[AMPS] Rf Sampler circuits 10kw wattmetres Rf Ampmeters

[Radiodan W7RF]

Don't forget that 10KW Low Pass Filter!

Gotta keep it clean ya know!
See http://radiodan.com/Henry/Amp_specs/10kw_lpf.htm

73 Dan Magro, RADIODAN W7RF, (member SCDXC)
Henry HF Amps are "Instant on" for RF Power now!
Rugged, Reliable HENRY RF Power Amplifiers for LESS!
Trust one of your own, a DXer & Contester.
http://www.radiodan.com    RFpower@radiodan.com
<mailto:RFpower@radiodan.com> A trip to our web site is worth the click!




> -----Original Message-----
> From: owner-amps@contesting.com [mailto:owner-amps@contesting.com]On
> Behalf Of km1h@juno.com
> Sent: Sunday, September 27, 1998 11:30 AM
> To: amps@contesting.com
> Subject: Re: [AMPS] Rf Sampler circuits 10kw wattmetres Rf Ampmeters
>
>
>
>
> On Sat, 26 Sep 1998 20:24:47 -0700 (PDT) igor rosky <irosky@yahoo.com>
> writes:
> >
> >
> >Can anybody help me with a circuit for a high power Rf sampler for
> >scope and spectrum analyser measurments.
>
>
> If you are only looking for RF and not frequency dependent accuracy a
> simple directional coupler line sampler can be built. You can design the
> sample port for just about any level you want.
>
> Take a look at the old "Millimatch" SWR circuits in 70's era ARRL
> Handbooks....also used in the Heath SB-200. The diode section can be used
> as a tuning indicator and you would tap off from the RF side with a
> suitable capacitor for sampling.
>
> Another option would be to tap off directly from the Load cap with a
> capacitor made from 10KW coax. You would have to experiment a bit to find
> a value that covers your frequency range.
>
>
>  Bird has one but only handles
> >low power.  Secondly why has Rf ampmeters lost favor for measuring
> >high power RF. I need to measure power at 10kw plus, a Bird solution
> >seems expensive, but a Rf ampmeterc would work quite well and
> >accurately, am i missing something
>
>
> I have not seen a high power RF ampmeter since my 1960's Navy days.
> There are many non-catalog Bird line sections and elements that show up
> on the surplus market. 10KW 2-30MHz is quite common. They often have EIA
> flanges with adaptors to type LC connectors for RG-17 type coax.
>
> 73   Carl   KM1H
>
>
>
>
> >
> >
> >Igor
> >
> >
> >
> >_________________________________________________________
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> >
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> >
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