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My first real on the books job was at a medical school. One Monday morning we came in, fired up the equipment, I went to the psych department to prepare for a psych evaluation and the control room

While working for HP, I had the job to install a cable monitoring system for return path ingress. One "system" in Ohio was so leaky, World Wide Catholic Radio overloaded the return path amplifiers.

our government will always be on the side of who ever contributes the most to their campaign fund

Heh. :-)

My experience with lithium batteries is extremely limited to those in our phones and laptops. I've never tried using them as a build it project. I have seen a Samsung phone go up in flames, be dosed

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 2.6v

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 that

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 of a

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 that

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 Sent: 9

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 wire.

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