B-Tech AMP-U25 Amplifier | 20-40W Power Boost for UHF (400-480MHz) | Compatible with Handheld Radios | Amplifies Analog and Digital Modes | Ideal for Mobile, Field, & Home Use

Haven’t had a chance to test the power output yet, but I bought all three bands. Thanks BTECH! Keeping the bands separate allows for frontend and backend filtering to be unique for each band, as an engineer I really appreciate this aspect. I will post again photo once I have the triplexer bandpass filtering attached to the backend of a stack of all three of these, this will allow UV 5 and the like with poor filtering to latch onto signals with higher gain from base station antennas (selectivity/rejection), and actually benefit from better antennas, with a much smaller amount of attenuation on the front to keep them from becoming overwhelmed lol. Note: all radios exhibit this to some degree and can benefit from additional filtering, even superhet frontend radios. **UPDATE all amplifiers tested fine for power, from 20/25w VHF (my radios have lower power there most do) to 70w on 444mhz UHF!. Anyone having issues and or blowing these is probably unlicensed because if you were you would know SWR being too high will do that to any gear, it’s pretty low for these (1.5 max in the manual) just test antennas and be careful the UT-72 Nagoya they recommend is 1.1 on UHF but 2.2 on VHF, so WILL damage the AMP V25. I will post again if I check these bad boys for spectral purity.

This thing really performs. Get ready to turn all your handheld radios into a mobile or base. I would recommend this product as durable and quality. Get great report back on my signal. What are you waiting on get one

This has helped me greatly when used with a gmrs application. Has extended my range to 20-30 miles. Very good product.

Bought this to work with my Baofeng F8HP 8w handheld. As the input for the radio only specifies 2-6w, I have done testing with both 1w input and 8w input (the only two modes that radio supports) and it works flawlessly with both. I am not sure if it puts out different amounts of wattage though, as I do not have a meter to test with. Setup is very easy - the included hand mic sounds awesome with it. The setup I used was the reverse SMA to SMA adapter in my radio, the the SMA cable to the input on the amp. Then I ran the control cable to the radio from the amp, and plugged the hand mic into the amp and used that for PTT. It sounds great! The only 2 downsides to this unit are the amount of extra cabling you need if you want to use the external mic (which I'm not knocking it, that is the primary design, it just becomes cumbersome next to a standard mobile), and the fact that the speaker is bottom firing, which in my car makes it very quiet. There is no line out to hook up into a seperate speaker. If there was, I believe this product is worth every bit of 5 stars.

In general, I'm happy with the ease of setup. I hooked up a UV-5R and tested the output power of the btec amp unit. The most that I could get out of it is 14 watts. That's a far cry from 30 to 40 watts that is advertised. I started the process of an exchange for another one. Hopefully it's just a defective unit and not all of them underperforming like that. I will update this review when I get the new unit **Update** I received the new unit. I tested it. It does preform as advertised. I'm happy with the item.