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Re: Boonton 25A Power Meter Calibrator “error.”

 

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You can use 478A Opt.: h75 / h76 . They starts @1Mhz to 1GHz …?

Ing. Patricio A. Greco
Taller Aeronáutico de Reparación 1B-349
Organización de Mantenimiento Aeronáutico de la Defensa OMAD-001
Gral. Martín Rodríguez 2159
San Miguel (1663)
Buenos Aires
T:?+5411-4455-2557
F:?+5411-4032-0072

On 29 Aug 2022, at 23:18, Steve J. Noll, WA6EJO <sjnoll@...> wrote:

?

Recently someone has been selling brand new Boonton 25A Power Meter Calibrators on eBay at a great price. I picked one up to check my HP 478A mounts and 431C and 432A meters. I find a -5 dB error on all settings! The problem turns out to be that the 25A output (0-100 mW) is at 1 MHz. The 478A mounts are only rated down to 10 MHz and are seriously inaccurate below that.
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