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Re: [Amps] HF 30 dB Coupler

Subject: Re: [Amps] HF 30 dB Coupler
From: sm0aom--- via Amps <>
Date: Tue, 15 Jun 2021 21:29:27 +0200 (CEST)
List-post: <>
If money is no object, the Werlatone series of dual directional couplers are
very good.

I am using the C5425 50 dB 1200 W coupler in a transmitter spectral purity 
test setup and am quite pleased.

The flatness in the 5-150 MHz range is in the +/- 0.2 dB region, and the 
coupling accuracy about what could be reliably measured using a Rohde&Schwarz 
in the order of 0.5 dB. The directivity is better than spec, about 30 dB 


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Datum : 2021-06-15 - 21:12 ()
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Ämne : Re: [Amps] HF 30 dB Coupler

Werlatone model C10568 fits your requirements; 30 dB coupling, flat (+/- 0.5
dB) over 1.5 through 32 MHz, 1500 Watts CW, and a directivity of 25 dB. You
won't like the price, but this model shows that a coupler could be crafted
by a hobbyist with the proper design. It's dual directional too, so you
could obtain a VSWR measurement if you wanted it.
Doug, W6DSR

-----Original Message-----
From: Amps [] On Behalf Of Richard Solomon
Sent: Monday, June 14, 2021 17:12
To: Amplifiers <>
Subject: [Amps] HF 30 dB Coupler

Looking for an HF (3-30 MHz) Coupler
for rf measurements. HB or commercial
will do. Accuracy is not important but
flatness would be a concern.

30dB port would do.

Any suggestions ?

Tnx, Dick, W1KSZ
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