AS an owner of other groups.io blogs... groups.io offers a plain text, minimalistic blog without HTML at no cost to the group. It has limitations regarding file storage etc. But for obscure blogs like

Pedro- That's a great Christmas gift... I t is amazing what is packed in that little box.. Since so many hams in the USA read this blog, and if you were in the USA, I would recommend R & L Electronics

Using a NanoVNA or a MFJ 259 either is the source of the RF... whereas using a transmitter then a short length of coax to a SWR bridge, changes the length of the source of RF to the antenna.. Larry W8

Here's the deal.... NanoVNA is very excellent and has complex abilities. It operates over a wide range of Frequencies and will test or can be used for developing devices besides Antenna.s However it r

A SWR meter is a relatively new thing.. Actually a RF amp meter- a thermal couple device was used prior.. if you were a rich ham- If you were poor like I was you'd use something like a #47 light bulb

Dave- I may be missing something... my thinking is a 49:1 autotransformer should be 50 to 2450 ohms.... you terminate with a 4.7K ohm resistor, and your SWR plot is basically 6,4mhz up is 2.0 SWR to 1

Regarding getting to 100dB dynamic range.. I bought and used one of those 20-30 dB broad band low noise pre-amps you can buy on ebay for under $10... Place it in line when tuning the notch, tune for m

Any metal object within 1/2- 1 wavelength of an antenna will effect it. In free space a dipole has an impedance of about 73 ohms. --caveat- if it is a flat top. if for instance, you start changing it

Did you verify the NanoVNA against WWV???? Mine is 1.25kc off.. close enough for amateur work..

DITTO's I bought mine there and many more items (NanoVNA-H4 +). I've even been to the store. I live in Kansas and detoured one Christmas having visited family out East. Larry W8LM

QUESTION TO ALL BUYERS OF THIS "EBAY" 5GHZ "Tiny SA"- apparent new flavor of the month. Is it hardware alone that makes it run up just beyond 5Ghz.? and Will it take any of the TinySA Ultra stock firm

After checking the charger-cable via another device such as a smart phone. to detect charger is working.. The nicad could be depleated to where the CPU will not boot. Put it on the charger for 3-4-6 h

If you look at a graph of voltage versus discharge time, you will see a knee where the voltage drops quickly just before the battery is fully depleted. If you want to test battery performance read my

I had a lightening hit.. (125 feet of wire to the barn) only mine was direct bury triplex and the neutral was gone.. So lights worked but the door opener would vary from 83 volts to 154v and sometimes

Tandy made notoriously crappy RG8U for the CB people. Later on they also made some "better stuff" but not Belden quality. If you want to verify the RS crapola RG8... slit a piece open..Then remove the

ALL- I never saved the link and I looked at Banggood.com and do not see any like the ones I had. Frankly that purchase was pre-pandemic and Banggood is like Amazon.. A collaboration of individual sell

I have bought strip tools from Banggood.com instead of Ham Radio Outlet. Granted they take 3-4 weeks but they were like $1.65 USD.. I always order multiples as if ordering one and waiting a month it's

Roger- In the graph you supplied, The difference seems to be 1/4 dB approximate. Am I correct? If so isn't that "close enough" for Amateur work? After all the transformer is but one component of the e

*Dave - WØLEV* The ARRL Antenna Handbook ladder line nomograph that shows spacing versus wire size I have been seeing in ARRL publications for the last 55 years licensed. I agree it does not take into

Darwin here in REALVILLE - 430 ohms when 450 is specified 4% off 440 ohms when 450 is specified 2% off Your calculated Zc of 308 and 318 is 3% repeatability. yet not "close" to assumed normal impedanc