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Hmm. I think I need the .7Vfd so that when added to string of lights, my lfp cell won't be discharged past 2.5v. .7Vfd + 1.9Vfd = 2.6v. LFP cell would have to have a greater terminal voltage than

This might be of interest to radio enthusiasts in this group. Cable TV systems have always had problems with RF leaking from and into their "closed systems." This is a bit one sided industry view

Try this to eliminate the 0.7V voltage drop... https://www.mpja.com/Ideal-Diode-Very-Low-Drop-Rectifier/productinfo/35486+DI/ I have no business relationship with MPJA other than as a satisfied

Lost the battle of yard lights. Now we have a plethora of dollar store rejects hiding amongst the weeds. Neighbor was very appreciative of the copper 120vac lights. Beautiful fixtures after stripping,

Sadly while English is my birth language I still manage to mangle it with frightening regularity. I'd blame it on being born in Appalachia but that'd be unfair. The truth is I am dyslexic and can be

Thanks Andy, Yes, VHF ? Of course, the internal antenna in the pager is always active but at lowband, wearing the pager on the belt, the effect is not significant. I have lots of antenna plots

Bertho, You probably meant "VHF", right?? Not VFH ("very frequency high"?).? But this might be a non-English language issue, if English is not your preferred language. It is only somewhat right

Antennas are fascinating, some of the simplest antennas work much better than one would expect and some extremely complex antennas that should work like magic are disappointing. As to SDRs, they've

Hello, I have a mixer shown in the link below.The way I calculate the noise coming out of the mixer is as following: -174+NF-conversion loss=-174+0.5-6=-179.5dB/Hz so far I am correct? also the Mixer

Use a PA0RDT Mini-whip as the buffer.

THIS? seems to gone way off topic,all i wanted to know was how to homebrew a way too hookup my sdr to my? yaesu ft-707 as a panadaptor.

On the subject of antennas: Lo-VFH pager antennas surprisingly are using the person's body as the antenna. The body "antenna' couples into the pager's internal antenna when it is when worn on the

I used helical resonators in a commercial VHF marine transceiver that I designed 1981. A 3-pole input section before the pre-amp followed by a 2-pole section. That was a long time ago! Bertho

Re static electricity on an antenna.... Wind, simple dry wind can induce enough voltage on a ~100 foot, 30 foot off the ground, random wire antenna to light neon bulbs. And that's with insulated

There is no way I can begin to explain intercept point without a lot of unsane math and graphics. The short answer, at some signal strength and amplifier fed two (or more) signals will start to mix

Interesting stuff. What's that "intercept point" referred to in the pdf? -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, ?a

That's surprising, as I thought that those parts had fairly hefty surge ratings. Or at least that's the case with a lot of rectifier diodes... I still don't have any antennas up (yet?) but am

https://dl1dbc.net/SAQ/Mwhip/Article_pa0rdt-Mini-Whip_English.pdf There are at least dozens of variations shown on the web. This is one that works as

Interesting ...

Thanks for the info ...