make sure you're one 
the same band!)

what you did would be to use the qrp transceiver as the LLD and allow the PA to 
to its thing. Yeah, there's all kinds of impedances mismatches, but it will 

Mike, wb8vge

On Feb 16, 2012, at 9:53 AM, Rick - DJ0IP / NJ0IP wrote:

> Scott, rather than second guessing, or waiting for Paul to read this thread
> by coincidence and offer suggestions, why don't you compose a list of
> specific questions and call or email them to Ten-Tec.

TenTec mailing list

<Prev in Thread] Current Thread [Next in Thread>