Post by HighMountainRadio on Mar 14, 2018 12:52:03 GMT -6
FMUserModelFU-25AFMBroadcastTransmitterSpecifications CZH Model CZE-T251, CZH-T251 FM Broadcast Transmitter Specifications
Frequency Range: 87 ~ 108 MHz Frequency Step Value: 100 KHz Modulation: FM (+/- 75 KHz) Frequency Stability: +/- 10 ppm Frequency Stabilization: PLL (Phase Locked Loop) Frequency Response: 50 ~ 15,000 Hz Pre-Emphasis: 50us or 75us Pre-emphasis preset by their Technical Department, Request 75us USA Broadcast Standard at time of order ! RF Power Output: 0 ~ 25 Watts RF Output Connector: 'N' Type Female RF Output Impedance: 50 Ohms Unbalanced Harmonic Suppression: <= -60 db Audio Input Connector: 'RCA' Type Female, 6.5mm Microphone Input Connector Audio Distortion: 0.2% Input Level: <= 15 dbv Stereo Separation: >= 35 db S/N Ratio: >= 70 db Working Environment Temperature: -10 ~ 45 Degrees Celsius RS-232: No Low Pass Filter: No VSWR/Temperature Protection: Yes RDS Capability: No Power Requirements: 12 VDC @ 5 Amps Duty Cycle: Continuous Duty Size: 210mm x 174mm x 59mm
3/14/18 UPDATE !
I have received correspondence today from FMUser.org informing me that the FU-25A FM Broadcast Transmitter may be preset at the FMUser Technical Department for 75us pre-emphasis, the USA broadcast standard ! When placing your order for this transmitter be sure to special request this feature !
3/18/18 UPDATE !
Today, I have received direct correspondence from CZE FM, the manufacturer of the model CZE-T251 FM Broadcast Transmitter. I was informed by them that this model transmitter is pre-set at the factory for 75us pre-emphasis and cannot be switched. For potential USA customers this is terrific news since that it what is highly desired and required anyway !
Additionally, I am in communication with the Technical Staff at FMUser.org to ascertain whether their complete current lineup of FM Broadcast Transmitters may be special ordered, preset to 75us pre-emphasis as well. As soon as I receive confirmation from them I will post that information here on this forum ! I have included my recommendation that this information be included with the Technical Specification information included with each model currently available so that potential customers of their products are fully aware of this fact and make an informed purchase decision.
*** NOTE: These transmitters, CZE-T251, CZH-25A and FMUser Model FU-25A utilize the exact same circuit board. The only difference between them is their enclosures. Same exact transmitters, different appearance is the ONLY difference !
User Manual: download.fmuser.org/Fmuser.org-FU-25A-CZE-T251-CZH-T251-user-manual.pdf
"Knowledge Is Always Made More Valuable By Sharing It With Others !" Always Remember To Be Kind ! True Greatness Often Has Very Humble Beginnings ! Help A Kid Out Today ! *** High Mountain Radio *** "Broadcasting From Somewhere High In The Remote Appalachian Mountains"
