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[AMPS] PI-L network inductor wire sizes

To: <>
Subject: [AMPS] PI-L network inductor wire sizes
From: (Roy Koeppe)
Date: Wed, 10 Feb 1999 10:35:31 -0600
Aren't you the feller who stated on here that a Q=50 was OK??

73,    K6XK
-----Original Message-----
From: <>
To: <>
To: <>
Date: Wednesday, February 10, 1999 12:58 AM
Subject: Re: [AMPS] PI-L network inductor wire sizes

>On Tue, 9 Feb 1999 15:35:42 -0600 "Roy Koeppe" <> writes:
>>L1 has much greater, internal circulating currents than L2 has. With 
>>loaded Q's, L1 could easily have ten times the current of L2.
>>73,   K6XK
>Not likely. If the 50 Ohm current is 5-6A then there would not be any ham
>amps produced that would survive with 50-60A in L1. I would guess 2-3
>times would be more in line with a good design. 
>In my experience with PI-L's it is a voltage breakdown and not current
>heating that destroys many bandswitches.
>73  Carl  KM1H
>>-----Original Message-----
>>From: <>
>>To: <>
To: <>
>>Date: Tuesday, February 09, 1999 3:14 PM
>>Subject: [AMPS] PI-L network inductor wire sizes
>>>  In a PI-L output network, is the RF current the same or different 
>>in the
>>>inductor (L1) and the L inductor (L2) ?
>>>    On the one hand, it would seem that the currents would be the 
>>>the inductors are in series. However on the other hand, since the 
>>is a
>>>stepdown impedance transformer, it would seem that the current in L2 
>>>greater than in L1 due to the transformer action.
>>>    In most of the amp designs that I have seen, the 10 meter portion 
>>of L1
>>>typically is 1/4" tubing and the 10 meter portion of L2 is #12 gauge 
>>>     If the current is the same or greater in L2, why shouldn't the
>>>of L2 be at least as large or larger than that of L1 ?
>>>     Thanks to anyone who can clear this up for me.
>>>  73       Don     K9MUF
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