Hi there and thanks for visiting.

This blog is a collection of things that interest me relating to radio communications, stuff that flies, electronics and a bit of bushwalking.


31 Responses to About

  1. Peter E. Wookey says:

    Hi Glen,
    I have built the analyser using a Nano but it does not run for me.
    Would you be kind enough to share your code for the Nano and the pc.
    Peter G6ESJ

  2. Bob Innes says:

    Your QRP end fed for 40, 20, and 10m. I am confused by the markings and connections of the pri & sec on your drawing, compared the number of turns. Further to this, the connections of the bifilar windings are not all that clear in your drawing or photographs. I do have a theory on it, but would like to hear from you.


    Bob Innes……….ZS6RZ

    • vk3yy says:

      Hi Bob,
      Apologies for the slow reply, the primary and secondary are labelled the wrong way around in the diagram! Will fix it soon and take a better photo of the windings.
      Cheers, Glenn.

  3. Tnx for the response. I have also built the MMR40, but not with the kit. works OK but having great problems suppressing the carrier. I used 4.915Mhz filter.
    I read your article on your MMR40- very good! 73’s Bob…….ZS6RZ

  4. pd0pkg says:

    Hy glenn i read THE articule of THE analyzer whith pleasure but can you share THE PCB file and THE nano file my adres is pd0pkg@home.nl
    Many thanks
    from Gerard from THE netherlands

  5. Hi Glen, my name is John VK4DP from Barcaldine, Central Western Queensland AKA the Bush.
    I have all the components for the analyser, and was wondering if I could purchase the PCB from You.
    Heres to a great new Year, and hopes if I finish the analyser project, I can tune my Hexbeam

    • vk3yy says:

      Hi John,
      I am not really set up for manufacturing boards aside from prototypes (which take a while). There are a quite a few places on the web that will make a board if you send them the artwork. Good luck with your Hexbeam, would like to build one myself some time.
      Have a great new year, Glenn VK3YY.

  6. Jaye says:

    HI Glen,

    I came across this blog on the NBS mast and I’m impressed. I was wondering if you could clarify some things for me in relation to the pulley cap that sits at the top of the mast. I have a 12m length of 89mm X 89mm here, so I have homebrewed my base section. Basically a “H” beam that is sunk into the ground were the mast section pivots off will have winch system. I did purchase the hazer section from Dennis, VK4SX, that will fit straight onto my mast subsequently allowing my YAESU rotator to be mounted.

    I have sourced the same pulley from GENNIE where I intend to make this section up. I believe this is the same pulley that NBS uses on the cap section.

    From what I can gather the pulley would someway be mounted onto a shaft or a bolt into the 93mm section running right through. All the weight of the hazer and antenna is resting on this pulley . Can you please tell me how the pulley mounts into the 93mm section and does the shaft rest on the top of the 89mm mast section. I hope this makes sense to you!

    All the pictures I have viewed on the internet seem to indicated the hazer is right angle to the winch that is mounted at the bottom of the mast where the pulley is the same side facing as what the winch is.

    Would be please be able to take some pictures of the winch section looking up to the hazer. I’m not sure if you did take any pictures of the pulley section before mounting. I did try to email you this with the email posted to QRZ, but it bounced back to me. Hence posting here.

    Cheers Jaye VK2SD

  7. Tom van der meer says:

    Hi glenn

    While building a Chinese 45w pa for the ft-817 (which we cant get to work yet) i stumbled across your posting in the dxzone and it triggered my interest.
    What a neat setup! I was wondering if you can guide me to a schematic.
    Tnx in advance.

    73 Tom pa5fdx

  8. Sergio says:

    Hi Glenn
    First of all, my congratulations for the excellent site and information sharing.
    I have a request to you. I have a TR-PP-11 that is not working correctly that I would like to repair but I’missing the schematic. Can you share it with me?
    Many thanks
    Sergio, CT2JLS

  9. Barrie Angland says:

    Spotted your call sign on FSQ 7104Khz between 04.30z and 0500z.Yesterday
    Tried to e-mail you but got a wrong address return
    My location RE79so

    barrie zl2bja

  10. Alan says:


    I’ve just been reading the page on your website about the TR-PP-11. I noticed that you said you had managed to obtain a copy of the circuit diagram. I’ve been looking for the circuit for quite some time with no success. I have a TR-PP-11 that basically works except the output power on transmit is very low. Doubtless a driver or PA fault.

    So the obvious question, do you still have the circuit and if so could I beg a copy of it from you?

    Best regards,

  11. huseyin says:

    MMR40 can you send your files

  12. hi mmr 40 Would you like to share the printing circuit and the scheme of qrp I want to try too

  13. John Harper says:

    Hi Glenn,
    I am beginning to set up my station after having just moved into our home. NBS has delivered my tilt-up mast and I am beginning to organise a foundation etc. I have found your guide very useful, thanks for all your hard work and for making it available.
    John VK3MS

  14. Kostas says:

    73s many thanks

  15. Dr Ankur Baruah says:

    Hi Glenn,
    I’m Ankur from India, callsign VU2EHC.
    I’m newly licensed and have assembled a 10 watt uBitx Ver.6 QRP radio. I am building your QRP End Fed for 40m/20m/10m.

    I have two questions for you:
    1. What is the thickness of the magnet wire for the toroid/Unun and also the wire used for the antenna?

    2. What sort of SWRs did you get on 20 and 40 metres?
    Apparently, my cheap and fussy QRP radio cannot tolerate more than 1.5 SWR..

    Thank you for sharing your build and knowledge.
    May you enjoy good health and cheer!

    73 de VU2EHC

    • vk3yy says:

      Hi Ankur,
      I used 0.5mm wire on the toroid. The SWR is generally under 1.5:1 and can be dependant on height above the ground and the tuning of the radiating sections.
      Best Regards,

      • Dr Ankur Baruah says:

        That’s very helpful.. Thank a ton!
        Once I get it up and working with reasonable SWR, I’ll update you here,if you don’t mind.
        Until then, cheers and best regards!!

  16. joshuamesilane says:

    Remove the dots from your APRS messages. The format calls for spaces between the values 😀

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