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Re: Remote "bottom of the garden" QDX...
Peter. Your video is amazing. Thank you for sharing.
By Linus · #85764 ·
Re: Sources for hydrogen/helium in small quantities? #u4b
Yeah - you generate oxygen as well as hydrogen. Hydrogen develops at the anode and oxygen is found at the cathode. Lee KX4TT
By Lee · #85763 ·
Balloon question
Is there not an issue launching a balloon and interfering with aircraft flight paths? I am a retired aircraft mechanic and have seen what foreign object damage can be done to an engine. I am curious
By Glenn Maclean · #85762 ·
Remote "bottom of the garden" QDX...
Some of you may remember I had a dream last year (more a revelation actually) when lying abed about the QDX.? I realised that it had no physical controls and operated purely under software control
By G3SPL · #85761 ·
Re: Sources for hydrogen/helium in small quantities? #u4b
Yes, I am aware of the Hindenburg and have no desire to re-enact it in miniature. Regarding electrolysis, would the (necessary) addition of an electrolytic affect the composition/dilution of the gases
By John AE5X · #85760 ·
Re: Sources for hydrogen/helium in small quantities? #u4b
https://www.youtube.com/watch?v=d85OX6yEwE0
By Linus · #85759 ·
Antenna System Multi-band
Hi there. I am considering different antenna types in anticipation of setting up a QDX?Transceiver. Right now, I use a segmented dipole ( https://sweers.ch/segmented-dipole-antenna.html ) that is
By Linus · #85758 ·
Re: BS170 Sources
That's good to know.
By Joshua KJ7LVZ · #85757 ·
Re: QDX and eliminating the laptop
Life in that ASUS EEE PC afterall. Glad it worked for you. Those things are built like tanks. 73 de Andy
By - Andy - · #85756 ·
Re: QDX V3 arrival and build
My oder # is 57185 the way I take it is ,what I use to say to my kid when they ask when do we get there I always said "when we get there " I am sure the QRP LAB team are on over load trying to get the
By John Kiernan · #85755 ·
Re: U4 tracker map display
Thanks I tried the Avast Browssr but still get the Google Development warning and map overlay r
By Richard Fairman · #85754 ·
Re: Sources for hydrogen/helium in small quantities? #u4b
Or use lye, aluminum and water and avoid the electrolysis...................use lots of care in this reaction; it generates a lot of heat as well as potentially explosive hydrogen gas. Do this
By Lee · #85753 ·
Re: QDX V3 arrival and build
Looks to be under 3 watts but frankly I would be inclined to operate at 8 to 9 volts. Whilst I said eBay, I looked where I bought the power supply kit from - Banggood. Currently showing GBP8. ?It
By Pete Snipe · #85751 ·
Re: Sources for hydrogen/helium in small quantities? #u4b
Hydrogen would have the CHEAPEST lift. FWIW, the reason that the Hindenburg was full of hydrogen was that the US wouldn¡¯t sell helium to Nazi Germany. The Hindenburg made multiple trips across the
By Jim Strohm · #85750 ·
Re: Sources for hydrogen/helium in small quantities? #u4b
I don¡¯t have answers to your questions. Here¡¯s a BBC report explaining why the availability and price of helium has become so unstable. https://www.bbc.com/news/magazine-24903034 ¡ªMike Perry,
By Mike Perry, WA4MP · #85749 ·
Re: Sources for hydrogen/helium in small quantities? #u4b
Hydrogen is lighter but also a bigger molecule so it is less likely to leak. Colin K6JTH
By Colin Kaminski · #85748 ·
Re: Sources for hydrogen/helium in small quantities? #u4b
Umm, yes. Filling a balloon with it is left as an exercise for the student? How bad is party store helium, assuming you can get it? Also, how much do you need? Local stores appear to have 15 CuFt for
By William Smith · #85747 ·
Re: Sources for hydrogen/helium in small quantities? #u4b
IIRC, hydrogen is lighter than helium but has larger atoms, so it doesn¡¯t deflate a balloon as quickly as helium. But if you¡¯re careless, it is rather reactive. 73 Jim N6OTQ Sent from my
By Jim Strohm · #85746 ·
Re: Sources for hydrogen/helium in small quantities? #u4b
Helium Shortage https://www.morningbrew.com/daily/stories/global-helium-shortage?utm_campaign=mb&utm_medium=newsletter&utm_source=morning_brew&mid=6b66a9666c29acfe7a682fd0c2f45a6a
By W2BEE · #85745 ·
Re: Sources for hydrogen/helium in small quantities? #u4b
You can make your own hydrogen with water, an electrolytic salt (like sodium chloride), and some low voltage DC. O2 comes off one electrode and H2 comes off the other. You figure out which. This is a
By Jim Strohm · #85744 ·