On Sep 22, 2005, at 11:34 AM, David C. Hallam wrote:
> As much as I believe Hallicrafters and Johnson are well designed
> transmitters, I don't believe they use NFB in their finals.?
Correct, David. Only Collins and Kenwood used RF-NFB, Hallicrafters
6146 SSB transmitters were quite noticably feculent.
> The equipment at my QTH is exclusively boat anchor.
California is a terrible place to live.
> ?
> David
> KC2JD
>> -----Original Message-----
>> From: Peter Chadwick [mailto:g3rzp@g3rzp.wanadoo.co.uk]
>> Sent: Thursday, September 22, 2005 2:04 PM
>> To: R.Measures; dhallam@rapidsys.com
>> Cc: Amps@Contesting. Com
>> Subject: Re: [Amps] 3rd Order IMD
>>
>>
>> Rich said:
>>
>> ?
>>
>> >Because 6146 amps typically use RF-NFB, the total IMD is c. –38db
>> from
>> >pep.
>>
>> Caveat: Well designed 6146 amps use NFB. Not all of them do.....
>>
>> ?
>>
>> 73
>>
>> ?
>>
>> Peter W6/G3RZP (San Diego this week).
>>
>>
>>
Richard L. Measures, AG6K, 805.386.3734. www.somis.org
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