Carl: I pretty much reached the same conclusion. I ordered the Ameritron
choke from MFJ. I understand that it is a bit too long physically and needs
to be shortened a bit (the form - not the coils). We'll see. Thanks for
your note.
Wayne N1WR
--------------------------------------------------
From: "Carl" <km1h@jeremy.mv.com>
Sent: Thursday, January 05, 2012 11:48 AM
To: "Wayne Rogers" <n1wr@chesapeake.net>; <amps@contesting.com>
Subject: Re: [Amps] L4B Plate choke
> Not surprising for a 1000W input amp run at 1200W out. There are
> alternatives on the market that will handle the power and dont park
> resonances too close to a band edge plus cover WARC's.
>
> Carl
> KM1H
>
>
> ----- Original Message -----
> From: "Wayne Rogers" <n1wr@chesapeake.net>
> To: <amps@contesting.com>
> Sent: Monday, January 02, 2012 6:59 PM
> Subject: [Amps] L4B Plate choke
>
>
>>I just opened up my L4B to do some minor work on it. I noticed that the
>>plate choke looks like it has overheated - discolored brown around the
>>middle of it.
>>
>> Wonder if anyone has experienced this - common problem with the L4B? Or
>> a symptom that something is wrong?
>>
>> The amp works fine otherwise - good power out, no sign of parasitics. I
>> do work it hard in contests, and run full power in CW.
>>
>> Wayne N1WR
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