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I had 747 in early 90's XX century.
I use 30MHz scope. Works as it should.
5121 is CMOS chip, be careful, it is very easy to kill by static or not grounded soldering iron.
See schematic attached. Different radios, but...
Conditioner won't help. Imax is endfed antenna, so it means that coax is part of the antenna and picks all the noise around. Antenna must be...
So you have to drill a hole and use 2.5mm or 3.5mm jack socket. Take a signal from cathode of D14. When plugging a plug, you must disconnect...
Does ir have a socket for external meter?
Yes, it's normal.
If anyone would like to diy there it is: https://www.worldwidedx.com/threads/homebrew-astroplane-build.34985/
Display issue stigma touched K4 lfmao...
Look at PA0RDT miniwhip antenna. Works very good, I use it since some time. Hanging on a tree.
Must be properly grounded.
Plans are widely available, so why not to produce it.
I remember first Astroplane - called "Top One" in Poland I saw in 1989 and it was...
I looked.. and?
Radio can, outdated software can't.
Did you read chapter 7 of advanced manual?
Shouldn't be a problem from touchscreen...
You see that also on s-meter.
It should be dead short for DC. No matter for RF.
Butcher mod I meant are widely available swing kits doing only a harm to the signal.
NPC-RC is different pair of shoes. Works as it should - good....
2 independent direct sampling RX... no competition.