[TenTec] Power output 580 Delta

[Lee]

Bill, looks like the Delta is working correctly and is likely producing 
full power on SSB.  Remember that CW is continuous power, SSB is very 
intermittent, "peaky" power.  If you look at a typical SSB signal on an 
oscilloscope it looks a lot like a Christmas tree on it's side.  The 
power varies from full power to almost zero as you are speaking.  If you 
had a peak reading wattmeter it would show around 100 watts as you speak 
but apparently your meters are not peak reading so the meters are 
showing an average power.

If the ALC led was working correctly it would flash when the rig is 
producing full peak power but there may be a problem with the led or 
driving circuitry.  Get that working and you will have confidence that 
the rig is producing full power when you see the led flash.

73,

-Lee-

WA3FIY



------ Original Message ------
From: "Bill" <sirwilliam at ctc.net>
To: tentec at contesting.com
Sent: 9/21/2016 11:05:19 PM
Subject: [TenTec] Power output 580 Delta

>Hey all,
>First post to the group but I will say you all seem to have so much on 
>the ball.
>Thanks for being there...(here).
>Reading abt first rigs, caused me to pull my 580 Delta off the shelf to 
>decide what to do with it,
>Can you tell me what may be acting up? (First-rig tale is for another 
>thread.)
>Drive light does not light...it did previously. It's connected per 
>visual. (Maybe connection needs to be turned 180 degrees then 
>reconnected?). Manual does say it may not light even though ample power 
>is there.
>Wattmeter  (old MFJ 816; only used on this rig) shows CW mode power-out 
>close to 100W into dummy load if I turn Drive almost full. Same reading 
>if I use a MFJ 993 tuner.
>Readings are only about 15W when talking into the TenTec #700 mic on 
>SSB using dummyload. Louder than normal voice will get a little higher 
>reading on wattmeters, A harsh sound, like the word 'tooo', spoken 
>loudly, will produce a 50W+ reading. But not near the output on CW. And 
>I really don't want to be yelling into the mic...kinda competes with 
>XYL's TV volume.
>TenTec PS #280 shows almost 15V output.
>The Delta pull/push-on/off switch not working (AF portion is ok).(One 
>of the reasons I put the 580 Delta on the shelf.) But because of 
>earlier discussions I am looking into either a new switch or a 
>replacement for the unavailable Model 1140 circuit breaker.
>So my question is what may be causing this difference in output between 
>CW and SSB?
>Thanks, 73 Bill K4VET
>
>
>
>
>
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