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Author Topic: Should I use CW or RTTY To tune?  (Read 3299 times)
W1QJ
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Posts: 1459




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« Reply #15 on: December 02, 2010, 05:19:18 AM »

AF2O, You might want to check and see what your idle current is with the amp in transmit with no drive.  If it is too low, you will want to short out the zener diode to raise the idle current.  Usually at 3000v the 3-400 is 0 bias.  Please run that test and let me know what thew idle current is.  If it is like 50 or 60 mills you will have to short out the zener.  Then if you get 3-500's then remove the short.  Lou
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W3LK
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Posts: 5639




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« Reply #16 on: December 02, 2010, 07:29:11 AM »

I use a dead carrier for tune-up.

Since I have long ago marked the Plate and Load dials on my 80A, I set the dials, give it 100w, touch up for max output, increase the loading a smidgen, and then drop the drive back to 85w.

It takes me all of 10 seconds.
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A smoking section in a restaurant makes as much sense as a peeing section in a swimming pool.
KF5CZG
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Posts: 89




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« Reply #17 on: December 02, 2010, 10:38:03 AM »

Same here....I use RTTY.  It is a 100W RF signal with NO frequency shift keying applied.
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RFDOG
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Posts: 18




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« Reply #18 on: December 02, 2010, 10:38:46 AM »

You guys are STILL kicking this around?  Losers.
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