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Product Overview

Aseembled Micro-Power Medium Wave Transmitter Board For Testing Crystal Radio

Detail 

Micro-Power Medium Wave Transmitter Board For Testing Crystal Radio Domestic tps

Video For Radio Sound Performance:
http://v.youku.com/v_show/id_XNDQxNDk1NTEzMg==.html

Electrical Parameters:
- Power Supply: 9V2A DC, 5.5 interface, internal positive and external negative (power supply is not included)
- Transmitting Frequency: 530 ~ 1600KHZ (radio medium-wave band)
- High-Frequency Transmitting Power: Adjustable from 20 mW to 500 mW within 5 to 10 meters.
- Antenna: 5M 1.5 ~ 2.5 copper wire for home uses  
- Audio Input: 3.5mm at both ends
- Audio Source: CD, desktop computer, mobile phone, etc.
- Application: Medium wave radio enthusiasts, for students to study the principle of wireless signal generation and modulation


1: Power Supply (9V. Internal positive & external negative)
2: Audio Input
3: Volume Adjustment
4: Adjust Frequency
5: Adjust Modulation Frequency
6: Antenna Terminal (5M cable for home radio)


Audio amplifier circuit outputs sufficient audio power to modulation circuit.


With collector modulation, this board features small distortion, adjustable amplitude, and excellent sound quality. It is suitable for radio enthusiasts and students' experiment.


Adjust 223 tuning capacitor to change frequency in the range of 530 ~ 1600KHz.


Use and experimental radio transmitters are subject to local radio regulations. Please adjust amplitude knob to minimize power.

1. We ship your  orders within 1-2  business days after  the payment  received.

2. Item shipped via  Singapore Post or  HongKong Post , It  takes about 7-14  business days (USA,CA,AU,UK).others  country 10-20  business  days(Brzil,India,RU),Exact  delivery time  depends on postal  process.

3. If you do not  receive your item(s)  by 30 business  days,Please feel  free to contact us  via ebay mail system  , we will try our  very best to resolve  any problems with  you 

 

1. PayPal payment accepted only.

2. Items will be shipped to your eBay address. Please make sure it is correct.

3. Payment must be received 4 days after auction ended.

1. Customer satisfaction is our top goal. We believe our items are so outstanding. All products are quality checked. They are new and in good condition when shipped to our customers. We are convinced you will be happy with your Purchase.

2. If product is defective or damage upon arrival, or wrong product shipped, please contact us immediately. Returns accepted within 14 days of delivery date and item must be in original new condition, not worn or altered in any way with attached tags & wrap. Otherwise deal is final. Return shipping must be paid by buyer. 

3. Please contact us first if you have any problems/questions/concerns. We will be happy to resolve any issues you may have in a cordial and friendly manner.

4. We appreciate your Postive Feedback, and will do the same in return. DO NOT leave negative feedback without first communication with us. Please allow max 2 business days for us to response. 

When you satisfied with our product and services please leave us positive feedback.

If a problem occurs, contact us immediately with any email request. Just contact us using the " Ask the seller a question" link on eBay. 

DataCaciques