Dr. Richie, I am confident that your problem will be solved if you upgrade to 250watts. Go for it! I look forward to hear the audio file. It will give an idea of type of noise.
BEL, Bangalore manufactures 200-250watt FM transmitters, you may want to get in touch with them. regards, mahesh vu3mbv On Thu, Sep 3, 2009 at 5:45 PM, Dr Richie Rego SJ <[email protected]>wrote: > Thank you Mahesh for that enlightening information. > We use 50 watt Nomad transmitter, which is permitted by the Ministry in > normal circumstance. We have placed our antenna at a 30 mt height from > ground level; in addition, we have a good altitude. Ours is a dipole > antenna. As far as I understand, the output is good - but for the noise and > reception problem. > > You are right, three FMs with AIR have preceded us. The interference is > experienced in many sets (if not uniformly and universally). We have just > completed technical audit. > > I could not upload the audio for the CRS community to get an idea of > distortion. > > Good wishes. > > ==================================== > Rev Dr Richard Rego SJ > Director, SARANG SAC 107.8FM Community Radio > Head & Asst Prof., MCMS > Dept of Mass Communication > St Aloysius College; P.B. 720 > Mangalore - 575003. > www.richardrego.wordpress.com > www.staloysiuscollege.wordpress.com > 0824-2449706. > +919448546425. > > ------------------------------ > *From:* mahesh acharya <[email protected]> > *To:* Dr Richie Rego SJ <[email protected]> > *Cc:* CR Forum <[email protected]> > *Sent:* Thursday, 3 September, 2009 14:17:14 > *Subject:* Re: [cr-india] on frequency > > Dear Dr. Richie, > > What is the transmitter output? and where is the transmitter located? CR > policy allows to use max 250watt transmitter. > > However this will not assure that everybody will be able to hear the > broadcast (the receiver should be in broadcast zone) but will improve the > situation a bit. > > The other option is to put repeater(s) where the signal reception is poor. > You will have to seek permission from Wireless Planning Commsn to do this by > building a strong case. (audio recording etc) > > *Some antenna basics > * > Omnidirectional Antenna's radiate power uniformally in all directions. > Other types of transmissions are unidirectional radiating more power in one > direction (usually the direction of antenna that is pointed). In terms of > range difference omni directional will have small range of reception. Uni's > range of rcption will b more. > > Music systems in cars cannot recve the broadcast for the fact that they do > not have telescopic antenna (the ones u have on stand alone radio sets) and > since output of sarang may is in watts compared to kilowatts (kilo=1000) > mobile phones will not rcve the broadcast at all unless they are very very > close to transmitter. > > Solution: Listeners will have to use telescopic antenna for the radio in > music system. Using headphones in mobile may improve the situation a bit as > headphones act as antenna. > > Radio sets that are not able to recve good quality audio can be improved if > they point the telescopic antenna in the direction of the transmitter. > Keeping the set near window will also help in some cases. > > Regarding FM and AIR invading the freq, this may not be possible in all the > radio sets. Some poor quality radio sets will recve strongest signals even > though you have tuned to freq that you want to listen. > > There is some degree of separation between freq's assigned by WPC and thus > some sets rcvng only FM and AIR may be true but not all. FM and AIR were > were already present b4 sarang was assigned the freq. > I could be wrong and in case all the radio sets are rcvng FM and AIR, then > the matter should be taken up with WPC and I am sure they will look into it. > > > Hope this helps. > > regards, > mahesh > vu3mbv > > * > > * > On Wed, Sep 2, 2009 at 10:57 PM, Dr Richie Rego SJ <[email protected]>wrote: > >> >> Hi everyone! >> >> I have a problem. Would like to know how you would deal with this - we >> have 107.8 MHz frequency assigned to us. But low power radio sets and >> mobiles cannot receive our radio signals even in nearby areas - car stereo >> do. That means, local communities are deprived of our transmission. People >> keep pleading us "increase signals" - they have listened to our station >> sometime; they have read in newspapers. hence their demand. We are unable >> because of the frequency. We checked why this happens. The answer is >> 'frequency'. In addition - noise! >> >> Besides, private FMs and AIR keep invading our frequency gloriously. All >> Our efforts and people's desire doesn't seem to be bearing fruit. >> >> How would be address this problem? >> I will try uploading an audio piece recorded from our own transmitter in >> our own campus & in the vicinity of the College. You can feel the noise and >> difference. >> >> If I succeed, the piece should be available through my blog >> www.richardrego.wordpress.com for you to get a taste. >> TC >> >> ==================================== >> Rev Dr Richard Rego SJ >> Director, SARANG SAC 107.8FM Community Radio >> Head & Asst Prof., MCMS >> Dept of Mass Communication >> St Aloysius College; P.B. 720 >> Mangalore - 575003. >> www.richardrego.wordpress.com >> www.staloysiuscollege.wordpress.com >> 0824-2449706. >> +919448546425. >> >> >> >> >> _______________________________________________ >> cr-india mailing list >> [email protected] >> https://mail.sarai.net/mailman/listinfo/cr-india >> > > >
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