[Amps] Output choke - Calculation

[Máximo EA1DDO_HK1H]

Hi all,

Now I have more clear the idea.

Thank you to all of you

73, Maximo

                                               


> From: km1h at jeremy.mv.com
> To: k8ri at rogerhalstead.com; amps at contesting.com
> Date: Thu, 17 May 2012 08:18:32 -0400
> Subject: Re: [Amps] Output choke - Calculation
> 
> The ones used on most amps is 1 to 1.5mH, 100-300ma
> 
> Carl
> KM1H
> 
> 
> ----- Original Message ----- 
> From: "Roger (K8RI)" <k8ri at rogerhalstead.com>
> To: <amps at contesting.com>
> Sent: Thursday, May 17, 2012 4:25 AM
> Subject: Re: [Amps] Output choke - Calculation
> 
> 
> On 5/17/2012 3:52 AM, Máximo EA1DDO_HK1H wrote:
> > Hi all,
> >
> > Just a quick one.
> >
> > How to calculate the output choke?
> > (I mean, the coil at antenna output to groud, to install in a homebrew 
> > amplifier)
> It just needs to be a very high resistance at any operating frequency,
> bleed static to ground, and hopefully trip the PS out if the plate
> blocking cap goes.
> The general consensus is that the old 2.5 mH probably would blow open in
> such a case?
> 
> > I don´t know if it is frecuency related and/or power related.
> 
> Neither.  if you are asking about the power output of the amp.
> It should have enough current handling capability to cause the PS to
> blow a fuse or shut down in case the blocking caps fail.
> I don't think I missed anything.
> It's only function in an amp is to get the plate voltage from ever
> getting to the coax connector and hence to the antenna if the blocking
> caps fail.
> 
> 73
> 
> Roger (K8RI)
> How to know how many uH is correct? Any software or table to get the
> right value? Thank you 73, Maximo - EA1DDO
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