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
mid-band
coupling accuracy about what could be reliably measured using a Rohde&Schwarz
VNA,
in the order of 0.5 dB. The directivity is better than spec, about 30 dB
mid-band.
73/
Karl-Arne
SM0AOM
----Ursprungligt meddelande----
Från : doug@dougronald.com
Datum : 2021-06-15 - 21:12 ()
Till : dickw1ksz@gmail.com, Amps@contesting.com
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 [mailto:amps-bounces@contesting.com] On Behalf Of Richard Solomon
Sent: Monday, June 14, 2021 17:12
To: Amplifiers <Amps@contesting.com>
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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