[Repeater-Builder] Trip lite
Anybody out there in radio land have schematics for Trip-lite power supplies. I have two PR 25A with different regulator boards. One works the other doesn't. Good ps 14vdc no load 13 vdc full load Bad ps 15.8 vdc did not try a load yet. Bad unit has an updated regulator board so I can't compare apples to apples. Ralph, W7HSG
Re: [Repeater-Builder] Re: DC Electrical Systems (AC & DC Tube Radios)
Yes, but we did it with B&W and early tube Colour TV's - Original Message - From: "skipp025" To: Repeater-Builder@yahoogroups.com Sent: Thursday, August 26, 2010 10:11:35 AM Subject: [Repeater-Builder] Re: DC Electrical Systems (AC & DC Tube Radios) > "Ralph S. Turk" wrote: > When I worked for Westinghouse Intl in the 60's, we > manufactured a special line of TV's, radios, and small > appliances for DC sections of the world. Our main office > was in New York City and we would get customers from > areas in NYC, SF and some other cities I can not remember > that only had 110VDC available. A lot of those old tube radios would operate on AC and DC and were often known as 5-tube AC & DC Radios. The tube heaters were all in a series string. cheers, s.
Re: [Repeater-Builder] DC Electrical Systems
When I worked for Westinghouse Intl in the 60's, we manufactured a special line of TV's, radios, and small appliances for DC sections of the world. Our main office was in New York City and we would get customers from areas in NYC, SF and some other cities I can not remember that only had 110VDC available. Ralph W7HSG - Original Message - From: "skipp025" To: Repeater-Builder@yahoogroups.com Sent: Thursday, August 26, 2010 8:27:41 AM Subject: [Repeater-Builder] DC Electrical Systems > Mike Morris wrote: > And actually the DC distribution system was more common > than you think. So is live steam... In large cities like San Francisco you can still find utility supplied DC and steam. Most of the Hydro Plants I've ever worked in were operated off/from a very large bank of series connected station size lead-acid batteries. The plant can start under its own 120 Vdc bank of batteries if the grid source is unavailable. There's a lot of DC and Steam still out there... > I recently was up at the Mt. Wilson observatory and was > inside the 100-inch telescope dome. ALL of the controls > for the telescope, the dome slit motors (the ones that > slide the panel open the telescope to look through), the > dome rotation motor (which is surprisingly small for the > load), everything but the overhead lighting is 120v DC. > And has been since about 1918. > Even the ballast tubes for the control are original carbon > filament bulbs. > I have alot of photos/ > Mike WA6ILQ > > At 02:13 AM 08/24/10, you wrote: > > >We had our fill of those here, too. The "hot" side of the AC line > >(if you were lucky, polarized plugs were rare in those days) was > >connected directly to a 35W4 or some such half wave rectifier tube > >and later to a selenium half wave rectifier with the other side of > >the AC line being connected as the negative lead (fortunately NOT to > >the chassis). Usually, there were a couple of 0.01uf capacitors > >from each side of the line to the chassis, however. Doubt I need to > >explain the joys one could experience with that arrangement! And, > >to top it off, each and every one of those radios proudly bore our > >UL stamp of approval! They used to call them AC/DC radios because, > >if you lucked out and got the polarity right, the radio didn't care > >what the source was as long as it was somewhere near 100 volts DC or RMS. > >Tom > > > >--- In Repeater-Builder@yahoogroups.com , Gordon Cooper wrote: > > > > > > Another quirk. > > > > > > > > > Sixty plus years ago in England, power factor was not > > > the main concern. Many of the domestic radio receivers > > > were transformerless and used half-wave rectification to > > > obtain D.C. for the tubes. A consequence was a fair dose > > > of D.C. flowing in the street power mains. > > > > > > Gordon ZL1KL > > > Tauranga N.Z. > > > > > > > > > > > > > > > > > > > > >Yahoo! Groups Links > > > > > > >
Re: [Repeater-Builder] Spectrum Comms SCR200A 220 receiver question
Try "Dans Small Parts and Kits.net" All one word (no spaces) He seems to have a lot of different trimmers listed. Ralph,W7HSG - Original Message - From: "Joe" To: Repeater-Builder@yahoogroups.com Sent: Tuesday, August 24, 2010 8:11:22 AM Subject: [Repeater-Builder] Spectrum Comms SCR200A 220 receiver question I've been working on a clubs 223.96Mhz repeater that the receiver lost sensitivity. It went deaf, so much that the squelch would not even work. It appears that the plastic variable capacitors in the front end have gone bad. It was in a very damp water tank environment and this summer was just too much for it. Anyway, has anyone found a good ceramic replacement for the plastic caps that are a drop-in replacement for the plastic caps in a Spectrum receiver? I think I'm just going to change them all and be done with it. The caps in the 220 version of the receiver are 20 picofarads. The club has 5 more Spectrum receivers that will probably need cap replacement too, some on 2 meters, 440 and 220. I only want to do this once and make it an easy repair. If I found a good replacement part I'll buy a load of them in various sizes. It seems that there is a very low interest in repeater repair over the years. I get many requests for fixing repeaters, and I'm surprised that it is so hard get someone to even hold the flashlight. It's discouraging.I would like to see some interest for the future of repeaters and ham radio. Others experiencing this? The younger hams just don't seem to have the curiosity that I had years ago. 73, Joe, k1ike
[Repeater-Builder] Telewave
Anybody in the group know the correct length of the coax for the Telewave TPRD 1556 duplexer. Need cavity interconnect and combiner lengths. RG 142 Original frequency 155.5 New Frequency 146.8/146.2 Ralph, W7HSG
Re: [Repeater-Builder] Dielectric diplexer
Filter looks like an old GE setup. If so the dummy load more than likely is loaded with PCB and is tuned for about 70 mhz. Same would be true for a RCA. Color of the load is what tips me off. Most of the older loads were not wide bandwidth. Ralph - Original Message - From: "Bill Isom" To: Repeater-Builder@yahoogroups.com Sent: Thursday, August 12, 2010 11:41:30 AM Subject: Re: [Repeater-Builder] Dielectric diplexer I have a picture of the unit. It is on a roll around frame, fed with 3" hardline, and has four cavities. The cavities look to be copper, about 10" dia and a little over 2' tall. Two Bird looking wattmeters are in the photo and there is a massive looking dummy load. Any ideas about converting the 3" hardline to something usable? I figure if I can't get it to 220, those copper cavities will make one heck of a still. 73 Bill N4XIR From: Glenn Little WB4UIV To: Repeater-Builder@yahoogroups.com Sent: Wed, August 11, 2010 10:00:04 PM Subject: Re: [Repeater-Builder] Dielectric diplexer I disassembled one for channel 4. The cavities were about 3 feet in diameter. I salvaged the plungers for the INVAR rods. The diplexer was mounted on a huge roll around aluminum frame. The cavities were connected with 3 inch ridge line. There were four cavities, two fir video and two for audio. There was a 5 KW reject load attached as well as two power meters for 3 in line. The slugs for these look like Bird 43 slugs and will fit into a Bird 43 meter, however, the coupling is wrong for a standard Bird line section, so, the slugs read very low, ie, 500 Watts pins the meter with a 25KW slug installed. Have you seen what you are getting? A friend of mine made fuel tanks for his generator from the channel 4 cavities. I suspect that you could get the cavities to 220 MHz, At 25KW, I suspect that your cavities are also fed with 3 inch rigid line. 73 Glenn WB4UIV At 07:37 PM 8/11/2010, you wrote: >I have just been told I am about to receive a dielectric brand >diplexer rated at 25000 watts on 191 Mhz from a analog TV >station. I feel a little bit like the dog that catches the car he >is chasing. Now that I have it, what can I do with it? Any >ideas? Can it go to 220? Does anyone have any experience with these? >Thanks >Bill N4XIR > > > > > > > >Yahoo! Groups Links > > >
Re: [Repeater-Builder] HP3551A Service manual
I have good news and bad news Good news. Found my manual for the HP 3551. Bad news. The manual is at least several hundred pages with about 30 very long 17" + pages of schematics. Ralph - Original Message - From: "Ralph S. Turk" To: Repeater-Builder@yahoogroups.com Sent: Saturday, August 7, 2010 5:26:37 PM Subject: Re: [Repeater-Builder] HP3551A Service manual I will try to remember tomorrow to look. If you don't hear from me in a day, send me a email Ralph - Original Message - From: petedcur...@gmail.com To: "Repeater-Builder" Sent: Saturday, August 7, 2010 8:18:27 AM Subject: [Repeater-Builder] HP3551A Service manual Hi, I saw someone had used a HP3551A TIMS to set up repeater audio levels. I have a used HP3551A also, but it recently stopped working. Wonder if anyone had schematics? The manual I found online had everything but no schematics. A good high resolution Jpeg photo of the schematics would be greatly appreciated. Peter Ex. G8DCB. Now resident in FL.USA.
Re: [Repeater-Builder] HP3551A Service manual
I will try to remember tomorrow to look. If you don't hear from me in a day, send me a email Ralph - Original Message - From: petedcur...@gmail.com To: "Repeater-Builder" Sent: Saturday, August 7, 2010 8:18:27 AM Subject: [Repeater-Builder] HP3551A Service manual Hi, I saw someone had used a HP3551A TIMS to set up repeater audio levels. I have a used HP3551A also, but it recently stopped working. Wonder if anyone had schematics? The manual I found online had everything but no schematics. A good high resolution Jpeg photo of the schematics would be greatly appreciated. Peter Ex. G8DCB. Now resident in FL.USA.
Re: [Repeater-Builder] AGM Batteries
I would NEVER put any electronics in the battery enclosure. All batteries are known to vent some vapor. Even very little acid or basic vapor will ruin the electronics Been there, have the ruined controller to prove it. Ralph, W7HSG - Original Message - From: "tahrens301" < tahrens @ swtexas .net> To: Repeater-Builder@ yahoogroups .com Sent: Saturday, August 7, 2010 2:05:09 PM Subject: [Repeater-Builder] AGM Batteries Hi Folks, I got a couple of the large AGM batteries for a solar installation, and was wondering if there is any condition that will lead them to vent inside the enclosure? They are sealed, but probably have one-way valves. Can I put the solar controller in the same enclosure? Figured some of you folks have done solar stuff before. Thanks, Tim
Re: [Repeater-Builder] Re: MSF-5000 information needed
Looking for more information on the "Control Head". I have several CXB's without PA's. I will be using a Micor PA with external circulator. Looking for information on the feed back comming from a MSF PA to the exciter. Ralph - Original Message - From: "wb6dgn" To: Repeater-Builder@yahoogroups.com Sent: Tuesday, July 6, 2010 7:55:02 PM Subject: [Repeater-Builder] Re: MSF-5000 information needed The TPN1186 power supply provides a high current (approx. 36A.), 13.8 volt source and two lower current 13.8 volt sources, fused at 6.3 amps each. There is also decoupling and filtering on a "distribution board" which also provides overvoltage and overcurrent protection. Depending on your "12 volt" source, you may want to find a "parts donor" power supply and adapt that distribution board to suit your needs. The lower power (150 watt and below) stations do not use any supply voltage above that 13.8 volts, however. One thing that you will need, however is what Motorola calls the "Low Power Control Head". This is a rather deceptive name for a rather simple device that senses forward and reflected power and sends that information to the power control circuitry in the RF tray. This information is normally located on one of the RF amps. (I forgot which) but when the PA's are not used, the "control head" performs that function. Schematics of the power supplies and the "control head" should be on Repeater Builder TIP pages or they can be found in most of the MSF service manuals. Good luck, Tom DGN --- In Repeater-Builder@yahoogroups.com , "Robert Pease" wrote: > > I was given an MSF-5000 for VHF, without the power supply or the PA, > just the rf deck and the control deck. > > > > I want to use it for a small on site repeater for linking in an EmCom > vehicle. My understanding is that it will put out about 5 watts without > the PA. Are there any problems with using it this way and what do I need > for DC power, I would love to run it directly off the 12V battery bank > that runs the other equipment. > > > > I haven't even started looking at it, it is in the garage waiting the > time, but with the time approaching I thought I would send our a request > and get some info before I jumped on it. > > > > Thanks - KS4EC - Rob > > > > Robert Pease > > P No trees were killed in the sending of this message. However a large > number of electrons were terribly inconvenienced. > > Think before you print! > > > > > > Since 1974, the award-winning Alpert JFCS has helped families of all faiths > throughout most of Palm Beach County, FL, via counseling, seniors services, > residences for the disabled, mentoring children, support groups and a lot > more. > > SOLUTIONS FOR LIVING > www.JFCSonline.com > > Please take note of our new website and E-Mail Addresses. Please update your > contacts ASAP. > > > > . > > > -- > > > NOTICE: > > This e-mail message and all attachments transmitted with it are intended > solely for the use of the addressee and may contain legally privileged and > confidential information. If the reader of this message is not the intended > recipient, or an employee or agent responsible for delivering this message to > the intended recipient, you are hereby notified that any dissemination, > distribution, copying, or other use of this message or its attachments is > strictly prohibited. If you have received this message in error, please > notify the sender immediately by replying to this message and please delete > it from your computer. >
Re: [Repeater-Builder] Proto boards
Have used these for years. Vero, Vector, GC, Rat Shack,etc. No what I am looking for is small etched boards with one or two transistors 1-2 inch square. and other pads so you can lay out simple circuits. Same for IC's. I found a few surplus here locally and they worked out great. Ralph - Original Message - From: "Jeff DePolo" To: Repeater-Builder@yahoogroups.com Sent: Tuesday, July 6, 2010 2:32:03 PM Subject: RE: [Repeater-Builder] Proto boards Vector Electronics (Google "vectorbord" and "circbord", not typos), GC Electronics, and Radio Shack (if you can find a store still stocking them). --- Jeff WN3A > -Original Message- > From: Repeater-Builder@yahoogroups.com > [mailto: Repeater-Builder@yahoogroups.com ] On Behalf Of Ralph S. Turk > Sent: Tuesday, July 06, 2010 3:17 PM > To: Repeater-Builder > Subject: [Repeater-Builder] Proto boards > > > > Hi All > Looking for small etched, maybe drilled, small boards with layout for > several transistors, resistors etc all isolated pads > > Also looking for ones that have layouts for 8pin, 14 pin or > 16 pin dip with > isolated pads for hook up > > I have some misc of the above and they are great for > inverters, buffers, > little op amps for increasing the level of the disc or tx audio. > > Any ideas? > > Ralph > > > >
[Repeater-Builder] Proto boards
Hi All Looking for small etched, maybe drilled, small boards with layout for several transistors, resistors etc all isolated pads Also looking for ones that have layouts for 8pin, 14 pin or 16 pin dip with isolated pads for hook up I have some misc of the above and they are great for inverters, buffers, little op amps for increasing the level of the disc or tx audio. Any ideas? Ralph
Re: [Repeater-Builder] Copper pipe rather than 2/0 copper wire
Hi All. I used to use 3 1/8 and 1 5/8 copper transmission line in 20 ft lengths for ground systems at broadcast stations. Was very effective. Installed at a 2000ft tower which use to have a lot of damage due to lightning. We buried 40 lengths in a circle about 30 ft from the tower base. Connected them together with additional lengths of transmission line. Problem solved. Ralph, W7HSG - Original Message - From: "Jesse Lloyd" To: Repeater-Builder@yahoogroups.com Sent: Tuesday, March 16, 2010 9:41:43 AM GMT -07:00 US/Canada Mountain Subject: [Repeater-Builder] Copper pipe rather than 2/0 copper wire Hey All, I am thinking about lightening protection for a site and using 1/2 copper pipe runs rather than a heavy guage wire like 2/0. 1/2 copper is about $2.20 a ft, while 2/0 is about $3/foot... and 2/0's diameter is about 0.36 inches so bang for the buck 1/2 copper pipe seems the way to go. I know skin effect plays a big role in lightening since its mainly RF, what do you think about the idea? Cheers, Jesse
Re: [Repeater-Builder] Re: Micor UHF Repeater Base 9.6 vdc current requirement?
Hi all. Built up a copy of the DC supply that was in a old Micor manual. Used the caps and filter choke from an old supply. Add a LM 317 with heat sink. Added MOV's and additional hf caps. Seemed to work fine. This fed a full micor repeater with all the normal modules. Worst case 9.6 volts current was about .75 amps. Have this on a repeater up in Montana. Ralph, W7HSG - Original Message - From: "DCFluX" To: Repeater-Builder@yahoogroups.com Sent: Friday, February 26, 2010 2:59:59 PM GMT -07:00 US/Canada Mountain Subject: Re: [Repeater-Builder] Re: Micor UHF Repeater Base 9.6 vdc current requirement? How about a 7809 regulator IC with a 1N4004 diode in the ground leg to raise the output voltage to 9.6V? > I was envisioning mounting it to something metal for heatsinking purposes, > but I guess you could probably use one of the screws on the backplane plus a > little TO220 heat sink. Whatever works...and doesn't make smoke. > > --- Jeff > > > > > > > > Yahoo! Groups Links > > > >
Re: [Repeater-Builder] Low voltage disconnect in Alberta winters and more
In Montana on top of deep snow mountains, we used thermal-electric generators run from propane. Worked great and was very very safe. Ralph, W7HSG - Original Message - From: "Nate Duehr" To: Repeater-Builder@yahoogroups.com Sent: Friday, February 19, 2010 7:50:13 AM GMT -07:00 US/Canada Mountain Subject: Re: [Repeater-Builder] Low voltage disconnect in Alberta winters and more On Feb 18, 2010, at 10:43 PM, Kris Kirby wrote: > > Generators and fuel are a lot of trouble. > > > (Apparently the snow drifts can get quite bad so we might need to borrow a > > snowmobile for the last > > 400 yards or so.) > > This is when you have to ask yourself: "Is it really worth the hardship > to keep this repeater on the air at this site?" Remember, any drifts that high are also high enough to block off low-level vents, exhaust pipes, etc. A recent (last year) failure of a site generator near here was attributed to the snow piling up so high the generator couldn't get air to run... -- Nate Duehr, WY0X n...@natetech.com facebook.com/denverpilot twitter.com/denverpilot
[Repeater-Builder] HP 8924C
Looking for advise on a HP 8924C What Options needed for normal 2 way work. Who knows who is selling these & reputations etc Any help will be appreciated. Thanks in advance Ralph, W7HSG
[Repeater-Builder] Wattmeter Panel
Hi All Does anyone have the schematic etc for a Circle M TRN 5623 and the 5623A Wattmeter Panel Looked in RB and did not see anything. Ralph, W7HSG
[Repeater-Builder] Micor Repeater
I am building up a Micor repeater using a unified chassis for use in Montana on a Mountain site. Site owner does not want a micor power supply. He has station batteries and charger system. Does anyone have a regulator circuit to make the 9.6 vdc and audio 12 vdc necessary for the unified chassis? I am sure I could design a circuit using a 3 leg adjustable regulator and a pass transistor. Just don't want to reinvent the wheel if I don't need to Ralph, W7HSG
Re: [Repeater-Builder] Noise on UHF
Yes. Point to point works well with 1 watt and 6-8ft some time 10 ft grid dishes over 80 mile paths. So far no problems except for DTV getting into the Mux cards. But thats another story. Ralph - Original Message - From: "Chuck Kelsey" To: Repeater-Builder@yahoogroups.com Sent: Wednesday, June 17, 2009 5:04:36 PM GMT -07:00 U.S. Mountain Time (Arizona) Subject: Re: [Repeater-Builder] Noise on UHF Isn't 2.4 GHz also shared with the federal government? Chuck WB2EDV - Original Message ----- From: Ralph S. Turk To: Repeater-Builder@yahoogroups.com Cc: Repeater-Builder@yahoogroups.com Sent: Wednesday, June 17, 2009 7:16 PM Subject: Re: [Repeater-Builder] Noise on UHF Hi All Just be thankful that the Military is still using 420-450mhz. We share it and if they stop using it, Washington will sell it for something. We get a lot radar and radio location data every day and night. We live with it. Have been moving our links from 420 to 2.4GHz ham band. Ralph, W7HSG
Re: [Repeater-Builder] Noise on UHF
Hi All Just be thankful that the Military is still using 420-450mhz. We share it and if they stop using it, Washington will sell it for something. We get a lot radar and radio location data every day and night. We live with it. Have been moving our links from 420 to 2.4GHz ham band. Ralph, W7HSG - Original Message - From: "AJ" To: Repeater-Builder@yahoogroups.com Sent: Wednesday, June 17, 2009 2:17:29 PM GMT -07:00 U.S. Mountain Time (Arizona) Subject: Re: [Repeater-Builder] Noise on UHF Same question - are you within line of sight of any military installations? We had a lovely buzz saw sound happen about 6 months ago interferring with some sattelite downlink equipment here in the valley and would wipe our UHF repeater up on the hill... It primarily happened between 5 and 10 pm local time... Eventually tracked it down to electronic warfare equipment onboard visiting aircraft at the air force base about 50 miles to the south... As soon as the wargames were over, the interference to both the sattelite downlink (Fox News SD in this case) and the UHF repeaters up on the hill went away. Haven't had an issue since. On Wed, Jun 17, 2009 at 2:47 PM, Adam Feuer < feu...@optonline.net > wrote: Yes, I'm getting it in Rockland County, NY on one of my UHF machines. I'm told that the noise I'm hearing, which I only hear every "blue moon", is some sort of military radar. Adam N2ACF Chuck Kelsey wrote: > Is anyone hearing a strange noise (buzz/whine) on UHF? > > Chuck > WB2EDV > > > > > > > Yahoo! Groups Links > > > > >
Re: [Repeater-Builder] Motorola CDM 1250
I can not find where I set the zone/channels. - Original Message - From: wa...@earthlink.net To: Repeater-Builder@yahoogroups.com Sent: Saturday, May 30, 2009 8:36:37 AM GMT -07:00 U.S. Mountain Time (Arizona) Subject: Re: [Repeater-Builder] Motorola CDM 1250 You have to set your zone first to establish how many channels are in the zone then you can program frrqs for each zone. Sent from my Verizon Wireless BlackBerry >From : "Ralph S. Turk" Date : Sat, 30 May 2009 15:11:05 + (UTC) To : Subject : [Repeater-Builder] Motorola CDM 1250 Good morning All I have several CDM 1250's that need programing. I received every thing with the CDM's. Service manuals Programing Software Programing cable Rib etc The only thing I did not receive was the instructions for using the software. Software fires up fine and I have been able to program 1 channel into a 64 channel radio. I have tried to add other channels to no avail. The information shows up in the tree display and when I tell it to write to the radio, software indicates that it has loaded the channels but the CDM display only shows the first channel. What am I doing wrong? Ralph, W7HSG
Re: [Repeater-Builder] Motorola CDM 1250
Is there a method to clone from one radio to the other? - Original Message - From: wa...@earthlink.net To: Repeater-Builder@yahoogroups.com Sent: Saturday, May 30, 2009 8:36:37 AM GMT -07:00 U.S. Mountain Time (Arizona) Subject: Re: [Repeater-Builder] Motorola CDM 1250 You have to set your zone first to establish how many channels are in the zone then you can program frrqs for each zone. Sent from my Verizon Wireless BlackBerry >From : "Ralph S. Turk" Date : Sat, 30 May 2009 15:11:05 + (UTC) To : Subject : [Repeater-Builder] Motorola CDM 1250 Good morning All I have several CDM 1250's that need programing. I received every thing with the CDM's. Service manuals Programing Software Programing cable Rib etc The only thing I did not receive was the instructions for using the software. Software fires up fine and I have been able to program 1 channel into a 64 channel radio. I have tried to add other channels to no avail. The information shows up in the tree display and when I tell it to write to the radio, software indicates that it has loaded the channels but the CDM display only shows the first channel. What am I doing wrong? Ralph, W7HSG
[Repeater-Builder] Motorola CDM 1250
Good morning All I have several CDM 1250's that need programing. I received every thing with the CDM's. Service manuals Programing Software Programing cable Rib etc The only thing I did not receive was the instructions for using the software. Software fires up fine and I have been able to program 1 channel into a 64 channel radio. I have tried to add other channels to no avail. The information shows up in the tree display and when I tell it to write to the radio, software indicates that it has loaded the channels but the CDM display only shows the first channel. What am I doing wrong? Ralph, W7HSG
[Repeater-Builder] Motorola Rib
I am in need of the pin out connections for the RJ 45 to DB 25 cable used with a Motorola Rib I have searched the RB site but can't seem to find it. Thanks in advance.. Ralph, W7HSG
[Repeater-Builder] OT DTV
Good morning All The following is a new FCC web site for DTV Follow instructions carefully. Wait for the program to calculate info. Seems to be one of the best. Confirms what I know from working in the TV business for 30+ years. Last several installing DTV. http://www.fcc.gov/mb/engineering/maps/ Ralph,W7HSG
Re: [Repeater-Builder] Micor Repeater
I should have added all metal connection with rear mother board. Unified Chassis. Ralph - Original Message - From: "Kevin Custer" To: Repeater-Builder@yahoogroups.com Sent: Monday, February 16, 2009 3:54:41 PM GMT -07:00 U.S. Mountain Time (Arizona) Subject: Re: [Repeater-Builder] Micor Repeater Ralph S. Turk wrote: Kevin Unified Chassis meaning TX on top Control Shelf and Rx etc on bottom. Most chassis' were set-up this way, so please read on - and answer again. A Unified Chassis is a chassis that is not made up of separate rack-mounted units. The Non Unified Chassis is exactly what it says it is. Each of the units (the TX, control shelf, and RX) are separate and connected together electrically with a 50 conductor ribbon cable. The Unified Chassis has a Back-Plane Board that is tall enough to 'reach' the TX and RX compartments, and no ribbon cable exists. The Unified Chassis is easily identified as having "sloping" covers on the TX and RX. Here's a picture of a Unified Chassis: <http://www.kuggie.com/ahra/pix/DSC00027.jpg> Thanks, Kevin
Re: [Repeater-Builder] Micor Repeater
Hi Kevin and all Looks like I found the problems. 1. missing Jumper JU 955 Squelch Pot to Audio/Squelch Board 2. Broken wire on both the Squelch Pot low and Vol Hi. 3. Bad connection Pin 9 that connects to the audio/Squelch Board Took the easy way out and ran a new wire. Thanks for the support and forcing me to turn the unit upside down and backwards etc. Pulling the Receiver interconnect board is a pain but worth it. Where do you pull the disc off for an external Squelch controller and control system I have been using pin 15 of the RX connector on the main board. Ralph - Original Message - From: "Kevin Custer" To: Repeater-Builder@yahoogroups.com Sent: Monday, February 16, 2009 6:05:27 AM GMT -07:00 U.S. Mountain Time (Arizona) Subject: Re: [Repeater-Builder] Micor Repeater Ralph, Okay, I mis-understood. I thought the repeater that you are working on was at your son's place. Let me know when you want to get started and I'll try to walk you through. Oh - one question, is it a Unified or Non Unified Chassis? Kevin Hi Kevin This repeater I am working on is here in Tucson. I will have additional data tomorrow. I will email it to you. I need to make some more tests to understand what I am missing. Thanks Ralph
Re: [Repeater-Builder] Micor Repeater
Neal No, this repeater is going to NW Montana to be connected to our (Cactus Intertie ) system that is linked back to Tucson and then the rest of the system. Where in 2 land are you. I was from NJ 39 years ago. Ralph - Original Message - From: "neal Newman" To: Repeater-Builder@yahoogroups.com Sent: Monday, February 16, 2009 7:43:03 AM GMT -07:00 U.S. Mountain Time (Arizona) Subject: Re: [Repeater-Builder] Micor Repeater Hey Ralph is this Repeater going to be located at Star Pass Resorts? that overlooks the Entire City of Tucson... Nice Place to Vist.. I was out working in Tucson On New years... The Roadrunners are Coolsame for the Humming Birds Neal Ka2caf --- On Sun, 2/15/09, Ralph S. Turk wrote: From: Ralph S. Turk Subject: Re: [Repeater-Builder] Micor Repeater To: Repeater-Builder@yahoogroups.com Date: Sunday, February 15, 2009, 10:36 PM Hi Kevin This repeater I am working on is here in Tucson. I will have additional data tomorrow. I will email it to you. I need to make some more tests to understand what I am missing. Thanks Ralph - Original Message - From: "Kevin Custer" To: Repeater-Builder@yahoogroups.com Sent: Sunday, February 15, 2009 5:11:32 PM GMT -07:00 U.S. Mountain Time (Arizona) Subject: Re: [Repeater-Builder] Micor Repeater Ralph, Sounds good. I'll try to be available when you get the equipment to your son. Kevin Hi Kevin Yes I do. I built one micor repeater with no trouble last summer. Worked like a charm. The only problem it is located in Montana with my son, N7XVF where I can't get to it to make any measurements. My next trip up there I will be leaving him a portable 7604 Tek scope and a scope for his CE-6. Thanks Ralph
Re: [Repeater-Builder] Micor Repeater
Kevin Unified Chassis meaning TX on top Control Shelf and Rx etc on bottom. I pulled the RX interface board and am tracing Pin to pin. Found one jumper missing so far. Ralph - Original Message - From: "Kevin Custer" To: Repeater-Builder@yahoogroups.com Sent: Monday, February 16, 2009 6:05:27 AM GMT -07:00 U.S. Mountain Time (Arizona) Subject: Re: [Repeater-Builder] Micor Repeater Ralph, Okay, I mis-understood. I thought the repeater that you are working on was at your son's place. Let me know when you want to get started and I'll try to walk you through. Oh - one question, is it a Unified or Non Unified Chassis? Kevin Hi Kevin This repeater I am working on is here in Tucson. I will have additional data tomorrow. I will email it to you. I need to make some more tests to understand what I am missing. Thanks Ralph
Re: [Repeater-Builder] Micor Repeater
Hi Kevin This repeater I am working on is here in Tucson. I will have additional data tomorrow. I will email it to you. I need to make some more tests to understand what I am missing. Thanks Ralph - Original Message - From: "Kevin Custer" To: Repeater-Builder@yahoogroups.com Sent: Sunday, February 15, 2009 5:11:32 PM GMT -07:00 U.S. Mountain Time (Arizona) Subject: Re: [Repeater-Builder] Micor Repeater Ralph, Sounds good. I'll try to be available when you get the equipment to your son. Kevin Hi Kevin Yes I do. I built one micor repeater with no trouble last summer. Worked like a charm. The only problem it is located in Montana with my son, N7XVF where I can't get to it to make any measurements. My next trip up there I will be leaving him a portable 7604 Tek scope and a scope for his CE-6. Thanks Ralph
Re: [Repeater-Builder] Micor Repeater
Hi Kevin Yes I do. I built one micor repeater with no trouble last summer. Worked like a charm. The only problem it is located in Montana with my son, N7XVF where I can't get to it to make any measurements. My next trip up there I will be leaving him a portable 7604 Tek scope and a scope for his CE-6. Thanks Ralph - Original Message - From: "Kevin Custer" To: Repeater-Builder@yahoogroups.com Sent: Sunday, February 15, 2009 7:52:44 AM GMT -07:00 U.S. Mountain Time (Arizona) Subject: Re: [Repeater-Builder] Micor Repeater Ralph, Do you have available an oscilloscope? If so, I'll try to walk you through the station an resolve the issue. Kevin Custer Hi all. I am working on a Micor repeater (not Mobile) and I am having problems with the Squelch and Audio circuits. Actual original usage of the Micor repeater is unknown. The repeater will have an external controller. The only module used is the Station Control modified per repeater-builder. Transmitter is all ok. I can not get the Squelch to work with a correctly adjusted/aligned receiver. I also can not get the audio to the speaker with any volume. Very low level. I have both an unmodified audio/Squelch board and a modified (per repeater builder).
Re: [Repeater-Builder] Micor Repeater
Hi all. I am working on a Micor repeater (not Mobile) and I am having problems with the Squelch and Audio circuits. Actual original usage of the Micor repeater is unknown. The repeater will have an external controller. The only module used is the Station Control modified per repeater-builder. Transmitter is all ok. I can not get the Squelch to work with a correctly adjusted/aligned receiver. I also can not get the audio to the speaker with any volume. Very low level. I have both an unmodified audio/Squelch board and a modified (per repeater builder). I suspect I need some jumpers on the Unified Chassis interconnect (mother board) in the RX area but for the life of me, I can't seem to figure it out. I might also have to make some changes on the receiver interconnect board The Unified Chassis interconnect board (mother board) is a TLN 5944A. The receiver interconnect board is a TLN 5646A1 I believe I have the correct schematics for all modules. Any Ideas Thanks Ralph, W7HSG
Re: [Repeater-Builder] Re: Hamtronics Helical Resonator Preamp or Advanced Research Preamp
Most sites will NOT allow RG214 to be used outside. Use 1/2 hard line for runs less than 50-75 ft - Original Message - From: "Jeff DePolo" To: Repeater-Builder@yahoogroups.com Sent: Thursday, February 5, 2009 6:31:22 AM GMT -07:00 U.S. Mountain Time (Arizona) Subject: RE: [Repeater-Builder] Re: Hamtronics Helical Resonator Preamp or Advanced Research Preamp > Again, 20 ft. of 7/8" for 2 meters is an unnecessary expense. > 20 ft. of > RG-214 has only 0.5 dB of loss @ 146 MHz - quite acceptable for a > first-rate system, and it won't cost you that much even if > you have to buy > it @ retail $$. > > Bob NO6B If your repeater cabinet and the antenna are only separated by 20' and you're operating on 2m, there's a very good chance you're going to have other problems... --- Jeff WN3A
Re: [Repeater-Builder] Re: Hamtronics Helical Resonator Preamp or Advanced Research Preamp
I have never seen or used a Hamtronics preamp. I don't know anything about their specs or how truthfull they are. Maybe some one out there in the great bits might have an answer. Skip? Eric? anyone?? - Original Message - From: "Bob Ricci" To: Repeater-Builder@yahoogroups.com Sent: Wednesday, February 4, 2009 7:21:37 PM GMT -07:00 U.S. Mountain Time (Arizona) Subject: [Repeater-Builder] Re: Hamtronics Helical Resonator Preamp or Advanced Research Preamp I do have another bandpass cavity that has 55dB attenuation. Rather than use the 24dB preamp I can always use the one with less gain because I too was concerned with overloading the front-end. The Hamtronics is a preselector helical resonator preamp, so doesn't it already do what the extra cavity does by way of the helical resonator? I'm not stuck on Hamtronics. I just want the best solution. --- In Repeater-Builder@yahoogroups.com , "Ralph S. Turk" wrote: > > Hi Bob > All duplexers have very poor out of band attenuation. The extra cavity is to narrow the bandwidth. > Cavity should have 2-3db of insertion loss (equates to sharp slopes). > Preamp gain is adjusted by use of a step attenuator. Determine how much attn is needed to just raise > the limiter by about 10% max. This way you make up for loss of system plus about 10%. Too much gain will > just lead to overload of the front end of the RX. > Ralph > - Original Message - > From: "Bob Ricci" > To: Repeater-Builder@yahoogroups.com > Sent: Wednesday, February 4, 2009 3:25:14 PM GMT -07:00 U.S. Mountain Time (Arizona) > Subject: [Repeater-Builder] Re: Hamtronics Helical Resonator Preamp or Advanced Research Preamp > > > > > > > The WA-COM 642 duplexer are Bp/Br cavities. The bandwidth is already > limited. Are you saying a 7th cavity adding further loss? And why > limit the gain? I remain teachable. > > "Those that don't know, ask..." > > --- In Repeater-Builder@yahoogroups.com , "Ralph S. Turk" > wrote: > > > > You would still need a pass cavity in front of the Preamp. Unless > the Helical is similar > > to the old Motorola vintage L, H or M receivers the cavity is still > needed to limit the bandwidth > > going to the preamp. You might also need an attenuator after the > preamp to limit the gain. > > Ralph > > - Original Message - > > From: "Bob Ricci " > > To: Repeater-Builder@ yahoogroups .com > > Sent: Wednesday, February 4, 2009 2:08:14 PM GMT -07:00 U.S. > Mountain Time (Arizona) > > Subject: [Repeater-Builder] Hamtronics Helical Resonator Preamp or > Advanced Research Preamp > > > > > > > > > > > > > > Hamtronics has a preamp with a helical resonator with a 18dB > preamp. I > > am at a high elevation with noise all around me. Advanced R3esearch > has > > a 24dB preamp with a low NF and 1dB compression point. Either would > be > > behind a WACOM 642 6 cavity duplxer . > > > > Which would be the better approach? The ultimate goal is to improve > > reception of handhelds in a mountainous region. > > > > > > __ ._,_. __ _ > > Messages in this topic ( 1 ) Reply (via web post) | Start a new > topic > > Messages | Files | Photos | Links | Members > > > > > > > > Yahoo! Groups > > Change settings via the Web (Yahoo! ID required) > > Change settings via email: Switch delivery to Daily Digest | Switch > format to Traditional > > Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe > > > > > > > > Recent Activity > > > > • > > 15 > > New Members > > • > > 1 > > New Links > > • > > 1 > > New Files > > Visit Your Group > > > > > > > > Sell Online > > > > Start selling with > > > > our award-winning > > > > e-commerce tools. > > > > Group Charity > > > > Be the Change > > > > A citizen movement > > > > to change the world > > > > Special K Group > > > > on Yahoo! Groups > > > > Join the challenge > > > > and lose weight. > > . > > > > __ ,_._, __ _ > > >
Re: [Repeater-Builder] Re: Hamtronics Helical Resonator Preamp or Advanced Research Preamp
Hi Bob All duplexers have very poor out of band attenuation. The extra cavity is to narrow the bandwidth. Cavity should have 2-3db of insertion loss (equates to sharp slopes). Preamp gain is adjusted by use of a step attenuator. Determine how much attn is needed to just raise the limiter by about 10% max. This way you make up for loss of system plus about 10%. Too much gain will just lead to overload of the front end of the RX. Ralph - Original Message - From: "Bob Ricci" To: Repeater-Builder@yahoogroups.com Sent: Wednesday, February 4, 2009 3:25:14 PM GMT -07:00 U.S. Mountain Time (Arizona) Subject: [Repeater-Builder] Re: Hamtronics Helical Resonator Preamp or Advanced Research Preamp The WA-COM 642 duplexer are Bp/Br cavities. The bandwidth is already limited. Are you saying a 7th cavity adding further loss? And why limit the gain? I remain teachable. "Those that don't know, ask..." --- In Repeater-Builder@yahoogroups.com , "Ralph S. Turk" wrote: > > You would still need a pass cavity in front of the Preamp. Unless the Helical is similar > to the old Motorola vintage L, H or M receivers the cavity is still needed to limit the bandwidth > going to the preamp. You might also need an attenuator after the preamp to limit the gain. > Ralph > - Original Message - > From: "Bob Ricci " > To: Repeater-Builder@ yahoogroups .com > Sent: Wednesday, February 4, 2009 2:08:14 PM GMT -07:00 U.S. Mountain Time (Arizona) > Subject: [Repeater-Builder] Hamtronics Helical Resonator Preamp or Advanced Research Preamp > > > > > > > Hamtronics has a preamp with a helical resonator with a 18dB preamp. I > am at a high elevation with noise all around me. Advanced R3esearch has > a 24dB preamp with a low NF and 1dB compression point. Either would be > behind a WACOM 642 6 cavity duplxer . > > Which would be the better approach? The ultimate goal is to improve > reception of handhelds in a mountainous region. > > > __ ._,_. __ _ > Messages in this topic ( 1 ) Reply (via web post) | Start a new topic > Messages | Files | Photos | Links | Members > > > > Yahoo! Groups > Change settings via the Web (Yahoo! ID required) > Change settings via email: Switch delivery to Daily Digest | Switch format to Traditional > Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe > > > > Recent Activity > > • > 15 > New Members > • > 1 > New Links > • > 1 > New Files > Visit Your Group > > > > Sell Online > > Start selling with > > our award-winning > > e-commerce tools. > > Group Charity > > Be the Change > > A citizen movement > > to change the world > > Special K Group > > on Yahoo! Groups > > Join the challenge > > and lose weight. > . > > __ ,_._, __ _ >
Re: [Repeater-Builder] Hamtronics Helical Resonator Preamp or Advanced Research Preamp
You would still need a pass cavity in front of the Preamp. Unless the Helical is similar to the old Motorola vintage L, H or M receivers the cavity is still needed to limit the bandwidth going to the preamp. You might also need an attenuator after the preamp to limit the gain. Ralph - Original Message - From: "Bob Ricci " To: Repeater-Builder@ yahoogroups .com Sent: Wednesday, February 4, 2009 2:08:14 PM GMT -07:00 U.S. Mountain Time (Arizona) Subject: [Repeater-Builder] Hamtronics Helical Resonator Preamp or Advanced Research Preamp Hamtronics has a preamp with a helical resonator with a 18dB preamp. I am at a high elevation with noise all around me. Advanced R3esearch has a 24dB preamp with a low NF and 1dB compression point. Either would be behind a WACOM 642 6 cavity duplxer . Which would be the better approach? The ultimate goal is to improve reception of handhelds in a mountainous region. __ ._,_. __ _ Messages in this topic ( 1 ) Reply (via web post) | Start a new topic Messages | Files | Photos | Links | Members Yahoo! Groups Change settings via the Web (Yahoo! ID required) Change settings via email: Switch delivery to Daily Digest | Switch format to Traditional Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe Recent Activity • 15 New Members • 1 New Links • 1 New Files Visit Your Group Sell Online Start selling with our award-winning e-commerce tools. Group Charity Be the Change A citizen movement to change the world Special K Group on Yahoo! Groups Join the challenge and lose weight. . __ ,_._, __ _
[Repeater-Builder] Manual request
Hi all Looking for manuals for 2.4Ghz Lynx-Cp2 Western Muiltplex model 27000-B1 For our group up in Montana. Any help at all would be great. Ralph W7HSG
[Repeater-Builder] Micor Repeater
Hi All. I am working on several Micor repeaters for use in Montana linking back to Tucson via the inter-net. These are standard 75 watt complete Micor stations. My problem is with the built in circulator that is feed by the PA prior to the duplexer. I have tuned the circulator using both a signal generator and spectrum Analyzer and used the tracking generator method. I can not get the loss down below 1 db. Is this normal? Other single stage circulators I have used in the past have had less the 1/2 db loss. Any Ideas. I suspect the harmonic filter is the problem but have not tried to take on apart to see. Ralph, W7HSG
