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Lid is about 60" x 30" all metal and grounded to hydro ground. AA-30 analyzer shows resonant points at 18 MHz and 15 M band also.

Oh you have to search back in the group… about 1.5-2 years ago. There was a lot of discussion on this subject. It’s all here though: https://ubitx.net/tag/rd16hhf1/ Sent: Friday, April 3, 2020

For HF? What band and how big a chest freezer? Ken, N2VIP

A "large" steel cookie sheet would have to be a quarter wavelength square (10 meters or 33 feet on a side for 40 meters, 5 meters or 17 feet on a side for 20 meters) to be a "good" counterpoise - how

I have also more recently found metal lid on chest deep freeze acceptable or tolerable as well.

Christopher, The LM7805? 5 volt regulator can take up to 35 volts, The regulator issue with the higher voltage is the thermal power dissipation goes up as the input voltage goes up.? The stock

Request for help replacing IRF510 by RD16HHF1 on uBITX v4, what changes should I make? a) RD16HHF1 resting currents? b) T11 how do I do it? c) D-G feedback? d) Capacitance between the RD16HHF1 Drains?

Good morning Andy and all: I have had some luck using large steel cookie and or cupcake sheets under a good Mag Mount, preferably lying on the ground but with some luck on a dining room table with

On the v3 I have found a slight but noticeable decrease in the sound quality when I have increased the voltage to the receiver. I suspect that the op amp is being overdriven. The easiest way to limit

I haven't read all msgs in this thread closely but if you live in an apartment with a balcony with a metal railing you might consider a mag? mount centered on the railing and connect the railing

For your "sheet of metal" to be large enough to be effective, it would most likely be objectionable, too. I second the recommendation someone else gave you. Try using 1, 2, or 3 ground radial wires

I know I have said this before but I will again now without malice. The manager of the property is behind me working to build out a working Hf/vhf/uhf station. They let me put a hole in the wall to

My V4 shows a 470pf at C81, and my comment was a reflection of a bad pencil note on my "to do" list. Previous posts had suggested 0.01uf across C81 as improving the low power on 40m, so that's what I

For portable use I have used a clamp-on mount (also sold to make a hamstick dipole) attached to a metal stake. Sticking that into the ground made a usable antenna. In cases where I didn't think I had

Hello, I’m curious what I would need to do to use a mobile mag mount for an HF whip without mounting it to a car. I’m guessing I need to get a large sheet of metal to act as a ground plain.

Thanks, I was lucky enough to be given a complete transceiver I don’t want to mess with cutting traces and modifying it until I have everything set up. I just wanted to make sure I didn’t need to

In the v3 the audio output chip is at its limit with 12 volts,the PA can be run from say 15. or a bit more for increased rf output Get Outlook for Android<https://aka.ms/ghei36>

Sorry. I sm withdrawing my statement. V3, the TDA2822 WILL LIKELY GET DAMAGED AT HIGHER VOLTAGE. LIMIT TO 12. After all you can reduce 13.8 to 12 by some pot on the psu.

I use 12 volts but a higher voltage can be delivered to just the PA feed to boost the rf output. Get Outlook for Android<https://aka.ms/ghei36> ________________________________ Sent: Friday, April 3,

You can use q3.8. Pl dont again say + /- All the best. wrote: