Warning: Creating default object from empty value in /homepages/11/d132647312/htdocs/Amfone/mkportal/include/SMF/smf_out.php on line 47
Meets Code (yeah right!) :-)




 
The AM Forum
December 09, 2018, 07:38:31 PM *
Welcome, Guest. Please login or register.

Login with username, password and session length
 
   Home   Help Calendar Links Staff List Gallery Login Register  
Pages: [1]   Go Down
  Print  
Author Topic: Meets Code (yeah right!) :-)  (Read 2298 times)
0 Members and 1 Guest are viewing this topic.
steve_qix
Contributing
Member
*
Offline Offline

Posts: 2386


Bap!


WWW
« 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.  Grin  (and if you believe THAT one, I've got a bridge for sale over in NY).


Logged

High Power, Broadcast Audio and Low Cost?  Check out the class E web site at: http://www.classeradio.org
PA0NVD
Member

Offline Offline

Posts: 403


Nico and Chappie (Chappie is the dog...)


« Reply #1 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  Grin
Logged
KB2WIG
Contributing
Member
*
Offline Offline

Posts: 4241



« Reply #2 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
Logged

What? Me worry?
steve_qix
Contributing
Member
*
Offline Offline

Posts: 2386


Bap!


WWW
« Reply #3 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  Grin

Ah, very observant  Wink  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).
Logged

High Power, Broadcast Audio and Low Cost?  Check out the class E web site at: http://www.classeradio.org
WD5JKO
Member

Offline Offline

Posts: 1731


WD5JKO


« Reply #4 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


* careful_Guys.jpg (24.65 KB, 428x363 - viewed 100 times.)
Logged
WD8KDG
Member

Offline Offline

Posts: 234



« Reply #5 on: April 09, 2018, 08:18:50 AM »

How much are you asking for the bridge?  Grin

Craig,
Logged

Ham radio is now like the surprise in a box of "Cracker-Jacks". There is a new source of RFI every day.
Todd, KA1KAQ
Administrator
Member

Offline Offline

Posts: 4228


AMbassador


« Reply #6 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"....


* K4UXK.JPG (406.47 KB, 1600x1200 - viewed 244 times.)
Logged

known as The Voice of Vermont in a previous life
KD6VXI
Contributing
Member
*
Offline Offline

Posts: 1890


Making AM GREAT Again!


« Reply #7 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
Logged
w1vtp
Member

Offline Offline

Posts: 2611



« Reply #8 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
Logged
kb4qaa
Contributing
Member
*
Offline Offline

Posts: 1111



« Reply #9 on: April 14, 2018, 02:40:01 PM »

Yes, it meets N.E.C. (No electrical codes)!  Smiley
Logged
W1DAN
Contributing
Member
*
Offline Offline

Posts: 825



« Reply #10 on: April 15, 2018, 06:53:56 PM »

Radio Shack leads?

Those could have been used as a "soft start" circuit! ;-)

Dan
Logged
n1ps
Contributing
Member
*
Offline Offline

Posts: 274


Zorch!


« Reply #11 on: April 15, 2018, 07:48:47 PM »

First seeing the photo I thought this was the new QIX self driving car remote control.
Logged
VE3ELQ
Contributing
Member
*
Offline Offline

Posts: 229


« Reply #12 on: April 15, 2018, 08:04:36 PM »

John 11 : 35

Nigel
Logged

A "Tube Free" zone.
steve_qix
Contributing
Member
*
Offline Offline

Posts: 2386


Bap!


WWW
« Reply #13 on: April 17, 2018, 08:51:44 PM »

John 11 : 35

Nigel

Shortest verse in the Bible  Smiley
Logged

High Power, Broadcast Audio and Low Cost?  Check out the class E web site at: http://www.classeradio.org
w1vtp
Member

Offline Offline

Posts: 2611



« Reply #14 on: April 19, 2018, 04:02:31 PM »

John 11 : 35

Nigel

Shortest verse in the Bible  Smiley

There was no weeping at the QIX lab   Grin
Logged
KD6VXI
Contributing
Member
*
Offline Offline

Posts: 1890


Making AM GREAT Again!


« Reply #15 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


* IMG_20180506_135729.jpg (2440.6 KB, 2304x4096 - viewed 98 times.)
Logged
KD6VXI
Contributing
Member
*
Offline Offline

Posts: 1890


Making AM GREAT Again!


« Reply #16 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


* IMG_20180506_154037.jpg (2092.09 KB, 2304x4096 - viewed 76 times.)
Logged
KB2WIG
Contributing
Member
*
Offline Offline

Posts: 4241



« Reply #17 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
Logged

What? Me worry?
W1RKW
Contributing
Member
*
Offline Offline

Posts: 4092



« Reply #18 on: May 07, 2018, 04:56:23 PM »

Shane, I'm surprised you didn't fry that DMM. 
Logged

Bob
W1RKW
Home of GORT. A buddy of mine named the 813 rig GORT.
His fear was when I turned it on for the first time life on earth would come to a stand still.
KD6VXI
Contributing
Member
*
Offline Offline

Posts: 1890


Making AM GREAT Again!


« Reply #19 on: May 07, 2018, 06:05:36 PM »

It's rated to 1kv.

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
Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
 AMfone 2001-2015
Powered by SMF 1.1.21 | SMF © 2015, Simple Machines
Page created in 0.103 seconds with 19 queries.