To: | <amps@contesting.com> |
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Subject: | [AMPS] parasitics |
From: | km1h@juno.com (km1h@juno.com) |
Date: | Sat, 25 Apr 1998 08:39:29 EDT |
On Fri, 24 Apr 98 19:38:38 -0800 Rich Measures <measures@vc.net> writes: >> >>> >>>But a good suppressor should work at 50MHz also. > >If it does not melt down at 50MHz, it is going to not be so very >suppressive at 100MHz. Totally disagree so lets drop that subject since it is going nowhere. . > >>>If the natural parasitic >>>of a 3-500Z is somewhere around 130MHz > >IMO, there is no natural parasitic resonance. The tube has 5pF of >Cout. >Resonance depends on how much L one connects to the 5pF. Various >3-500Z >amplifiers have anode resonances of 90MHz to 155MHz, depending on the >layout. That is the natural resonance I was referring to...sorry if I confused you. > >>>why on earth would you use a >>>suppressor that can barely perform at 28MHz? > >Because a suppressor that is designed to run hot at 28MHz exhibits a >minimal amount of Rp at VHF. Hogwash....up to a point. VHF covers 30-300MHz. You can still build a suppressor that doesn't do a melt down if the components are sized larger. 73 Carl KM1H _____________________________________________________________________ You don't need to buy Internet access to use free Internet e-mail. Get completely free e-mail from Juno at http://www.juno.com Or call Juno at (800) 654-JUNO [654-5866] -- 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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