Re: [Repeater-Builder] Re: Failure to communicate.....
On Friday 17 February 2006 02:22 pm, hwingate wrote: > Perhaps we need a special license class for the 'really advanced' > amateurs. Click here: (author unknown) Well we have this now, it's called a GROL/w radar. It's a 150 question test out of a pool of like 1450 or so. Some times you just need to pull rank when some one is stupid in public. Works well, I've only done it once though. -- Bryan Fields, KB9MCI 15:04:36 up 4 days, 14:28, 3 users, load average: 1.06, 1.18, 1.13 I owe the public nothing. -- J.P. Morgan 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/
Re: 6 meter pairs (was RE: [Repeater-Builder] UHF Power)
On Monday 13 February 2006 12:34 pm, Mike Perryman wrote: > I really wanted a 500kHz split so that I could use the heliax-duplexer > approach.. Well you can build the heliax duplexer for any split you want. Jeff's newer design using a hybrid ring is truly cool, but alas I dont have VNA (yet) so it's kinda hard to replicate this design at home. I also belive Jeff will build them for a fee too, might be worth it. -- Bryan Fields, KB9MCI 12:43:56 up 12:07, 1 user, load average: 0.62, 0.39, 0.30 inbox, n.: A catch basin for everything you don't want to deal with, but are afraid to throw away. 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/
Re: [Repeater-Builder] Best Controllers
On Friday 10 February 2006 02:41 pm, J Hughes wrote: > What are the best controllers out there ?? That will support 4 ports or > more. Able to down-load the information and up-load new programs. Due > audio processing. Support multiple PL tones and DCS. Top of the line > Price is not a factor. Whats out there ?? Thanks K9JAC How about a repeater system using asterisk and one of the radio cards, you can scale it up to 8 or more ports easily. http://www.zapatatelephony.org/app_rpt.html The card is $500 and you need a halfway decient box to put it in. unlike the other repeater linking software out there, app_rpt is Free Software. I want to set this up as soon as I get some free time here. -- Bryan Fields, KB9MCI 18:15:56 up 21:58, 2 users, load average: 0.87, 0.42, 0.24 Non-Reciprocal Laws of Expectations: Negative expectations yield negative results. Positive expectations yield negative results. 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/
[Repeater-Builder] mods.dk (possiably OT)
Anyone notice that mods.dk is now a closed site that is charging to view anymore then 1 page per day? I have a number of mods I have written, and that appear on mods.dk. I have always given my mods away under a license that lets anyone post them and change them so long as they are used for non commercial use, and not have any fees charged for them. I believe they are using a good of deal of repeater builder related material as well. This is definitely against my wishes and I have been trying to find an email address to email an admin there to take my content down, either that or pay me. This is wrong to take content from around the net and charge for it with out obtaining permission from the content producers. -- Bryan Fields, KB9MCI 15:43:38 up 32 min, 2 users, load average: 1.50, 0.82, 0.65 There you go man, Keep as cool as you can. It riles them to believe that you perceive the web they weave. Keep on being free! 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/
Re: [Repeater-Builder] Re: Hamtronics PLL exciter
On Monday 30 January 2006 04:21 pm, skipp025 wrote: > Also note the original transistor had more output, > so one would have to also take that into consideration No, it would drop off to just under a watt after 10 min. The replacement does 2.3 watts after 1 one hour, so it's got more output as far as I see. -- Bryan Fields, KB9MCI 17:38:52 up 44 min, 2 users, load average: 0.36, 0.43, 0.36 When you live in a sick society, just about everything you do is wrong. 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/
[Repeater-Builder] Hamtronics PLL exciter
As we have had many issues with our 220 PLL exciter with microphonics and other noise, most of this was traced down to the final amp stage. This stage uses a Phillips to-38 style transistor which has the collector commen to the case, and Hamtronics puts a big heatsink on the case! Needless to say this creates a bunch of noise on the final signal due to RF being on the heatsink. We have been able to get about 3.0W out of it starting out ice cold, but after it heats up, it goes as low as 900mW. I replaced it with a NTE341 (MRF237 equiv), which has the emitter commen to the case and is designed to have the case soldered to the ground plane of the board for heatsinking. To make it fit it needs to be mounted "backwards" so i had to drill a hole for the base pin to go through an remove the green solder mask on the ground plane. I did not do any math on the circuits so my matching is probably not optimal, the only thing done was to change out the input and out put matching cap's with variable units that we had on hand. After this was done, I was able to get 2.30W out (@13.8V)of the exciter with no drop off due to heat, and 95% of all microphonics were eliminated! The output was checked after 1 hour and it was still at 2.28 watts output, so it looks like it was a success. I would think we could get more output if the matching networks were redone, but I did not feel like screwing with the coils for the backup repeater. I may do that in the future, and also try the real Motorola mrf237 in the circuit and see how it compairs to the NTE part. -- Bryan Fields, KB9MCI 22:58:17 up 15 min, 1 user, load average: 1.31, 0.93, 0.73 You will be surprised by a loud noise. 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/
Re: [Repeater-Builder] STATION MASTER WHERE TO BUY
On Monday 23 January 2006 08:12 am, bobby3c wrote: > WHERE IS THE BEST OR WHO KNOWS WHERE TO PURCHASE ONE ?? THANKS BOB No need to shout. Tessco carries them IIRC. http://www.tessco.com -- Bryan Fields, KB9MCI 12:46:11 up 11:15, 1 user, load average: 0.65, 0.42, 0.45 Forgive and forget. -- Cervantes 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/
Re: [Repeater-Builder] Re: Hamtronics T301 220 exciter Final and microphonics
On Monday 19 December 2005 11:48 pm, Ken Arck wrote: > Don't forget that in both PM and FM schemes, the modulation is done early > on and multiplied. So for a typical multiplication scheme of x 9, the > modulation introduced only needs to be 550 Hz or so (for a 5 Khz spec). And > even a paultry 550 Hz requires a fair amount of audio voltage to > accomplish. In most PLL units I have worked with in the "ham" market the vco is modulated directly on the loop op amp. There in no multiplication the VCO runs at the output frequency. As to the origional question, anyone fixed the microphonics problems with the exciter? -- Bryan Fields, KB9MCI 01:07:04 up 3 days, 14 min, 2 users, load average: 0.31, 0.23, 0.26 Somewhere in DOWNTOWN BURBANK a prostitute is OVERCOOKING a LAMB CHOP!! 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/
Re: [Repeater-Builder] Hamtronics T301 220 exciter Final and microphonics
On Monday 19 December 2005 09:55 pm, Kevin Custer wrote: > Yes it can... FM that is... Well the distortion I am seeing due to the final looks like AM, but then the vco has FM distortion when you tap the board so it's hard to tell. It's a combo of both. How can the Final in this produce FM of it's own, I would think cuz it's a variable cap on the output it would be AM? But still wondering if anyone has changed the transistor out and seen any better results with it. -- Bryan Fields, KB9MCI 22:17:14 up 2 days, 21:24, 2 users, load average: 1.29, 1.16, 1.27 The steady state of disks is full. -- Ken Thompson 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/
Re: [Repeater-Builder] Hamtronics T301 220 exciter Final and microphonics
On Monday 19 December 2005 05:44 pm, Ken Arck wrote: > <---Modulates it AM wise? Cause there ain't no way it could modulate the > signal FM wise.. Yes AM wise, it varys the output Z which would make a AM signal. We see it on the service monitor when we tap/blow on it. -- Bryan Fields, KB9MCI 18:58:36 up 2 days, 18:05, 2 users, load average: 0.92, 0.91, 0.83 I wonder if I could ever get started in the credit world? 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/
[Repeater-Builder] Hamtronics T301 220 exciter Final and microphonics
well I have a T301 on 220 that has some serious power drop off and microphonics issues. I had thought the microphonics were generated in the VCO, and while some of them are, i have traced most down to the final amp. It looks like just a bad amp design as the transistor has the collector commen to the case, putting RF on the Heatsink. the heat sink seams to form a capacitor between it and the shield so any movement or heating modulates the signal. We also have seen the output power go from 4 watts down to 1.2 watts as it heats up. If we put a fan in there the output is stable at about 2 watts, but it modulates the signal with a hum from the moving air. So I was thinking to replace the output transistor with a MRF237 which has the case tied to ground(emitter) which would seam to be a better idea. For the time being we removed the final and are using a small brick amp that puts out 3 watts stable, with no microphonics. So anyone tried this or have a better fix for the issue? -- Bryan Fields, KB9MCI 15:28:02 up 2 days, 14:35, 2 users, load average: 0.85, 0.61, 0.52 Health is merely the slowest possible rate at which one can die. 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/
