Best laid plans, or the worlds second best radiating dummy load

[kopcicle]

https://www.jeff bezos.com/gp/product/B07L8R4SMG/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1
https://www.jeff bezos.com/gp/product/B07L8R4SMG/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1

jeff bezos because I STILL CAN'T PUT "AMAZON" IN A LINK WITHOUT FORUM SOFTWARE THINKING IT'S [MEDIA] IT HAS TO BE A SIMPLE FIX SO JUST FIX IT !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Just replace jeff bezos with amazon.
Okay , rant over ....
https://kitsandparts.com/store2.php
https://www.mscdirect.com/product/details/48703243?rItem=48703243

By the numbers

Previous burned up attempt

More arcing , sorry about the pics

The 40oz devil spawn feline assisting in the balun winding

Yup, junk

Not only was the calibration off a bit but the same cell phone camera with cataracts.
The yellow trace (VSWR) has two noticeable dips in that 50KHz to 60MHz span.
7.244 MHz and 52.4 MHz.


...missed it by that much.

 

[543_Dallas]

My last arc was between two inductors made of 3/8 tubing. It jumped through about a half inch of plexiglass and left some nice soot splatter on the inductors. I asked the wife if she wanted to look out for fireworks while I fired up the transmitter. She didn't and really missed a good show. My spark gap transmitter was on 3885 and could be heard on the 2m rig.

 

[kopcicle]

Any reason why 3885 ?

 

[543_Dallas]

Any reason why 3885 ?

Yeah. I built a new tuner for 75m and 160. I was giving it a good stress test and it failed after 30 seconds. That's ok. The original caught on fire before I got the bugs worked out.

It's link coupled but in series to feed a short antenna. The coil is split in the center and I didn't have the halves far enough apart. Apparently there's a large voltage difference between them.

What's the plan for the balun?

 

[Tallman]

What function does the cat play in the circuits? Audible warning alert ?

 

[Handy Andy]

Looks like his package from Lindt came...
Sometimes it's the only way to tolerate those little...
er, Moments...​

What function does the cat play in the circuits? Audible warning alert ?

Schrödinger's Cat?​

 

[kopcicle]

What's the plan for the balun?

https://www.w8ji.com/windom_off_center_fed.htm
https://sites.google.com/view/kn9b/guanella-current-balun
same song third verse...

 

[kopcicle]

July 15, 2020, 1:00 pm
Shipment Received, Package Acceptance Pending
MCHENRY, IL 60051
Your shipment was received at 1:00 pm on July 15, 2020 in MCHENRY, IL 60051. The acceptance of your package is pending.

whatever that means

Out for Delivery 07/17/2020 8:58 A.M. Seattle, WA, United States
Out For Delivery Today

then runs around everywhere but here on the "track my delivery map" within about 4 blocks

07/17/2020 7:09 A.M. Seattle, WA, United States Loaded on Delivery Vehicle


07/17/2020 3:17 A.M. Seattle, WA, United States Destination Scan

getting closer

07/17/2020 1:48 A.M. Seattle, WA, United States Arrived at Facility


07/17/2020 1:15 A.M. Redmond, WA, United States Departed from Facility

overshoots by 25 miles


07/16/2020 8:56 P.M. Redmond, WA, United States Arrived at Facility


07/16/2020 4:58 P.M. Portland, OR, United States Departed from Facility

and

July 17, 2020
In Transit, Arriving On Time
Your package is moving within the USPS network and is on track to be delivered the expected delivery date. It is currently in transit to the next facility.
July 16, 2020, 9:58 pm
Departed USPS Regional Origin Facility
GREENVILLE SC DISTRIBUTION CENTER
July 16, 2020, 9:56 pm
Arrived at USPS Regional Origin Facility
GREENVILLE SC DISTRIBUTION CENTER
July 16, 2020, 8:41 pm
Accepted at USPS Origin Facility
GAFFNEY, SC 29341
July 16, 2020, 8:27 pm
Shipment Received, Package Acceptance Pending
GREENVILLE, SC 29607
July 16, 2020, 7:09 pm
Shipping Label Created, USPS Awaiting Item
GAFFNEY, SC 29341
July 16, 2020
Pre-Shipment Info Sent to USPS, USPS Awaiting Item

but wait there's more...

Premium Tracking
Your item is eligible for Premium Tracking: Extended History. Purchase the extended tracking history for your item to be sent via email upon request. Choose the length of time you would like to extend access to this tracking history and select for purchase. You can only purchase extended history once, so all orders are final and are not eligible for a refund. Based on your tracking number, your regular tracking history is available only until November 12, 2020 without this purchase. You may purchase Premium Tracking for only one tracking number at a time.

6 Months

$2.10

1 Year

$2.59

3 Years

$3.59

5 Years

$4.59

7 Years

$5.59

10 Years

$9.99

what the hell?

and so it goes

 

[kopcicle]

All because I can't seem to design, construct, build, follow directions, get the right materials, in order to have a 4:1 current balun.
Mod_0 : 7.244MHz & 52.40MHz with a 2.5:1 "saddle" between 14 & 28.5 MHz.
Result: arced, and well, not even close. Vinyl is not an insulator, it's a covering or coating.

Mod_1 : more of the same w/o the arcing.

Result: try again

Mod_2 : 14ga magnet wire and 4mm OD x 2mm ID teflon sheath. Same design.
Result: A biotch to wind and useful at 7.290MHz an not within 40:1 vswr anywhere.

Without the Drake MN2700B I wouldn't have HF at all. However can you imagine the return loss @ 3.825 across 150' of 9913? I don't have to :-/

Mod_3 : The above materials on verified "K" (52) 2.4" cores with (for the moment) the same design.

Right now her 33' vertical works better.

 

[Tallman]

I got the cat thing figured out it is compensating for the Mu factor, or is that mew?

 

[kopcicle]

Where's Waldo?

So after further review...

Then the coax replacement later today.

 

[blasphemy000]

Here is the best video I found to construct and test a 4:1 balun. The video says 800W, but I'm sure larger cores could be utilized for more power.


The TRX Bench channel also has 2 videos on building and testing a standard 1:1 balun. Videos #100 & #101.



And part 4 was the construction and testing of a 9:1 balun.


Tons of good info in those 4 videos. They're pretty long winded, but worth the watch.

 

[Handy Andy]

Since when have you been taking pictures of my old bench?

 

[sunbulls]

I found it easier to just buy more of what I misplaced somewhere on my bench. Eventually an accumulations saturation point is reached, and the items I’m looking for are visibly laying on the floor.

 

[Handy Andy]

It's when National Geographic shows up and wants to "Excavate" your bench for Research purposes...

The "Muffin Tin" in the shot reminded me of the times I used something similar to help with projects including making molds for spacers for some of the automotive projects I worked on.