Re: [Repeater-Builder] TKR 750/850 single antenna
Thankyou for that Marcus On Sun, Aug 29, 2010 at 12:50 PM, Paul Lambert stra...@sbcglobal.netwrote: See page 9 of the service manual or page 10 of the pdf document. I have done this for a TKR-750 and it worked great.
Re: [Repeater-Builder] TKR 750/850 single antenna
small problem i have found, 1, i don't have a manual, no problem you have given me a pdf version 2, problem is you have given me a TKR-750 thats a repeater, i only have a Mobile unit TK705 or TK805 same ship different smoke stack Marcus On Sun, Aug 29, 2010 at 12:50 PM, Paul Lambert stra...@sbcglobal.netwrote: See page 9 of the service manual or page 10 of the pdf document. I have done this for a TKR-750 and it worked great.
Re: [Repeater-Builder] TKR-750 Crunchy/Grungy Weak Signal Audio
Probably the LMR-400 cable is the cause. Well documented and discussed here regularly. Are the other repeaters with the same problem also using the same type cable? Chuck WB2EDV - Original Message - From: Bob - AF6D b...@af6d.com To: Repeater-Builder@yahoogroups.com Sent: Monday, August 09, 2010 4:46 AM Subject: [Repeater-Builder] TKR-750 Crunchy/Grungy Weak Signal Audio My 2 meter TKR has worked fine for about a year but has always had a problem on our frequent weak signals. We're a mountain community and CERT/RACES/ARES/Skywarn users are often on HT's. There are a couple of towers in the neighborhood at 6,400 feet over southern California (it's kewl living at a repeater site) and on my own gear I don't hear anything on a weak signal beyond the norm. But on the TKR it just sounds dirty. Grungy. Crunchy. There are commercial sites within one mile with high power paging but we've detected no intermod. We did have a bout were grungy audio was breaking PL and hanging until timeout. But that went away. The Wacom 6 cavity WP-642 is tuned dead on and offers excellent isolation and rejection (at a cost of 2-3dB loss on TX sigh). Another TKR user at a high elevation commercial site reports similar experiences. Yet another TKR owner reported that his is excellent and yes the audio is good. Just not for us on weak signals. He suggested perhaps an RFI issue but from where? Our installation is modest and constrained only by my lack of time and funds. My daughter is sick and I live in a hospital with her, so be gentle HI HI. The very large guard dog watches the house. The antenna is a Hustler G5-144 tuned with a MFJ 259, dead on and above the repeater through an insulated roof by about 30 feet. We have no desense. It is fed with LMR-400 just because I haven't put hard line on it. No preamps are installed. At 6,400 feet not much is needed. The receiver is .18uV. The TKR hears very well compared to my FT-847 with an antenna 20 feet lower. Why the grungy audio? Yahoo! Groups Links No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.851 / Virus Database: 271.1.1/3059 - Release Date: 08/08/10 13:57:00
RE: [Repeater-Builder] TKR-750
Norm, I am not getting any error message at this time and I am about 90 % sure it is a version 1 as you said. Also Mike has asked me to call him for some information and I will do that. I think I told everyone earlier that I did get the KPG66D to work as long as I didn’t put the repeater in PROG mode. My frequencies are still set so it is just a matter or tuning the VCO now. Duplexers are tuned and antenna and coax are ready to go. I am going to finish the alignment process regardless of the voltage and then make a second round of checking to see if I can peak it more. Randy From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of NORM KNAPP Sent: Friday, April 10, 2009 9:32 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] TKR-750 If the repeater pll was unlocked, you probably get E1 or E3 on the display along with a continous beeep. I have firmware that will work with your repeater. It basically changes the courtesy tone so that it sounds with COR drop and not hang time drop. If you are using KPG-66D, the I am pretty sure you have a version 1. - Original Message - From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Sent: Fri Apr 10 18:06:00 2009 Subject: RE: [Repeater-Builder] TKR-750 I do not know for sure what version it is but it must be Version 1 as I can’t find anything saying version 2. I use KPG 66d for the software. I think the later version uses kpg 91 for something like that. If I just turn the repeater on and not hold the pf-1 key then I get the screen for channel entry. I would like to know if there is a firmware upgrade and how it is done. It surely can’t be done through 66d as it says there is a connection error. I am thinking maybe since the frequency is so low that I may have to bring other things inline before I can get 8 volts. Tell me one thing……..is there an led somewhere that tells me if it is locked on frequency or unlocked? Randy From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com ] On Behalf Of NORM KNAPP Sent: Tuesday, April 07, 2009 9:50 PM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: Re: [Repeater-Builder] TKR-750 Sounds like you have a K-1 alright. Firmware is kinda like BIOS. Holding dowd PF-1 while powering up puts it into FIRMWARE program mode. The number of decimals or periods showing on the display tell you what baud rate to program the firmware in at. Now, do you have a version 1 or 2 radio? What KPG software are you using? I must say I am a bit surprised you cannot get the VCO voltage to 8 volts, but 5 should be ok anyway. - Original Message - From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Sent: Tue Apr 07 19:42:31 2009 Subject: RE: [Repeater-Builder] TKR-750 It only says K-1. Goes from 146.000 to 174.000 or something near that. I am confused at what the manual calls firmware. Is that like bios in a computer or does it also take in programming the channels. Also the manual talks about holding PF1 while turning on the repeater to put it in programming mode. If I do that, then I can’t get the software to work. If I just turn on the computer without holding anything, then the software will work. Then there is also reference to K,E. Is E just another model? Anyway, what do I need to do to get the test points up to 8 volts? About 5 is the highest I can get. The repeater was originally on a frequency in the high 150’s. Randy From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com ] On Behalf Of NORM KNAPP Sent: Tuesday, April 07, 2009 3:59 PM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: Re: [Repeater-Builder] TKR-750 Are you tuning the TX or the RX VCO? The K and the K2 overlap coverage from 146 to 150mhz. From what I understand the RX pre
RE: [Repeater-Builder] TKR-750
Thanks Jeff! I actually have a factory copy of the service manual that came with the repeater. Randy From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Yahoo Sent: Saturday, April 11, 2009 2:29 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] TKR-750 The service manual is in the Kenwood section of the sight. Jeff _ From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Randy Brumback Sent: Friday, April 10, 2009 4:06 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] TKR-750 I do not know for sure what version it is but it must be Version 1 as I can't find anything saying version 2. I use KPG 66d for the software. I think the later version uses kpg 91 for something like that. If I just turn the repeater on and not hold the pf-1 key then I get the screen for channel entry. I would like to know if there is a firmware upgrade and how it is done. It surely can't be done through 66d as it says there is a connection error. I am thinking maybe since the frequency is so low that I may have to bring other things inline before I can get 8 volts. Tell me one thingis there an led somewhere that tells me if it is locked on frequency or unlocked? Randy From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of NORM KNAPP Sent: Tuesday, April 07, 2009 9:50 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] TKR-750 Sounds like you have a K-1 alright. Firmware is kinda like BIOS. Holding dowd PF-1 while powering up puts it into FIRMWARE program mode. The number of decimals or periods showing on the display tell you what baud rate to program the firmware in at. Now, do you have a version 1 or 2 radio? What KPG software are you using? I must say I am a bit surprised you cannot get the VCO voltage to 8 volts, but 5 should be ok anyway. - Original Message - From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Sent: Tue Apr 07 19:42:31 2009 Subject: RE: [Repeater-Builder] TKR-750 It only says K-1. Goes from 146.000 to 174.000 or something near that. I am confused at what the manual calls firmware. Is that like bios in a computer or does it also take in programming the channels. Also the manual talks about holding PF1 while turning on the repeater to put it in programming mode. If I do that, then I can't get the software to work. If I just turn on the computer without holding anything, then the software will work. Then there is also reference to K,E. Is E just another model? Anyway, what do I need to do to get the test points up to 8 volts? About 5 is the highest I can get. The repeater was originally on a frequency in the high 150's. Randy From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com ] On Behalf Of NORM KNAPP Sent: Tuesday, April 07, 2009 3:59 PM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: Re: [Repeater-Builder] TKR-750 Are you tuning the TX or the RX VCO? The K and the K2 overlap coverage from 146 to 150mhz. From what I understand the RX pre-select really determines freq coverage on those models. - Original Message - From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Sent: Tue Apr 07 12:57:47 2009 Subject: Re: [Repeater-Builder] TKR-750 At 10:18 AM 4/7/2009, Randy Brumback wrote: I need to tune the VCO for my amateur frequency in the TKR-750. Does this unit need to be hooked to the computer and set in some way before tuning? I am at the very low end of what the repeater will program to at 147.060 and I can't get the right voltage on the Test Point by tuning the capacitor. The voltage is well below what it should be. ---Must not be a K2 version. Is it a K? But no, it does not need to be connected to a PC in order to align it Ken -- President and CTO - Arcom Communications Makers of repeater controllers and accessories. http://www.arcomcontrollers.com/ http://www.arcomcontrollers.com/ http://www.arcomcontrollers.com/ http
Re: [Repeater-Builder] TKR-750
Ok, if you are not getting an error messsage, then the repeater should be in lock. You only put the repeater in program mode when changing firmware. Just do the best you can with the voltages on the VCO. Maybe you should call Kenwood Tech support. Did you say that your repeater was a 146-174mhz split? I do not know what the differences between a version 1 and 2 are but I know you have to have the right KPG software and the boards are not compatable. You have to have a version 1 control board with a version 1 RF board etc... They will not cross versions. - Original Message - From: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com To: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com Sent: Sun Apr 12 13:35:10 2009 Subject: RE: [Repeater-Builder] TKR-750 Norm, I am not getting any error message at this time and I am about 90 % sure it is a version 1 as you said. Also Mike has asked me to call him for some information and I will do that. I think I told everyone earlier that I did get the KPG66D to work as long as I didn’t put the repeater in PROG mode. My frequencies are still set so it is just a matter or tuning the VCO now. Duplexers are tuned and antenna and coax are ready to go. I am going to finish the alignment process regardless of the voltage and then make a second round of checking to see if I can peak it more. Randy From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of NORM KNAPP Sent: Friday, April 10, 2009 9:32 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] TKR-750 If the repeater pll was unlocked, you probably get E1 or E3 on the display along with a continous beeep. I have firmware that will work with your repeater. It basically changes the courtesy tone so that it sounds with COR drop and not hang time drop. If you are using KPG-66D, the I am pretty sure you have a version 1. - Original Message - From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Sent: Fri Apr 10 18:06:00 2009 Subject: RE: [Repeater-Builder] TKR-750 I do not know for sure what version it is but it must be Version 1 as I can’t find anything saying version 2. I use KPG 66d for the software. I think the later version uses kpg 91 for something like that. If I just turn the repeater on and not hold the pf-1 key then I get the screen for channel entry. I would like to know if there is a firmware upgrade and how it is done. It surely can’t be done through 66d as it says there is a connection error. I am thinking maybe since the frequency is so low that I may have to bring other things inline before I can get 8 volts. Tell me one thing……..is there an led somewhere that tells me if it is locked on frequency or unlocked? Randy From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com ] On Behalf Of NORM KNAPP Sent: Tuesday, April 07, 2009 9:50 PM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: Re: [Repeater-Builder] TKR-750 Sounds like you have a K-1 alright. Firmware is kinda like BIOS. Holding dowd PF-1 while powering up puts it into FIRMWARE program mode. The number of decimals or periods showing on the display tell you what baud rate to program the firmware in at. Now, do you have a version 1 or 2 radio? What KPG software are you using? I must say I am a bit surprised you cannot get the VCO voltage to 8 volts, but 5 should be ok anyway. - Original Message - From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Sent: Tue Apr 07 19:42:31 2009 Subject: RE: [Repeater-Builder] TKR-750 It only says K-1. Goes from 146.000 to 174.000 or something near that. I am confused at what the manual calls firmware. Is that like bios in a computer or does it also take in programming the channels. Also the manual talks about holding PF1 while turning on the repeater to put it in programming mode. If I do that, then I can’t get the software to work. If I just turn on the computer without holding anything, then the software will work. Then there is also reference to K,E. Is E just
RE: [Repeater-Builder] TKR-750
The service manual is in the Kenwood section of the sight. Jeff _ From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Randy Brumback Sent: Friday, April 10, 2009 4:06 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] TKR-750 I do not know for sure what version it is but it must be Version 1 as I can't find anything saying version 2. I use KPG 66d for the software. I think the later version uses kpg 91 for something like that. If I just turn the repeater on and not hold the pf-1 key then I get the screen for channel entry. I would like to know if there is a firmware upgrade and how it is done. It surely can't be done through 66d as it says there is a connection error. I am thinking maybe since the frequency is so low that I may have to bring other things inline before I can get 8 volts. Tell me one thingis there an led somewhere that tells me if it is locked on frequency or unlocked? Randy From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of NORM KNAPP Sent: Tuesday, April 07, 2009 9:50 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] TKR-750 Sounds like you have a K-1 alright. Firmware is kinda like BIOS. Holding dowd PF-1 while powering up puts it into FIRMWARE program mode. The number of decimals or periods showing on the display tell you what baud rate to program the firmware in at. Now, do you have a version 1 or 2 radio? What KPG software are you using? I must say I am a bit surprised you cannot get the VCO voltage to 8 volts, but 5 should be ok anyway. - Original Message - From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Sent: Tue Apr 07 19:42:31 2009 Subject: RE: [Repeater-Builder] TKR-750 It only says K-1. Goes from 146.000 to 174.000 or something near that. I am confused at what the manual calls firmware. Is that like bios in a computer or does it also take in programming the channels. Also the manual talks about holding PF1 while turning on the repeater to put it in programming mode. If I do that, then I can't get the software to work. If I just turn on the computer without holding anything, then the software will work. Then there is also reference to K,E. Is E just another model? Anyway, what do I need to do to get the test points up to 8 volts? About 5 is the highest I can get. The repeater was originally on a frequency in the high 150's. Randy From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com ] On Behalf Of NORM KNAPP Sent: Tuesday, April 07, 2009 3:59 PM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: Re: [Repeater-Builder] TKR-750 Are you tuning the TX or the RX VCO? The K and the K2 overlap coverage from 146 to 150mhz. From what I understand the RX pre-select really determines freq coverage on those models. - Original Message - From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Sent: Tue Apr 07 12:57:47 2009 Subject: Re: [Repeater-Builder] TKR-750 At 10:18 AM 4/7/2009, Randy Brumback wrote: I need to tune the VCO for my amateur frequency in the TKR-750. Does this unit need to be hooked to the computer and set in some way before tuning? I am at the very low end of what the repeater will program to at 147.060 and I can't get the right voltage on the Test Point by tuning the capacitor. The voltage is well below what it should be. ---Must not be a K2 version. Is it a K? But no, it does not need to be connected to a PC in order to align it Ken -- President and CTO - Arcom Communications Makers of repeater controllers and accessories. http://www.arcomcontrollers.com/ http://www.arcomcontrollers.com/ http://www.arcomcontrollers.com/ http://www.arcomcontrollers.com/ Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net http://www.irlp.net http://www.irlp.net http://www.irlp.net We don't just make 'em. We use 'em!
RE: [Repeater-Builder] TKR-750
Randy, Contact me off the list and I can get you the PDF of the correct manual and tell you some info on the repeater. Colorado Telecom, L.L.C Mike Mullarkey 6886 Sage Ave Firestone, Co 80504 303-954-9695 Home 303-954-9693 Home Office Fax 303-718-8052 Cellular _ From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Yahoo Sent: Saturday, April 11, 2009 12:29 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] TKR-750 The service manual is in the Kenwood section of the sight. Jeff _ From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Randy Brumback Sent: Friday, April 10, 2009 4:06 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] TKR-750 I do not know for sure what version it is but it must be Version 1 as I can't find anything saying version 2. I use KPG 66d for the software. I think the later version uses kpg 91 for something like that. If I just turn the repeater on and not hold the pf-1 key then I get the screen for channel entry. I would like to know if there is a firmware upgrade and how it is done. It surely can't be done through 66d as it says there is a connection error. I am thinking maybe since the frequency is so low that I may have to bring other things inline before I can get 8 volts. Tell me one thingis there an led somewhere that tells me if it is locked on frequency or unlocked? Randy From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of NORM KNAPP Sent: Tuesday, April 07, 2009 9:50 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] TKR-750 Sounds like you have a K-1 alright. Firmware is kinda like BIOS. Holding dowd PF-1 while powering up puts it into FIRMWARE program mode. The number of decimals or periods showing on the display tell you what baud rate to program the firmware in at. Now, do you have a version 1 or 2 radio? What KPG software are you using? I must say I am a bit surprised you cannot get the VCO voltage to 8 volts, but 5 should be ok anyway. - Original Message - From: Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com To: Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com Sent: Tue Apr 07 19:42:31 2009 Subject: RE: [Repeater-Builder] TKR-750 It only says K-1. Goes from 146.000 to 174.000 or something near that. I am confused at what the manual calls firmware. Is that like bios in a computer or does it also take in programming the channels. Also the manual talks about holding PF1 while turning on the repeater to put it in programming mode. If I do that, then I can't get the software to work. If I just turn on the computer without holding anything, then the software will work. Then there is also reference to K,E. Is E just another model? Anyway, what do I need to do to get the test points up to 8 volts? About 5 is the highest I can get. The repeater was originally on a frequency in the high 150's. Randy From: Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com [mailto:Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com] On Behalf Of NORM KNAPP Sent: Tuesday, April 07, 2009 3:59 PM To: Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com Subject: Re: [Repeater-Builder] TKR-750 Are you tuning the TX or the RX VCO? The K and the K2 overlap coverage from 146 to 150mhz. From what I understand the RX pre-select really determines freq coverage on those models. - Original Message - From: Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com To: Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@ mailto:Repeater-Builder%40yahoogroups.com yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Sent: Tue Apr 07 12:57:47 2009 Subject: Re: [Repeater-Builder] TKR-750 At 10:18 AM 4/7/2009, Randy Brumback wrote: I need to tune the VCO for my amateur frequency in the TKR-750. Does this unit need to be hooked to the computer and set in some way before tuning? I am at the very low end of what the repeater will program to at 147.060 and I can't get the right voltage on the Test Point by tuning the capacitor. The voltage is well below what it should be. ---Must not be a K2 version. Is it a K? But no, it does not need to be connected to a PC in order to align it Ken -- President and CTO - Arcom
RE: [Repeater-Builder] TKR-750
I do not know for sure what version it is but it must be Version 1 as I can’t find anything saying version 2. I use KPG 66d for the software. I think the later version uses kpg 91 for something like that. If I just turn the repeater on and not hold the pf-1 key then I get the screen for channel entry. I would like to know if there is a firmware upgrade and how it is done. It surely can’t be done through 66d as it says there is a connection error. I am thinking maybe since the frequency is so low that I may have to bring other things inline before I can get 8 volts. Tell me one thing……..is there an led somewhere that tells me if it is locked on frequency or unlocked? Randy From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of NORM KNAPP Sent: Tuesday, April 07, 2009 9:50 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] TKR-750 Sounds like you have a K-1 alright. Firmware is kinda like BIOS. Holding dowd PF-1 while powering up puts it into FIRMWARE program mode. The number of decimals or periods showing on the display tell you what baud rate to program the firmware in at. Now, do you have a version 1 or 2 radio? What KPG software are you using? I must say I am a bit surprised you cannot get the VCO voltage to 8 volts, but 5 should be ok anyway. - Original Message - From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Sent: Tue Apr 07 19:42:31 2009 Subject: RE: [Repeater-Builder] TKR-750 It only says K-1. Goes from 146.000 to 174.000 or something near that. I am confused at what the manual calls firmware. Is that like bios in a computer or does it also take in programming the channels. Also the manual talks about holding PF1 while turning on the repeater to put it in programming mode. If I do that, then I can’t get the software to work. If I just turn on the computer without holding anything, then the software will work. Then there is also reference to K,E. Is E just another model? Anyway, what do I need to do to get the test points up to 8 volts? About 5 is the highest I can get. The repeater was originally on a frequency in the high 150’s. Randy From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com ] On Behalf Of NORM KNAPP Sent: Tuesday, April 07, 2009 3:59 PM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: Re: [Repeater-Builder] TKR-750 Are you tuning the TX or the RX VCO? The K and the K2 overlap coverage from 146 to 150mhz. From what I understand the RX pre-select really determines freq coverage on those models. - Original Message - From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Sent: Tue Apr 07 12:57:47 2009 Subject: Re: [Repeater-Builder] TKR-750 At 10:18 AM 4/7/2009, Randy Brumback wrote: I need to tune the VCO for my amateur frequency in the TKR-750. Does this unit need to be hooked to the computer and set in some way before tuning? I am at the very low end of what the repeater will program to at 147.060 and I can't get the right voltage on the Test Point by tuning the capacitor. The voltage is well below what it should be. ---Must not be a K2 version. Is it a K? But no, it does not need to be connected to a PC in order to align it Ken -- President and CTO - Arcom Communications Makers of repeater controllers and accessories. http://www.arcomcontrollers.com/ http://www.arcomcontrollers.com/ http://www.arcomcontrollers.com/ http://www.arcomcontrollers.com/ Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net http://www.irlp.net http://www.irlp.net http://www.irlp.net We don't just make 'em. We use 'em!
Re: [Repeater-Builder] TKR-750
If the repeater pll was unlocked, you probably get E1 or E3 on the display along with a continous beeep. I have firmware that will work with your repeater. It basically changes the courtesy tone so that it sounds with COR drop and not hang time drop. If you are using KPG-66D, the I am pretty sure you have a version 1. - Original Message - From: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com To: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com Sent: Fri Apr 10 18:06:00 2009 Subject: RE: [Repeater-Builder] TKR-750 I do not know for sure what version it is but it must be Version 1 as I can’t find anything saying version 2. I use KPG 66d for the software. I think the later version uses kpg 91 for something like that. If I just turn the repeater on and not hold the pf-1 key then I get the screen for channel entry. I would like to know if there is a firmware upgrade and how it is done. It surely can’t be done through 66d as it says there is a connection error. I am thinking maybe since the frequency is so low that I may have to bring other things inline before I can get 8 volts. Tell me one thing……..is there an led somewhere that tells me if it is locked on frequency or unlocked? Randy From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of NORM KNAPP Sent: Tuesday, April 07, 2009 9:50 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] TKR-750 Sounds like you have a K-1 alright. Firmware is kinda like BIOS. Holding dowd PF-1 while powering up puts it into FIRMWARE program mode. The number of decimals or periods showing on the display tell you what baud rate to program the firmware in at. Now, do you have a version 1 or 2 radio? What KPG software are you using? I must say I am a bit surprised you cannot get the VCO voltage to 8 volts, but 5 should be ok anyway. - Original Message - From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Sent: Tue Apr 07 19:42:31 2009 Subject: RE: [Repeater-Builder] TKR-750 It only says K-1. Goes from 146.000 to 174.000 or something near that. I am confused at what the manual calls firmware. Is that like bios in a computer or does it also take in programming the channels. Also the manual talks about holding PF1 while turning on the repeater to put it in programming mode. If I do that, then I can’t get the software to work. If I just turn on the computer without holding anything, then the software will work. Then there is also reference to K,E. Is E just another model? Anyway, what do I need to do to get the test points up to 8 volts? About 5 is the highest I can get. The repeater was originally on a frequency in the high 150’s. Randy From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com ] On Behalf Of NORM KNAPP Sent: Tuesday, April 07, 2009 3:59 PM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: Re: [Repeater-Builder] TKR-750 Are you tuning the TX or the RX VCO? The K and the K2 overlap coverage from 146 to 150mhz. From what I understand the RX pre-select really determines freq coverage on those models. - Original Message - From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Sent: Tue Apr 07 12:57:47 2009 Subject: Re: [Repeater-Builder] TKR-750 At 10:18 AM 4/7/2009, Randy Brumback wrote: I need to tune the VCO for my amateur frequency in the TKR-750. Does this unit need to be hooked to the computer and set in some way before tuning? I am at the very low end of what the repeater will program to at 147.060 and I can't get the right voltage on the Test Point by tuning the capacitor. The voltage is well below what it should be. ---Must not be a K2 version. Is it a K? But no, it does not need to be connected to a PC in order to align it Ken -- President and CTO - Arcom Communications Makers of repeater controllers and accessories. http://www.arcomcontrollers.com/ http://www.arcomcontrollers.com/ http://www.arcomcontrollers.com/ http://www.arcomcontrollers.com/ http
Re: [Repeater-Builder] TKR-750
At 10:18 AM 4/7/2009, Randy Brumback wrote: I need to tune the VCO for my amateur frequency in the TKR-750. Does this unit need to be hooked to the computer and set in some way before tuning? I am at the very low end of what the repeater will program to at 147.060 and I can't get the right voltage on the Test Point by tuning the capacitor. The voltage is well below what it should be. ---Must not be a K2 version. Is it a K? But no, it does not need to be connected to a PC in order to align it Ken -- President and CTO - Arcom Communications Makers of repeater controllers and accessories. http://www.arcomcontrollers.com/ Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net We don't just make 'em. We use 'em!
Re: [Repeater-Builder] TKR-750
Are you tuning the TX or the RX VCO? The K and the K2 overlap coverage from 146 to 150mhz. From what I understand the RX pre-select really determines freq coverage on those models. - Original Message - From: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com To: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com Sent: Tue Apr 07 12:57:47 2009 Subject: Re: [Repeater-Builder] TKR-750 At 10:18 AM 4/7/2009, Randy Brumback wrote: I need to tune the VCO for my amateur frequency in the TKR-750. Does this unit need to be hooked to the computer and set in some way before tuning? I am at the very low end of what the repeater will program to at 147.060 and I can't get the right voltage on the Test Point by tuning the capacitor. The voltage is well below what it should be. ---Must not be a K2 version. Is it a K? But no, it does not need to be connected to a PC in order to align it Ken -- President and CTO - Arcom Communications Makers of repeater controllers and accessories. http://www.arcomcontrollers.com/ http://www.arcomcontrollers.com/ Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net http://www.irlp.net We don't just make 'em. We use 'em!
RE: [Repeater-Builder] TKR-750
It only says K-1. Goes from 146.000 to 174.000 or something near that. I am confused at what the manual calls firmware. Is that like bios in a computer or does it also take in programming the channels. Also the manual talks about holding PF1 while turning on the repeater to put it in programming mode. If I do that, then I can’t get the software to work. If I just turn on the computer without holding anything, then the software will work. Then there is also reference to K,E. Is E just another model? Anyway, what do I need to do to get the test points up to 8 volts? About 5 is the highest I can get. The repeater was originally on a frequency in the high 150’s. Randy From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of NORM KNAPP Sent: Tuesday, April 07, 2009 3:59 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] TKR-750 Are you tuning the TX or the RX VCO? The K and the K2 overlap coverage from 146 to 150mhz. From what I understand the RX pre-select really determines freq coverage on those models. - Original Message - From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Sent: Tue Apr 07 12:57:47 2009 Subject: Re: [Repeater-Builder] TKR-750 At 10:18 AM 4/7/2009, Randy Brumback wrote: I need to tune the VCO for my amateur frequency in the TKR-750. Does this unit need to be hooked to the computer and set in some way before tuning? I am at the very low end of what the repeater will program to at 147.060 and I can't get the right voltage on the Test Point by tuning the capacitor. The voltage is well below what it should be. ---Must not be a K2 version. Is it a K? But no, it does not need to be connected to a PC in order to align it Ken -- President and CTO - Arcom Communications Makers of repeater controllers and accessories. http://www.arcomcontrollers.com/ http://www.arcomcontrollers.com/ Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net http://www.irlp.net We don't just make 'em. We use 'em!
Re: [Repeater-Builder] TKR-750
Sounds like you have a K-1 alright. Firmware is kinda like BIOS. Holding dowd PF-1 while powering up puts it into FIRMWARE program mode. The number of decimals or periods showing on the display tell you what baud rate to program the firmware in at. Now, do you have a version 1 or 2 radio? What KPG software are you using? I must say I am a bit surprised you cannot get the VCO voltage to 8 volts, but 5 should be ok anyway. - Original Message - From: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com To: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com Sent: Tue Apr 07 19:42:31 2009 Subject: RE: [Repeater-Builder] TKR-750 It only says K-1. Goes from 146.000 to 174.000 or something near that. I am confused at what the manual calls firmware. Is that like bios in a computer or does it also take in programming the channels. Also the manual talks about holding PF1 while turning on the repeater to put it in programming mode. If I do that, then I can’t get the software to work. If I just turn on the computer without holding anything, then the software will work. Then there is also reference to K,E. Is E just another model? Anyway, what do I need to do to get the test points up to 8 volts? About 5 is the highest I can get. The repeater was originally on a frequency in the high 150’s. Randy From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of NORM KNAPP Sent: Tuesday, April 07, 2009 3:59 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] TKR-750 Are you tuning the TX or the RX VCO? The K and the K2 overlap coverage from 146 to 150mhz. From what I understand the RX pre-select really determines freq coverage on those models. - Original Message - From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Sent: Tue Apr 07 12:57:47 2009 Subject: Re: [Repeater-Builder] TKR-750 At 10:18 AM 4/7/2009, Randy Brumback wrote: I need to tune the VCO for my amateur frequency in the TKR-750. Does this unit need to be hooked to the computer and set in some way before tuning? I am at the very low end of what the repeater will program to at 147.060 and I can't get the right voltage on the Test Point by tuning the capacitor. The voltage is well below what it should be. ---Must not be a K2 version. Is it a K? But no, it does not need to be connected to a PC in order to align it Ken -- President and CTO - Arcom Communications Makers of repeater controllers and accessories. http://www.arcomcontrollers.com/ http://www.arcomcontrollers.com/ http://www.arcomcontrollers.com/ http://www.arcomcontrollers.com/ Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net http://www.irlp.net http://www.irlp.net http://www.irlp.net We don't just make 'em. We use 'em!
RE: [Repeater-Builder] TKR-750 New PA Schematic
Gareth, The Service Manual for the old Kenwood TKR-750 Repeaters, those with serial numbers below 6071, is B51-8556-10, currently priced at $22.40. The Service Manual for the new TKR-750 version, with serial numbers above 6071, is B51-8556-20, currently priced at $32.67. Both manuals are available from Pacific Coast Parts, www.pacparts.com 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Gareth Bennett Sent: Wednesday, November 14, 2007 10:34 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] TKR-750 New PA Schematic Hi Group, Does anybody have an electronic copy of the new (Replacement) Power Amplifier for the TKR-750 that they could pass along? I'm having to swap out a failed early unit with a later retro board and discovered an extra 620pF chip capacitor supplied separately. Any ideas? All the best and thanks for reading _ Gareth Bennett
Re: [Repeater-Builder] TKR-750 P/A Failures
Thanks for the feedback Gents... (Eric, I will get the serial number to you for your info). ... Interestingly this repeater was operating on a very lightly loaded channel, through a TX combiner, so was seeing a nice 50Z load. It was running at 50 watts but out of one hour there would have been only 10 minutes of that time in TX. Of the 15 Watts @ 7 Amps, the signal was so very spurious that for the health of the site it was removed from service immediately. As for the RX sensitivity, I know the Tech who commissioned the -750 and he is pretty pedantic, often bordering on the extreme, so I can only summarise that it was set up correctly and according to the book. (As was the VXR-9000). What alerted us to the fault was not the complaint of low TX power, as 9 times out of 10 the subscriber would not be able to recognise the difference between 15 or 50 watts, but the incredible amount of crap that this thing was spewing out all over the band, and into other channels on site when keyed. Once on site Spec-An proved the culprit pretty quick :-) Regards _ Gareth Bennett This e-mail is confidential, if you received this message in error, or you are not the intended recipient, please return it to the sender and destroy any copies. Thank you. - Original Message - From: Eric Lemmon To: Repeater-Builder@yahoogroups.com Sent: Monday, March 19, 2007 10:04 AM Subject: RE: [Repeater-Builder] TKR-750 P/A Failures Jeff, You bring up an important point. While my previous post was about tuning the receiver, it is always necessary to avoid either overloading, overheating, or mismatching the PA in the TKR-x50 or in any other radio. That's why I put at least a single ferrite isolator at the TX output to provide a stable 50 ohm load for the PA. It may come as a surprise to the owners of offshore-produced mobile radios that you can burn up a PA by running the radio at low power! A case in point: My radio club has a Yaesu FT-2500M that is the 2m side of a packet node. Mindful of the high elevation of the packet site, we had the radio set for the lowest of its four power levels. After a year of trouble-free service, it died from a toasted RF module. I replaced the module- which cost about $85 as I recall- and bench-tested the radio afterwards. It seems that the current draw of the radio varied relatively little as the RF output power was changed. In fact, the current draw at the lowest output power of about 6 watts was 85% of the current draw at maximum output power of about 45 watts! Do the numbers, and you'll see that the extra power being consumed was going into heating the PA module instead of being radiated as RF. At full power, the PA runs Class C and is fairly efficient. But at reduced drive, the PA is running Class AB or B (gasp!) and becomes remarkably inefficient. And why is this? Because the radio designers didn't do all of their homework to ensure that the PA would maintain its efficiency throughout the power level adjustment. Thus, an Amateur Radio operator who diligently uses the minimum power necessary for communication may be toasting the PA in his or her radio! Finally, the power efficiency is only part of the issue here. The other part, which Jeff mentioned, is that a PA which is operated at a point below its specified range may become a prolific generator of spurious signals. That's not good! 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Yahoo Sent: Sunday, March 18, 2007 11:01 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] TKR-750 P/A Failures Absolutely correct Eric. The TKR-750 comes factory tuned for wideband base station operation. The TKR-750 does NOT like anything but a good 50ohm load. The transmitter will go spurious. I have never had a problem with a version 1 or 2 with a properly matched transmit path. Maybe just luck. I have also seen transmitters that will go spurious below 10 watts. While the TKR750/850 has some quirks, they have performed fairly well even in high RF environments. Jeff -Original Message- From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com ] On Behalf Of Eric Lemmon Sent: Sunday, March 18, 2007 9:51 AM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: RE: [Repeater-Builder] TKR-750 P/A Failures Gareth, Your statement about the receive sensitivity caught my eye. I have to wonder: Was the front end of your repeater's receiver ever aligned for optimum sensitivity on your RX channel? Of the several TKR-750 repeaters I have worked on over the years, only one of them was properly adjusted
Re: [Repeater-Builder] TKR-750 P/A Failures
Gareth Bennett wrote: Interestingly we replaced the -750 with a Vertex VXR-9000 repeater and commissioning tests revealed about 3 dB better sensitivity than the 750's for 12dB Sinad. Hmmm-you might check effective sensitivity with the antenna connected, etc, and see what you get. --- Jim Barbour WD8CHL
RE: [Repeater-Builder] TKR-750 P/A Failures
Gareth, Be aware that a TX combiner can be a very reactive load, as is a duplexer, and the transmitter PA may react quite differently when feeding the combiner than when feeding a nice, stable, non-reactive load such as a resistive dummy load. Moreover, you should not assume that your transmitter is properly terminated, merely because it is feeding a TX combiner. Transmitter combiners can be manna from Heaven- but they can, under certain circumstances, be from the Nether World. When a hybrid-ferrite combiner is used with cavities, a great deal of engineering must be done to stabilize the system. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Gareth Bennett Sent: Monday, March 19, 2007 3:35 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] TKR-750 P/A Failures Thanks for the feedback Gents... (Eric, I will get the serial number to you for your info). ... Interestingly this repeater was operating on a very lightly loaded channel, through a TX combiner, so was seeing a nice 50Z load. It was running at 50 watts but out of one hour there would have been only 10 minutes of that time in TX. Of the 15 Watts @ 7 Amps, the signal was so very spurious that for the health of the site it was removed from service immediately. As for the RX sensitivity, I know the Tech who commissioned the -750 and he is pretty pedantic, often bordering on the extreme, so I can only summarise that it was set up correctly and according to the book. (As was the VXR-9000). What alerted us to the fault was not the complaint of low TX power, as 9 times out of 10 the subscriber would not be able to recognise the difference between 15 or 50 watts, but the incredible amount of crap that this thing was spewing out all over the band, and into other channels on site when keyed. Once on site Spec-An proved the culprit pretty quick :-) Regards _ Gareth Bennett - Original Message - From: Eric Lemmon mailto:[EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder@yahoogroups.com Sent: Monday, March 19, 2007 10:04 AM Subject: RE: [Repeater-Builder] TKR-750 P/A Failures Jeff, You bring up an important point. While my previous post was about tuning the receiver, it is always necessary to avoid either overloading, overheating, or mismatching the PA in the TKR-x50 or in any other radio. That's why I put at least a single ferrite isolator at the TX output to provide a stable 50 ohm load for the PA. It may come as a surprise to the owners of offshore-produced mobile radios that you can burn up a PA by running the radio at low power! A case in point: My radio club has a Yaesu FT-2500M that is the 2m side of a packet node. Mindful of the high elevation of the packet site, we had the radio set for the lowest of its four power levels. After a year of trouble-free service, it died from a toasted RF module. I replaced the module- which cost about $85 as I recall- and bench-tested the radio afterwards. It seems that the current draw of the radio varied relatively little as the RF output power was changed. In fact, the current draw at the lowest output power of about 6 watts was 85% of the current draw at maximum output power of about 45 watts! Do the numbers, and you'll see that the extra power being consumed was going into heating the PA module instead of being radiated as RF. At full power, the PA runs Class C and is fairly efficient. But at reduced drive, the PA is running Class AB or B (gasp!) and becomes remarkably inefficient. And why is this? Because the radio designers didn't do all of their homework to ensure that the PA would maintain its efficiency throughout the power level adjustment. Thus, an Amateur Radio operator who diligently uses the minimum power necessary for communication may be toasting the PA in his or her radio! Finally, the power efficiency is only part of the issue here. The other part, which Jeff mentioned, is that a PA which is operated at a point below its specified range may become a prolific generator of spurious signals. That's not good! 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com ] On Behalf Of Yahoo Sent: Sunday, March 18, 2007 11:01 AM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: RE: [Repeater-Builder] TKR-750 P
RE: [Repeater-Builder] TKR-750 P/A Failures
Gareth, Don't know about the 750 but Kenwood replaced all five PA in my TKR-850 trunk system, paid the labor and everything. All I paid was a penny each for the parts. Paul _ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Gareth Bennett Sent: Sunday, March 18, 2007 6:09 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] TKR-750 P/A Failures Hi Group, Can anybody out there enlighten me on the power amp failures on the earlier Kenwood TKR-750 Repeaters? I recall that Kenwood was scrambling around changing these under warranty when the 750 was first released. I have just removed one from service that was only pushing 15 Watts @ 7 Amps (Set for High power). This particular repeater has already suffered dry joints around the PA stage which was not the cause of fault this time. Can any Kenwood dealers shed some light on this common problem and suggest the replacement P/A part number for around 150-160 MHz? Interestingly we replaced the -750 with a Vertex VXR-9000 repeater and commissioning tests revealed about 3 dB better sensitivity than the 750's for 12dB Sinad. Regards _ Gareth Bennett This e-mail is confidential, if you received this message in error, or you are not the intended recipient, please return it to the sender and destroy any copies. Thank you. Visit HYPERLINK http://www.ourazle.comOurAzle.com It's free and you can talk about anything in Azle you like! -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 268.18.14/727 - Release Date: 3/19/2007 11:49 AM -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 268.18.14/727 - Release Date: 3/19/2007 11:49 AM p class=style1Visit a href=http://www.ourazle.com;OurAzle.combrIt's free and you can talk about anything in Azle you like! /a/p
Re: [Repeater-Builder] TKR-750 P/A Failures
Gareth, Email me off the list with the serial number and i will see if we can get it covered under warranty for you. Mike -- Original message -- From: Gareth Bennett [EMAIL PROTECTED] Hi Group, Can anybody out there enlighten me on the power amp failures on the earlier Kenwood TKR-750 Repeaters? I recall that Kenwood was scrambling around changing these under warranty when the 750 was first released. I have just removed one from service that was only pushing 15 Watts @ 7 Amps (Set for High power). This particular repeater has already suffered dry joints around the PA stage which was not the cause of fault this time. Can any Kenwood dealers shed some light on this common problem and suggest the replacement P/A part number for around 150-160 MHz? Interestingly we replaced the -750 with a Vertex VXR-9000 repeater and commissioning tests revealed about 3 dB better sensitivity than the 750's for 12dB Sinad. Regards _ Gareth Bennett This e-mail is confidential, if you received this message in error, or you are not the intended recipient, please return it to the sender and destroy any copies. Thank you.
RE: [Repeater-Builder] TKR-750 P/A Failures
Gareth, Your statement about the receive sensitivity caught my eye. I have to wonder: Was the front end of your repeater's receiver ever aligned for optimum sensitivity on your RX channel? Of the several TKR-750 repeaters I have worked on over the years, only one of them was properly adjusted to optimize the receiver, even though the dealers programmed them before delivery! The instruction manual that is shipped with the repeater makes no mention of this requirement. The fine print under System Setup on page 2 of the service manual states: The RX RF BPF (L2, L3, L5, L6, L7 on TX-RX unit A/2) must be aligned to obtain the maximum sensitivity at a programmed frequency. Even though the TKR-750 is a low-tier repeater intended for non-demanding applications, it does have helical resonators in the front end. When properly tuned, it should at least match and may out-perform the Vertex VXR-9000 in both sensitivity and IM rejection. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Gareth Bennett Sent: Sunday, March 18, 2007 4:09 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] TKR-750 P/A Failures Hi Group, Can anybody out there enlighten me on the power amp failures on the earlier Kenwood TKR-750 Repeaters? I recall that Kenwood was scrambling around changing these under warranty when the 750 was first released. I have just removed one from service that was only pushing 15 Watts @ 7 Amps (Set for High power). This particular repeater has already suffered dry joints around the PA stage which was not the cause of fault this time. Can any Kenwood dealers shed some light on this common problem and suggest the replacement P/A part number for around 150-160 MHz? Interestingly we replaced the -750 with a Vertex VXR-9000 repeater and commissioning tests revealed about 3 dB better sensitivity than the 750's for 12dB Sinad. Regards _ Gareth Bennett
Re: [Repeater-Builder] TKR-750 P/A Failures
At 04:09 AM 3/18/2007, you wrote: Hi Group, Can anybody out there enlighten me on the power amp failures on the earlier Kenwood TKR-750 Repeaters? I recall that Kenwood was scrambling around changing these under warranty when the 750 was first released. I have just removed one from service that was only pushing 15 Watts @ 7 Amps (Set for High power). This particular repeater has already suffered dry joints around the PA stage which was not the cause of fault this time. Can any Kenwood dealers shed some light on this common problem and suggest the replacement P/A part number for around 150-160 MHz? ---I have yet to see a Version 2 PA fail whereas with the pre Version 2 repeaters, PA failures were not uncommon (Version 2's have been out for around 2 years now and the easiest way to ID them is the programming software used - KPG-91D). Then again, if you had a pre Version 2 set for high power in repeater mode, I am not one bit surprised it blew up - you do know they are rated for continuous duty at the 25 watt level only, yes? Interestingly we replaced the -750 with a Vertex VXR-9000 repeater and commissioning tests revealed about 3 dB better sensitivity than the 750's for 12dB Sinad. ---Perhaps the dealer you acquired them from didn't properly align the front end - in well over 100 TKR's that have flowed through us, I have yet to see one that didn't meet SINAD spec once they were tuned to the customer's channel(s). Ken -- President and CTO - Arcom Communications Makers of the world famous RC210 Repeater Controller and accessories. http://www.arcomcontrollers.com/ Coming soon - the most advanced repeater controller EVER. Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net
RE: [Repeater-Builder] TKR-750 P/A Failures
Absolutely correct Eric. The TKR-750 comes factory tuned for wideband base station operation. The TKR-750 does NOT like anything but a good 50ohm load. The transmitter will go spurious. I have never had a problem with a version 1 or 2 with a properly matched transmit path. Maybe just luck. I have also seen transmitters that will go spurious below 10 watts. While the TKR750/850 has some quirks, they have performed fairly well even in high RF environments. Jeff -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Eric Lemmon Sent: Sunday, March 18, 2007 9:51 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] TKR-750 P/A Failures Gareth, Your statement about the receive sensitivity caught my eye. I have to wonder: Was the front end of your repeater's receiver ever aligned for optimum sensitivity on your RX channel? Of the several TKR-750 repeaters I have worked on over the years, only one of them was properly adjusted to optimize the receiver, even though the dealers programmed them before delivery! The instruction manual that is shipped with the repeater makes no mention of this requirement. The fine print under System Setup on page 2 of the service manual states: The RX RF BPF (L2, L3, L5, L6, L7 on TX-RX unit A/2) must be aligned to obtain the maximum sensitivity at a programmed frequency. Even though the TKR-750 is a low-tier repeater intended for non-demanding applications, it does have helical resonators in the front end. When properly tuned, it should at least match and may out-perform the Vertex VXR-9000 in both sensitivity and IM rejection. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Gareth Bennett Sent: Sunday, March 18, 2007 4:09 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] TKR-750 P/A Failures Hi Group, Can anybody out there enlighten me on the power amp failures on the earlier Kenwood TKR-750 Repeaters? I recall that Kenwood was scrambling around changing these under warranty when the 750 was first released. I have just removed one from service that was only pushing 15 Watts @ 7 Amps (Set for High power). This particular repeater has already suffered dry joints around the PA stage which was not the cause of fault this time. Can any Kenwood dealers shed some light on this common problem and suggest the replacement P/A part number for around 150-160 MHz? Interestingly we replaced the -750 with a Vertex VXR-9000 repeater and commissioning tests revealed about 3 dB better sensitivity than the 750's for 12dB Sinad. Regards _ Gareth Bennett
RE: [Repeater-Builder] TKR-750 P/A Failures
Jeff, You bring up an important point. While my previous post was about tuning the receiver, it is always necessary to avoid either overloading, overheating, or mismatching the PA in the TKR-x50 or in any other radio. That's why I put at least a single ferrite isolator at the TX output to provide a stable 50 ohm load for the PA. It may come as a surprise to the owners of offshore-produced mobile radios that you can burn up a PA by running the radio at low power! A case in point: My radio club has a Yaesu FT-2500M that is the 2m side of a packet node. Mindful of the high elevation of the packet site, we had the radio set for the lowest of its four power levels. After a year of trouble-free service, it died from a toasted RF module. I replaced the module- which cost about $85 as I recall- and bench-tested the radio afterwards. It seems that the current draw of the radio varied relatively little as the RF output power was changed. In fact, the current draw at the lowest output power of about 6 watts was 85% of the current draw at maximum output power of about 45 watts! Do the numbers, and you'll see that the extra power being consumed was going into heating the PA module instead of being radiated as RF. At full power, the PA runs Class C and is fairly efficient. But at reduced drive, the PA is running Class AB or B (gasp!) and becomes remarkably inefficient. And why is this? Because the radio designers didn't do all of their homework to ensure that the PA would maintain its efficiency throughout the power level adjustment. Thus, an Amateur Radio operator who diligently uses the minimum power necessary for communication may be toasting the PA in his or her radio! Finally, the power efficiency is only part of the issue here. The other part, which Jeff mentioned, is that a PA which is operated at a point below its specified range may become a prolific generator of spurious signals. That's not good! 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Yahoo Sent: Sunday, March 18, 2007 11:01 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] TKR-750 P/A Failures Absolutely correct Eric. The TKR-750 comes factory tuned for wideband base station operation. The TKR-750 does NOT like anything but a good 50ohm load. The transmitter will go spurious. I have never had a problem with a version 1 or 2 with a properly matched transmit path. Maybe just luck. I have also seen transmitters that will go spurious below 10 watts. While the TKR750/850 has some quirks, they have performed fairly well even in high RF environments. Jeff -Original Message- From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com ] On Behalf Of Eric Lemmon Sent: Sunday, March 18, 2007 9:51 AM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: RE: [Repeater-Builder] TKR-750 P/A Failures Gareth, Your statement about the receive sensitivity caught my eye. I have to wonder: Was the front end of your repeater's receiver ever aligned for optimum sensitivity on your RX channel? Of the several TKR-750 repeaters I have worked on over the years, only one of them was properly adjusted to optimize the receiver, even though the dealers programmed them before delivery! The instruction manual that is shipped with the repeater makes no mention of this requirement. The fine print under System Setup on page 2 of the service manual states: The RX RF BPF (L2, L3, L5, L6, L7 on TX-RX unit A/2) must be aligned to obtain the maximum sensitivity at a programmed frequency. Even though the TKR-750 is a low-tier repeater intended for non-demanding applications, it does have helical resonators in the front end. When properly tuned, it should at least match and may out-perform the Vertex VXR-9000 in both sensitivity and IM rejection. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com ] On Behalf Of Gareth Bennett Sent: Sunday, March 18, 2007 4:09 AM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: [Repeater-Builder] TKR-750 P/A Failures Hi Group, Can anybody out there enlighten me on the power amp failures on the earlier Kenwood TKR-750 Repeaters? I recall that Kenwood was scrambling around changing these under warranty when the 750 was first released. I have just removed one from service that was only pushing 15 Watts @ 7 Amps (Set for High power). This particular repeater has already suffered dry joints around the PA stage which was not the cause of fault this time. Can any Kenwood dealers shed some light on this common problem and suggest the replacement P/A part number for around 150-160 MHz
RE: [Repeater-Builder] TKR-750 850 Power Question
Bill, I recommend if your not familiar with the repeater take it to a Kenwood dealer and have them set it up to your specs. Just a recommendation. Mike Oregon Repeater Linking Group Mike Mullarkey [EMAIL PROTECTED] www.orlg.org -Original Message- From: valleyforge2002 [mailto:[EMAIL PROTECTED] Sent: Sunday, October 31, 2004 3:42 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] TKR-750 850 Power Question Hi all, thanks for the help given so far. This is starting to become very interesting. When setting up the repeaters the power in the software (KPG-66D) is either High or Low, anyone know what are the actual levels that this defaults to when uploaded to the TKR's ? I have a VHF and UHF (Brand New) TKR-750 850 just waiting to be programmed once I get the lead which has been ordered so I am setting up the files making them ready for upload. Regards Bill G0DEO / 9H1IA Yahoo! Groups Links 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] TKR-750 850 Power Question
Bill, The TKR-750 is factory-set for 50W on high power and 25W on low power. There is one pot to set the power level, and the control microprocessor simply adjusts the gain of the feedback loop to select high or low power. The final PA is a 2SK3478 MOSFET transistor which, like most PAs, gets very unstable when driven below specified levels. The above information came from the TKR-750 Service Manual B51-8556-10. I don't have my TKR-850 Service manual handy, but I believe that the high and low power levels are achieved in a similar manner. Be aware that the helical resonators in the receiver's front end must be adjusted for your operating frequency, before placing the repeater in service. There are also soldered jumpers to install when you have the covers removed, for fan control and battery backup options. You really should have the Service Manual in hand before attempting any adjustments or option selection. 73, Eric Lemmon WB6FLY valleyforge2002 wrote: Hi all, thanks for the help given so far. This is starting to become very interesting. When setting up the repeaters the power in the software (KPG-66D) is either High or Low, anyone know what are the actual levels that this defaults to when uploaded to the TKR's ? I have a VHF and UHF (Brand New) TKR-750 850 just waiting to be programmed once I get the lead which has been ordered so I am setting up the files making them ready for upload. Regards Bill G0DEO / 9H1IA Yahoo! Groups Links 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] TKR-750 850 Power Question
Thank you Eric, That is very helpful, That is why I am asking all these questions. ;-) I have not programmed anything yet as I am waiting for the lead to arrive anyway. I have now got the service manuals for both the TKR-750 and the TKR-850 and I will be following the instructions before doing anything. The TKR-750 should be no problem but the TKR-850 will be a bit of a job as it covers 400 to 430 MHz while I need it to cover 430 to 440 MHz here in UK and when installed in Malta. The controller will be an RC210 and the cavities for both are on the way. If you have any other info please send it on as I am learning a lot about these beautiful Kenwood repeaters. Regards ___ William A. Batey ([EMAIL PROTECTED]) G0DEO / 9H1IA / 9H1BBS ___ The information contained in this e-mail is intended only for the person or entity to which it is addressed and may contain confidential and / or privileged material. If you are not the intended recipient of this e-mail, the use of this information or any disclosure, copying or distribution is prohibited and may be unlawful. If you received this in error, please contact the sender and delete the material from any computer. ___ - Original Message - From: Eric Lemmon [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Sunday, October 31, 2004 6:20 PM Subject: Re: [Repeater-Builder] TKR-750 850 Power Question Bill, The TKR-750 is factory-set for 50W on high power and 25W on low power. There is one pot to set the power level, and the control microprocessor simply adjusts the gain of the feedback loop to select high or low power. The final PA is a 2SK3478 MOSFET transistor which, like most PAs, gets very unstable when driven below specified levels. The above information came from the TKR-750 Service Manual B51-8556-10. I don't have my TKR-850 Service manual handy, but I believe that the high and low power levels are achieved in a similar manner. Be aware that the helical resonators in the receiver's front end must be adjusted for your operating frequency, before placing the repeater in service. There are also soldered jumpers to install when you have the covers removed, for fan control and battery backup options. You really should have the Service Manual in hand before attempting any adjustments or option selection. 73, Eric Lemmon WB6FLY valleyforge2002 wrote: Hi all, thanks for the help given so far. This is starting to become very interesting. When setting up the repeaters the power in the software (KPG-66D) is either High or Low, anyone know what are the actual levels that this defaults to when uploaded to the TKR's ? I have a VHF and UHF (Brand New) TKR-750 850 just waiting to be programmed once I get the lead which has been ordered so I am setting up the files making them ready for upload. Regards Bill G0DEO / 9H1IA Yahoo! Groups Links Yahoo! Groups Links --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.786 / Virus Database: 532 - Release Date: 29/10/2004 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] TKR-750 850 Power Question
Bill, You're welcome. Since you plan to use an outboard controller, I must assume that you intend to connect the two repeaters back-to-back. Otherwise, they can operate independently since they both have built-in controllers. Remember to disable all of the internal controller attributes when connecting an external controller, else they will create some exasperating conflicts. Hang times and Morse IDs are especially troublesome. On the subject of your needing to operate in the 430-440 MHz band, there may not be a big problem after all. I opened my KPG66D FPU software, and selected the 440-470MHz(E) model. I then proceeded to enter 435.000 and received a frequency out of band error message. However, the frequency I entered was not erased. Had I had a TKR-850 to test, I would have tried writing that data to a radio to see if it was accepted. This is a risky step, but it may work. There are component differences between the various models, so even if the frequencies are accepted, the VCOs may not have enough range to maintain lock or the front end may not tune far enough. You might try contacting Kenwood's engineering department for assistance. I find it hard to accept that the British market is being ignored! 73, Eric Lemmon WB6FLY William A. Batey wrote: Thank you Eric, That is very helpful, That is why I am asking all these questions. ;-) I have not programmed anything yet as I am waiting for the lead to arrive anyway. I have now got the service manuals for both the TKR-750 and the TKR-850 and I will be following the instructions before doing anything. The TKR-750 should be no problem but the TKR-850 will be a bit of a job as it covers 400 to 430 MHz while I need it to cover 430 to 440 MHz here in UK and when installed in Malta. The controller will be an RC210 and the cavities for both are on the way. If you have any other info please send it on as I am learning a lot about these beautiful Kenwood repeaters. Regards ___ William A. Batey ([EMAIL PROTECTED]) G0DEO / 9H1IA / 9H1BBS ___ The information contained in this e-mail is intended only for the person or entity to which it is addressed and may contain confidential and / or privileged material. If you are not the intended recipient of this e-mail, the use of this information or any disclosure, copying or distribution is prohibited and may be unlawful. If you received this in error, please contact the sender and delete the material from any computer. ___ - Original Message - From: Eric Lemmon [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Sunday, October 31, 2004 6:20 PM Subject: Re: [Repeater-Builder] TKR-750 850 Power Question Bill, The TKR-750 is factory-set for 50W on high power and 25W on low power. There is one pot to set the power level, and the control microprocessor simply adjusts the gain of the feedback loop to select high or low power. The final PA is a 2SK3478 MOSFET transistor which, like most PAs, gets very unstable when driven below specified levels. The above information came from the TKR-750 Service Manual B51-8556-10. I don't have my TKR-850 Service manual handy, but I believe that the high and low power levels are achieved in a similar manner. Be aware that the helical resonators in the receiver's front end must be adjusted for your operating frequency, before placing the repeater in service. There are also soldered jumpers to install when you have the covers removed, for fan control and battery backup options. You really should have the Service Manual in hand before attempting any adjustments or option selection. 73, Eric Lemmon WB6FLY valleyforge2002 wrote: Hi all, thanks for the help given so far. This is starting to become very interesting. When setting up the repeaters the power in the software (KPG-66D) is either High or Low, anyone know what are the actual levels that this defaults to when uploaded to the TKR's ? I have a VHF and UHF (Brand New) TKR-750 850 just waiting to be programmed once I get the lead which has been ordered so I am setting up the files making them ready for upload. Regards Bill G0DEO / 9H1IA Yahoo! Groups Links Yahoo! Groups Links --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.786 / Virus Database: 532 - Release Date: 29/10/2004 Yahoo! Groups Links 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
