RS-HFIQ 5 Watt HF SDR Transceiver by HobbyPCB

Discussion in 'Amateur Radio News' started by M0DQW, Sep 5, 2021.

ad: L-HROutlet
ad: l-rl
ad: MessiPaoloni-1
ad: L-Geochron
ad: Left-3
ad: L-MFJ
ad: Left-2
ad: HRDLLC-2
ad: abrind-2
  1. AA5BK

    AA5BK Platinum Subscriber Platinum Subscriber QRZ Page

    excellent, thanks for posting!
  2. DO1FER

    DO1FER Ham Member QRZ Page

    Maybe is WINE a solution. But it is almost a lottery game to get the Windows software stable. There is more the solution of a vitual system. But then Windows is needed again, to start it in a Linux window.
  3. DO1FER

    DO1FER Ham Member QRZ Page

    Maybe you will find something that is right for you at the following adress:
    AA5BK and W3PX like this.
  4. M5FRA

    M5FRA Ham Member QRZ Page

    That was a really good video, very informative, prcatical and not over hyped. Wish all Youtube videos were like that, you obviously know what you are talking about!

    73 de Colin G8FRA/M5FRA
  5. W3PX

    W3PX Ham Member QRZ Page

    DO1FER likes this.
  6. F5NPV

    F5NPV Ham Member QRZ Page

    K3RW and AB2YC like this.
  7. PA0MHS

    PA0MHS XML Subscriber QRZ Page

    If a 13dB amplifier would only give you 13dB gain when excited with 50W and not with 5W, it wouldn't be a linear amplifier or at least one that is heavily compressing. 13dB is 13dB. If a correctly designed linear 500W amp gives you 13dB of gain without compression or clipping, it will also have 13dB of gain when driven with 5W or 5mW.
    F5NPV and W3PX like this.
  8. AE0Q

    AE0Q XML Subscriber QRZ Page

    Not always true. There are amps designed to be driven with more than 20w because that enables the fault protection circuits. Below 20w, the low gain fault is disabled so the amp can be tuned up when the optimum settings are not yet known. Alpha and Acom amp use this.

    Another thing to consider are amps with Electronic Bias Switching. It takes SOME level of RF drive to enable the full operating bias to be turned on after the amp is keyed into transmit, typically 1/2 watt or so of drive. This is a heat-saving function, it partly turns off the tubes between Morse elements on CW or during dips in voice on SSB. Many Alpha amps, going back to the 77/77Dx/77Sx and 91B/99/8100, and Acom amps using the GU74B use this.
  9. PA0MHS

    PA0MHS XML Subscriber QRZ Page

    Wow, that sounds like a recipe for distortion and splatter...
  10. AE0Q

    AE0Q XML Subscriber QRZ Page

    Doesn't happen. There are at least 3500 amps out there using EBS, if it was bad it would have shown up sometime in the last 50 years since they have been manufactured ...

Share This Page