Date   

Re: Bayou Jumper Price

David Walker
 


On 7/25/2021 11:29 AM, Johnny AC0BQ wrote:
Gm David
You may be looking at a old copy of the 
Souper upper page.

I just looked at the Bayou Jumper page and it shows $98.30.
It’s the same price as last time.
72
Johnny ACØBQ 

On Sun, Jul 25, 2021 at 11:25 AM David Walker <aa9uc@...> wrote:

The Bayou Jumper page indicates the cost of the kit is $30.00. As much as I wish it was true, I know it must be a typo.

Thanks for all the great kits. I own and have built several.

AA9UC


"Ordering Information:
The cost of this kit is $30 plus shipping. The drop down menu items below include shipping costs.
DX Buyers - DX shipping has become extremely volatile with extended delivery items and lost shipments. We have suspended all non-US orders as a result."


--
Check out the 4SQRP website at 4sqrp.com


Re: Bayou Jumper Price

Johnny AC0BQ
 

Gm David
You may be looking at a old copy of the 
Souper upper page.

I just looked at the Bayou Jumper page and it shows $98.30.
It’s the same price as last time.
72
Johnny ACØBQ 

On Sun, Jul 25, 2021 at 11:25 AM David Walker <aa9uc@...> wrote:

The Bayou Jumper page indicates the cost of the kit is $30.00. As much as I wish it was true, I know it must be a typo.

Thanks for all the great kits. I own and have built several.

AA9UC


"Ordering Information:
The cost of this kit is $30 plus shipping. The drop down menu items below include shipping costs.
DX Buyers - DX shipping has become extremely volatile with extended delivery items and lost shipments. We have suspended all non-US orders as a result."


--
Check out the 4SQRP website at 4sqrp.com


Bayou Jumper Price

David Walker
 

The Bayou Jumper page indicates the cost of the kit is $30.00. As much as I wish it was true, I know it must be a typo.

Thanks for all the great kits. I own and have built several.

AA9UC


"Ordering Information:
The cost of this kit is $30 plus shipping. The drop down menu items below include shipping costs.
DX Buyers - DX shipping has become extremely volatile with extended delivery items and lost shipments. We have suspended all non-US orders as a result."



Re: Bayou Jumper kit back in stock!

Johnny AC0BQ
 

Gm Lee 
I’m glad your excited about these little kits.
They are a lot of fun to build as well.
This one has a different color favs plate and a keying transistor that will allow you to use a keyer.
72
ACØBQ 

On Sun, Jul 25, 2021 at 11:15 AM Lee Bahr <leebahr@...> wrote:
I was up late last night and saw the order desk was again opened for the
Bayou Jumper.  I never thought I would want one until they were no
longer available!  My friend Curt, KB5JO got an early one and really
likes it.  He got interested in Super Regenerative receivers and built a
tube type regenerative receiver which has no front end. Of course the
antenna swinging in the wind, made it unstable for regeneration.  Then
he purchased the Bayou Jumper and it does have a front end.  With it he
finds the receiver very stable and an antenna swinging in the wind has
no effect on the Bayou Jumper's regenerative setting.  He tells me the
Bayou Jumper Regenerative Receiver with a Front End works great with
it.  Of course a Regenerative Receiver also has great sensitivity and
some good selectivity too.  So I am now HOOKED!
Lee, w0vt





--
Check out the 4SQRP website at 4sqrp.com


Bayou Jumper kit back in stock!

Lee Bahr
 

I was up late last night and saw the order desk was again opened for the Bayou Jumper.  I never thought I would want one until they were no longer available!  My friend Curt, KB5JO got an early one and really likes it.  He got interested in Super Regenerative receivers and built a tube type regenerative receiver which has no front end. Of course the antenna swinging in the wind, made it unstable for regeneration.  Then he purchased the Bayou Jumper and it does have a front end.  With it he finds the receiver very stable and an antenna swinging in the wind has no effect on the Bayou Jumper's regenerative setting.  He tells me the Bayou Jumper Regenerative Receiver with a Front End works great with it.  Of course a Regenerative Receiver also has great sensitivity and some good selectivity too.  So I am now HOOKED!
Lee, w0vt


Bayou Jumper kit back in stock!

Johnny AC0BQ
 

Ge group 
I am pleased to announce that the latest version of the Bayou Jumper is 
Transceiver kit is back in stock.

While everything around us keeps rising in price, we have been able to 
hold the line on this kit, and we are offering it at the same price it was almost a year ago.

This version has a new vibrant Red face plate as well as some part updates that will allow the use of a low current external  keyer.

Many thanks goes out to the great group of volunteers that have pulled this kit together!!

You can find this kit at :
Have a great weekend,
72
Johnny ACØBQ 



--
Check out the 4SQRP website at 4sqrp.com


Re: Coil forms, Q, and instruments

davemrtn
 

Thanks for all the info Jim.


David Martin - NA1MH - Mountain Home, Ar. -----------------------------------------
Wherever I go, there He is.


On 7/24/2021 6:19 AM, Jim Sheldon wrote:
Dave,
I'm using PLA2 or PLA+ both which are much easier to print with than PETG or ABS and are virtually NON-Toxic (ABS sure isn't).  I have found that the PLA2 and PLA+ both last quite well outdoors, even in sunlight as I have a bunch of garden characters that have been out in the sun, rain, snow and all sorts of other weather for over 2 years with very little degradation, mainly only a slight fading of the colors.  

These antenna coil forms and insulators are designed for temporary portable antenna use and not really intended for permanent outdoor installs anyway, but I do intend to put one up in a semi-permanent install here at the house, just to test outdoor longevity.

I used FilaCube "Mint Blue" PLA2 for the ones in the pictures.  The tolerances on the coil inserts are pretty tight so not sure how PETG or ABS would print - each persons printers tend to print a bit different depending on machine tolerances and personal print profiles.  I won't publish my print profiles as I'm using Creality CR10V2 printers and most people out there are using something else.  There are two versions of the coil form, one with no "No Twist" inserts and one without that will be in the STL file when I get it ready for posting later today as well.  The one without the inserts is for use in "Tank" coils, etc.   It was an original experiment just to give more defined grooves for the coil than the one that Jim G. came up with using TinkerCad and through a sheer stroke of luck, wound with 16 turns of #20 it came out almost dead on the 4.7uH necessary for a 20 meter trap coil - I did not plan it that way - LOL.

Jim

------ Original Message ------
From: "davemrtn" <davemrtn@...>
Sent: 7/23/2021 8:17:58 PM
Subject: Re: [4SQRP] Coil forms, Q, and instruments

Jim, what material are you printing with, PETG ???

I wouldn't use PLA, but ABS would last longer than PLA, but I think PETG might last the longest ??


David Martin - NA1MH - Mountain Home, Ar. -----------------------------------------
Wherever I go, there He is.


On 7/23/2021 8:01 PM, Jim Sheldon wrote:
Jim G's work inspired me to work on a 40/20 meter trap doublet/dipole/inverted vee with 3D printed trap coil forms and insulators.  I have the traps coil forms done and the end/trap center insulators done and I really got lucky.  A 20 meter trap should have 4.7 uH worth of inductance with a 27pF capacitor to resonate at 14.100 MHz and TOTALLY by accident, my initial print of the coil form wound with 16 turns of #20 wire just so happened to come out to just a bit over 4.7uH when I measured it.

I worked on the design (I used AudoDesk's (free for personal/non-commercial use) Fusion 360 as my CAD program.  F360 gives a bit more finesse when making threaded cylinders than TinkerCad does. 

Taking Jim's advice, I also added blockers to the inside of the coil form so the insulator will slide tightly inside and allow you to wind the coil first and pick which 90 degree point gives you the best coil positioning.

Here's a couple of pictures of the lot.

Jim Sheldon, W0EB  -- 3D printing is a super 2nd hobby to HamRadio --









Re: 40/20 meter trap dipole Coil Forms & insulators

davemrtn
 

Jim, Thanks.

I was able to open all the F360 files.


David Martin - NA1MH - Mountain Home, Ar. -----------------------------------------
Wherever I go, there He is.


On 7/24/2021 11:04 AM, Jim Sheldon wrote:
As promised, here is a ZIP file of the Fusion 360 design files and the .stl. 3D printable files for the 40/80 trap dipole end/trap insulators, trap coil forms (Wind with 15 turns of #20 enameled wire) and the parallel capacitor should be a 1KV Mica cap of 27 pF -- Look up the wire lengths for the antenna as it will vary for each individual's chosen frequency so not indicating it here.  Obviously will require pruning anyway as nobody has the same conditions for their installation. 

This is designed primarily as a portable dipole/doublet/inverted Vee to take on SOTA, POTA and other outings but depending on the material you print it with, it could have use in semi-permanent installations. 

Rudimentary printing instructions are contained in a text file within the ZIP archive.

Jim Sheldon, W0EB


Re: 40/20 meter trap dipole Coil Forms & insulators

Jim Sheldon
 

Some pictures of the center insulators - one for an SO-239 and one for a BNC connector.  The blue one is for the SO-239 and the grey one is for the BNC.  It was quicker to print them both at the same time (different printers) so I could get the corrected files tested and posted.

Jim, W0EB



Re: 40/20 meter trap dipole Coil Forms & insulators

Jim Sheldon
 

Please disregard the Zip file in the original post.  There are 2 problematical errors in the Center Insulators.  The SO-239 mounting holes are too far apart and the BNC mounting hole is too small in diameter.

Those files have been corrected and the ones in the attached ZIP archive are now correct.  Please use this one and not the first one.

Thanks,

Jim Sheldon, W0EB


3D Print Roller Inductor... perhaps not.... but ...

Jim, N5IB
 

Jerry commented yesterday, "Does anyone see a roller inductor in the making???"

That's most likely well beyond my 3D skillset, and making the reliable moving contacts would be a real challenge.

But a continuously variable inductance is a real plus in impedance matching networks.
And for some configurations that have a single LC pair that produces a match, it's essential.
The "Differential T" is one of those.
Always wanted to make one with more QRP-friendly dimensions than the big MFJ version.
Linking two common variable caps with 3D printed gears to make them act as a differential should not be hard.

And, recall that it's possible to change the effective inductance of a coil by introducing material into the interior of the winding.
If it's ferromagnetic, like iron powder or ferrite, the inductance increases. If is non-ferrous, like brass or aluminum, the inductance decreases.
Think of the PTO (permeability tuned oscillator) devices that have been popular, like TenTec's rigs and Steve Weber's MMR40 transceiver.

So I have an experiment under way to try to create a "PTI" (permeability tuned Inductor).
I'm 3D printing a coil form with an inner cylinder that will hold a length of 3/8" diameter aluminum rod, able to slide in and out of the coil.
Alternatively a ferrite rod, or an iron powder "rod" made by stacking several toroid cores. We'll see what kind of inductance range is achievable. It will also be necessary to investigate the losses. I seem to recall an article quite a few years back that implied the non-ferrous insert acted like shorted turns and did not impact the Q.

In fact I'm almost certain there was an article in one of the ham mags a ways back about an antenna matcher that used this very principle.

I like to invite folks who are so inclined and have the tools to join in this experimentation - we might come up with a nifty doodad.

Jim, N5IB


40/20 meter trap dipole Coil Forms & insulators

Jim Sheldon
 

As promised, here is a ZIP file of the Fusion 360 design files and the .stl. 3D printable files for the 40/80 trap dipole end/trap insulators, trap coil forms (Wind with 15 turns of #20 enameled wire) and the parallel capacitor should be a 1KV Mica cap of 27 pF -- Look up the wire lengths for the antenna as it will vary for each individual's chosen frequency so not indicating it here.  Obviously will require pruning anyway as nobody has the same conditions for their installation. 

This is designed primarily as a portable dipole/doublet/inverted Vee to take on SOTA, POTA and other outings but depending on the material you print it with, it could have use in semi-permanent installations. 

Rudimentary printing instructions are contained in a text file within the ZIP archive.

Jim Sheldon, W0EB


Re: Coil forms, Q, and instruments

Jim Sheldon
 

Dave,
I'm using PLA2 or PLA+ both which are much easier to print with than PETG or ABS and are virtually NON-Toxic (ABS sure isn't).  I have found that the PLA2 and PLA+ both last quite well outdoors, even in sunlight as I have a bunch of garden characters that have been out in the sun, rain, snow and all sorts of other weather for over 2 years with very little degradation, mainly only a slight fading of the colors.  

These antenna coil forms and insulators are designed for temporary portable antenna use and not really intended for permanent outdoor installs anyway, but I do intend to put one up in a semi-permanent install here at the house, just to test outdoor longevity.

I used FilaCube "Mint Blue" PLA2 for the ones in the pictures.  The tolerances on the coil inserts are pretty tight so not sure how PETG or ABS would print - each persons printers tend to print a bit different depending on machine tolerances and personal print profiles.  I won't publish my print profiles as I'm using Creality CR10V2 printers and most people out there are using something else.  There are two versions of the coil form, one with no "No Twist" inserts and one without that will be in the STL file when I get it ready for posting later today as well.  The one without the inserts is for use in "Tank" coils, etc.   It was an original experiment just to give more defined grooves for the coil than the one that Jim G. came up with using TinkerCad and through a sheer stroke of luck, wound with 16 turns of #20 it came out almost dead on the 4.7uH necessary for a 20 meter trap coil - I did not plan it that way - LOL.

Jim

------ Original Message ------
From: "davemrtn" <davemrtn@...>
Sent: 7/23/2021 8:17:58 PM
Subject: Re: [4SQRP] Coil forms, Q, and instruments

Jim, what material are you printing with, PETG ???

I wouldn't use PLA, but ABS would last longer than PLA, but I think PETG might last the longest ??


David Martin - NA1MH - Mountain Home, Ar. -----------------------------------------
Wherever I go, there He is.


On 7/23/2021 8:01 PM, Jim Sheldon wrote:
Jim G's work inspired me to work on a 40/20 meter trap doublet/dipole/inverted vee with 3D printed trap coil forms and insulators.  I have the traps coil forms done and the end/trap center insulators done and I really got lucky.  A 20 meter trap should have 4.7 uH worth of inductance with a 27pF capacitor to resonate at 14.100 MHz and TOTALLY by accident, my initial print of the coil form wound with 16 turns of #20 wire just so happened to come out to just a bit over 4.7uH when I measured it.

I worked on the design (I used AudoDesk's (free for personal/non-commercial use) Fusion 360 as my CAD program.  F360 gives a bit more finesse when making threaded cylinders than TinkerCad does. 

Taking Jim's advice, I also added blockers to the inside of the coil form so the insulator will slide tightly inside and allow you to wind the coil first and pick which 90 degree point gives you the best coil positioning.

Here's a couple of pictures of the lot.

Jim Sheldon, W0EB  -- 3D printing is a super 2nd hobby to HamRadio --









Re: Coil forms, Q, and instruments

Jim Sheldon
 

Do a google search on Fusion 360 for personal use and you should find their newer instructions.

------ Original Message ------
From: "davemrtn" <davemrtn@...>
Sent: 7/23/2021 8:13:59 PM
Subject: Re: [4SQRP] Coil forms, Q, and instruments

Jim,  I had the original hobbyist version and Autodesk said my "free trial" was over !

I tried to sign up again for hobbyist license and couldn't find a means to do it.

Points would be appreciated.

In the mean time, I am getting better at using FreeCad.


David Martin - NA1MH - Mountain Home, Ar. -----------------------------------------
Wherever I go, there He is.


On 7/23/2021 4:41 PM, Jim Sheldon wrote:
Dave,
Suggest you check again, Fusion 360 is still free for personal/non commercial use.  I have been using F360 for 3 years now, legally licensed for personal use and have not had to pay a penny for it.

Jim, W0EB


On Jul 23, 2021, at 4:37 PM, davemrtn <davemrtn@...> wrote:



FreeCad is not as intuitive as AutoDesk Fusion 360, but I am unwilling to pay their exorbitant price for hobby use.

I have been designing things with FreeCad [on and off] for several months and becoming more comfortable using, not proficient, but very comfortable.

It does have a few quirks (bugs) you will discover along the way but nothing you won't find a work around for.

It is a bargain at 2 or 3 times the price !


David Martin - NA1MH - Mountain Home, Ar. -----------------------------------------
Wherever I go, there He is.


On 7/23/2021 1:42 PM, WA4EFS wrote:
Hello Jim. Very nice work on the coil form. I test printed your .stl file and it came out perfectly.

If you don't mind my asking which CAD application do you use?  Some time ago I attempted a similar project in FreeCAD. However, I encountered difficulties and set it aside.

73, -Lloyd (wa4efs)

-----Original Message-----
From: main@4SQRP.groups.io [mailto:main@4SQRP.groups.io] On Behalf Of Jim, N5IB
Sent: Friday, July 23, 2021 8:50 AM
To: main@4SQRP.groups.io
Subject: Re: [4SQRP] Coil forms, Q, and instruments

Hi David,

Here's the STL file, attached, and a photo.
It's such a thin tube it needs a "brim" for buildplate adhesion

There's a tiny hole at each end to pass the wire through to secure the turns.
I plan to make another with multiple holes to accommodate different turn counts.

Jim, N5IB












Re: Coil forms, Q, and instruments

davemrtn
 

Jim, what material are you printing with, PETG ???

I wouldn't use PLA, but ABS would last longer than PLA, but I think PETG might last the longest ??


David Martin - NA1MH - Mountain Home, Ar. -----------------------------------------
Wherever I go, there He is.


On 7/23/2021 8:01 PM, Jim Sheldon wrote:
Jim G's work inspired me to work on a 40/20 meter trap doublet/dipole/inverted vee with 3D printed trap coil forms and insulators.  I have the traps coil forms done and the end/trap center insulators done and I really got lucky.  A 20 meter trap should have 4.7 uH worth of inductance with a 27pF capacitor to resonate at 14.100 MHz and TOTALLY by accident, my initial print of the coil form wound with 16 turns of #20 wire just so happened to come out to just a bit over 4.7uH when I measured it.

I worked on the design (I used AudoDesk's (free for personal/non-commercial use) Fusion 360 as my CAD program.  F360 gives a bit more finesse when making threaded cylinders than TinkerCad does. 

Taking Jim's advice, I also added blockers to the inside of the coil form so the insulator will slide tightly inside and allow you to wind the coil first and pick which 90 degree point gives you the best coil positioning.

Here's a couple of pictures of the lot.

Jim Sheldon, W0EB  -- 3D printing is a super 2nd hobby to HamRadio --









Re: Coil forms, Q, and instruments

davemrtn
 

Jim,  I had the original hobbyist version and Autodesk said my "free trial" was over !

I tried to sign up again for hobbyist license and couldn't find a means to do it.

Points would be appreciated.

In the mean time, I am getting better at using FreeCad.


David Martin - NA1MH - Mountain Home, Ar. -----------------------------------------
Wherever I go, there He is.


On 7/23/2021 4:41 PM, Jim Sheldon wrote:
Dave,
Suggest you check again, Fusion 360 is still free for personal/non commercial use.  I have been using F360 for 3 years now, legally licensed for personal use and have not had to pay a penny for it.

Jim, W0EB


On Jul 23, 2021, at 4:37 PM, davemrtn <davemrtn@...> wrote:



FreeCad is not as intuitive as AutoDesk Fusion 360, but I am unwilling to pay their exorbitant price for hobby use.

I have been designing things with FreeCad [on and off] for several months and becoming more comfortable using, not proficient, but very comfortable.

It does have a few quirks (bugs) you will discover along the way but nothing you won't find a work around for.

It is a bargain at 2 or 3 times the price !


David Martin - NA1MH - Mountain Home, Ar. -----------------------------------------
Wherever I go, there He is.


On 7/23/2021 1:42 PM, WA4EFS wrote:
Hello Jim. Very nice work on the coil form. I test printed your .stl file and it came out perfectly.

If you don't mind my asking which CAD application do you use?  Some time ago I attempted a similar project in FreeCAD. However, I encountered difficulties and set it aside.

73, -Lloyd (wa4efs)

-----Original Message-----
From: main@4SQRP.groups.io [mailto:main@4SQRP.groups.io] On Behalf Of Jim, N5IB
Sent: Friday, July 23, 2021 8:50 AM
To: main@4SQRP.groups.io
Subject: Re: [4SQRP] Coil forms, Q, and instruments

Hi David,

Here's the STL file, attached, and a photo.
It's such a thin tube it needs a "brim" for buildplate adhesion

There's a tiny hole at each end to pass the wire through to secure the turns.
I plan to make another with multiple holes to accommodate different turn counts.

Jim, N5IB












Re: Coil forms, Q, and instruments

Jim Sheldon
 

I will Joe.  I have a couple more things before I post the complete package.  I still need to design a center insulator to take a BNC connector and one to take an SO-239 before I post the files.

I’ll work on those tomorrow after breakfast and hopefully have a zipfile with all the .stl and I’ll include the .f3d files for those who can use them.

Jim


On Jul 23, 2021, at 8:53 PM, cornhusker via groups.io <cornhusker@...> wrote:

I hope you can post the STL files!   This looks great!
73 de K0NEB 



On Fri, Jul 23, 2021 at 8:01 PM, Jim Sheldon
<w0eb@...> wrote:
Jim G's work inspired me to work on a 40/20 meter trap doublet/dipole/inverted vee with 3D printed trap coil forms and insulators.  I have the traps coil forms done and the end/trap center insulators done and I really got lucky.  A 20 meter trap should have 4.7 uH worth of inductance with a 27pF capacitor to resonate at 14.100 MHz and TOTALLY by accident, my initial print of the coil form wound with 16 turns of #20 wire just so happened to come out to just a bit over 4.7uH when I measured it.

I worked on the design (I used AudoDesk's (free for personal/non-commercial use) Fusion 360 as my CAD program.  F360 gives a bit more finesse when making threaded cylinders than TinkerCad does. 

Taking Jim's advice, I also added blockers to the inside of the coil form so the insulator will slide tightly inside and allow you to wind the coil first and pick which 90 degree point gives you the best coil positioning.

Here's a couple of pictures of the lot.

Jim Sheldon, W0EB  -- 3D printing is a super 2nd hobby to HamRadio --

<Img_7973.jpg>


<Img_7974.jpg>


<Img_7976.jpg>



<Img_7973.jpg>
<Img_7974.jpg>
<Img_7976.jpg>


Re: Coil forms, Q, and instruments

cornhusker
 

I hope you can post the STL files!   This looks great!
73 de K0NEB 



On Fri, Jul 23, 2021 at 8:01 PM, Jim Sheldon
<w0eb@...> wrote:
Jim G's work inspired me to work on a 40/20 meter trap doublet/dipole/inverted vee with 3D printed trap coil forms and insulators.  I have the traps coil forms done and the end/trap center insulators done and I really got lucky.  A 20 meter trap should have 4.7 uH worth of inductance with a 27pF capacitor to resonate at 14.100 MHz and TOTALLY by accident, my initial print of the coil form wound with 16 turns of #20 wire just so happened to come out to just a bit over 4.7uH when I measured it.

I worked on the design (I used AudoDesk's (free for personal/non-commercial use) Fusion 360 as my CAD program.  F360 gives a bit more finesse when making threaded cylinders than TinkerCad does. 

Taking Jim's advice, I also added blockers to the inside of the coil form so the insulator will slide tightly inside and allow you to wind the coil first and pick which 90 degree point gives you the best coil positioning.

Here's a couple of pictures of the lot.

Jim Sheldon, W0EB  -- 3D printing is a super 2nd hobby to HamRadio --









Re: Coil forms, Q, and instruments

Jim Sheldon
 

Jim G's work inspired me to work on a 40/20 meter trap doublet/dipole/inverted vee with 3D printed trap coil forms and insulators.  I have the traps coil forms done and the end/trap center insulators done and I really got lucky.  A 20 meter trap should have 4.7 uH worth of inductance with a 27pF capacitor to resonate at 14.100 MHz and TOTALLY by accident, my initial print of the coil form wound with 16 turns of #20 wire just so happened to come out to just a bit over 4.7uH when I measured it.

I worked on the design (I used AudoDesk's (free for personal/non-commercial use) Fusion 360 as my CAD program.  F360 gives a bit more finesse when making threaded cylinders than TinkerCad does. 

Taking Jim's advice, I also added blockers to the inside of the coil form so the insulator will slide tightly inside and allow you to wind the coil first and pick which 90 degree point gives you the best coil positioning.

Here's a couple of pictures of the lot.

Jim Sheldon, W0EB  -- 3D printing is a super 2nd hobby to HamRadio --









Re: Coil forms, Q, and instruments

Jim, N5IB
 

Hi Lloyd,

I'm CPU limited and can't run the better CAD packages like Fusion360.
So I've been using TinkerCad on-line, and it's been sufficient for most things I've needed.
With Ultimaker Cura 4.6.2 as the slicer

One day, with a better CPU, I'll move up.

Jim, N5IB

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