IC-705 S-meter steps every 3 dB ??? WTF !!!

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  • čas přidán 11. 09. 2024
  • Brand new IC-705 S-meter test. Each step below 9 equal to 3 dB instead 6.

Komentáře • 22

  • @kao354
    @kao354 Před 3 lety

    The same thing with IC-7300, see QST review (August of 2016, specifically "Lab Notes"). AFAIU 705 is a small 7300 with VHF+UHF. Really, practically nobody strictly follows 6dB per S-unit requirement.

    • @davidfainitski4201
      @davidfainitski4201  Před 3 lety +3

      Hi. This is a full digital transceiver and it is very easy to do an accurate S-meter. All my SDR receivers (SDR-programms) have a true S-meters with better then 1db accuracy. That is just mathemathic formula and nothing more. They don't want to do that, so SDR revolution is going to us very slowly.

    • @kao354
      @kao354 Před 3 lety

      @@davidfainitski4201 David, I completely agree with you, at least on this point and I do appreciate your work in SDR stuff and not only that. I have no idea why Icom decided to do it like that, just wanted to mention that it continues from IC-7300.
      By the way, I am Alex, W5KAO/RV3DFL, if you prefer we can talk in Russian. I decided to follow the language of you comment in description of the video.

    • @danmartin3522
      @danmartin3522 Před 3 lety

      My Flex 6600 is spot on.

    • @davidfainitski4201
      @davidfainitski4201  Před 3 lety

      @Riho B. Hi. According to this video, S meter has a step 6dB per unit above S9 and 3db per unit below S9. Can you explain this behavior ?

    • @kao354
      @kao354 Před 3 lety +1

      @@davidfainitski4201 Reading review of Yaesu FTdx100MP (200W version) in the December issue of QST. ARRL lab says that their S-meter is also 3dB per S-unit. There has to be some logic in this, but I cannot see it. :-(

  • @RoelandJansen
    @RoelandJansen Před 2 lety

    the only thing important is the snr that makes you get the signal to receive in your ears or not.
    such meters are gadgets:
    "what is my signal?" -- 5 and 9!
    "thank, using QRP, 2 Watts" -- oh you are 5 and 4
    I really could not care less.

    • @davidfainitski4201
      @davidfainitski4201  Před 2 lety

      Thanks for this reply, you are right. But it is really wierd for me why the DDC , in fact fully digital controlled system can't follow so easy generally accepted sings as a signal level measuring.

  • @danmartin3522
    @danmartin3522 Před 3 lety

    I confirm this finding using HP-8921A as source S9 = -72 but S3 should be - 109 but shows up at -89 (Thanks David)

    • @danmartin3522
      @danmartin3522 Před 3 lety

      An email has been sent to Ray Novak N9JA (Icom Rep USA)

    • @davidfainitski4201
      @davidfainitski4201  Před 3 lety

      @@danmartin3522 I've found more weird things, watch my next videos :)

    • @davidfainitski4201
      @davidfainitski4201  Před 3 lety

      @@danmartin3522 could you ask him please about the main speaker ? I have broken one in my brand new 705. I would like to change it by myself.

    • @danmartin3522
      @danmartin3522 Před 3 lety

      @@davidfainitski4201 no reply yet.. I don't understand your language, but followed video just fine. his email is N9JA@arrl.net

  • @UW5EHC
    @UW5EHC Před 3 lety

    Прикол, думал это 2 Дин магнитола сразу )))

    • @davidfainitski4201
      @davidfainitski4201  Před 3 lety +1

      А чё ? Можно встроить вместо магнитолы. FM AM радио ловит, плюс куча бонусов.

    • @UW5EHC
      @UW5EHC Před 3 lety

      @@davidfainitski4201 я ж о чём.

  • @RA6ANR
    @RA6ANR Před 3 lety

    Хитро)))типа,чтоб без антенны S0 показывал...

  • @belraskr1139
    @belraskr1139 Před 3 lety

    чё там ?приведение на таких частотах живут ?

    • @davidfainitski4201
      @davidfainitski4201  Před 3 lety

      Нет, сигналы точного времени передают да и любительский диапазон там рядом.