[TenTec] Tentec Omni D no (low) power output

Mike Bryce prosolar at sssnet.com
Fri Feb 10 15:07:29 PST 2012


Without digging into it deeper, unplug the pa from the driver board and see if the 2 watts you're seeing is the driver and not the PA. You need to reroute the driver to the filter board or terminate it with a 50 ohm load and measure power across the load

mike, wb8vge

On Feb 10, 2012, at 5:51 PM, Scott Sheppard wrote:

> Well, I picked up a real lemon on ebay that I am trying to bring back to life...at the moment my focus is on teh power output--or lack of it. I manage about 2 watts or less on all bands and never more than 3.5 amps draw even with drive full on...so the low level driver is doing its thing anyway. When I checked at the PA terminals (the feed thru posts to the PA) the voltages all checked within range so its 'inside the PA...I took it off the rig and had a look in the hopes something obvious would present itself but no luck.
> 
> My question is, howw do I go about checking the PA now...can I test the transistors in circuit? I am hoping it is the 2nd stage of amplification and not the actual finals themselves as 2 watts is surely just the low level driver so perhaps its the MRF 476's?
> 
> 73
> 
> scott  VA3IED
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