Aren't you the feller who stated on here that a Q=50 was OK??
73, K6XK
-----Original Message-----
From: km1h@juno.com <km1h@juno.com>
To: amps@contesting.com <amps@contesting.com>
To: <amps@contesting.com>
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" <royanjoy@ncn.net> writes:
>>
>>HI,
>>
>>L1 has much greater, internal circulating currents than L2 has. With
>>typical
>>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: JWebs3939@aol.com <JWebs3939@aol.com>
>>To: amps@contesting.com <amps@contesting.com>
To: <amps@contesting.com>
>>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
>>PI
>>>inductor (L1) and the L inductor (L2) ?
>>> On the one hand, it would seem that the currents would be the
>>same
>>since
>>>the inductors are in series. However on the other hand, since the
>>network
>>is a
>>>stepdown impedance transformer, it would seem that the current in L2
>>would
>>be
>>>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
>>wire.
>>> If the current is the same or greater in L2, why shouldn't the
>>conductor
>>>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
>>>
>>>--
>>>FAQ on WWW: http://www.contesting.com/ampfaq.html
>>>Submissions: amps@contesting.com
>>>Administrative requests: amps-REQUEST@contesting.com
>>>Problems: owner-amps@contesting.com
>>>Search: http://www.contesting.com/km9p/search.htm
>>>
>>
>>
>>--
>>FAQ on WWW: http://www.contesting.com/ampfaq.html
>>Submissions: amps@contesting.com
>>Administrative requests: amps-REQUEST@contesting.com
>>Problems: owner-amps@contesting.com
>>Search: http://www.contesting.com/km9p/search.htm
>>
>>
>
>___________________________________________________________________
>You don't need to buy Internet access to use free Internet e-mail.
>Get completely free e-mail from Juno at http://www.juno.com/getjuno.html
>or call Juno at (800) 654-JUNO [654-5866]
>
>--
>FAQ on WWW: http://www.contesting.com/ampfaq.html
>Submissions: amps@contesting.com
>Administrative requests: amps-REQUEST@contesting.com
>Problems: owner-amps@contesting.com
>Search: http://www.contesting.com/km9p/search.htm
>
--
FAQ on WWW: http://www.contesting.com/ampfaq.html
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|