No, unfortunately he didn't. ;-)
73,
Jim, N7CXI
Jeff Blaine AC0C wrote:
> Jim,
>
> Did the esteemed author of that series happen to voice an opinion as to
> what would be the "best of all possible worlds for ham service?" Now
> that would be an interesting discussion.
>
> 73/jeff/ac0c
>
> --------------------------------------------------
> From: "Jim Barber" <audioguy@charter.net>
> Sent: Thursday, May 06, 2010 3:20 PM
> Cc: <amps@contesting.com>
> Subject: Re: [Amps] 5CX1500A
>
>> A text-searchable DVD set returns:
>>
>> "Notes on the Eimac 5CX1500A power pentode"
>> Arthur Reis, K9XI
>> Ham Radio, August 1980, pp61,62
>> Text-only article, mostly anecdotal notes
>>
>> - article describes some early production problems with tubes made
>> between 1975 and 1979 (check your date code)
>>
>> - author recommends loading tube as heavily as possible (!?) and not
>> exceeding 6000 ohms plate impedance
>>
>> - typical cautions on *not* bumping filament voltage to try to increase
>> emission. (note the author claims 0.25V over-voltage will reduce life by
>> half!)
>>
>> - author claims Henry used the tube in their 4K model
>>
>> - overall, author was rather lukewarm about using the tube in amateur
>> service. Nothing stated about IMD performance.
>> "The 5CX1500A may not be the best of all possible worlds for linear
>> amplification in the Amateur service"
>>
>> HTH,
>> Jim, N7CXI
>>
>> Chris Pedder wrote:
>>> While I cannot pretend that my search was comprehensive, the only
>>> 'similar' thing I could find was a 4CX1500B amplifier described by
>>> W6HHN on page 56 of the April 1971 issue. I could find nothing on the
>>> 5CX1500A.
>>>
>>> Perhaps somebody else can do better.
>>>
>>> Best wishes,
>>>
>>> Chris G3VBL
>>>
>>>
>>> At 18:39 06/05/2010, Patrick Barthelow wrote:
>>>
>>>> If you can find someone's digital files copies of HAM RADIO
>>>> MAGAZINE, they did a feature article about the 5 CX-1500A sometime I
>>>> think in the Mid 80s.
>>>>
>>>> Best Regards,
>>>> 73, de Pat Barthelow AA6EG
>>>>
>>>
>>>
>>> _______________________________________________
>>> Amps mailing list
>>> Amps@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/amps
>>>
>> _______________________________________________
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>>
>
>
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