[Amps] Homemade attenuator or sampler for 1+kW?

[Steve Katz]

Hi Ilka,

I've used this specific model (778D) for several years at 1 kW PEP SSB or CW
without any ill effects.  There's nothing active in it, and the internal
pass-through conductor is large; I cannot envision what about it would
restrict the power rating.  

WB2WIK/6

"Each success only buys an admission ticket to a more difficult problem." --
Henry Kissinger

> -----Original Message-----
> From:	ilkka.kontola@nokia.com [SMTP:ilkka.kontola@nokia.com]
> Sent:	Thursday, May 23, 2002 11:04 PM
> To:	amps@contesting.com
> Subject:	RE: [Amps] Homemade attenuator or sampler for 1+kW?
> 
> > I use an HP 778D  20dB directional coupler for this application.  1kW
> > applied yields 10W at the -20dB decoupled port, then I just 
> > use an ordinary
> > 20W attenuator (Bird, Narda, HP, whatever -- lots of them 
> > available) plugged
> > into the spectrum analyzer.  
> 
> I thought the power rating for HP 778D is 50 W average 500 W peak. 
> Usually HP peak rating is for 1 microsecond or shorter pulses
> and average power rating is average over one second.
> 
> Thank you for the tip anyway.
> 
> Ilkka OH3NJC
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