Gee, John The attached email sounds like he doesn't trust you. 73 AC0Y
--- In [email protected], JOHN MACKEY <[EMAIL PROTECTED]> wrote: > Hi Michael- > > Last time you & I talked (about 3 months ago) you said you were running > amateur grade gear on your IRLP node at the KOIN-TV tower. Apparently you > recently changed to commercial grade gear, which is a good thing! Also, the > last time you & I talked you REFUSED the suggestion of using cavity filters on > your transmittes because it would prevent you from being frequency agile. > Apparently you decided to change this also? > Those are good moves, Michael. Those actions will go a long way to resolving > the interference problems that have been associated with your IRLP node. > Perhaps, that is all that was needed! > > But I really think you should re-check your deviation reports. The repeaters > in this area are not running 6 KHz deviation. Good amateur practice for > practically all voice repeaters is about 4.5 KHz deviation or no more than 5 > Khz MAX. Your suggestion of 6 KHz deviation is roughly 20-25% over. On the > other hand, that is far better than the 9 KHz deviation for your system (as > checked by "Dalcomm") as you stated in your previous e-mail to me a few months > ago. I have attached that e-mail immediately below. > > ------ Original Message ------ > >Received: 03 September 2004 > >From: "mbloom0947" <[EMAIL PROTECTED]> > >Dear John, Thank you for your response. Actually, we did use a radio > >communications company called Dalcomm Communications, who are very > >experienced in this sort of thing and quite well equipped. I checked >back > with them and learned that the PEAK deviation (not the average) was >9 KHz. Of > course the average deviation would depend upon an integration >of the signal > over time and would be dependent upon the nature of the >source audio. I do > appreciate your offer to do the measurements and >acknowledge that you have > made this kind offer in the past. The reason >I chose to use Dalcomm was that > I wanted the measurements to be made by >an independent company with no > preconceived notions whose only interest >is to provide accurate result. > Sincerely Michael Bloom W7RAT > > > ------ Original Message ------ > Received: Tue, 21 Dec 2004 04:55:31 PM CST > From: "mbloom0947" <[EMAIL PROTECTED]> > > Since I am the "guy running the IRLP node" you refer to, I thought I > > might take a moment to reply. > > > > The equipment now consists solely of Motorola GM300's, not amateur > > grade equipment. For the last six months or more both the 2m and > > 440 transmitters have had large cavity filters in place. I believe > > you may still be thinking of the original experimental equipment used > > for proof of concept. The 2m cavity is a Sinclair 10" diameter > > unit. As for the deviation I have measured it with a Motorola Model > > 2600 service monitor at 6 KHz, about the same as other repeaters in > > this area. The node can be heard 100 miles away in some directions > > by mobiles and those same mobiles running 75 watts, about the same as > > the node transmitter output, can be heard as well. As for the > > frequency, I'm running a SIMPLEX node on a SIMPLEX frequency. > > > > I just thought I'd bring you up to date and suggest that you check > > your facts next time. > > > > Sincerely, > > Michael Bloom W7RAT Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
