2-700M 3W HF FM VHF UHF FM Ενισχυτής ισχύος RF ευρυζωνικός για κυματοθαλάσσιο ενισχυτή
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Buy 2 samples until arrived after connected output antenna and supply it at 12Vdc draw more then 0,3Amp and start burned !!!!! on IC2. Second sample tested again at 12 Vdc , Not burned but hot too and power RF amplierf doesn't more than 10dB. For me very poor device maybe weren't 2 lucky pieces....
Goods received in perfect condition through postal services in about 4-5 weeks time, which is absolutely normal. The goods were checked in the RF workshop, and turned out to be capable of 1 Watt Maximum output by feeding 0dBm (1 milliwatt input), confirming the reliable almost uniform gain within the specified band (1-700MHz) of 30dB with linearity. We could not test it at higher power levels due to limitation of our Rf signal generator, whose output power level is limited to 0dBm (1 mW) max. Further investigation revealed that the module uses the following components with suggested power levels recommended by the manufacturer for reliable operation. RD01MUS1 (SMD CODE - K2) as the final stage rated for 520MHz, 1Watt SBA-5089Z-Sirenza. (SMD CODE - BA5Z) as the first driver stage. It may be possible to use this module at higher power levels, However we ourselves use the devices safely to half of their capacity for long term reliability for continuous operation. I am very happy to use them between 0.5 ~ 1.0 watts for our applications.... Very satisfied with the results, this will find use in various applications.
Before connecting, use silicone grease under the transistors. The maximum voltage is 12 V. The transistors operate in class A. At 12 V, the current is 0.45 A. 1.25 W output power, 27 dB power gain at f = 400 MHz.It will be good as a class B symmetric output stage driver. Delivery time was 60 days.
Καλή τιμή... αλλά μπορεί να τροποποιηθεί ώστε να λειτουργεί καλύτερα μειώνοντας το ρεύμα μεροληψίας στο στάδιο εξόδου. Η αντίσταση R6 πρέπει να μειωθεί. Μπορεί να χρησιμοποιήσει ένα μικρό τρίποντο (10k) για να γίνει ρυθμιζόμενο.
Πολύ καλά
Nice & functional. Some frequency output is 2F.
Μικροσκοπικό αλλά καλό!
Λειτουργεί καλά με τάση παροχής που δεν υπερβαίνει τα 10 βολτ 100μα. Χτισμένο σε μεταλλικό περίβλημα, με άνοιγμα μέσω του οποίου διασταυρώνονται τα πτερύγια ψύξης.
Powered up on 15.03 VDC as specified and transmitted. It fried in 10 seconds. I suggest using only 12.0 VDC NO MORE. Awaiting new order.
Haven't yet tried it...but all other things I ordered all worked fine. So no fear that this one won't work. And great quality for such a price. I use it for all kind of experiments.