[Repeater-Builder] OT: Mic cable
Does any one know where I can obtain a 6 foot coiled cord 8 conductor (7 leads + shield) mic cable? Thanks Bernie Parker K5BP
[Repeater-Builder] Re: tm271 as repeater
If you install the packet connector mod for the TM 271 you can get COR that way. Google that or the mods dk site probably has the packet mod listed. 73 Bernie Parker K5BP --- In Repeater-Builder@yahoogroups.com, olan_784 olan_...@... wrote: need help! trying to build a repeater using 2 kenwood tm271, cant seem to locate a cos signal from the tm271, does somebody have an info or idea? or do i need to build a cos detector? --- In Repeater-Builder@yahoogroups.com, olan_784 olan_...@... wrote: need help! trying to build a repeater using 2 kenwood tm271, cant seem to locate a cos signal from the tm271, does somebody have an info or idea? or do i need to build a cos detector?
[Repeater-Builder] Bad Isolator
Is there any conceivable way a a bad isolator on an old 440 mhz DB Intermod Panel can cause RX problems that appear similar to desense? Thanks Bernie Parker K5BP
[Repeater-Builder] OT: IFR MM-100E
Does any one have the manual for an IFR MM-100E. It is the accessory option found in the lid of either an FM/AM 1000 or FM/AM 1100S communications monitor. It is a cheap and dirty SINAD/Voltmeter. All I need actually is the value of R50. Thanks Bernie Parker K5BP
[Repeater-Builder] Re: PL (CTCSS) Filter
Hi Doug, Many years ago I had a similar situation. Instead of using the N06B filter I used the built in hi-pass filter in a Comm Spec PL encoder/decoder board. It is very similar to the NO6B filter. What was happening was that the filter was introducing twist (subtle distortion) to the DTMF waveform. The solution was to connect the DTMF decoder directly to the discrimnator output bypassing the filter. You could then try put the filter in line the transmit audio from the controller. However this could be opening up another can of worms because I don't know if you are running flat or pre-emphasized audio and what the effect would be. 73 Bernie Parker K5BP --- In Repeater-Builder@yahoogroups.com, Doug Hutchison gb...@... wrote: Hi, Have built the filter circuit by Bob Dengler NO6B from the site. The unit works a treat but for some reason, DTMF detection fails on my 210 controller with the filter in use. DTMF is present on the output. Any suggestions re what might be causing this would be appreciated. Thank you, Doug - GM7SVK
[Repeater-Builder] Re: Repeater Kerchunk
It would help to know more specific hardware details, specially what controller you are running. Many controllers have an anti kerchunk option built in. 73 Bernie Parker K5BP -- In Repeater-Builder@yahoogroups.com, retiredcss01 tommy...@... wrote: We have some on our repeater frequency, that just like to kerchunk the repeater to hear it come back or ID. Is there any way we can eliminate this annoying situation? I suspect that we may have an unlicensed individual with a 2meter radio. Thanks
[Repeater-Builder] OT Fish paper
Does anybody know of a good source for fish paper insulating material? I trying to find it available in small quantities. 73 Bernie Parker K5BP
[Repeater-Builder] Re: OT Fish paper
FWIW I use Pliobond contact cement to glue the fish paper. Pliobond has to be thinned with MEK, so I know its strong... 73 Bernie Parker K5BP --- In Repeater-Builder@yahoogroups.com, Eric Lemmon wb6...@... wrote: Bernie, Scotch (3M) makes 2520 Adhesive-Backed Varnished Cambric tape in various widths, and you can purchase single rolls from industrial suppliers such as McMaster-Carr and Grainger. This stuff is much better than fish paper, both for its insulating value and its mechanical strength. You will not find this product at Home Depot or Lowes, because it has specialized uses within the electrical power industry. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of dallasreact112 Sent: Thursday, March 05, 2009 2:29 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] OT Fish paper Does anybody know of a good source for fish paper insulating material? I trying to find it available in small quantities. 73 Bernie Parker K5BP
[Repeater-Builder] Complex Skywarn Paging System
I am just curious if any other amateur 2 meter repeater has a more complex RACES Skywarn paging system than the 146.88 W5FC Dallas TX repeater? The normal daytime amateur state of the repeater is 110.9 Hz full PL. To go into RACES Skywarn mode the following sequence occurs: 1. Repeater Mode changes: a. PL changes to 114.8 Hz b. RX squelch changes to OR mode squelch. Carrier squelch OR 114.8 Hz PL encode opens repeater. OR squelch allows the carrier squelch threshold to be set higher than PL squelch threshold. 2. RACES Tones out: a. 30 second DTMF A tone b. Motorola 2 tone sequential pager tones group 1 c. Motorola 2 tone sequential pager tones group 2 d. DTMF 0 sent three times in quick succession to activate the old Kenwood DTMF paging decoders available in their older units. I would love to hear from anyone that has a more complex paging routine. 73 Bernie Parker K5BP Dallas Amateur Radio Club Tech Officer
[Repeater-Builder] OT: Chicken Stick
Does any one know where I can obtain a fiberglass chicken stick? I had one at Collins Radio that was about a foot long, 1/4 inch in diameter and would like to obtain the same. It is sure a lot safer probing around the anode of a Klystron with a chicken stick than a metal screwdriver. 73 and TNX Bernie Parker K5BP
[Repeater-Builder] Re: Desense has me pulling my hair out! (Was DB4060 Duplexer Cables
Take a look here: http://www.repeater-builder.com/db/db-4060-4062-repair.pdf 73 Bernie K5BP --- In Repeater-Builder@yahoogroups.com, Ralph Hogan [EMAIL PROTECTED] wrote: While we are on the subject of the DB4060/62, I've got a couple of dead cans with a bad tuning cap. Does anyone have a source I can call to buy some of the Johanson 5602 tuning caps? Some of the Johanson distributors don't stock it and require a big min order. I've looked at Nebraska Surplus and they have some that might work, but I'd like to find the exact replacement if possible. Thanks, Ralph W4XE
[Repeater-Builder] Re: db 4060 high band
Hi Joel, Take a look at this page. http://www.repeater-builder.com/db/db-4060-4062-repair.pdf You have the classic symptom Bernie Parker K5BP --- In Repeater-Builder@yahoogroups.com, Joel Hall [EMAIL PROTECTED] wrote: Hope some of you guys that have some experince with db 4060 duplexer,the pass is fine but the notch is the problem I can see the notch at around 35db on my ifr 1600s per each can but when i combine them together about 50db is the best i can get I have new cables made 1/4 wave long , the tuning caps seem a little flakey may have had been hit with a lightning surge. I have not taken them apart yet so any thoughts? Thanks kj4si
[Repeater-Builder] Re: db products 4060
Hi Aaron, You may wish to look at this article on the repeater builder site. It explains a common problem you may be having. http://www.repeater-builder.com/db/db-4060-4062-repair.pdf 73 Bernie Parker K5BP --- In Repeater-Builder@yahoogroups.com, Aaron Sloan [EMAIL PROTECTED] wrote: Hello gang, I am wondering what the opinion is of the decibel products db4060 duplexers for 2m service. We have a set that are nearing 30yrs old and looking for a replacement. The current model never really preformed as well as the specs. Is this an experience shared by anyone else? Thanks, Aaron ka0zoz
[Repeater-Builder] Re: IFR A-7550 spectrum analyzer, power supply problem
Hi Joe, First pray there is not a bad load or short causing power supply shutdown. Most likely it is the electrolytics in the power supply going bad. These IFR's are getting old enough where that can be a problem. 73 Bernie Parker K5BP --- In Repeater-Builder@yahoogroups.com, Joe [EMAIL PROTECTED] wrote: Hello to all, I recently acquired an IFR A-7550 and started to test it out this afternoon. I removed the battery from the unit because it was dead and I didn't want to damage the power supply. I plugged it in and heard a squealing noise for a second or two before the fuse blew. Any words of advice before I start digging into the power supply of this beast? 73, Joe, K1ike
[Repeater-Builder] Re: Need some help
Sounds Like a flip flop R S latch circuit to me. Google that and you will find something. A 7400 IC could do the latch part. Not knowing voltage and current requirements I really can't go into more detail. 73 Bernie Parker K5BP --- In Repeater-Builder@yahoogroups.com, Rich Summers [EMAIL PROTECTED] wrote: I need to build a simple circuit to enable a voice scrambler in a radio. What I need is a momentary contact by pressing a button so that the activation lead goes to ground and when this happens I need an led indication that the unit has been activated. I also need the led to turn off when the button is pressed again. This deactivates the board and the radio returns to normal mode. I need this in a small box. Does anyone have a circuit I could build for this particular application? Thanks, Rich
[Repeater-Builder] Heliax Testing and Megger
I have access to a spare run of about 150' 1-1/2 heliax at a repeater site. It goes from the Radio Room to the roof. There is no antenna connected to it. I would like to verify if it still any good. Obviously, hooking it up to a TDR would be a preferred method of verification. Next best method probably would be hooking it to a transmitter with a Bird thruline at the transmitter and a Bird termaline at the end on the roof. I could then verify SWR and verify actual transmit loss. Lacking that, I wonder if a megger, which I do have, might be of use? If I were to suspect if the heliax is bad due to moisture incursion, one might be able to see a low resistance path between the center conductor and outer shielding. Has anyone tried this? Is there a spec, or reasonable approximation for insulation resistance center to shield per 100 ft or the like? 73 and Thanks Bernie Parker K5BP
[Repeater-Builder] Re: Yaesu FT-2800 Interface
Hi, Squelched discriminator is a paradox of terms! Most of the time the squelch function is derived from the noise seen at the discriminator. I suspect you really mean either filtered (deemphasized) or unfiltered gated audio and/or COS. On a Kenwood redio I had a similar requirement. I used the NHRC squelch board: http://www.nhrc.net/nhrc-squelch/ I tapped into raw discrimator audio from the Kenwood and with this board and was able to generate squelch logic that can generate either COS or use the logic to gate audio. Am I to assume you are trying to use this 2800 as a remote base? Is that correct? If so all you really need is COS, PL squelch (if desired) and either discrimator audio or deemphasized audio (line audio) to go into the controller. Normally, if you use COS input to a repeater controller you do not need to gate the RX audio. Some times this can end up being an art. More specific information is needed for your application and and I am sure some body can help... 73 Bernie Parker K5BP DARC Tech Officer --- In Repeater-Builder@yahoogroups.com, wb7cjq [EMAIL PROTECTED] wrote: Does anybody know where to pick-off the squelched discriminator audio, the line level audio input and the COS signals ??? The schematic shows J309 that appears to have some of this stuff, but the connector is itty-bitty - I can't find a mating connector anywhere !!! I opened the radio this morning and just went sigh... MilSpec, and I'm not very interested in completely tearing the radio apart to get to needed signals. I suspect that most (if not all) of them are on the PCB that you see when you pull the lid. I went in with a tiny multimeter probe and touched a pin going to the front panel (in search of the COS - AKA Busy line) and mnaged to touch two tiny pins at the sametime. POOF! No more radio. Thank God for warranties. My 60 year old 'fat fingers' are too 'fat' for this micro type work, and I'm a skinny guy! Hope somebody has already chased these signals and can post the info. !!! Thanks, Dave WB7CJQ
[Repeater-Builder] Re: Yaesu FT-2800 Interface
Ok Dave, I'm still stumped a bit why you need gated audio. Is there not a controller? In other words, does this cross band link stay keyed all the time? 73 Bernie Parker K5BP DARC Tech Officer --- In Repeater-Builder@yahoogroups.com, wb7cjq [EMAIL PROTECTED] wrote: --- In Repeater-Builder@yahoogroups.com, dallasreact112 dallasreact112@ wrote: Hi, Squelched discriminator is a paradox of terms! Most of the time the squelch function is derived from the noise seen at the discriminator. I suspect you really mean either filtered (deemphasized) or unfiltered gated audio and/or COS. On a Kenwood redio I had a similar requirement. I used the NHRC squelch board: http://www.nhrc.net/nhrc-squelch/ I tapped into raw discrimator audio from the Kenwood and with this board and was able to generate squelch logic that can generate either COS or use the logic to gate audio. Am I to assume you are trying to use this 2800 as a remote base? Is that correct? If so all you really need is COS, PL squelch (if desired) and either discrimator audio or deemphasized audio (line audio) to go into the controller. Normally, if you use COS input to a repeater controller you do not need to gate the RX audio. Some times this can end up being an art. More specific information is needed for your application and and I am sure some body can help... 73 Bernie Parker K5BP DARC Tech Officer --- In Repeater-Builder@yahoogroups.com, wb7cjq wb7cjq@ wrote: Does anybody know where to pick-off the squelched discriminator audio, the line level audio input and the COS signals ??? The schematic shows J309 that appears to have some of this stuff, but the connector is itty-bitty - I can't find a mating connector anywhere !!! I opened the radio this morning and just went sigh... MilSpec, and I'm not very interested in completely tearing the radio apart to get to needed signals. I suspect that most (if not all) of them are on the PCB that you see when you pull the lid. I went in with a tiny multimeter probe and touched a pin going to the front panel (in search of the COS - AKA Busy line) and mnaged to touch two tiny pins at the sametime. POOF! No more radio. Thank God for warranties. My 60 year old 'fat fingers' are too 'fat' for this micro type work, and I'm a skinny guy! Hope somebody has already chased these signals and can post the info. !!! Thanks, Dave WB7CJQ Hi Bernie! Yeah, bad choice of words. What I really meant was gated discriminator audio so that I don't have to build up a transistor switch to mute the audio upon loss oc signal. I had to do that years ago with an old Standard that I built into a repeater. UGH... Anyway, I see a 2SJ144 hanging between the volume pot and the audio amp., one side tied to ground. I'll bet this is the guy I'm after, but I can't get at it! Too tiny for me !!! Yes, this package is essentially a remote base, crossbanding between 2 meters and 440MHz. Thanks for the reply and the info.! Dave.
[Repeater-Builder] Stupid Question about Db antennas.
I have a question about the DB base antennas such as the DB-224, DB- 420, etc. As most of you know they consist of folded dipole trombones mounted on the mast at 90 degree angles with a phasing harness to create a omnidirectional pattern. I have heard of pointing the trombones all in one direction to create a beam. My question is has anyone pointed them in other directions? What I'd like to do is point mine in roughly 120 degree slots, to go around downtown bulidings which block the RF path due north, SW and E as we are located on a 40 story builing in the middle of downtown which has taller buildings blocking the aforementioned directions. Essentially what I want to do is beam the signal in to the open slots. 73 and Thanks, Bernie Parker K5BP
[Repeater-Builder] Re: TKR-750 New PA Schematic
Hi Gareth, Try Here http://www.repeater-builder.com/kenwood/tkr-750k-svc-man.pdf 73 Bernie Parker K5BP --- In Repeater-Builder@yahoogroups.com, Gareth Bennett [EMAIL PROTECTED] wrote: 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 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.
[Repeater-Builder] Re: KENWOOD TKR 750 Installation and problems-HELP!!
Hi Paul, Might the missing step be the db adjacent channel selectivity spec of the repeater receiver itself? Bernie Parker K5BP --- In Repeater-Builder@yahoogroups.com, Paul Plack [EMAIL PROTECTED] wrote: Can anyone direct me to a good tutorial on how to calculate required isolation in a duplexer or separate-antenna setup? I can convert receiver sensitivity in uV and transmitter power in watts to dBm, and insert things like transmitter sideband noise specs, but I keep coming up with numbers like 150 dB to avoid desense. Since my last UHF repeater worked great with 96 dB isolation thru the duplexer, I know I'm missing a step somewhere. Thanks! - 73, Paul AE4KR
RE: [Repeater-Builder] Re: Duplexers
Holy Cow!! Get out your Smith charts!:-) Thanks for the answers. Be careful what you ask for... Thanks to Kevin at Repeater Builder as well. IMHO still the best repeater info site. 73 Bernie Parker K5BP
[Repeater-Builder] Duplexers
Anyone one know what to expect SWR wise with a duplexer? I have a DB products 2 meter duplexer on an amateur repeater. Measuring with a Bird wattmeter between the duplexer and antenna I read 50W forward and a couple watts reverse. That is ok. But when I check between the transmitter and the TX port on the duplexer I get a about 60 W forward and 25W reverse power. Is there a rule fo thumb for a known good SWR value thru a duplexer? Should a good duplexer introduce any significant SWR? Thanks Bernie Parker K5BP
[Repeater-Builder] Re: Decibel DB-480
Rats! I was hoping it was 900 mhz Tnx and 73 Bernie --- In Repeater-Builder@yahoogroups.com, Ron Wright [EMAIL PROTECTED] wrote: Bernie, The DB-480 is a DB Products 806-870 MHz, 7.5 dBd Gain vertical antenna. It covers the entire range of 806-870. It is a center-fed collinear array and has a strip transmission line printed circuit harness as the phasing harness. 73, ron, n9ee/r From: dallasreact112 [EMAIL PROTECTED] Date: 2007/08/06 Mon PM 10:38:06 CDT To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Decibel DB-480 Anyone know what band antenna this is? It is approximately 8-10 ft long with a fiberglass radome about 4-6 in diameter. 73 Bernie Parker K5BP Ron Wright, N9EE 727-376-6575 MICRO COMPUTER CONCEPTS Owner 146.64 repeater Tampa Bay, FL No tone, all are welcome.
[Repeater-Builder] Decibel DB-480
Anyone know what band antenna this is? It is approximately 8-10 ft long with a fiberglass radome about 4-6 in diameter. 73 Bernie Parker K5BP
[Repeater-Builder] Re: Does anyone have wiring details for a DTMF decoder
--- In Repeater-Builder@yahoogroups.com, Ted W. Horn [EMAIL PROTECTED] wrote: Does anyone have a schematic showing wiring information for a simple DTMF decoder? I have been searching the internet and have not been able to find anything. I have a SSI202P, but NO wiring information. Ted KA3CEU [EMAIL PROTECTED] Hi Ted, Try this link... http://www.nadtec.to/pub/ham-radio/dtmf-rs232-converter.pdf 73 Bernie K5BP
[Repeater-Builder] Intermod
Every once in a while we get FM broadcast interference on our DCR 442.425 uhf repeater here in Dallas Texas. It apparently bothers other 440 ham repeaters in the area as well. Seeing how the broadcast FM is 250mhz+ away from our input, and a DCI bandpass filter is inline with our rx, could this be the famous rusty bolt as a mixer intermod problem? Any input is appreciated. Thanks Bernie Parker K5BP Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Re: tkr repeater encode function.
Hi, This may not be the exact answer. I know this is a kludge, but here's what I am having to do. Assuming that you are using one frequency pair on a TK 750,850 series...The repeater has 16 ch capability. Just program all the channels to the same frequency pair but different tones. Then by grounding the appropriate external aux I/O port select your channel (tone). You have to set this up with the Kenwood programming software. One caveat though, in repeat mode if you are doing this with an external controller as soon as the repeater receives the logic from the controller to the AUX I/O port it will drop xmit immediately. Thus you have no feedback, until you rekey and note the different tone being transmitted. I am engineering a 16F84A pic based circuit board to delay this logic by 2 secs and send a separate PTT command to the RC-210 controller I am using. This makes the tone change appear to be normal like the old ACC RC850 controller could do to its own Icom link xcvrs. As much trouble as it sounds, it still beats tearing into a new perfectly good repeater to install a tone board. There is still yet another option, and that is to use the multitable tone option. Then the tone out is controlled by a psuedo BCD code applied to the external AUX I/O ports. This is again enabled by the Kenwood programming software. I haven't tried to see if this drops the xmitr though. Alas this could easily be done with the on board firmware if Kenwood wanted to. 73 Bernie Parker K5BP Dallas Amateur Radio Club --- In Repeater-Builder@yahoogroups.com, Ken Arck [EMAIL PROTECTED] wrote: At 08:10 PM 1/12/2006 -0500, you wrote: well I got a tkr-850 with the 210 and it has been working with no problems. love it it is real nice. also in the service book from Kenwood they show the hook up of a Zetron 38 tome panel to the 850 and it used the tone panel for encode and decode. The specific question iscan you control the encoded tone while the transmitter is active? And by using the TKR's built-in tone encoder. In other words, if you have a hangtime of, let's say...5 seconds, can you kill encoded tone half way through the hangtime? Ken -- President and CTO - Arcom Communications Makers of state-of-the-art repeater controllers and accessories. http://www.ah6le.net/arcom/index.html We offer complete Factory Authorized Kenwood TKR repeater packages! We are now an authorized Telewave Dealer! AH6LE/R - IRLP Node 3000 http://www.irlp.net Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Two Tone Sequential Paging
Hi, Does anybody in group know the frequncy tolerance of generated audio tones used in two tone sequential paging? I know one can get away with +/- 1hz on PL encoding and it will generally still work. 73 Bernie Parker K5BP Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Micor VHF HI Receiver Spec?
Hi, I am pondering replacing a Micor (146 mhz} ham repeater with a more current model. As many already know the receiver in the Micor is excellent. Could some one dust off a Micor maintenance manual and get the receiver specs for me. For that matter does anyone have experience or know of current repeater receivers that match or exceed the Micor specs? Thanks Bernie Parker K5BP 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/
