Ramsey SA7 Broadband RF Preamp Kit

by Ramsey

Product Details

• Item Weight: 1.1 ounces
• Shipping Weight: 1 pounds (View shipping rates and policies)
• ASIN: B0002NRKYY
• Average Customer Review: 2.0 out of 5 stars  See all reviews (1 customer review)
• Amazon Best Sellers Rank: #47,962 in Electronics (See Top 100 in Electronics)
• Date first available at Amazon.com: July 21, 2004

Product Description

Put some new life into that old shortwave receiver, scanner, TV set, or frequency counter. This is the famous preamp that's been written up in all the radio and electronics magazines. New low-cost microwave transistors make it possible to give performance unheard of a few years ago! Runs on 9-15 volts at 35mA. It has 50 to 75 ohm impedance and is unconditionally stable. If you've had broadband preamp hook-up problems in the past this unit will be an answer to your dreams! Size: 1"w x 3/8"h x 1 1/2"d. Ramsey Mini-Kits are handy, easy-to-build, easy-to-use functional kits that can be used alone or as building blocks in larger, more complex designs. Mini-kits have been used in projects as simple as blinking name badges or as complex as Radio Astronomy Telescopes. Consider these capable little kits the next time you build.

Customer Reviews

Most Helpful Customer Reviews

3 of 3 people found the following review helpful:

2.0 out of 5 stars Is the ramsey SA7 any good., August 30, 2009

By 

Larry Stein - See all my reviews

This review is from: Ramsey SA7 Broadband RF Preamp Kit (Electronics)

Well to answer the question as to whether the SA7 is any good you have to ask yourself what you want from a preamp? The SA7 is ONLY capable of compensating for loss of signal between your antenna and receiver. Only if you put the SA7 in a long feed line at the antenna will you see any improvement. Plugging this in at the receiver will do nothing or worse, attenuate(weaken) the signal. It will not turn your antenna into an active antenna. If you want an increase of signal and more selectivity pay a lot of money for a bigger, better, higher and maybe even directional antenna and more expensive feed line(coax).
I have also had one of these on my Oscilloscope and signal generator. It gave about 0.05µVolt increase at 20Mhz which does not constitute a +20db increase, more like +4-6db. It is also hampered by nulls about 10, spread out more or less evenly up and down the frequency coverage.

So in conclusion, If your want more, better defined and stronger signals. Don't buy a Ramsey SA7. Buy a better antenna and feed line.