[Amps] Fwd: Re: [Spam] Re: 833A

[Bill Fuqua]

>
>
>This is grid swamped grid driven. Actually you would get better gain with 
>cathode drive.  The cathode impedance should be between 200 and 300 ohms ( 
>i am guessing) and would require less power after matching than the 50 ohm 
>swamping resistor to get the same voltage swing and you should be able to 
>operate it on 40 and 20 meters.
>
>73
>Bill wa4lav
>
>
>At 10:24 AM 3/2/2009 -0500, Robert Perdue wrote:
>>www.mines.uidaho.edu/~glowbugs/tx/Universal%20Amp.pdf
>>
>>Found this article it is grid driven. If the link does'nt work do a Google
>>for  a universal three band amplifier
>>
>>73,Bob
>>
>>----- Original Message -----
>>From: "Bob Maser" <bmaser at tampabay.rr.com>
>>To: "Robert Perdue" <kc0hfl at cox.net>; "Edward Swynar" <gswynar at durham.net>;
>><Amps at contesting.com>
>>Sent: Monday, March 02, 2009 9:16 AM
>>Subject: Re: [Amps] 833A
>>
>>
>> >I would be interested in seeing that article.  I looked in my 1978 
>> handbook
>> >and it's not there.
>> >
>> > Bob W6TR
>> > ----- Original Message -----
>> > From: "Robert Perdue" <kc0hfl at cox.net>
>> > To: "Edward Swynar" <gswynar at durham.net>; <Amps at contesting.com>
>> > Sent: Monday, March 02, 2009 2:55 PM
>> > Subject: Re: [Amps] 833A
>> >
>> >
>> >> Thanks Eddy, I will take a look at those years. It may be from there it
>> >> does
>> >> have a hand wound plate choke.
>> >>
>> >> 73,Bob kc0hfl
>> >> ----- Original Message -----
>> >> From: "Edward Swynar" <gswynar at durham.net>
>> >> To: "Robert Perdue" <kc0hfl at cox.net>; <Amps at contesting.com>
>> >> Sent: Monday, March 02, 2009 6:09 AM
>> >> Subject: Re: [Amps] 833A
>> >>
>> >>
>> >>> Hi Bob,
>> >>>
>> >>> The ARRL HANDBOOK for 1979(?) / 1980(?) featured a low-band amplifier
>> >>> designed around the 833A...even has a HB RF plate choke!
>> >>>
>> >>> ~73~ Eddy VE3CUI - VE3XZ
>> >>>
>> >>>
>> >>> ************************************
>> >>>
>> >>> ----- Original Message -----
>> >>> From: "Robert Perdue" <kc0hfl at cox.net>
>> >>> To: <Amps at contesting.com>
>> >>> Sent: Monday, March 02, 2009 1:18 AM
>> >>> Subject: [Amps] 833A
>> >>>
>> >>>
>> >>>> I acquired an 833A RF deck it is a 40/80M deck the only markings that
>> >>>> may
>> >>> refer to the design is P.J. 2000 on the front panel. Info is a little
>> >>> scarce
>> >>> on this tube as far as rf amps go any ideas of what and when it may have
>> >>> appeared in a handbook or a QST? I would like to at least try it looks
>> >>> cool
>> >>> grounded grid thru a 55 ohm 100w resistor.
>> >>>>
>> >>>>
>> >>>> Bob,kc0hfl
>> >>>> _______________________________________________
>> >>>> Amps mailing list
>> >>>> Amps at contesting.com
>> >>>> http://lists.contesting.com/mailman/listinfo/amps
>> >>>>
>> >>>
>> >>>
>> >>
>> >> _______________________________________________
>> >> Amps mailing list
>> >> Amps at contesting.com
>> >> http://lists.contesting.com/mailman/listinfo/amps
>> >
>>
>>_______________________________________________
>>Amps mailing list
>>Amps at contesting.com
>>http://lists.contesting.com/mailman/listinfo/amps