Probably does not matter, a VNA might be able to help.Owen Duffy might have some online guides. Binocular cores used as autotransformer probably does not matter if the windings are nearby to each other.Wants to control HF radio from Raspberry Pi.Jimmy suggested NodeJS, any good starting point? Tutorial on how to server a web page that has controls? Xiegu X-6100 any good? Looking for shack-in-a-box radio.AD6OI Heiko – Maritime Mobile at the airshow. Icom 7100, 7000 are great, Yeasu FT-991A also great.This is not a shack-in-a-box radio, missing VHF/UHF. The mysteries of ham radio are unknowable, antennas more so.Ī portion of my OCFD fell down in the storm and is laying on the roof.Personal preference is OCFD for mutliband in HOA’s.Do you prefer a halfway dipole or off-center fed dipole?.Some things with antennas are a bit obscure, it just is. May also be the radiation pattern has changed.Has 4 BTech 25×4 radios that go deaf after another party transmits, the receive indicator shows a signal but no audio is heard.Ray has seen a similar problem, there is a setting in the menu that controls what “slot” the radio is receiving on, it can “lock” when it hears another frequency other than the one you are listening to.Recently install FLDIGI, like to get feedback and tip from others.Just need a sound card and way to connect to the radio.More info might be had at the upcoming SOARA Saturday. WA6LDI, Phil, on his way to the candy store.K7KCE, Joe, Picnic 9/24 at Laguna Niguel Regional park, shelter #3, bout 12:30.AJ6LU, Harald, random wire, rain gutter, vert 6.5 dB, 18 dB yagi, what is a reasonable gain? 29 feet gutter, 10 feet to unun, 25 feet in the air, about end fed 40 foot long, chart with dBd values, need website here.WB6UOO, Claude, d104 microphones converted to Heil d104 dynamic cartridges, something went wrong with conversion, doesn’t work.K7KCE, Joe, propagation question, vert horz polarization, what is circular polarization? how it does that? satllites rotate.What is the use of all the digital modes and internet linked services when the internet goes down?.The internet is rarely down and very rarely down for everyone.The digital modes like D-STAR and CFM do not need the internet to function. ![]() When tuning an antenna and measuring SWR on a NanoVNA there seems to be an interaction between tuning and the 50 ohm insertion point on the smith chart.The reactance is a function of the inductive and capacitive components of the system, as you tune the antenna you change both.Also you change the electrical length of the antenna which changes the insertion impedance on the smith chart. You need to compensate by changing the delay in the VNA. What are folks using to attach coax to eaves and what do you use to weatherproof the connections?.The new silicone self adhesive tape is very nice, sticks to itself but not the connector.
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