SB 200 Output

[Ron Notarius WN3VAW]

Thanks to all that replied to my low output only on 80/75 problem.

Special thanks to both WB6WCW and N4NRW, who both suggested that I look at
capacitors C26 & C27 (which are only switched into the output pi filter on
80/75).  Fortunately, I have a "parts" amplifier, so if those are the
culprits, I should have "spares."  Surgery tentatively scheduled for an
upcoming evening this week!

73, ron wn3vaw

'If tin whistles are made of tin, what do they make fog horns out of?'
-- from "Does Your Chewing Gum Lose It's Flavor on the Bedpost Overnight?"
Lonnie Donegan, SK, 4 November 2002

----- Original Message -----
From: "Ron Notarius WN3VAW" <wn3vaw at fyi.net>
To: <HEATH at LISTSERV.TEMPE.GOV>
Sent: Saturday, November 16, 2002 11:20 PM
Subject: SB 200 Output


I have unusually low power output on my SB 200 on 80/75 meters.  100 Watts
drive gives me ~700 W out on 40-15 (my rig doesn't give me 100 out on 10,
that's another story) but only 120 W out on 3.5 MHz, 200 - 250 W out on 3.8
MHz, and 300-350 W out on 3.99 MHz.

I had it open to put in new finals a few days ago, and no change, so I don't
think it's the tubes going soft.  Any suggestions on where to look next?

73, ron wn3vaw

'If tin whistles are made of tin, what do they make fog horns out of?'
-- from "Does Your Chewing Gum Lose It's Flavor on the Bedpost Overnight?"
Lonnie Donegan, SK, 4 November 2002

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