Transmitter LOAD control

[Pete, WA2CWA]

Was doing some errands and was driving back home around 1:30 PM today and the temp gauge that reads outside temps, said 105. It think Newark, NJ and New York City both hit 103 today. At 9:27 PM tonight, temp in central NJ is 90 degrees with a feels like of 96 degrees.

[Steve - WB3HUZ]

Please provide some documentation comparing the Pi and Pi-L networks in identical setups for HF operation and the prodcedures for finding the sweet spot. If requesting such valuable information is causing trouble, so be it.   Even troublemakers want to tune their amps properly.  

Yes. There is no improvement in IMD when using a Pi-L network. Any amp can be loaded more heavily to the point where IMD is minimized. But the Pi-L provides no documented improvement.

Wrong, #1 AM Phone trouble instigator

IMD5 especially can be improved using a Pi-L network. The "sweet spot" tuning can be better achieved with microwave PAs using one.

We do it all of the time.

[Steve - WB3HUZ]

Yes, IMD. I've never seen any documentation that the Pi-L improves IMD. I'm sure Brian will post some here soon.

But the Pi-L provides no documented improvement.

AM broadcast uses Pi-L for 2nd harmonic reduction improvement. (unless you were just refering to IMDs!)


Pi-L and Pi output Networks

[WD8BIL]

Yes, IMD.

Cool