[Amps] amp. Pi-L tuning question

R.Measures r at somis.org
Tue Nov 25 02:56:03 EST 2003



>Sir:
> I wonder if you or some members here could help me with set-up problem or 
>point me to some place to find the information I need?
>Some time ago I built a 4-1000 linear amplifier with tuned input and Pi-L 
>output.  The tuned inputs is good, and after many hours of trial and error 
>tuning the output network, I have the 40 meter band tuned very well, and 
>the 20 meter band somewhat close.  Now to my problem.  I have acquired an 
>H/P 8601A sweep generator(50 ohm output) and also have an H/P 606 signal 
>generator for centerfrequency marker, as well as a Millen grid dipper and 
>a tektornix 547 scope.  I would really like to be able to set the 
>remaining bands using the sweep generator/scope as I think it could make 
>tuning the Pi-L much easier, 

**  For G-G, apply full drive,  tune for max output, and one is done.  
What could be easier?.

>plus learning something new.  Unfortunatley I 
>don't know how to set-up the sweeper to the amplifier output network to do 
>this.  

**  Neither do I. 

>I think where my efforts have failed is with the matching the 
>sweeper to the 4-1000 plate, or to the network itself.  If you or one of 
>your readers could help me to do this or perhaps tell me where I could 
>find this information I would really appreciate it...
>thank you for you time...H. B. Moore...w4lcn...


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