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  1. fourstringburn

    New version Icom IC-7300 MK2

    There are NO traditional roofing filters on full SDR radio's like the Icom 7300 including the new MK2 version and Yaesu FTDX710. They use digital processing filters to try and mimic similar results. True roofing filters are found on mid price range level to high end superhet and hybrid...
  2. fourstringburn

    New version Icom IC-7300 MK2

    So this proves what I read about having an all SDR receiver. I once played around with an SDRPlay and had some overload issues. From what I understand about SDR receivers is a single FPGA is sampling an entire band and the more signals on that band especially on a contest weekend like the one...
  3. fourstringburn

    New version Icom IC-7300 MK2

    Ok, so how do you control front end overlaoverload on a crowded band like 20m on a contest weekend? This is the known pitfalls of direct sampling receivers and not a problem with superhet.
  4. fourstringburn

    New version Icom IC-7300 MK2

    Yet Icom is still relying on all direct sampling RX where Yaesu uses a hybrid with a super-het front end in front of direct sampling on the FT101 and FT10. Elecraft is still working on the KX4 HD Hybrid. The hybrid is better on a crowded band where an all SDR will be subject to front end overload.
  5. fourstringburn

    Tokyo Hy-Power AM operation

    That is a nice amp and they are well built and known to reliable. I'm sure if you wanted to sell it, somebody would like to have it.
  6. fourstringburn

    Tokyo Hy-Power AM operation

    I have the Tokyo HP HL-450B amplifier which is capable of 100% duty cycles on modes like AM, FM, RTTY etc with up to 40 watts drive but the manufacture recommends reducing drive about 20% on those modes. Your amp is capable of the same but can take up to 80 watts drive on SSB but it is...
  7. fourstringburn

    102 Inch SS Whip Sticker Shock!

    Full quarter wave whips are the gold standard but not always pratical for some mobile installs. A Wilson 2000 will work just fine but that are almost as expensive. The obvious advantage to them is manageable height and fine tuning. The losses in the coil on the Wilson is insignificant to the...
  8. fourstringburn

    102 Inch SS Whip Sticker Shock!

    Those whip get shipped as oversized so where ever you buy them online oversized shipping is included in the price or billed separately. $78 sounds about right. DX Engineering sells the whip for $42 but add $39.99 for oversized shipping and it's $82 Remember when Ratshack sold them, the last...
  9. fourstringburn

    New version Icom IC-7300 MK2

    Just came across this that Icom has a new version of the IC-7300 and it's called the IC-7300 MK2. Here is a brochure to give the details.
  10. fourstringburn

    +5 -5 %

    Consider this one for testing and regular in-line metering Auto power input settings and no slugs. http://telepostinc.com/lp100.html
  11. fourstringburn

    +5 -5 %

    What Captn Kilowatt said about using full scale readings is true with just about any good meter out there. This is why other type meters like analog needle have different power scales. The most accurate (or close enough) reading should be when the power measuring is at least 3/4 scale or more...
  12. fourstringburn

    AnyTone AT-5555 Plus Service Menu

    What I do know is in the service menu mode, the settings are value references and no two radio's will have the numbers same across the board. Also there is no factory default to revert back to so write down the original values before making changes so you can get back to the where you started in...
  13. fourstringburn

    Nissan Frontier Antenna Mount Options

    Are you getting that noise on all bands? I had one truck where on 40m I would hear the acceleration noise but other bands were fine. Could never eliminate it, just got used to it. As for LEDs, it maybe the the LED exciter generating the noise. I haven't experienced that yet. If you have enough...
  14. fourstringburn

    Nissan Frontier Antenna Mount Options

    Bending could do it or maybe some shims on the opposite side that it's leaning would do it. May need a longer bolt to compensate for it though. You'll get it!
  15. fourstringburn

    Nissan Frontier Antenna Mount Options

    Looks solid and stable. Yeah, I think I would put it on the passenger side. Is there a way you put some spacers on one side of the bracket mount to level it up? Other than that, it looks good!
  16. fourstringburn

    6 inch spring for 102" whip

    Hustler antennas still sells the SSM-3 pot belly stainless steel spring. It is kind of heavy but it is only 4 inches though. These are a good as you are going to get for a 102 whip for sturdiness and long life without rust. Some of those truck stop cheapy springs will likely flop the 102 whip...
  17. fourstringburn

    Nissan Frontier Antenna Mount Options

    Maybe, I only said that because the ATAS seems big enough where it might obstruct some some of your view on the drivers side. Of course you"ll have to judge that for yourself.
  18. fourstringburn

    Nissan Frontier Antenna Mount Options

    Yes, it does look like a good mounting scheme. Maybe put a 2m/440 antenna on the driver side since it shouldn't block your view. The ATAS should work well on the passenger side. Be sure to post pics of the finished install.
  19. fourstringburn

    audio recorder

    You can do it through a computer but you have an older radio with no direct USB connection but it can be done. You need a 8 pin DIN connector to go from your radio's ACC 1 port and wire it into the computer sound-cards analog audio input/outputs. You'll be able to do both, record any audio off...
  20. fourstringburn

    dead carrier

    Actually the break in settings on the 746 is selected by the toggling the VOX button