>
>
>-----Original Message-----
>From: Ian White, G3SEK <G3SEK@ifwtech.com>
>To: amps@contesting.com <amps@contesting.com>
To: <amps@contesting.com>
>Date: 27 March 2001 19:05
>Subject: Re: [AMPS] SB-220 Amplifiers and Garage Sales!!
>
>
>>
>>Rich Measures wrote:
>>>>
>>>>Is it quite that simple? The suppressor is part of a *series* circuit
>from
>>>>the anode through the blocking cap, connecting wires and tune cap so Rs
>is
>>>>the number that counts. In a typical layout, the connecting leads swamp
>the
>>>>Ls (and therefore Lp) of the suppressor.
>>>>
>>>What is "Ls" and "Lp" Steve?
>>
>>When this show was playing about two years ago, we went through all this
>>stuff about equivalent series and parallel resistances and reactances:
>>Rs, Rp, Xs, Xp and all their friends and relatives.
>>
>>You must get around to replacing that memory backup battery, Rich...
>>
>>73 from Ian G3SEK
>
>If Lp and Rp are the equivalent parallel resistance and inductance of a
>network, then Ls and Rs are the equivalent series resistance and inductance.
>At any frequency, you can describe and L/R combination in either way. You
>convert between them according to which matches the circuit topology at the
>point you are analysing.
>
>73, Steve
... from "Calculating Power Dissipation in Parasitic-Suppressor
Resistors", March, 1989
*QST*, page 7, 'Finding Impedance by Solving for Admittance'. .® The
American Radio Relay League, Inc. The conversion process is also
described at Figure 18 on my Web site.
cheers
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
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