BC band. I do not know the exact power per device but since the newer
devices run around a KW, I would say a 100 in a 100KW TX.
On 4/29/12 4:01 PM, Carl wrote:
> At what frequency and how much power per device?
>
> Carl
>
>
> ----- Original Message ----- From: "W2XJ" <w2xj@nyc.rr.com>
> To: "Carl" <km1h@jeremy.mv.com>
> Sent: Sunday, April 29, 2012 2:17 PM
> Subject: Re: [Amps] Tubes vs. Solid State (was) Expert Amps 2K-FA: Any
> Opinions ?
>
>
>> Commercial solid state amps can easily attain -80 db IMD or better to
>> at least 100 Kw.
>>
>> On 4/29/12 7:19 AM, Carl wrote:
>>> Modern SS devices in the 8877 power class are are not ready for
>>> prime time
>>> in linear service.
>>>
>>> IMD, gain/bandwidth, and derating for our use are still a problem.
>>>
>>> Ive been playing with a couple of Freescale devices at 6M that are
>>> close to
>>> promising but only at 250W.
>>>
>>> Carl
>>> KM1H
>>>
>>> ----- Original Message -----
>>> From: "Joe Subich, W4TV"<lists@subich.com>
>>> To:<amps@contesting.com>
>>> Sent: Sunday, April 29, 2012 9:58 AM
>>> Subject: Re: [Amps] Tubes vs. Solid State (was) Expert Amps 2K-FA: Any
>>> Opinions ?
>>>
>>>
>>>>> I'm an ardent "tube" amp man for this reason. They're significantly
>>>>> more robust and bullet proof in the longevity stakes.
>>>> I don't believe that for a minute if you compare apples to apples.
>>>>
>>>> Most of the tube designs have been significantly "over engineered".
>>>> That is, the tubes have excess plate dissipation for the power output
>>>> and grids that will take a significant beating.
>>>>
>>>> If one looks at amplifiers like the MLA-2500 or Alpha 76 series with
>>>> tubes that have grid dissipation in the 10 watt range and no grid
>>>> protection ... tubes that have become unobtainium ... there are plenty
>>>> of owners that have been reduced to tears at the cost (or lack) of
>>>> replacements. Even the 8877 is not exactly an "unforgiving" tube
>>>> when used in designs that lack proper grid protection and the 3-500Z
>>>> are not safe in an unmodified TL-822.
>>>>
>>>> Given proper design and protection, modern solid state devices will
>>>> last a lifetime unlike tubes that *will* need to be replaced due to
>>>> filament/cathode aging. Transistor amplifiers don't suffer from
>>>> catastrophic arcing and certainly don't represent the electrocution
>>>> danger of tube amplifiers.
>>>>
>>>> There are pros and cons on both sides of the solid state vs. tube
>>>> debate but choose the appropriate amplifying device, operate it
>>>> within its design parameters, keep it cool and provide the proper
>>>> protective circuits and either will provide years of trouble free
>>>> service.
>>>>
>>>> 73,
>>>>
>>>> ... Joe, W4TV
>>>>
>>>>
>>>> On 4/24/2012 9:32 PM, Leigh Turner wrote:
>>>>> It's a pity vendors of solid-state QRO amplifiers don't offer
>>>>> purchasers
>>>>> an
>>>>> accompanying low-cost insurance policy to cover them against the
>>>>> inevitable
>>>>> day when the finals blow up for whatever reason and reduce the
>>>>> owner to
>>>>> tears at the huge expense of carrying out out-of-warranty repairs.
>>>>>
>>>>> I'm an ardent "tube" amp man for this reason. They're
>>>>> significantly more
>>>>> robust and bullet proof in the longevity stakes.
>>>>>
>>>>> Leigh
>>>>> VK5KLT
>>>>>
>>>> _______________________________________________
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>>>> http://lists.contesting.com/mailman/listinfo/amps
>>>>
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>
>
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