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Everything posted by Lscott
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GMRS License - Required to Have On-Person?
Lscott replied to DuneStalker's topic in FCC Rules Discussion
Given the current tools available almost anybody can do a fair job producing a phony document on the computer. Without some other "trusted" method to verify the information you wouldn't know if your own license was fake or not, and neither would anybody else. So the purpose in having a paper copy is to flash it in front of somebody to impressed them enough to go away and stop bugging you. -
Looks like an antique. My concern is the filtering. Likely used some old style electrolytic capacitors which aren’t good anymore. And if they are still “functional“ the ripple maybe too high resulting in a significant level of hum in the audio. I think you would be better off buying a good communication grade power supply that’s well regulated and has proper over load protection built in.
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They might call themselves an organization however they can still be registered as a business for regulatory, tax and liability reasons. I would still recommend you research it bit more if you’re going to file a complaint. Yes the FCC tends to ignore small rule violations. They don’t have the manpower to pursue every rule infraction. Does that make it right? No, but it’s just how things work currently. Of course that can change at anytime if enough licensed GMRS users file a complaint, or the FCC decides to make it a priority. You do need to be sure of your facts before hand.
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Then the next question being is the frequency "grandfathered" by any chance? The local GMRS repeater by me is the "backup" repeater for the city's fire department. I don't think they currently have a license to use it for fire department operations so it's being used by general licensed GMRS operators. But then again I haven't check to see about any old licenses either. In your case if the frequency is in fact grandfathered in it could be, due to some FCC rule, they don't need to ID. This will take more research on your part. I would dig into this a lot more before filing any complaints or calling them.
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From the album: Misc. Radio Gear
This is a Kenwood TK-2170 VHF radio I disassembled. The popular TK-3170/3173's people use for GMRS look exactly the same inside. My everyday carry GMRS radio is the 3170. http://www.swscomm.com/kenwood/TK-2170_3170.pdf There was a flex cable connecting the channel selector and volume/on-off switches to the main board. The trace for the power connection had cracked so the radio wouldn't power on. This radio was a PIA to take apart. You wouldn't believe the pile of screws this thing used. After looking at it and ordering the parts it was a better use of my time to just buy another used one when I found a good deal. This project is packed away for the moment when I get super bored and motivated enough to try and replace the cable and reassemble the radio. Currently I must have 9 of these so I really don't need to rush this any. -
From the album: Misc. Radio Gear
This is a dual band antenna from Comet. Its a ground independent type. That's why I can use the roof rack type mount. It isn't manufacture anymore. That's a shame since it has a very wide band response. I tested it on both the Ham 2M and 70cm bands, good match over the range. The antenna will also work for MURS and GMRS. Update: I sold my Jeep, photo, and replaced it with a 2023 Mazda CX-5 2.5L Turbo Signature model. I had the optional roof rack and rails installed on it. Now I have to mount the antenna system on it at some point and find a good way to route the cable inside. I'll likely buy new rack mount hardware and cable assembly since the old one is weathered fairly well. -
From the album: Misc. Radio Gear
With many of the used radios I've purchased they have come with used battery packs, condition listed as unknown and no guarantees about capacity. Normally I don't consider the inclusion of a used battery pack of much value due to this issue. So before doing anything with a used battery pack I test them, then label the pack with the measured capacity. If they test at 80 percent, or better, I consider them "good" for general use. If the included battery pack tests good then I got a slightly better deal that I had originally thought. Typical no name brand battery packs for my radios run around $20 to $30 new depending on capacity. Most of the used battery packs are the newer Lithium Ion type. I did end up with some used Nickle Metal Hydride and Nickle Cadmium packs. The Ni-CAD packs are about worthless. They suffer from memory effects and get buggered up too easy. If a seller includes a used one it adds zero to the value of the deal IMHO. -
From the album: Misc. Radio Gear
This is a portable mast system for temporary use. The base is a heavy duty speaker stand I got at a flea market. The mast is from MFJ purchased new. The antenna is a telescoping dual band type that doesn't need a ground plane. With some aluminum tent stakes and small diameter nylon rope I can guy this for use in light to moderate wind conditions. In total the antenna is up about 20 feet. That gives an approximate calculated line of sight distance to the horizon of 6.25 miles. The antenna is an AL-800. There are various sources for this antenna all with the same model number but seems to vary in over all length a bit. https://www.dxengineering.com/parts/pry-al-800 -
Doesn’t look much different. Thanks for doing the checks.
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Insertion losses are not the only thing to be concerned with. Did you do a reflection test on those cables? The connectors might be low loss but still cause issues with a crummy match due to the non 50 ohm impedance they have. At one time I looked at the effect of using the commonly seen barrel connectors. People use these for feed through in walls, doors and patching shorter lengths of coax together. This was just a "theoretical" exorcise to see what one might get in practice. UHF Connectors Rev-3.pdf RFU-537.pdf
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You sure they aren’t using plain old FRS radios. Both FRS and GMRS share the same exact frequencies. Difference is FRS is limited to 2 watts on most channels and call signs are not required.
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I’ve sent files at 20, 30 plus MB. Only way was to break it up. Some email systems will reject attachments if they are larger that a few MB. Ran into this for work related stuff. I’ve also locked up the mail server trying to send emails with large file attachments too.
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From the album: Misc. Radio Gear
Boot up custom screen image for some of my radios that support this feature. -
https://www.winzip.com/en/learn/file-formats/rar/ This format is nice since you can break a very large file up into smaller chunks and send them separately. Then the separate chunks can be reassembled back into the original large file.
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That looks good. Myself I've used an old speaker stand with a portable mast from MFJ. I found the stand cheap at a local flea market. The mast I had purchased new. https://mfjenterprises.com/products/mfj-1919?_pos=7&_sid=9c49c76d4&_ss=r https://mfjenterprises.com/products/mfj-1911?_pos=50&_sid=9c49c76d4&_ss=r The top section was way too flexible so i removed it. The antenna on the top is a telescoping dual band design type. https://www.amazon.com/AL-800-HighGain-Extendable-Antenna-SMA-Female/dp/B015ILL6ZS Between the two the antenna is up about 20 feet. Using some aluminum tent stakes and nylon rope I can guy it for light to moderate wind gusts.
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From the album: Misc. Radio Gear
This is a very unusual radio. It appears to be a predecessor to their new NX-5000 series radios. It does FM, wide and narrow band, along with DMR. The radios include Kenwood's basic 15 bit scrambler option for DMR. Higher encryption options don't appear to be available. The radios are sold, or were, in Europe, not in the US. Note these radios do not have an FCC ID. They were never intended to be sold in North America. I was lucky enough to win a few eBay auctions to get them. The radio on the left is the UHF version programed for various services and shown monitoring the local GMRS repeater. The radio on the right is the VHF version also programmed for various services and shown monitoring the local NOAA weather channel. The detail specs are here: https://www.kenwood.eu/files/file/comms/uk/brochures/nx/TK-D200_D300_V4.1.pdf If you ever do get one of these radios you'll need a copy of Kenwood's KPG-166D to program them. I recently found an electronics shop in the Netherlands that had these for sale, new, and best of all they ship to the USA. Most places either shows it as discontinued and or don't ship to the USA. I ordered one radio, core and belt clip only. This gives me a spare UHF model. I just recently purchased a clean, almost new condition VHF version, TK-D200E, from a seller in the US of this radio with display and full keypad on a well known auction site. Now I have at least one of each model type in my collection. A TK-D200GE version appeared for sale, from a seller in the UK, on my favorite auction site. Again the radio was in like new condition. This is the GPS enabled version of the VHF model. I won the auction and got the radio for a good price, cheaper than the first VHF one I got. The model(s) I have only one currently includes the GPS RX in them. You need a special antenna for the radio for the GPS to work. Since people have GPS included with other devices having it in the radio isn't that useful, but sort of cool to have it. The GPS data is not sent like Ham APRS. You need special software on the RX'ing radio to make use of location data sent anyway. https://comms.kenwood.com/common/pdf/download/KAS-20_Specsheet_letter.pdf -
Don't Automatically Assume It's Cheap Chinese Electronics
Lscott replied to marcspaz's topic in Miscellaneous Topics
That's why I pay a bit extra for insurance for anything I ship out. I had some NX-300 radios a seller let me keep after getting a full refund on the price and shipping. It wasn't worth the hassle according to the seller to ship them from Detroit back to the Vancouver Canada area. The power output was WAY low so the power amp stage was shot. The seller didn't realize that and sold them as fully functional. Being the Intrinsically Safe models I couldn't just send them anywhere, had to go to a place in New York certified by Kenwood to work on them. I shipped them to the repair depot and insured each one for at least $200. If the USPS f'd up and lost or damaged them I would still make a few bucks off their screw up. -
Don't Automatically Assume It's Cheap Chinese Electronics
Lscott replied to marcspaz's topic in Miscellaneous Topics
That's why I have anything of value that won't fit in the home mailbox delivered to my work address. Our receiving department has to sign or anything other than USPS. The later gets delivered to the front reception area and left by my mail slot if it doesn't fit in it. You get antsy when buying stuff for a few hundred bucks and wonder how long it's been sitting in plain view for the porch pirates to see it. Then there is the weather. Rains all day so when you get home that box is now a lump of brown mush with you stuff inside somewhere. -
$$$$$$$$$$$$$$$$$$
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Digital Voice Mode on GMRS - Possible Rules?
Lscott replied to Lscott's topic in FCC Rules Discussion
Some said the same thing with FM on 11M CB. Well it happened. I think it all depends on how it's proposed to the FCC. If it's too disruptive or requires the FCC to make major significant changes to the rules it likely won't happen. I did post, 7/25, in this thread a while back some ideas on how it could be done, in a downloadable file (GMRS Digital Voice - 20220803.pdf) since it's rather long, what the FCC is likely to consider. -
Garmin went and made murs spendy,,but pretty cool maybe
Lscott replied to Craws907's topic in Multi-Use Radio Service (MURS)
There aren't many radios specifically manufactured for MURS. There are some nice used Part 90 radios that will work just fine with the "proper" programming. If the radio was certified before 2002 I believe it can be used, grandfathered, so long as all of the technical requirements are met, power, frequency and bandwidth. I think radios like the following qualify. TK-270G, FCC ID ALH29463110, Grant 1999 https://www.manasrekha.com/pdf/TK-270G-370G.pdf TK-2140, FCC ID ALH32253110, Grant 2001 http://www.swscomm.com/kenwood/TK-2140_3140.pdf Unfortunately the radios are only switchable between 5W and 1W so to be strictly legal the power would have to be set at 1 watt. It might be possible to adjust them to 2 watts on the low setting. Oh, these radios make nice 2M radios once programmed for local repeaters too. -
One of my TK-5320 UHF P25 radios. Uses the same case style as the NX-200/300 NXDN radios. Makes them hard to tell apart without looking at the model tags on the back side. I also have the VHF version too. The 450 MHz to 520 MHz band split models have Part 95 certification so they can be used on GMRS FM mode only. Detailed spec's: https://comms.kenwood.com/common/pdf/download/TK-5220_5320_Specsheet.pdf
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From the album: Misc. Radio Gear
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From the album: Misc. Radio Gear