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love all the videos. Very interesting stuff! Keep ‘em coming!

Nice job!

How bout adding a volt and ampere meter?

These are highly inefficient compared to today's technology, however they produce very little noise.

Love it. Great power emitter follower circuit. Your build was awesome for radio. I just saved most of the final stages from a 250 watt PA (Paging) to do the same thing. That circuit is exactly what what I need. Thank you Sir.

A slight change to the circuit is to feed the regulator with a higher voltage to what you want to make up for the voltage loss on the transistors but use a lower voltage for the high current thus reducing the power dissipation on the transistors. I have made a number of these power supplies over the years toroidal transformers can be made to order these days. I used to rewind by hand in the past and a cheap source for a transformer is an old microwave oven replacing the high voltage winding with a low voltage one. Note the circuit is in the spec sheet for the 3 terminal regulators. My 13.8v 25amp supply uses 4 x 2N3055 on heat sinks mounted in a box with the transformer and a temperature controlled fan blows through this tunnel cooling heat sinks then transformer I have run it at 25 amps for 3 hours when testing its now 40 years old , the capacitor has been replaced and digital meter installed.

On the fans, you could always use a 24v regulator, too, to keep them slower and quieter....but you know that, anyway.

Cool video, thanks. I have found it online free on worldradiohistory and downloaded it. Many thanks for a fun project.

Would it be possible to make this supply variable up 12 volts say at 5 or 10 amps? I found a good place for transformers for these are from old battery chargers. I have a couple that were used to start cars rated at 100 amps. The transformer is good but their triacs were no good.

The biggest flaw I see in the construction is the rectifier diodes. The stud type are to be screwed into a heat sink. They'll get a lot warmer than you think as you pass 5 to 10 amp load.

The hardest part to get would be that transformer. What a beast!

Read the magazine article here : ruclips.net/video/VmzMpE-rB_c/видео.htmlsi=ATAZTjzNbARSk8UP Thanks Radionut63

WOW, long time since i seen that beast! Should build another one for old times sake. 😊

Island brogue accent this is beautiful

Thanks, excellent

Thank you, as my creativity has been severely blocked as of late

Some reading on this Rifle indicates that it Was also known as the Plymouth or Navy Rifle ! Only 10,000 were made Apparently by WHITNEYVILLE Not sure how many were .69 calibre because Many were.58 calibre.

On my 2nd yagi build in 1986 i used this gamma match system with the insulation and centre conductor of coax in copper pipe. Worked great. Later Yagi and verticals i used the hairpin (beta, inducto) match. Easy to adjust by sliding a short along it and for having the centre conductor of feeding coax connected to ground electrically. No static electricity at all.

There was the old Newfoundland joke about the "bullet". A young woman, who was obviously in the family way, approached the conductor to ask if he knew when the train was finally going to arrive in St Johns. The conductor looked at her and said that a woman in her condition should not be taking the "Newfie Bullet". She looked angrily at the conductor and said "I was NOT in this condition when I got on this train."

Merry Christmas!

Thanks for the explanation!

This is a great video!

Excellent explanation. Thanks! 73 de SM6XQY

Cool ole bank note and story.

Thanks for an excellent story for the start of the day!

very cool !

Great idea! Would love to see the build from start to finish. Especially how you put the glass and plexiglass together

Just a point, sliding the shorting bar along the element, while maintaining the capacitor fixed will adjust the Resistance. Adjusting the capacitor adjusts +/- j. Note there will be some interaction requiring several repetitions. But start with R then +/- j

Bet you could make these and sell them

Nice. I’ll give this a go, better than going up a ladder! Thanks.

Hello from Arkansas.

Nice build!

Thank you for this explanation! Easiest to understand by far.

Is it possible to make a 1/4 wave 3 element yagi for 11 meters? Thanks

Very interesting. Thanks for the vid. Hubby and I really enjoy your content

I think your explanation is probably accurate, and I have done a lot of genealogy.

Very good explanation-thank you! I am looking to build a three-element Yagi with a Gamma match so this helps me understand it and plan. Much appreciation, sir.

Best Video ive seen...on This

Most excellent

These have by design gamma (capacitative matching) in the lower section. Where the top section slides into the Teflon insulation there is a capacitive effect from the lower alloy section. Playing with the amount of overlapping alloy will change the impedance.

Thank you! Very interesting. And very inspiring. Learned a lot and I’m going to give it a try, building one that is.

Great explanation of a gamma match and loved the homebrew tuner in a biscuit (cookie) tin! For the life of me could not ‘nail’ your accent but after a little research discovered you are in FP5 land. Hope to work you someday.

Great looking "ringo"! Thanks for showing and 73 from Maine -W1RMD.

That I know of, you cannot solder aluminum except for zinc "brazing" rod and that is corrosive to electrical wiring. You definitely will never solder aluminum (aluminium) with electrical solder. Oops, I thought you were Irish. I guess it's aluminum in Canada. I love your designs, especially your lawn chair halo for 6 meters! Take care an 73!

Like 5 here from Mr. Garry for my Buddy in Foxtrap! That is CLEVER and Smart!

inspired by this video, I made a dipole for 1090MHz ADS-B aircraft transponders with a gamma match made from the inner shield of RG6 coax, it's dielectric and the center conductor as the movable rod. at 1/16 wavelength, the capacitor is only 8mm long. great experiment and I was able to get a 1.1:1 match even using 75 ohm coax. I will be using gamma matches a lot in the future!

Nice build. Have you ever tried to make one with Under Seat Steering?

Thx for explaining the make of the gamma match. It has been never so clear me.

excellent explanation - thank you

Than k you...Great presentation 73 W3JYA