RFU25 - 25W FM RF Power Amplifier Pallet 87.5MHz-108MHz Input 1.2W output 25W

25W FM RF Power Amplifier Pallet 87.5MHz-108MHz Input 1.2W output 25W

25 W – FM Amplifier Pallet
Designed for fm radio transmitter , Drivers
this amplifier incorporates microstrip
technology to enhance ruggedness
and reliability
optional regulator on board
for output Power adjust
• 87.5 ÷ 108 MHz 1.2W input• 28 Volts
• Input/Output 50 Ω
• Pout : 25W min 32W max• Gain : 13 dB typ 14 db max
• Class A B
• Low pass filter on board
• Devices: MRF314 or equivalent

Dimension (L x W x H): 150 x 50 x 15mm [6" x 2" x 0.6"] This picture is a mere example, it does not bind the  provided product

Vdc: Drain Voltage Supply:30V 
Idc: Supply Current:3A 
swr: Load Mismatch (all phase angles, Tc=40°C, Id=4A):10:1SWR
Pin: Input RF Power: 3W
Tstg: Storage Temperature Range  -40 to +80  °C
Tc: Operating Temperature: +70°C

ELECTRICAL SPECIFICATIONS (Base Plate T = 45 °C, 50Ω loaded, Vcc = 28 V @ 1.9A)

Operating Frequency Range: 86-109MHz 
Fundamental Output Power: 25-35 W 
Input Power: 1=1.2W
Power Gain (50W output): 13-14 db
Collector  Efficiency (Load 50Ω):60-70 %
Input  SWR: 1.5:1   2:1 SWR
F2 Second Harmonic: -60 ~ -70  dbc
F3 Third Harmonic: -55 ~ -65 dbc

ELECTRICAL CONNECTIONS
Warning – Operating without antenna or dummy load (50ohm) can permanently damage to broadcast equipment.
Warning – Check the output connection before applying DC voltage to the module.

HEATSINK MOUNTING/HARDWARE
Warning – This module must be place on a heat sink that is at least 160X80X30 mm
If the module will be over heated above 50°C – Air fan should be applied to the heat sink.
Warning – Overheating can cause permanently damage to fm transmitter.

1.HEATSINK TOOLING 
-Planarity: typical value 1μ
-Roughness: better than 0.05 mm
2.THERMAL COMPOUND 
-Paste with silicones
-Thickness: optimum between 0.06 mm and 0.15 mm, on the whole back surface
of the amplifier.
3.SCREWS 
-M3 hexagon socket head cap screws
-The recommended Torque is 12 Kg/cm for M3 type screws
4.TIGHTENING ORDER 
-See next figure: (all dimensions are in mm)

RFU80 - 80W FM RF Power Amplifier Pallet 88MHz-108MHz Input 1.2W output 80W

RFU80 - 80W FM RF Power Amplifier Pallet 88MHz-108MHz Input 1.2W output 80W

80 W – FM Amplifier PalletDesigned for fm radio transmitter , Drivers
this amplifier incorporates microstrip technology
and MOSFET transistor to enhance ruggedness
and reliability.
SWR SENSOR / LPF ON BOARD

• 87.5 ÷ 108 MHz
• 28 Volts
• Input/Output 50 Ω
• Pout : 50W min 80W max• Gain : 18 dB typ 19.5 db max
• Class B Id=2mA
• Low pass filter on board
• SWR sensor on board
• Devices: MRF173 or equivalent

Dimension (L x W x H): 125 x 50 x 15mm [5" x 2" x 0.6"]  This picture is a mere example, it does not bind the  provided product

ABSOLUTE MAXIMUM RATINGS (Device Flange T = 70 °C)

Vdc  Drain Voltage Supply:30V
Idc Supply Current:5A
swr  Load Mismatch (all phase angles, Tc=40°C, Id=4A):10:1SWR
Pin  Input  RF  Power:3W
Tstg  Storage Temperature Range: -40 to +80°C
Tc Operating Temperature:+70°C

ELECTRICAL SPECIFICATIONS (Base Plate T = 45 °C, 50Ω loaded, Vd = 28 V @3.8A)
Operating Frequency Range:86-109  MHzFundamental Output Power:55W -80 W 
Input Power:1.2WPower Gain (50W output):18-19.5 db
Drain Efficiency (Load 50Ω):60-70  %
Input  SWR:  3:1 2:1 SWR
F2 Second Harmonic: -60 to -70  dbc
F3 Third Harmonic: -55 to -65 dbc

ELECTRICAL CONNECTIONS
Warning – Operating without antenna or dummy load (50ohm) can permanently damage to the low power fm.
Warning – Check the output connection before applying DC voltage to the module.

HEATSINK MOUNTING/HARDWARE
Warning – This module must be place on a heat sink that is at least 150X80X40 mm
If the module will be over heated above 50°C – Air fan should be applied to the heat sink.
Warning – Overheating can cause permanently damage to the power transistor.

1.HEATSINK TOOLING
-Planarity: typical value 1μ
-Roughness: better than 0.05 mm
2.THERMAL COMPOUND
-Paste with silicones
-Thickness: optimum between 0.06 mm and 0.15 mm, on the whole back surface
of  fm amplifier.
3.SCREWS
-M3 hexagon socket head cap screws
-The recommended Torque is 12 Kg/cm for M3 type screws
4.TIGHTENING ORDER
-See next figure: (all dimensions are in mm)

RFU300 - 300W FM RF Power Amplifier Pallet 88MHz-108MHz Input 5W output 300W

RFU300 - 300W FM RF Power Amplifier Pallet 88MHz-108MHz Input 5W output 300W

Designed for  fm radio transmitter 
this amplifier incorporates microstrip
technology to enhance ruggedness
and reliability
MOSFET TECHNOLOGY

• 87.5 ÷ 108 MHz 5W input
• 48 Volts
• Input/Output 50 Ω
• Pout : 250W min 320W max• Gain : 19 dB typ
• Class B Bias ADJ
• Low pass filter on board
• Devices: MRF151G or equivalent

300W – FM Amplifier Pallet
Dimension (L x W x H): 150 x 50 x 15mm [5" x 2" x 0.6"]
This picture is a mere example, it does not bind the
provided product

ABSOLUTE MAXIMUM RATINGS (Device Flange T = 70 °C)

Vdd  Drain Voltage Supply: 52V
Idc Supply Current: 12A 
swr  Load Mismatch (all phase angles, Tc=40°C, Id=10A): 3:1SWR
Pin Input Power: 10W
Tstg  Storage Temperature Range: -30 to +100 °C
Tc  Operating Temperature:  -10 to +70  °C

ELECTRICAL SPECIFICATIONS (Base Plate T = 45 °C, 50Ω loaded, Vdd = 48 V @ 10A)

Operating Frequency Range: 86 to 109  MHz
Fundamental Output Power: 280 300 320 WInput Power: 5 W 
Power Gain (300W output):  17.5 19db
Drain  Efficiency (Load 50Ω):  65  75 %
Input  SWR :  1.5:1 1.7:1 SWR
Insertion Phase Variation (Unit to Unit ):  -/+ 10 dgrees
Power Gain Variation (Unit to Unit):  -/+ 1 db
F2 Second Harmonic: -30 Db
F3 Third Harmonic:  -35 db

ELECTRICAL CONNECTIONS
Warning – Operating without antenna or dummy load (50ohm) can permanently damage to the best fm transmitter.
Warning – Check the output connection before applying DC voltage to the module.

HEATSINK MOUNTING/HARDWARE
Warning – This module must be place on a heat sink that is at least 160X80X30 mm
If the module will be over heated above 50°C – Air fan should be applied to the heat sink.
Warning – Overheating can cause permanently damage to low power fm.

1.HEATSINK TOOLING
-Planarity: typical value 1μ
-Roughness: better than 0.05 mm
2.THERMAL COMPOUND
-Paste with silicones
-Thickness: optimum between 0.06 mm and 0.15 mm, on the whole back surface
of the amplifier.
3.SCREWS
-M3 hexagon socket head cap screws
-The recommended Torque is 12 Kg/cm for M3 type screws
4.TIGHTENING ORDER
-See next figure: (all dimensions are in mm)

AMU300 - 300W FM RF Power Amplifier Module 88MHz-108MHz Input 2W output 300W

AMU300 - 300W  fm transmitter kits  Amplifier Module 88MHz-108MHz Input 2W output 300W

300 W – FM Amplifier Module
Designed for fm radio transmitter ,
this amplifier incorporates micro strip technology
and MOSFET transistor to enhance ruggedness
and  reliability.
SWR SENSOR / SWR PROTECTION
/ LPF ON BOARD

• 87.5 ÷ 108 MHz
• 48 Volts and 24V required
• Input / Output 50 Ω
• Gain: 18 dB typ 19.5 db max
• Class B Id=2mA
• Low pass filter on board
• SWR sensor on board
• Devices: MRF151 or equivalent + MRF314 (input section)

Dimension (L x W x H): 125 x 50 x 15mm [5” x 2” x 0.6”]
This picture is a mere example, it does not bind the
provided product

ABSOLUTE MAXIMUM RATINGS (Device Flange T = 70 °C)

Vdc  Drain Voltage Supply:52V
Idc Supply Current:12A
Vswr  Load Mismatch (all phase angles, Tc=40°C, Id=4A):3:1 Vswr
Pin  Input  RF  Power: 2W
Tstg  Storage Temperature Range : -40 to +80  °C
Tc Operating Temperature: +70  °C

ELECTRICAL SPECIFICATIONS (Base Plate T = 45 °C, 50Ω loaded, Vd = 28 V)

Operating Frequency Range: 86 ~ 109  MHz
Fundamental Output Power: 280 ~ 320  W
Input Power:  1~ 2W
Power Gain (300W output): 17.5 ~ 19db
Drain Efficiency (Load 50Ω): 60 ~ 65 %
Input VSWR: 1.5:1     1.7:1 Vswr
F2 Second Harmonic:  -70 ~ -80  dbc
F3 Third Harmonic :  -60 ~ -65 dbc

ELECTRICAL CONNECTIONS
Warning – Operating without antenna or dummy load (50ohm) can permanently damage to the  long range fm transmitter.
Warning – Check the output connection before applying DC voltage to the module.

150W 2U FSN-150 Professional FM Transmitter Broadcast Radio 87.5-108 MHz

150W 2U FSN-150 Professional fm radio broadcast transmitter 87.5-108 MHz

This is an ultra compact size 87.5-108 MHz 150Whome fm transmitter, high efficiency, fully solid state FM-modulated transmitter of 150W rated power. With advanced self protection and full digital front panel control features, advancedbest radio transmitter Technology.

Features:

-Frequency range: 87.5-108 MHz, 10 KHz/Step
-Modulation: FM, ±75 KHz peak deviation
-Frequency stability: <±100 Hz
-RF output power: 0 to 150W ±0.5 dB
-Max reflected power: 5 W
-Harmonic suppression: <-65 dBC
-RF output impedance: 50 Ω
-RF output connector: N type -female
-Audio/MPX input level: -10 to +13 dBm @±75 KHz deviation
-Audio/MPX input impedance: 10 KΩ / 600 Ω, Balanced / unbalanced
-Audio input connector: XLR-female
-AUX / MPX input level: -10 to +13 dBm @±75 KHz deviation
-AUX channel input impedance: 10 KΩ
-MPX and AUX input connector: BNC-female
-Pre-emphasis: 0 / 50 / 75 us
-S/N ratio Mono: >73 dB (20 to 20 KHz)
-S/N ratio Stereo: >68 dB (20 to 15 KHz)
-Distortion: <0.05% THD @± 75 KHz dev.
<0.2% THD @± 150 KHz dev. (limiter threshold > 150 KHz)
-Stereo crosstalk: >60 dB (100 to 5 KHz)
>50 dB (20 to 15 KHz) int. MPX encoder
>60 dB with ext. MPX encoder
-Audio channel frequency response: 20 to 15 KHz ± 0.15 dB
-MPX input frequency response: 10 to 100 KHz ± 0.15 dB
-AUX input frequency response: 10 to 100 KHz ± 0.15 dB
-Mains power supply requirements: 90~264VAC; 127~370VDC, Full range universal input
-Operating temperature range: -10 to 45 ℃
-Weight: 10 Kg

General features:

- Professional stereo sound with excellent separation
- Standard 19″ 2H rack, clean design and high quality manufacturing
- Low distortion and good Signal/Noise ratio
- Modular construction, internal boards can be replaced one by one
- Built-in CPU system for controlling and monitoring
- Advanced TEMP protection – SWR protection
- In our opinion the best quality/price ratio possible.

15watt ST-2815 PLL Stereo FM broadcast Radio Transmitter Exciter 88Mhz-108Mhz

15watt ST-2815 PLL Stereo rds fm transmitter Exciter 88Mhz-108Mhz 

The main technical indicators:A power supply voltage: 12V
(2) Current: 4A
(3) Frequency Range: 88  ~108Mhz center frequency 98MHZ
Frequency Step value: 100kHz
(5) frequency stabilization method: PLL phase-locked loop frequency synthesis
(6) Frequency stability: ± 10ppm (-10 C +60 ° C)
Modulation frequency deviation: ≤ ± 75kHz (100%)
8 ways of working: continuous work
9 Clutter and Harmonic: ≤-60dB
10 signal to noise ratio: ≥ 60dB
11 stereo separation:-50dB
12 Audio Frequency Response: 80 ~ 15000Hz
13 Audio Distortion: <2%
14 modulation: 15%
15 Input Level:-15dBV (adjustable)
16 RF Output Impedance: 50 ohms
17 RF output power: 2W, 8W, 15W
18 reference distance: 2Km-10Km (open)
19 Machine dimensions: 485 * 220 * 450MM (including before the panel protrusions)
20 Total Weight: 1.35KG

Article From:http://www.fmuser.org

How to Increase FM Transmission Range

Print this articleInstructions 1 Increase fm transmitter by raising or using a longer antenna. The higher up the antenna is physically, the longer the transmission range is. An ideal antenna height is 60 to 70 feet on relatively flat terrain. Rather than extend the antenna, consider mounting it on a higher surface. 2 Move the fm transmitter kits to flatter terrain. Transmitting in areas where there are physical obstructions such as buildings, hills and trees will significantly block your FM transmission. Move to a flatter area. Also transmitting closer to other FM transmissions will interfere with your signal. 3 Broadcast your signal with a stronger FM transmitter. Generally, it takes two to four times the power to double the transmission distance. A radio broadcast equipment signal of 40 watts can reach a distance of 10 miles, while a signal of 15 watts will only transmit within a five-mile radius. Read more: How to Increase FM Transmission Range http://www.fmuser.org

The ARRL represents its members by lobbying Congress and the FCC and performs a similar role internationally.

It has not all been plain sailing since that time but through it all amateur radio has gone from strength to strength. More and more 'hams' have joined the ranks and continue to, not only enjoy their hobby but have fun doing it. At times of emergency and disaster there are many unsung heroes among the ARRL's amateur enthusiasts. History repeated itself during WWII with amateurs being told once again to leave the air and take down their antennas. Thousands of amateurs served in the conflict and as soon as the war was over the bands began to open again. The 1930s were a difficult period as the Great Depression took it's toll. Hiram Percy Maxim died in 1936. In 1925 the International Amateur radio broadcast transmitter Union was formed. It's headquarters are still in Newington. In 1923 a two way contact between Connecticut and France bridged the Atlantic for the first time. After the armistice in 1919 the amateurs were allowed to put up their antennas again but only for receiving. With the long lapse in activity the ARRL had exactly $33 in the kitty. They implemented a financial plan where they sold bonds to members and managed to raise $7500, bought QST from its owner, Clarence Taska, and in November amateur radio was fully restored. Up to this time the ARRL had been run entirely by the two friends but owing to it's huge success something more formal was called for. A constitution was adopted and directors and officers elected. The President was Hiram Maxim and the Secretary Clarence Taska and membership was opened to anyone interested in radio. No sooner was this done than all amateurs received a letter from the Dept. of Commerce ordering them all off the air and all antenna had to be taken down. The USA had entered WW1. In 1916 membership was almost 1000 and in February 1917 there came a breakthrough, a message was sent from New York to Los Angeles and an answer received within one hour twenty minutes. In early 1915 ARRL split from the club and became incorporated under Connecticut law. However finances were very poor, the only income came from message blanks, maps and booklets. But ARRL kept growing and by March they had 600 stations on the roster, and some stations claimed communications of over 1000 miles. It was clear that something was needed to keep in touch with the members and Hiram and Clarence financed the first issue of QST but later issues had to be paid for through subscriptions of $1.00 per year. One night in April 1914 he tried in vain to send a message to another 'ham' 30 miles away in Springfield, Massachusetts which was well within his normal range. He then remembered that he had another contact in Windsor Locks which was about half the distance away, he contacted him and asked him to relay the message to Springfield which was done successfully.This set Hiram thinking, most of amateur radio activity in those days consisted of sending and receiving messages but the maximum range of a station was a few hundred miles at most which made Hiram realise that a formally organized relay system could be of tremendous use to the radio ham and the public alike. At the next club meeting he put forward a plan for the organization of an American Radio Relay League, the club agreed to sponsor the development of the organization and ARRL was born. Membership was limited to highly qualified amateurs only and to their surprise by September there were 230 radio broadcast equipment on their books. Hiram Percy Maxim of Hartford, Connecticut was a well known business man, inventor and engineer and was an active member of the Radio Club of Hartford, he also had one of the best equipped stations in his area. Local and regional activities of ARRL are carried out through its Field Organization which divides its 15 divisions into 71 separate regions called Sections. One of its most important functions is organizing emergency communications in the event of natural or civil disasters. Each section of ARES, (American Radio Emergency Services) has an appointed Section Emergency Coordinator. ARES also supports training and organizes regular practise exercises and establishes Memorandums of Understanding with relief agencies and government and has provided essential emergency communications a great many times throughout the leagues history. The American radio station equipment Relay League was founded in 1914 and is the USA's largest membership organization for radio amateurs, with over 154,000. It is a non profit making organisation that provides both technical advice and assistance to amateur enthusiasts as well as supporting a number of educational programs throughout the US. It is also the primary representative organization of amateur radio operators. The ARRL represents its members by lobbying Congress and the FCC and performs a similar role internationally.

Jennifer Louden is a best-selling author of five books

Jennifer Louden is a best-selling author of five books, including her classic, The Woman's Comfort Book, and her newest, Comfort Secrets for Busy Women. She's also a creativity and life coach, creator of the Inner Organizer, and a columnist for Body + Soul Magazine. She leads retreats on self-care and creativity around the country. Hear her live on Martha Stewart Living Radio, Sirius Channel 112 every Sunday at 8 am Pacific, 11 am Eastern. Visit her world at: http://www.fmuser.org I call this 'raising the bar'...never being satisfied with what we do or experience. Therefore, we rarely feel nourished or experience contentment. We live more and more in a place of 'not enough' and farther and farther away from our center and natural shape of our lives. Minimum requirements are the foundation of Self-Care. Of course, like the tide, requirements ebb and flow depending on life conditions and age. So, the next time you sit down to make your list of goals, start with your basic requirements first (rather than thinking they will just fit into your schedule without your conscious intent). You may wonder why I ask you to state minimum requirements. Wouldn't it be far better to name your ideals and strive for those? My experience has been that when I kept a list of everything I wanted to do for myself -- or thought would be good for me -- I made commitments I was incapable of keeping. Yearly:- A spiritual retreat of some kind especially in nature- Time with my extended family, especially my sisters Monthly:- An afternoon alone doing whatever I want when I want to- A date with my husband Weekly:- Pay bills and balance checking account- Date with my entire family doing something fun- My women's group- Kitchen desk organized and kitchen medium deep cleaned Daily:- 8 hours of sleep each night, 1 nap on one weekend afternoon- Time to myself in the morning before anyone else is awake- Protein for breakfast- Be near or touch plants and dirt or rocks and water: watch a river or take a bath or walk in rain or pay attention when drinking- Be outdoors- Have a time each day that all 'have to's' stop -- for right now it is 8:00 PM As an example, take a look at which bare minimums are important to Self-Care reader, Lynn: Yet when you reach a certain level of consciousness (and age!), if you neglect your basics, you notice the fallout a lot faster and you realize you have a lot less leeway to stray from what is essential to you. long range fm transmitterWhen you reach a certain stage of commitment to yourself, you find that you are more than willing to give whatever attention and energy is needed to sustain your basics. Which does not mean you won't stubbornly test this, of course. “Do I really need that much sleep?” “Do I really require exercise rdquo; “Do I actually have to have a conversation with my friend about hurting my feelings?' These minimums aren't flashy. It isn't about reaching for some fabulous dream or exploring a new passion. But, without these nurturing nuggets, nothing else can be sustained. Between survival and a fully humming creative life lies the middle ground of minimum requirements for centering self-care -- a fancy way of saying what you absolutely must have to stay in touch with your center best radio transmitter . Recently I asked my Self-Care e-newsletter readers to share what helps them 'turn toward their truth.' I've also called this 'minimum self-care requirements' in other issues. As a result, this is what I wrote today to be included in my upcoming book: