RE: [Repeater-Builder] Master II station 66 split conversion to 56 split
Well, that's good news. Maybe that's why I could find no references to the replacement procedure. I suppose that NHRC is being cautious in case mileage varies. 73 de Morris KI4IUA -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Jim Brown Sent: Sunday, March 22, 2009 6:04 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Master II station 66 split conversion to 56 split I have retuned 10+ GE Mastr II exciters - base/moble and have never had to change a component. Put the ICOM in for the new frequency and tune per the manual. I use a Bird milliWatt meter that has a 250 mW full scale and an internal 50 Ohm load to finish the tuning, after going through the test points with a Simpson 260. Peaking the previous stage and dipping for the input to the next stage as per the tuning instructions will give you a working exciter as long as there is no component issue in the exciter. 73 - Jim W5ZIT --- On Sun, 3/22/09, Morris Dillingham mdi...@nnwifi.com wrote: From: Morris Dillingham mdi...@nnwifi.com Subject: [Repeater-Builder] Master II station 66 split conversion to 56 split To: Repeater-Builder@yahoogroups.com Date: Sunday, March 22, 2009, 2:20 PM Now that you have helped me close out the old Spectrum issues, can anyone point me to the list of caps and their new values to convert the exciter board of a Master II station? On the NHRC site I see mention of the need to change out a dozen or so caps but no other references. 73 de Morris KI4IUA
RE: [Repeater-Builder] Master II station 66 split conversion to 56 split
Since we are retuning to 147.330 transmit and 147.930 receive, we are at the end of the band that should help. Thanks to all for the reassurance. 73 de Morris KI4IUA -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:Repeater- buil...@yahoogroups.com] On Behalf Of n...@no6b.com Sent: Sunday, March 22, 2009 6:36 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Master II station 66 split conversion to 56 split At 3/22/2009 15:03, you wrote: I have retuned 10+ GE Mastr II exciters - base/moble and have never had to change a component. Put the ICOM in for the new frequency and tune per the manual. Same experience here, except that if you want to put one on the 144.390 APRS frequency you may find that some exciters don't quite make it down that far. Bob NO6B Yahoo! Groups Links
[Repeater-Builder] Master II station 66 split conversion to 56 split
Now that you have helped me close out the old Spectrum issues, can anyone point me to the list of caps and their new values to convert the exciter board of a Master II station? On the NHRC site I see mention of the need to change out a dozen or so caps but no other references. 73 de Morris KI4IUA attachment: winmail.dat
Re: [Repeater-Builder] Master II station 66 split conversion to 56 split
I have retuned 10+ GE Mastr II exciters - base/moble and have never had to change a component. Put the ICOM in for the new frequency and tune per the manual. I use a Bird milliWatt meter that has a 250 mW full scale and an internal 50 Ohm load to finish the tuning, after going through the test points with a Simpson 260. Peaking the previous stage and dipping for the input to the next stage as per the tuning instructions will give you a working exciter as long as there is no component issue in the exciter. 73 - Jim W5ZIT --- On Sun, 3/22/09, Morris Dillingham mdi...@nnwifi.com wrote: From: Morris Dillingham mdi...@nnwifi.com Subject: [Repeater-Builder] Master II station 66 split conversion to 56 split To: Repeater-Builder@yahoogroups.com Date: Sunday, March 22, 2009, 2:20 PM Now that you have helped me close out the old Spectrum issues, can anyone point me to the list of caps and their new values to convert the exciter board of a Master II station? On the NHRC site I see mention of the need to change out a dozen or so caps but no other references. 73 de Morris KI4IUA
Re: [Repeater-Builder] Master II station 66 split conversion to 56 split
At 3/22/2009 15:03, you wrote: I have retuned 10+ GE Mastr II exciters - base/moble and have never had to change a component. Put the ICOM in for the new frequency and tune per the manual. Same experience here, except that if you want to put one on the 144.390 APRS frequency you may find that some exciters don't quite make it down that far. Bob NO6B
Re: [Repeater-Builder] Master II station 66 split conversion to 56 split
On Sun, 22 Mar 2009 n...@no6b.com wrote: I have retuned 10+ GE Mastr II exciters - base/moble and have never had to change a component. Put the ICOM in for the new frequency and tune per the manual. Same experience here, except that if you want to put one on the 144.390 APRS frequency you may find that some exciters don't quite make it down that far. What sort of temperature coeffiecent does the exciter have? If I want to find the limits of lock, do I need to freeze it or heat it up to 140 degrees? -- Kris Kirby, KE4AHR Disinformation Analyst
Re: [Repeater-Builder] Master II station 66 split conversion to 56 split
On Mar 22, 2009, at 4:40 PM, Kris Kirby wrote: On Sun, 22 Mar 2009 n...@no6b.com wrote: I have retuned 10+ GE Mastr II exciters - base/moble and have never had to change a component. Put the ICOM in for the new frequency and tune per the manual. Same experience here, except that if you want to put one on the 144.390 APRS frequency you may find that some exciters don't quite make it down that far. What sort of temperature coeffiecent does the exciter have? If I want to find the limits of lock, do I need to freeze it or heat it up to 140 degrees? I'll say this: Many people put their repeaters in temperature controlled environments and then hunt needlessly for 2C ICOM's. There's a chart in the LBIs for where/when the temperature compensation kicks in. More folks should read it. (GRIN!) -- Nate Duehr, WY0X n...@natetech.com
Re: [Repeater-Builder] Master II station 66 split conversion to 56 split
Hey - I thought we were talking about the standard osc/multiplier exciters for VHF. The only thing I have ever had to do to move a PLL exciter down into the ham band is replace the aluminum slug in the PLL coil with a ferrite slug. My installs are non temperature controlled and the temps range from -10 to about 100 deg F. No problems with maintaining a lock over that range, but the exciter was optimized at room temp for the correct lock voltage on only one frequency. The applications have all been repeaters with no frequency switching. I understand that some component values are changed for a factory change in frequency from commercial frequencies down into the ham band, but I have not had to make any changes other than the slug change when converting a 66 range PLL exciter. 73 - Jim W5ZIT --- On Sun, 3/22/09, Kris Kirby k...@catonic.us wrote: From: Kris Kirby k...@catonic.us Subject: Re: [Repeater-Builder] Master II station 66 split conversion to 56 split To: Repeater-Builder@yahoogroups.com Date: Sunday, March 22, 2009, 5:40 PM On Sun, 22 Mar 2009 n...@no6b.com wrote: I have retuned 10+ GE Mastr II exciters - base/moble and have never had to change a component. Put the ICOM in for the new frequency and tune per the manual. Same experience here, except that if you want to put one on the 144.390 APRS frequency you may find that some exciters don't quite make it down that far. What sort of temperature coeffiecent does the exciter have? If I want to find the limits of lock, do I need to freeze it or heat it up to 140 degrees? -- Kris Kirby, KE4AHR Disinformation Analyst
