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Title: Meets Code (yeah right!) :-) Post by: steve_qix on April 08, 2018, 09:10:42 PM So, here's the problem.... Wayne WA1SSJ built a (very amazingly beautiful) 24 FET transmitter. Pics of the rig are forthcoming when Wayne finishes with the labels.
However, back to the point - we needed to test the rig. Wayne brought the whole thing to my place, and I ran an exhaustive battery of verifications and tests on the RF deck and pulse width modulator. Needless to say _everything_ performed flawlessly right out of the box. However, the transmitter, built of course correctly by Wayne had a nice 240V plug on the end - and of course I have not matching 240 volt outlet. Undaunted, the next best approach to the problem was brought to bear. And here is the result. Of course this definitely meets the N.E.C. ;D (and if you believe THAT one, I've got a bridge for sale over in NY). (http://www.classeradio.com/meets_code.jpg) Title: Re: Meets Code (yeah right!) :-) Post by: PA0NVD on April 08, 2018, 09:17:24 PM The only problem I see it that it seems that the isolation bar of the left switch is reversed and should be mechanically linked to the right switch...The rest is ok ;D
Title: Re: Meets Code (yeah right!) :-) Post by: KB2WIG on April 08, 2018, 09:22:38 PM I always tape the clip leads so they won't come loose or short things out. Safety matters. klc Title: Re: Meets Code (yeah right!) :-) Post by: steve_qix on April 08, 2018, 09:26:57 PM The only problem I see it that it seems that the isolation bar of the left switch is reversed and should be mechanically linked to the right switch...The rest is ok ;D Ah, very observant ;) The right switch switches between 240V (up) and 120V (down). The left switch selects between direct to the power source (up) and using the Variac (down). Title: Re: Meets Code (yeah right!) :-) Post by: WD5JKO on April 08, 2018, 11:09:00 PM I was at a fellow ham QTH last month. Same thing; 230v cheater cord with alligator clips to a power cord! I objected and he finally put insulation over the gators. Jim Wd5JKO Title: Re: Meets Code (yeah right!) :-) Post by: WD8KDG on April 09, 2018, 08:18:50 AM How much are you asking for the bridge? ;D
Craig, Title: Re: Meets Code (yeah right!) :-) Post by: Todd, KA1KAQ on April 09, 2018, 09:28:32 AM I dunno, Steve - even the QIX Memorial Clip Lead Museum has a ways to go to beat this guy.
Adds a whole new meaning to the phrase "I just threw this together on the bench".... Title: Re: Meets Code (yeah right!) :-) Post by: KD6VXI on April 09, 2018, 10:14:07 AM Some nice inductors in that pic.
I'm confused though. Wouldn't it make more sense to hang the tubes in the window, rather than that huge inductor? I mean, air cooling that inductor seems unnecessary. The tubes, though. At least he's got them mounted up high where the air is stale and at its hottest temp! --Shane KD6VXI Title: Re: Meets Code (yeah right!) :-) Post by: w1vtp on April 13, 2018, 10:39:48 AM I was there. The clip lead wires were BARELY warm. Attribute that the very high efficiency of the class E transmitter
Al Title: Re: Meets Code (yeah right!) :-) Post by: KA0HCP on April 14, 2018, 02:40:01 PM Yes, it meets N.E.C. (No electrical codes)! :)
Title: Re: Meets Code (yeah right!) :-) Post by: W1DAN on April 15, 2018, 06:53:56 PM Radio Shack leads?
Those could have been used as a "soft start" circuit! ;-) Dan Title: Re: Meets Code (yeah right!) :-) Post by: n1ps on April 15, 2018, 07:48:47 PM First seeing the photo I thought this was the new QIX self driving car remote control.
Title: Re: Meets Code (yeah right!) :-) Post by: VE3ELQ on April 15, 2018, 08:04:36 PM John 11 : 35
Nigel Title: Re: Meets Code (yeah right!) :-) Post by: steve_qix on April 17, 2018, 08:51:44 PM Title: Re: Meets Code (yeah right!) :-) Post by: w1vtp on April 19, 2018, 04:02:31 PM There was no weeping at the QIX lab ;D Title: Re: Meets Code (yeah right!) :-) Post by: KD6VXI on May 06, 2018, 05:06:27 PM My version.
Feeding 126 into low tap, on 208. Measuring off 5 of 20 caps, so quadruple the meter reading. Then double it for the nominal 252 volts in summer. 7300 volts ought to really get a pair of 4x1s cooking! But yeah, all the interconnects meet code! Time to go buy another cutting board...... Err..... Shelf! Yes, time to go buy another shelf! --Shane KD6VXI Title: Re: Meets Code (yeah right!) :-) Post by: KD6VXI on May 06, 2018, 06:51:04 PM There. Multiplier isn't shown, but where I'm picking the voltage up is X8.
I'm Sure THIS meets code. 8.8 kv, through clip leads! Viva LA 4-1000s! --Shane KD6VXI Title: Re: Meets Code (yeah right!) :-) Post by: KB2WIG on May 06, 2018, 08:37:09 PM The wonders from Wally Mart. I like the 'ease of sliding' hand hole in the shelf..... Its a much better application than the Batwings "works in a drawer". It does look suspiciously like the center insulator of my 80m/40m "fan" dipole. klc Title: Re: Meets Code (yeah right!) :-) Post by: W1RKW on May 07, 2018, 04:56:23 PM Shane, I'm surprised you didn't fry that DMM.
Title: Re: Meets Code (yeah right!) :-) Post by: KD6VXI on May 07, 2018, 06:05:36 PM It's rated to 1kv. AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
I did fry the same model a week before. Hit the variac switch and had 60 volts or so into the primary of a 4.4kv xformer. So, about 2kv.... Thank gosh they are only 30 bucks! Compare within 2 pct of my 600 dollar fluke. And read to 200 uF and 30 mhz --Shane KD6VXI |