>
>I agree, a single 4-1000A with 4 to 6 KV on the anode and a broad-band
>input circuit will drive very nicely with 75 to 100 watts.
In G-G, a broadband input is not a substitute for
individual pi tuned inputs.
>A driver
>will be a lot of trouble and produce the likely hood of poor IMD
>products.
>
>Regarding more power, I suggest the use of a 4CX10,000 if more is
>needed. Of course, you'll be exceeding all the regulations with regard
>to amateur power regulations.
? One can run a 4CX10,000 at c. 1300w out simply by backing off on the
microphone gain until the anode current doesn't increase during
modulation. This is Class A. No retuning is necessary. However, if
interlopers try to take over the freq., increase mic. gain. note -- It
is not legal to use more power than is necessary to communicate.
>As a matter of fact, a single 4-1000A
>will also be capable of exceeding amateur power regulations and still be
>clean as a whistle.
>
>73
>Bob K4TAX
>
>Jan.E.Holm@telia.se wrote:
>>
>> No need for buffer stage. With 5-6 kV on 4-1000A it will put
>> 2.5 to 3 kW without no problem. If more power is wanted just
>> add another 4-1000A and there will be another 3 dB of power.
>> It´s just messy and tricky to run a driver, I´ve tried it and
>> didn´t
>> like it.
>>
>> / SM2EKM
>>
>> PS: Best would probably be a dual 4-1000A driven by a 100 W
>> exciter, in this case no ALC over shot from exciter will cause
>> amp flattoping and splatter etc etc, there will be plenty of elbow
>> room inside the possible envelope.
>>
>> --------------------------
>>
>> -----Ursprungligt meddelande-----
>> Från: ToddRoberts2001@aol.com [SMTP:ToddRoberts2001@aol.com]
>> Skickat: den 27 april 2001 01:24
>> Till: amps@contesting.com
>> Ämne: [AMPS] Buffer/Driver Stage for 4-1000 Amp
>>
>> I am planning to use one of those 90-100 watt solid-state rigs to drive
>> a
>> 4-1000 amp project. From what I can gather it appears that to be able
>> to take
>> full advantage of an all grounded-grid/ cathode driven 4-1000 tube ,the
>> driver should be able to supply about 150-200 watts of drive. It would
>> seem
>> the best answer would be to build a buffer/driver stage using perhaps a
>> single or dual 811A tubes that could be driven with maybe 25-50 watts
>> and
>> deliver 100-200 watts of drive to the 4-1000. I was wondering if anyone
>> has
>> ever tried this or any suggestions? How about a pair of 811A's running
>> class
>> A driving the 4-1000 cathode? Thanks for any ideas. 73 Todd Roberts
>> WD4NGG .
>>
>> --
>> FAQ on WWW: http://www.contesting.com/FAQ/amps
>> Submissions: amps@contesting.com
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>>
>> <<Fil: [AMPS] Buffer_Driver Stage for 4-1000 Amp.TXT>>
>>
>> --
>> FAQ on WWW: http://www.contesting.com/FAQ/amps
>> Submissions: amps@contesting.com
>> Administrative requests: amps-REQUEST@contesting.com
>> Problems: owner-amps@contesting.com
>
>
>--
>FAQ on WWW: http://www.contesting.com/FAQ/amps
>Submissions: amps@contesting.com
>Administrative requests: amps-REQUEST@contesting.com
>Problems: owner-amps@contesting.com
>
>
- Rich..., 805.386.3734, www.vcnet.com/measures.
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