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Synthesized AM Radio Transmitter Kit

by Ramsey

Price: $99.95 + $7.99 shipping
Only 19 left in stock.
Ships from and sold by Ramsey Electronics®.
  • Electronic Kit - Assembly Required
  • Fully synthesized, no frequency drift!
  • Microprocessor controlled
  • Includes AC power adapter and case set
  • Ideal for schools
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Product Information

Technical Details
Brand NameRamsey
Item Weight2.5 pounds
  
Additional Information
ASINB0002NRJBS
Best Sellers Rank #18,582 in Electronics (See top 100)
Shipping Weight2.5 pounds (View shipping rates and policies)
Date First AvailableJuly 21, 2004
  
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Product Description

Run your own AM radio station! The AM25 operates anywhere within the standard AM broadcast band, and is easily set to any clear channel in your area. The design is similar to that of a commercial radio transmitter, so you'll learn how the "big guys" operate. It is widely used by school - standard output is 100 mW, with range up to 1/4 mile, but can be set for higher output where regulations allow. Broadcast frequency is easily set with dip-switches and is stable without drifting. The transmitter accepts line level input from CD players, tape decks, etc. Includes case & knob set & AC power supply.

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Customer Reviews

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Most Helpful Customer Reviews

12 of 12 people found the following review helpful By Mr. Ed on October 4, 2010
Verified Purchase
This is a nice basic little AM transmitter. I found that a scope is handy in making the final adjustments to it since the settings they suggest leave the audio a bit distorted. I was also getting 60 cycle hum in the transmitted audio from the provided, poorly filtered power supply(a standard plug-in supply like you'd get with most electronic devices).
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6 of 6 people found the following review helpful By weirdwartales on June 3, 2013
Verified Purchase
I had been wanting to build one of these for a while to broadcast Old Time Radio shows on my vintage AM radio collection.

ARRIVAL:

Kit was shipped from manufacturer and arrived within specified dates. Packing was good and there was no damage.
Upon inspection, I was surprised to find not only missing instructions, there was no CD with instructions, nor any directions of where to find the instructions. Thankfully they have them posted on their website and I printed them from there. It might be a good idea to tell a customer that you have instructions available online and provide the URL of where they are at.

“Learn as you build” is a nice policy worked into the step-by-step instructions to explain the theory and sections of the transmitter as you are building it. The instructions contained fairly clear steps, but for the beginning builder I think it would have been nice to see photos next to the step-by-step instructions, especially for the electrolytic caps, transistors and diodes. Other kits I have built HAVE had these included and it gives some piece of mind while assembling. The theory for the transmitter and Amplitude Modulation is also covered.

Also, would it be too much trouble for Ramsey to post a good hi-res photo of the PC board when finished? If nothing else something to compare your completed board to one already assembled to double check for accuracy. It might sound nit-picky but in the age of digital photography it’s too easy to make it happen. These instructions reminded me of the old-school Dynaco ones from the 1960s. I also think there should be a section in the instructions showing how to correctly dress component leads, especially for the transistors.
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3 of 3 people found the following review helpful By Electric Wizard on May 16, 2013
Verified Purchase
This kit is very good, easy to assemble if you have some electronics background. The instructions are very well written and easy to understand. It worked the first time I turned it on. It performs very well at 100 milliwatts of power. The sound is very good and the frequency is rock solid. It has problems with overheating and modulation when you step the power to 1 watt according to the instructions. I live outside the USA and don't have to limit the power to 100 mw. I had to install a computer fan to cool it down and a 6 ohm resistor to prevent audio distortion. I am able to push it to about 500 mw without problems. I get a range of half a mile with a 13 meter (38ft) horizontal loaded antenna and a 6 foot copper ground rod. If you are not going to push it to 1 watt I highly recommend this kit! It's perfect for transmitting music to your radios around the house.
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0 of 5 people found the following review helpful By masa on July 1, 2012
Verified Purchase
I ordered from Japan.
I will respond very quickly.
Other products were good products.
Was a good shop.
In addition, you want to buy.
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