New Delta Loop for Home QTH

-

 I've been having a lot of fun and success in the POTA program that I realized my OCF dipole at home is just not cutting it.  Not only is the noise level too high on 20m for any SSB contacts,  the performance of my ground mounted WRC out in the field  really has me spoiled for a better performing antenna that is suitable for my home QTH where I am limited to CW (and more and more rarely digital modes) most days and I rarely get good SSB contacts at home.

I've been in touch with Art M0PLK to get a kit of parts of build a new multi-band Delta Loop antenna to replace the OCF dipole I've relied on for the past year.   Reviews on eHam are pretty consistent in  reporting that this a great loop antenna for compromised spaces, and much quieter than a dipole.  Downside is that its not-resonant on any and requires a tuner for reasonable performance.  I've ordered a Palstar AT2DK tuner for my shack.  Delivery time is 4-6 weeks per HRO.

Materials are scarce in UK due to Brexit, so Art is willing to ship me the kit of parts without the aluminum elements.  This will save a lot of money on overseas shipping and will give me a chance to design the delta loop elements to fit my needs.  I might even due a "stacked" 2L delta loop?

To be supplied by Art:

-aluminum caps for a top bit to attach wires. 

-CNC cut base plate with all necessary hardware. 

I would need to source the telescopic aluminum elements (190cm each at 25mm, 20mm and 16mm, with 2mm wall) to build each arm of the delta loop.

Resources:

M0PLK Field Report:

SP9WOL Variant for 20M:  


Telescopic Tubing Sources:

https://alcobrametals.com/telescopic-tubing/aluminum-telescoping-round-tubing/

https://www.wellste.com/extruded-aluminum-tube/





Comments

Post a Comment

Popular posts from this blog

Remote CW with RKI 1.05 and Sparkfun FT231X breakout board

-
Image
I've created a workable solution for sending CW via a "straight key" to my remote Flexradio 6600 at the lake using RemoteKeyerInterface (RKI) and a simple Serial/USB circuit.   RKI is only available for Windows. RKI enables you to use paddles or a straight key to send CW through a remote Flex‑6000 transceiver.  After several iterations I've settled on a design using the Sparkfun FT-231x breakout board and RKI v1.05 that was originally posted by Gary KT7AZ on the RKI  groups.io forum .   However, to send CW reliably via a straight key - there were two main problems I had to solve. First,  I had to resolve the network latency and buffer bloat in my shack's network by setting up a router with Smart Queue Management.   The Ubiquity EdgeRouter  was recommended by a friend of mine (Larry N1FG) and has been working great.  I'm using the 4 port Edgerouter X which was only $50 at microcenter (open box special).  No more audio stuttering or dropped packets, which kills
Read more

BENS BEST BENT WIRE

-
Image
Update 11/19/23 - Tribute for Bill Crane, SK 10/26/23: https://youtu.be/Znyqq9f93r0?si=bxPV0zVmGN7oWo_u ++ Update August 22, 2022.   I was able to find Bill Crane W9ZN on the air by looking for his spots on RBN .   Took me a while to see the pattern on when and where he's be on frequency, but not only did we make the QSO, we exchanged cards as well!  This is one of my favorite QSL cards that I've collected so far.  Thank You Bill!     73 Chris de WX7V ==================================== Last month I asked a members of the Straight Key Century Club  what was their favorite way to warm up before sending morse code.  I got a lot of input - from, "Just jump right in" to sending the Alphabet and the Numbers 0-9.   My favorite answer is to practice sending Bens Best Bent Wire, with the letters and numbers run together so that the code produced sounds similar to a march.  Apparently this was taught by the RAF,  merchant marines, and subsequently used by many commercial CW o
Read more

Wolf River Coil SB 1000 Platinum - 213" Whip Antenna Tuning Guide W0DHZ - Dale Henninger

-
Image
 Love my Wolf Rive Coil Antenna for POTA use but I haven’t marked it up (yet) to facilitate quick band changes while out in the field.   Here are some notes to use as a starting point based on the work by W0DHZ Dale Henninger: 102″ Telescoping Whip Band Whip Length Coil Position 6m Only 1st section of whip extended No Clicks – Top of Coil 10m 3 sections out + 6″ of 4th section No Clicks – Top of Coil 40m All sections out 3 Fingers Down 213″ Telescoping Whip Band Whip Length Coil Position 10m 8 sections out + 1″ of 9th section No Clicks – Top of Coil 20m 9 sections out + 13″ of 10th section No Clicks – Top of Coil 40m All sections extended 16 clicks down Reminder to subtract the length of the Wolf River Coils SB-1000 coil from the 1/4 Wave lengths above. http://www.w0dhz.com/wp-content/uploads/2021/08/WolfRiver-SB1000-213inWhip-Tuning-Spreadsheet.pdf
Read more