Search found 10 matches

by rickv152
Fri Oct 24, 2008 2:33 pm
Forum: FM transmitters
Topic: MAX PRO 3 exciter help
Replies: 6
Views: 15982

Circular polarized antennas

thank you for your lengthy reply.

to answer your question, I will start with what I said at the 1st: ".....(circular polarized) mounted on top of a mountain (antenna is Jampro single bay gives 46% out)."

the 46% efficiency comes from that type of antenna.
Based on a simple dipole antenna, a ...
by rickv152
Wed Oct 08, 2008 5:57 pm
Forum: FM transmitters
Topic: MAX PRO 3 exciter help
Replies: 6
Views: 15982

ok, I appreciate the offer of a rebate.

I'll let you know.
by rickv152
Wed Oct 08, 2008 3:20 pm
Forum: FM transmitters
Topic: MAX PRO 3 exciter help
Replies: 6
Views: 15982

yep, sounds like what you are saying is the case.

I wondered about the 150 watter Amp.

I've had to mess with it a bit to get it up in power and keep from overheating and generating spurious signals every 3.6 MHz all the way up and down the band; has no LPF in it either; finally got that solved ...
by rickv152
Wed Oct 08, 2008 12:20 am
Forum: FM transmitters
Topic: MAX PRO 3 exciter help
Replies: 6
Views: 15982

MAX PRO 3 exciter help

We have this unit installed in a case (cybermax FM 150W) driving a 150 watt linear amp: broadcast warehouse.
we are going to use this transmtter arrangement to run a full power FM (licensed in USA) and need close to 65 watts ERP from the antenna (circular polarized) mounted on top of a mountain ...
by rickv152
Tue Oct 07, 2008 11:30 pm
Forum: FM transmitters
Topic: My "pirate" station
Replies: 12
Views: 28276

Hi Bob,

here's the problem; take it from a seasoned pirate (eons ago as a teen) who went "legal".

Some ideas:
FM pros: if you live out in the tulies, then 15 watts will do nicely with a good antenna; get a Radio Shack 5 element FM antenna and it'll boast your power in the direction you aim it ...
by rickv152
Tue Oct 07, 2008 11:08 pm
Forum: FM transmitters
Topic: Loosing distance
Replies: 3
Views: 11077

Re: Loosing distance

your problem could be a # of things.
you need some sort of reference other than "you heard it so far away"; obviously something has changed, but like the other comment says, you need to check things starting with the output forward power vs reflected power. So many things could have changed:
1) your ...
by rickv152
Thu May 04, 2006 3:35 pm
Forum: FM transmitters
Topic: Stereo/Mono question Max Pro III Can someone help pleeeese?
Replies: 7
Views: 21622

I'm sorry; I was not even aware that this post was still here. let alone this BBS was back up and running consistently. I wish to say "THANK YOU" for everyone's helpful information.
As far as Pre-Emphasis (PE) and Stereo is concerned I am quite aware with how they work; used to teach their theory at ...
by rickv152
Tue Jul 05, 2005 4:44 am
Forum: FM transmitters
Topic: Stereo/Mono question Max Pro III Can someone help pleeeese?
Replies: 7
Views: 21622

It worked!!

setting pre-emphasis "off" from panel worked; now it's stereo with no pre-emphasis; so how to make it stereo and have 75 uS pre emphasis is my next question. regards,
by rickv152
Mon Jul 04, 2005 10:19 pm
Forum: FM transmitters
Topic: Stereo/Mono question Max Pro III Can someone help pleeeese?
Replies: 7
Views: 21622

on the Max pro:
1) physical jumper for pre-emphasis is not connected;
2) via display, pre-emphasis may have been set to 75 uS. Is this what you mean to disable? thanks in advance.
Ricardo
by rickv152
Mon Jul 04, 2005 9:42 pm
Forum: FM transmitters
Topic: Stereo/Mono question Max Pro III Can someone help pleeeese?
Replies: 7
Views: 21622

Stereo/Mono question Max Pro III Can someone help pleeeese?

we recently acquired this transmitter w/SE4 DSP stereo generator (coder). at first there was no 19khz pilot detectable on any radio; we had to set audio inputlevel input on Max Pro to max to get stereo indication on receivers. However no audio is still being sent in stereo. For testing, we can sent ...