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  • Redbicycle's Avatar
    Today, 10:14
    Redbicycle replied to a thread New Member in Introduce yourself
    Welcome! Sent from my iPhone using Tapatalk
    1 replies | 35 view(s)
  • Joedub1421's Avatar
    Today, 04:14
    Hope everyone is doing well tonight. Haven't been punched yet but looking forward to being part of a good community. Joe W
    1 replies | 35 view(s)
  • WaveyDipole's Avatar
    Yesterday, 08:29
    That's what I figure is going on here. I have been advised that they are investigating but it has now been a couple of weeks since the initial response to the ticket that I opened.
    6 replies | 285 view(s)
  • trooper's Avatar
    Yesterday, 02:31
    Brandon Just a note, I changed the PA because someone suggested that it could be the problem but things didn't change. I'm going to do some more testing as you suggested and I think I will change the coax also. Ken
    10 replies | 463 view(s)
  • K7KBN's Avatar
    Yesterday, 01:46
    K7KBN replied to a thread electrical problem in Mobile Operating
    SWR (where the R stands for "Ratio") is independent of power being transmitted. I agree with Brandon: replace the RG-58 with RG-213. It's larger in diameter, made to military specs, and it should do you a lot better. Just watch the bending radii when installing it. RG-8X might work also; it's just slightly larger than the -58 (same size as RG-59, the older 75 ohm cable TV coax). However, the smaller the cable the higher the losses.
    10 replies | 463 view(s)
  • brandon lind's Avatar
    Yesterday, 00:49
    The way to measure the voltage when keyed is to somehow find or otherwise expose a small amount of wire near the radio to connect the meter to. Does the voltage converter have a power rating marked on it? As for the heat sync material... Its super bad practice to reuse existing heat sync compound due to the high probability of air bubbles being trapped between the module and heat sync when the new module is put in place. I only know this because I nearly fried a very expensive 8 core CPU doing that. Fresh (and much softer) heat sync goo is usually applied as a small but thick spot in the center so that the part pressing down spreads it and eliminates the possibility of trapped air. Next time, clean everything completely and start fresh. Rant complete :) Increasing SWR with power is a sign of something horribly wrong. Under proper conditions, that does not happen. So many things could be going on, I will list a few. See if anything stands out. -Is the antenna mounted along side anything conductive? Is...
    10 replies | 463 view(s)
  • trooper's Avatar
    Wed 22nd May 2019, 21:53
    Hello everyone, lots of questions to answer, I will do my best. The radio is mounted in my military Humvee which is 24 volts and I have a 12 volt converter just for the radio and it reads 12 volts at the radio. The radio power wiring is factory and looks like 12 or 14 gage about 6 feet long. The antenna is a 2 meter firestix using about 16 feet of RG58 with no markings. My watt/SWR meter is a MFGJ812B. I was wrong on the SWR It was not adjusted properly. Anyway the three settings and there power and SWR are as follows: Setting low Mid High Should be 10 25 50 Watts 3 10 23 SWR 1.3 1.9 2.9 I can see that the SWR is not good at the higher settings.
    10 replies | 463 view(s)
  • brandon lind's Avatar
    Wed 22nd May 2019, 16:33
    Tell us about the antenna, mount and mounting location as well.
    10 replies | 463 view(s)
  • brandon lind's Avatar
    Wed 22nd May 2019, 16:29
    First, I'm shocked. The Mitsubishi M67781L final is rated for 40 watt. 50 watt is the absolute maximum rating. Yet, the yaesu technical supplement clearly states it runs at 50 watts. I cannot believe they would design a radio to run a device at its absolute maximum rating. Must be a rugged part... You say you replaced the power amplifier. So you tore the radio apart and swapped the M67781L final module? Being yaesu decided to push that device to its limits, I sure hope you used good heat sync compound! Break it down for us in detail. Tell us what gauge wire you used to power it, how long that wiring is, and what you connected it to. A 50w radio isn't going to work right on a cigarette lighter circuit! Does the display dim when you key up? Can you check the voltage while you key up to ensure it isn't dropping? Next, tell us what kind of coax you are using (should be printed on the side and likely hard to see), how long that is, and if the cable itself without the antenna passes a continuity test....
    10 replies | 463 view(s)
  • Awgydawg's Avatar
    Wed 22nd May 2019, 15:28
    I have an FT-65E handheld with the rapid charger SBH 22, the unit slots in or you can charge a battery on its own. I am now looking to buy an FT-70DE, but this comes with a slow charger that plugs into the side of transceiver. The rapid charger SBH 28 for the 70DE looks the same and has the same output (SBH 22 8.4V 800mA - SBH 28 8.4V 900mA). The slight difference in output current won't matter but are the terminals and slot sizes the same? Thanks in advance if anyone knows.
    0 replies | 48 view(s)
  • 5B4AJB's Avatar
    Wed 22nd May 2019, 06:27
    5B4AJB replied to a thread electrical problem in Mobile Operating
    Sounds like the coax is damaged, you have a braid shorting at the far end, or the D.C. cabling isn't man enough. Please tell me you wired it through fuses directly to the battery... Either that or it's a setting somewhere?
    10 replies | 463 view(s)
  • trooper's Avatar
    Wed 22nd May 2019, 02:11
    OK I replaced the Power amp and the power levels are still at about 5,15 and 25 watts instead of 10,25 and 50 watts. I have attached an external watt/swr meter for these readings and the swr is less then one. Any ideas? Ken
    10 replies | 463 view(s)
  • N4AAB's Avatar
    Tue 21st May 2019, 17:35
    N4AAB replied to a thread Hello! in Introduce yourself
    Hello and welcome to the forums !
    1 replies | 154 view(s)
  • N4AAB's Avatar
    Tue 21st May 2019, 17:32
    I found out my Internet provider filters emails about 10 years ago. They don't tell me when, nor what, they filter other than they claim its all spam. They used to filter my password reset requests for other forums. Apparently their filters didn't like the headers or something similar.
    6 replies | 285 view(s)
  • KD9KVS's Avatar
    Tue 21st May 2019, 01:49
    KD9KVS replied to a thread The lovely C.B. in Non-Ham Radio
    Maybe I view things a little differently, if someone takes time to do the studying to learn how to build or do anything with anything, they are doing what they can to better themselves. Trying to remember that you were probably at that place at some point, and remaining humble to what they are doing. Maybe congratulate them and make suggestions on how they can improve it from one you built years ago. Maybe I think to simplistically, but life is to short to be haughty over anything. As Ms. Frizzle would say, take chances, make mistakes and get messy!!! Do not forget to have fun. When you have a bad memory, and have had a near death experience that forever changes your life, it is even easier to appreciate the small things. I will get off my soapbox and hush for the time being. I really do appreciate reading others stories and experiences. Thank you all for sharing, and keep them coming.
    10 replies | 245 view(s)
  • maalikm's Avatar
    Tue 21st May 2019, 01:41
    Thank you for your suggestion, however, I've found a $35 Rigblaster Plus on eBay and decided to give that a try. What is the procedure for using this interface?
    2 replies | 144 view(s)
  • scottwiblemo's Avatar
    Mon 20th May 2019, 20:53
    Please change my username to KG7LRL.
    0 replies | 58 view(s)
  • Stargazer's Avatar
    Mon 20th May 2019, 19:01
    :calm: Hello all, My name is Ian. I recently purchased an inexpensive home brew vertical at a ham flea market. It is in 5 sections which screw into each other. The whole thing, when collapsed, fits inside PVC tubing. I am at a loss as to how put it all together and attach a cable for my IC-756PRO (also recently purchased). I took a few photos with my phone, but don't know how to post them here.
    0 replies | 89 view(s)
  • 5B4AJB's Avatar
    Mon 20th May 2019, 13:28
    No, you already have it working :p Those interfaces you mention only offer a seperate soundcard interface and PTT. You can use your existing PC sound interface for the same effect. The best solution for transmit interfacing without a specialised box is to try and find an old dial-up modem card, desolder the 1:1 transformer from that and connect it between the PC output and radio input. The radio output to the PC input is simply connected. For the PTT signal, the serial port RTS signal is used. Download the manual for your motherboard and see if there's a serial header on the board you can use. Here is my old faithful using an opto-isolator (recommended).
    2 replies | 144 view(s)
  • 5B4AJB's Avatar
    Mon 20th May 2019, 13:17
    5B4AJB replied to a thread The lovely C.B. in Non-Ham Radio
    That's not uncommon, especially if it's an OT club, happened to me. I'd just got my first callsign, built a Double Diamond for 2m and took it to a friends club where I was asked how I designed it and replied that it was built from a book, immediate mockery followed, which kind of put me off clubs for a long time...
    10 replies | 245 view(s)
  • 5B4AJB's Avatar
    Mon 20th May 2019, 13:10
    Have you tried an old satellite dish with a simple USB dongle at the feedpoint?
    2 replies | 123 view(s)
  • Tempstar's Avatar
    Mon 20th May 2019, 13:10
    https://www.streakwave.com/itemdesc.asp?ic=APG5HacT2HnD&eq=&Tp=&o1=0 I use this 3/4 mile away daily.
    2 replies | 123 view(s)
  • 2e0sve's Avatar
    Mon 20th May 2019, 12:09
    Does any one have any experience and recommendations on long range WiFi antenna. The kind of things I mean is using remote WiFi with an external antenna. I am particularly interested in experience in urban environments. Kind of thing I mean is like these (these are just from a fairly simple google). https://uk.rs-online.com/web/p/products/7839634/?grossPrice=Y&cm_mmc=UK-PLA-DS3A-_-google-_-CSS_UK_EN_Computing_And_Peripherals-_-Wireless_Components_And_Modules%7CWifi_Antennas-_-PRODUCT_GROUP&matchtype=&pla-428943044526&gclid=EAIaIQobChMI-5by5YGq4gIVjpTtCh1GawdKEAQYASABEgItAPD_BwE&gclsrc=aw.ds https://www.aliexpress.com/item/VOBERRY-New-Long-Range-3KM-High-Power-5800MW-58DBI-USB-Clipper-Wireless-Wifi-Adapter-Antenna/33000800086.html?spm=a2g0o.productlist.0.0.76b94295MmeFsD&algo_pvid=2ceae380-e246-4d80-bd61-c1e4e164f843&algo_expid=2ceae380-e246-4d80-bd61-c1e4e164f843-1&btsid=a4089da0-35d9-4cba-a63c-543a75df3ae1&ws_ab_test=searchweb0_0,searchweb201602_5,searchweb201603_52 ...
    2 replies | 123 view(s)
  • KD9KVS's Avatar
    Sun 19th May 2019, 23:40
    KD9KVS replied to a thread The lovely C.B. in Non-Ham Radio
    I'll have to give it a go. Won't be tonight as storms have been rolling through, but soon. I still enjoy cb. Sent from my SM-S767VL using Tapatalk
    10 replies | 245 view(s)
  • brandon lind's Avatar
    Sun 19th May 2019, 19:11
    I decided to compare VF measurements using 4 different pieces of equipment on the same coax cable. Equipment used: RigExpert AA-170, Picoscope 3206D with homemade TDR, Bside component tester, and a Klein Tools MM400 DVM. The cable was an OPEK RG-58/U (radio shack variety) previously cut as a 1/2 wavelength 11m cable for measuring antenna feed point impedance's. To my surprise, the Bside component tester managed to yield a number almost identical to the TDR measurement. I shared the PDF of all the pictures i took along the way on google drive. its 14 something MB https://drive.google.com/open?id=1ThJ6zrwlD6vQRavGTGX92HG9m61x7G3Z
    0 replies | 107 view(s)
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