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| Reviews Summary for ICOM AG-25 external preamp |
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Reviews: 3
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Average rating: 3.7/5
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MSRP: $$149.99
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Description: External, mast mounted preamplifier for 144-148 Mhz
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More info: http://
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write your own review of the ICOM AG-25 external preamp.
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MW0EDX
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Rating: 5/5
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Oct 1, 2008 14:35
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Does the job
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Time owned: 0 to 3 months
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I have 17 m long cable and mounted mine in the shack. Does the job, very nice. No extra DC required.
I also have AG-35 for 430 Mhz. Same - mounted in the shack, also good.
73 !
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K4SAT
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Rating: 5/5
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Nov 26, 2006 18:41
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Excellent Preamp
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Time owned: more than 12 months
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I have the series AG-25, AG-35 and AG-1200. I can say that all three have worked fine for me. I have had no indication of excessive overload. It should be noted that any preamplifier will cause the S meter to rise. If you are using the preamplifier with a very short transmission line this will be more pronounced, and yes, the background noise level will appear higher. However, the preamp noise figure is the important consideration and signal to noise level will improve in almost every case. In my situation the transmission line runs are long, so the preamplifier improves the system noise figure by overcoming the loss of the transmission line. The original reviewer may have had a defective preamp or was experiencing overload from a nearby commercial transmitter (which is a possibility).
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W7RJR
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Rating: 1/5
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Sep 9, 2006 01:55
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Buy a Landwehr
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Time owned: 0 to 3 months
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Installation of this external preamp is straight-forward and self explanatory. Required voltage is supplied by the coaxial cable and special circuitry in the ICOM 910/820H.
While the specs for this unit did not include the noise figure my impression was that it was awful. This preamp delivered about 15 dB of nothing but noise. The noise was so bad that my S/N ratio was actually degraded.
To make matters worse the unit actually failed after several hours of operation. My experience, your mileage may vary.
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