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Stationmaster type antenna available, 152 MHz., Nashville, TN 9
I have what appears to be a Stationmaster type VHF antenna available. It shows a -20dB return loss at 152 MHz., so it's not cut for the ham band. The return loss at 146 MHz. is only~ -6dB. The extrior of the fiberglass is obvisouly weathered along the entire 23' length but not "feathered". I'd want to apply a new outer coat of protective paint or resin before putting it into service. Other than that, it seems to be in good mechanical condition. I think I have the radials for it somewere in my stash of too much stuff. I don't know if it can be modified for ham radio use or if someone on the list would have a use for it as is. Open to offers; would rather it go to somone who can use it than scrap it for the copper and brass. It's near Nashville, TN. Please email me directly, I don't read the list traffic. I'm good on QRZ. -- Thank you, Robin K4IDC
Started by Robin Midgett @ · Most recent @
R266A -Spectrum analyzer ghosts (internal signals)
Hello members, I have an old R2660A (IDEN option) that I replaced all the 33uf electrolytics caps on Interface board ( each one had leaked). Luckily no major damage that didn't clean up. This fixed the alarming of the "excessive power to internal load alarm". I also replaced the memory battery as well. It goes through all calibrations successfully. Everything seams to be working ok except I'm seeing all kinds of internal signals in spectrum analyzer mode (no antenna connected). It does receive signals normally when connected to an antenna. Does anyone know what might be causing this? More bad electrolytics on another board....or? I pull the spectrum card and receiver card and check the electrolytics on those and they were fine. It what quite a job replacing all those things too i must say... Thanks in advance Randy
Started by r_mankhey@... @
Recording repeater audio 5
Hello all, Has anyone ever setup or thought about setting up a computer to record repeater audio and storing it to a cloud resource, or is anyone else interested in that sort of thing? Mark
Started by Mark Swanson @ · Most recent @
Motorola GM300/Maxtrac rear rx pin not passing audio 7
I will start out by saying this is the second gm300 to do this to me. I use it as a repeater receiver. Does very well for what it is. The unfiltered rx audio from the gm300 feeds a masters SC50 micor squelch/PL board then from there it goes to the rlc controller. The actual receive in the radio still works but that pin on the rear will not pass any audio. When the repeater is keyed it is just a dead key. Can¡¯t give the controller any commands either¡­ when this happened the last time I just put in a new GM 300 and problem was solved. They were each in service about a year and a half before this happened. Has anyone experienced the same issue? I have the previous gm300 here with me, but I have not done any digging to see what has failed. The one that¡¯s on the repeater now is still up there till I can find time to go up there and swap it out with something else or get to the bottom of this.. any help is appreciated.
Started by Tyler- WZ5TX @ · Most recent @
Kenwood TKR-820 UHF 8
Weird one for the experts... I have a TKR-820 that has been running for YEARS. And before I got it, it was running for years!!! After about of month of running (summer/winter no difference), it kicks off. When I reset the power switch, it flashes red briefly and goes out. If I leave it off overnight, I can come back in the morning, turn it on and work for another month... Really???? How does one trouble shoot this???
Started by nh6bf @ · Most recent @
PD526 Duplexer Tuning 40
I have an issue with tuning a duplexer. As you can see from the pictures the high pass looks good but the low pass has a double peak. I am having an issue trying to merge that double peak into one peak. Any suggestions? Do I have an issue with a high side can or do I just need to keep at it? Thanks Robert
Started by Part 15 Engineer @ · Most recent @
19 inch rack mount AC power strip 8
Hi, me again! Lol. Does anyone have a power strip that is 19 inch rackmount with about 8 to 10 outlets which is AC with surge protector? I have one but it came with the rack that I bought in the switch got destroyed so looking to get one to replace it. Don't know what happened to the switch, but it wouldn't even move. Thought there was a cover over the switch is what someone told me, but I got the piece out and ended up being the switch with wires coming out of the back. If no one has one of these AC power strips for a rack, any good recommendations? Chad Nelson WI9HF/WRPL979 Janesville Wisconsin 608-754-8671 Send from my spectrum iPhone 16.
Started by Chad Nelson @ · Most recent @
Help with out of range programming a Motorola GP300 8
I was recently given a pair of GP300 HTs and am trying to get them reprogrammed for some new hams in the area. I have the programmer and RSS and can download the codeplug. But, these are 398-443 MHz RX radios (P94YPC20C1) and won't allow me to put the Amateur repeater frequencies in. I've tried the Shift key trick when entering frequencies to no avail (have used this successfully on Radius and GM300 models). Even tried using a Hex editor and directions I found here to alter the ID bit associated with the model. Neither works. Any thoughts on what to try next? ron
Started by Ron @ · Most recent @
SLR5700 repeater 4
What is the value on the used market for a Motorola SLR5700 repeater removed from a working trunk system in excellent condition? Only reason for change is system does not meet the needs of the user and a system to meet their needs is being installed. Hoping to recover some of their investment. Thank you Roger
Started by n5qs @ · Most recent @
Filter recommendation for DC fan motor interference to echo Link. 11
Hi everyone, I just installed a small DC fan to cool my Link radio and notice when echo Link is active I get a wine on the signal going into the controller for my echo link. Don't get this when repeater is transmiting on its own. Any good filter recommendations to eliminate this out? Chad Nelson WI9HF/WRPL979 Janesville Wisconsin 608-754-8671 Send from my spectrum iPhone 16.
Started by Chad Nelson @ · Most recent @
TKR-850 No Receive 13
Got a TKR-850 that was abandoned at a tower site.. powers on and transmits fine (can transmit using CW ID button and getting 25w output) but receive appears deaf, Busy light is staying on and can't key it up with any amount of power. Tried both ham and GMRS frequencies, both exhibit the same behavior. Checked all the usual settings and can't get it to go away. Any ideas of anything else to check before I say she's dead and just plan on using a mobile for receive? Mike
Started by Mike Sullivan @ · Most recent @
Andrew DB201 Antenna 8
I've been tasked by our Red Cross regional director to get a 47 MHz antenna installed for "low band" VHF use on one of their buildings. It seems to be a difficult band to find commercial antennas for, but the Red Cross is still quite active on the band. I'm looking at the Andrew DB201-L. But everything I find about it is years old and I'm having trouble finding a source to purchase one. Is it still manufactured? And if so, where can I purchase one? If not, is there a newer/better alternative before we just build a ground plane antenna (I'd rather not have to, to be honest). I know this isn't strictly repeater related, but I've found other topics on this specific antenna in this forum (although quite old). Thanks! 73, Marlo KA2IRQ
Started by Marlo Montanaro - KA2IRQ @ · Most recent @
VHF MSR Channel Elements
I know this is a long shot, but does anyone have a pair of channel elements crystalled for 147.180 TX, 147.780 RX for the MSR-2000 they'd like to sell? I thought I'd check here before I order a set from Klove. Thanks in advance. Terry KM5UQ
Started by terry dalpoas @
Astron RM-50M conversion 25
Would like to add the battery backup option to an existing Astron RM-50M. Interested in suggestions on the best way to accomplish this. 73 Martin W2RWJ
Started by M Flynn @ · Most recent @
Motorola SLR5700 DMR Repeater 8
My Motorola SLR5700 repeater goes into transmit every minute and does a 5 second data burst. Here are the settings I have in my repeater, I never recall having this problem in the past. Are my settings wrong? Any help is appreciated. We are on Brandmeister Server Master 3102. The repeater is currently on test bench in a dummy load. Beacon duration 4320, beacon interval 60 Or perhaps there is a different setting I should be paying attention to? Thanks, Joe N4ADI
Started by Joseph Giardina @ · Most recent @
THREAT TO 222-225MHz Spectrum Getting Worse with additional licenses issued outside of California 14
I know I've written about this before but since then the threat has increased to the 222-225MHz Spectrum. The FCC has issued additional licenses to the Company "Chaos" with high powered Radar Testing in the spectrum. The first experiences we had with this was in Hermosa Beach area of Los Angeles County. Now they have new test beds in the following areas: FCC licenses issued to Chaos Industries. Please see the attached documents. WY9XPE - (222-225 MHz) Camp Atterbury, Indiana WY9XYL - (222-225 MHz) MCAS Yuma, Arizona WY9XYM - (222-225) MHz) Irwin National training Center, California WY9XWP - (228-233) MHz Desert Center, Riverside, California Apparently, these are in addition to their existing licenses, These licenses are footnoted that they must cease immediately if they cause interference to Amateur Radio operations. The FCC continues to authorize non amateur radio operations in amateur radio spectrum. If operations are of a temporary, proof-of-concept nature only and in low population areas, perhaps we could just wait. The problem it brings is precedence, which is how many mechanisms of law work. The precedent set giving way to a case being made that they have greater need for the spectrum than we, and an opportunity for the FCC to auction or otherwise reallocate the band. The problem we have, how do we 'defend' against this in these sparse population areas where 220 amateur activity is very low? We can mobilize folks as we have in our local area, but there's a whole interior of the nation where overall use is light. Especially for an off-beaten-path band like 220. This is a strategic threat requiring a strategic response. Remember, these transmitters may not be near you, however if a repeater input can see the transmitter its ability to receive a weak signal is degraded. I urge ALL repeater owners to look at these locations, if in anyway you know repeater owners who may be impacted make them aware of this threat. Today its the 220 MHz spectrum, tomorrow its 1.2GHz, 420-450MHz spectrum or even 144-148MHz, don't think companies like Choas are not thinking of that? Remember, its not a Right, its a Privilege that we can use the spectrum we do and we will have to fight to keep it. Thank you, John N. Hudson III, WA6HYQ President of the 220 Spectrum Management Association President@... iPhone:6192648934
Started by John N. Hudson III @ · Most recent @
Motorola gp340 as echolink node 5
I have a couple of Motorola gp340 laying around and I wanted to make echolink node using rpi 2 and these gp340. After programming ( it was story for another topic) I wanted to connected it with rpi but I cannot find where is the ptt pin on 13 pin connector. Is there someone who can help me with schematic how to connect mic and put. It really poorly informations on the internet... I found that the ptt is supposed to connect ito the pin 5 (option select 2 pin) but voltage on that pin is 3.2V, as on pin 6 (option select 1). Any information would be appreciated. Thank you in advance, Jovan #moto
Started by jodza77@... @ · Most recent @
Difficulty Programming a Maxtrac 300, 32 Channel 14
New to the group and hope you guys can help out in this. I had a real old laptop an Inpiron 3200 that took a crap and it had the RSS software on it. Fortunately, I had made a copy of the RSS on my other computer and I am able to run it in DOSBox but cannot communicate with the rig. The computer I am using only has a USB connector to which I plugged in a USB to serial cable, this went to my RIB box and from there onto the rig. However, communicating with the rig fails. I was wondering if the 300 has a specific Com port and baud rate settings that I could change on this computer to get communication moving along. Thanks, Bill K2WH
Started by Bill @ · Most recent @
Need help on the Quantar test microphone 6
I received an email this morning from a Civil Air Patrol group. They have a Quantar and discovered that the test microphone jack on the front of a Quantar is a 6 pin! RJ11 / RJ-12 / RJ-14 style socket, NOT an 8-pin RJ-45 style. The Quantar (and MSF5000) test microphone is an HMN1001A or HMN1001B, and is a regular mobile microphone except with a 6-pin plug on the end of the curly-cord. Does anyone have the info sheet (even a PDF) that was packed with the HMN1001? Or the part number for the part number for the HMN1001 replacement microphone cord? I called Motorola Parts-ID and WisComm this morning and neither has the info. Does anyone have a contact inside CAP communications??? Maybe they have that info. Thanks in advance. Once I have that part number I'll call Parts-ID and check availability get a price and I'll add both to the Quantar and the MSF pages at repeater-builder. Mike WA6ILQ
Started by M M @ · Most recent @
6 m repeater antenna 40
Begin forwarded message: From: Roger willey <kc4jnn@...> Date: March 26, 2025 at 2:45:40 PM EDT To: [email protected] Subject: 6 m repeater antenna ?I have a 6 m folded dipole antenna, two of them with coaxial lines going to a T what length of cable should I use out of the T to get The impedance and the length? I was thinking maybe 35 Ohm
Started by Roger willey @ · Most recent @
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