>
>Guess the same criticism could be leveled at the 4CX1500B for that matter.
>
In a typical 4CX1500B Class AB1 amplifier, the grid-bias supply has
enough series R to limit grid-diss. to a safe value in the event that the
operator fails to adjust the grid bias to a level that allows no grid
current with max. drive applied.
.
- cheers, Alan
>
>
>-----Original Message-----
>From: Steve Thompson <amps@txrx.demon.co.uk>
>To: RFpower@radiodan.com <RFpower@radiodan.com>; Peter Chadwick
><Peter_Chadwick@mitel.com>; 'amps' <amps@contesting.com>
To: <amps@contesting.com>
>Date: Tuesday, June 15, 1999 2:04 AM
>Subject: Re: [AMPS] 3CX800
>
>
>>
>>
>>-----Original Message-----
>>From: Radiodan W7RF <radiodan@mediaone.net>
>>To: Peter Chadwick <Peter_Chadwick@mitel.com>; 'amps'
>><amps@contesting.com>
To: <amps@contesting.com>
>>Date: 14 June 1999 19:50
>>Subject: RE: [AMPS] 3CX800
>>
>>
>>
>>Peter G3RZP wrote:
>>
>>>
>>> Are these tubes delicate? The local radio club has a 2m
>>amp with one; the
>>> standing current has dropped by a half, and the RF output
>>is way down.
>>> Suspicion is that it got over driven: the amp has no
>>protection. Are they
>>> easy to damage by overdrive?
>>>
>>
>>
>>Delicate?
>>Only a 4 watt grid dissipation! Better not make ANY mistakes
>>at all with
>>this tube!
>>
>>It is one of today's answers to "how do I make it smaller
>>and cheaper or get
>>more profit out of it" amplifiers. Or "gee why can't I have
>>a 2KW amplifier
>>in the size of a cigar box?"
>>
>>-------------------
>>
>>Or could it be that it's designed to have low grid
>>intercept?
>>
>>Steve
>>
>>
>>--
>>FAQ on WWW: http://www.contesting.com/ampfaq.html
>>Submissions: amps@contesting.com
>>Administrative requests: amps-REQUEST@contesting.com
>>Problems: owner-amps@contesting.com
>>Search: http://www.contesting.com/km9p/search.htm
>>
>>
>
>
>--
>FAQ on WWW: http://www.contesting.com/ampfaq.html
>Submissions: amps@contesting.com
>Administrative requests: amps-REQUEST@contesting.com
>Problems: owner-amps@contesting.com
>Search: http://www.contesting.com/km9p/search.htm
>
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
--
FAQ on WWW: http://www.contesting.com/ampfaq.html
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
Search: http://www.contesting.com/km9p/search.htm
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