Date   

Re: How do you test a toroid?

Stephen Roberts <steverob@...>
 

Hi Don,

Well I can't see spending $150 for an LC meter although it would be nice to have one. I'm not really a electronic tech by any means so it's really hard to justify the expense. And from a practical point of view, building one would take me forever but it certainly looks like a worthy project. In the end, I'm sure I'll just fire it up and see what happens which is my normal method of testing ;-)

73
Steve


On Mar 26, 2013, at 9:19 PM, Donald Kelly wrote:

Hi Steve,
 
I assume you know the ultimate inductance of the coil you are winding. A handy tool to have is a L/C meter.
Not all toroids are alike and it is always a good idea to measure. My guess is most of the guys have one of these.
 
 
This  meter evolved from a homebrew project by Bill Carver, W7AAZ. A digital readout was added later for easier use. The original project is classic in its simplicity.
It is also included in “Experimental Methods in RF Design” in the test gear chapter.
 
 
 
My version is used all the time. You can see the ugly style board is very simple. The trick is in the calibration steps and having a precision calibrating capacitor.
 
 
Test gear is fun to build and a great way to get started in scratch projects.
 
Don K5UOS
 
 
 
From: 4sqrp@... [mailto:4sqrp@...] On Behalf Of w1sfr
Sent: Tuesday, March 26, 2013 11:18 AM
To: 4sqrp@...
Subject: [4sqrp] How do you test a toroid?
 
 

The transforming toroids are pretty tricky to wind. Is there any way to test them to find out if you've done it correctly?

73
Steve



Re: eznec and LTspice software

Barney <barneyro@...>
 

     I did some searching and as you said the short answer is yes, but some of the discussion I saw  indicated that for each change in feedback voltage, the program would have to be ran again.  Not to mention knowing the motional parameters of any crystals in an oscillator. Which is unrelated to the regen I am playing with.

     I am totally unfamiliar with the lt spice program and I think I would have to practice a long  while to get it going, if at all, maybe.

Barney




On 3/26/2013 6:19 PM, Tom wrote:
 

Short answer is 'yes' long answer is a bit more complicated. As an example, you can model a crystal oscillator, but as all the components are "perfect" there is no noise in the resistors and transistors that in the real world is what starts the oscillation. In Spice you get around this by modeling a voltage source that induces a little kick to get things started.

A regerative receiver would be an interesting model as the feedback to start the thing is carefully controlled so as not to actually run away and turn into a full blown oscillator.

Though I haven't done so- a query on the LT Spice Yahoo Group might yield some interesting answers (as might a simple Google Search)

--- In 4sqrp@..., Barney wrote:
>
>
> Would this work for a regenerative radio?
>
> Barney
>
>



Re: Ozarkcon 2m freq? - Minds-Eye Picture

Tom Sevart <n2uhc@...>
 

Now that's funny! I do have to admit to using an HT at hamfests to
keep track of my wife but to go as far as talking across the table on
an HT? --- LOL!!!!
I haven't done that, but once I was talking to NU0Z on 2 meters while being parked next to him in a parking lot. The sad thing was that we were using a repeater about 20 miles away.

--
Tom Sevart N2UHC
St. Paul, KS


Re: eznec and LTspice software

Eric Dallmann
 

Really, you find the EZNEC manual poorly written?  I actually think Roy did an outstanding job with it (I have no financial interest in EZNEC).  Of course, I will point out that antenna modeling is a little more involved than turning on/off some combination of four burners and an oven, so the manual may not read like that of a 1950's vintage range.  If that's what you were looking for in the EZNEC manual, I can see why you were disappointed.

Eric/K9VIC


From: Phil Anderson
To: 4sqrp@...; n0evh ; WA0ITP
Cc: Phil Anderson
Sent: Monday, March 25, 2013 11:42 AM
Subject: [4sqrp] eznec and LTspice software

 
Good idea John on downloading EZNEC. It does take a bit of time to get used to the manual/instructions - and that would be true of any manuals "written" today. Manuals in general are a problem. Take my iPhone as an example, really crappy documentation. About 6 or 8 years ago I was visiting my daughter in St Louis and we were cleaning her kitchen. We really cleaned the stove top gas range only to discover the manual for it in the drawer, written in about 1950. I found that manual to be excellent, very clear on how to use it and what burner went with what knob, etc. Not so of today's ranges. When did we stop teaching writing to kids, todays designers? Maybe about 1980?
 
A second via John, consider downloading LTspice. You can download a free copy from linear technology's website. It is really super for simulating circuit. It's easy, for example, to draw the schematic for a audio phase-shift oscillator and then hit the simulation button; you can select to see the waveform generated or the frequency response of the unit. Then you can change values and play what if. Again....the manual takes some time to get used to.
 
If anyone is interested, we could get a "go-to-meeting" link set up on the WEB and I'd be happy to outline how to use the program, generating and simulating several simple circuits. Let's discuss that at Ozcon?
 
Uncle Phil 
 
 



Re: How do you test a toroid?

Donald Kelly
 

Hi Steve,

 

I assume you know the ultimate inductance of the coil you are winding. A handy tool to have is a L/C meter.

Not all toroids are alike and it is always a good idea to measure. My guess is most of the guys have one of these.

 

http://aade.com/lcmeter.htm

 

This  meter evolved from a homebrew project by Bill Carver, W7AAZ. A digital readout was added later for easier use. The original project is classic in its simplicity.

It is also included in “Experimental Methods in RF Design” in the test gear chapter.

 

http://www.qsl.net/wm5z/cq199301b.pdf

 

 

My version is used all the time. You can see the ugly style board is very simple. The trick is in the calibration steps and having a precision calibrating capacitor.

 

http://forums.qrz.com/showthread.php?238952-A-Simple-Homebrew-L-and-C-Tester

 

Test gear is fun to build and a great way to get started in scratch projects.

 

Don K5UOS

 

 

 

From: 4sqrp@... [mailto:4sqrp@...] On Behalf Of w1sfr
Sent: Tuesday, March 26, 2013 11:18 AM
To: 4sqrp@...
Subject: [4sqrp] How do you test a toroid?

 

 

The transforming toroids are pretty tricky to wind. Is there any way to test them to find out if you've done it correctly?

73
Steve


PigRig Toroid Impedances

Lee Mairs (SAG) <lmairs@...>
 

Has anybody measured the impedance of the toroids used in the PigRig? The binocular toroid is driving me crazy. I think I have it correct now, but I would sure like to verify it with an impedance reading using my inductance meter.
73 de Lee
KM4YY


Re: eznec and LTspice software

Tom Clifton
 

Short answer is 'yes' long answer is a bit more complicated. As an example, you can model a crystal oscillator, but as all the components are "perfect" there is no noise in the resistors and transistors that in the real world is what starts the oscillation. In Spice you get around this by modeling a voltage source that induces a little kick to get things started.

A regerative receiver would be an interesting model as the feedback to start the thing is carefully controlled so as not to actually run away and turn into a full blown oscillator.

Though I haven't done so- a query on the LT Spice Yahoo Group might yield some interesting answers (as might a simple Google Search)

--- In 4sqrp@yahoogroups.com, Barney <barneyro@...> wrote:


Would this work for a regenerative radio?

Barney


Re: A Good Night for Finishing Pig Rig Inventory

Charlie Vest
 


Very little to it and very easy to do as long as you go slowly and follow each instruction and looking at each picture .
 
My main problem was I was trying to look and think ahead . Went back to the basics of slow and by the book and had a nice looking one in under 10 minutes .
 
Best 73 ,
 
Charlie , W5COV

 

I have wound the small roid twice. The wires are like they are supposed to be but I am still not sure if I have "6 full turns on"
Paul N0NBD

Sent from my iPad

On Mar 26, 2013, at 1:06 PM, Joe E <cornhusker@...> wrote:

 

It took me two tries to get the small binocular toroid right too. It is a bit confusing at first but isn't too bad once you figure it out. I just have resistors in and sip pins besides the toroids.
73 de K0NEB

Sent from Yahoo! Mail on Android



From: David Martin <davemrtn@...>;
To: <4sqrp@...>; Stephen Roberts <steverob@...>;
Subject: Re: [4sqrp] Re: A Good Night for Finishing Pig Rig Inventory
Sent: Tue, Mar 26, 2013 4:33:57 PM

Yup, and if there's a hard way to do something, I'll find it.

While I was messing with my binocular toroid I thought up a 'rule of thumb' for winding one.

If you need a winding with an odd number of turns, insert the 'initial hair pin' from the opposite where the leads will be soldered. Each time the leads are wrapped through and back to the side where they'll terminate add '2' - therefore the count would be 1, 3, 5, 7, etc.

If you need an even number of turns, insert the 'initial hair pin' on the same side where the ends will terminate and then loop the ends back to that side. Again add 2 each time the leads are looped through both holes - therefore the count would be 2, 4, 6, 8, etc.


--
David Martin - K5DCM - Mountain Home Ar.



Quoting Stephen Roberts :
 

Yes, those are nasty to wind. I hope I got mine right. I guess I'll find out when I do my smoke test. BTW, is there any way to test a toroid to ensure that you got it right? Installing caps this afternoon and winding the rest of the toroids.


73
Steve
W1SFR


On Mar 26, 2013, at 11:41 AM, David Martin wrote:

Maybe I should go back and check my small binocular, I re-did my big binocular 3 times before I was satisfied I did it right.

But the first problem I had with the big binocular was I had soldered the "end" connections into the holes for the capacitors !!  After that I questioned everything I did with that big binocular.


--
David Martin - K5DCM - Mountain Home Ar.



Quoting "Lee Mairs (SAG)" :
 

The first small binocular toroid has been driving me crazy for two days now.  I keep losing count and end up unwinding everything to start over again.
Can anybody tell me if there is enough excess 34 ga magnet wire in the kit to trye and start over again.  I suspect my first (and second thru sixth) try wire has a lot of nicks in it.
73 de Lee
KM4YY
Romney, WV

On 3/25/2013 5:44 PM, Louis Axeman wrote:
 
Good luck to you, also, Steve.  I hope the toroids wind up successfully.  Will probably start soldering resistors tomorrow and then try toroids.
 
Lou, N8LA

From: w1sfr
To: Louis Axeman ; 4sqrp@...
Sent: Monday, March 25, 2013 4:10 PM
Subject: [4sqrp] Re: A Good Night for Finishing Pig Rig Inventory
 

Good luck Lou. My first post here and I just started my pig rig too. Going to wind my toroids tonight if I can.

Steve
W1SFR

--- In mailto:4sqrp%40yahoogroups.com, Louis Axeman wrote:
>
> Greetings,
>  
> Finally finished inventorying Pig Rig #204 parts tonight so this is a good night for me. 
>  
> 72/73,
> Lou, N8LA
>




Re: Ozarkcon 2m freq

ka0ncr
 



From: Arnie Grubbs ;
To: 4sqrp@... <4sqrp@...>;
Subject: Ozarkcon 2m freq
Sent: Tue, Mar 26, 2013 10:32:47 PM

.
Sounds like a good plan.. Joe K0NEB and I will be heading down on Thursday. Should be there about 3 or 4 pm.
Will have an ht on while out and about looking around town. Not sure what's going on Friday, but will
Listen, and maybe a few can get something arranged to meet up for lunch or something.

73. Arnie KA0NCR

Re: Ozarkcon 2m freq?
Posted by: "John Taylor" k0qh@... k0qh@...
Date: Tue Mar 26, 2013 8:02 am ((PDT))

Yes, 147.195 is the repeater and Walter,K5EST suggested 146.52 at Stone Castle.
May bring out some of the locals on 52. I'm coming in on Thursday, will have the
HT on 52 and 147.195 while mobile. See everyone there.

John Taylor,K0QH


Re: A Good Night for Finishing Pig Rig Inventory

Paul Smith
 

I have wound the small roid twice. The wires are like they are supposed to be but I am still not sure if I have "6 full turns on"
Paul N0NBD

Sent from my iPad

On Mar 26, 2013, at 1:06 PM, Joe E <cornhusker@...> wrote:

 

It took me two tries to get the small binocular toroid right too. It is a bit confusing at first but isn't too bad once you figure it out. I just have resistors in and sip pins besides the toroids.
73 de K0NEB

Sent from Yahoo! Mail on Android



From: David Martin <davemrtn@...>;
To: <4sqrp@...>; Stephen Roberts <steverob@...>;
Subject: Re: [4sqrp] Re: A Good Night for Finishing Pig Rig Inventory
Sent: Tue, Mar 26, 2013 4:33:57 PM

Yup, and if there's a hard way to do something, I'll find it.

While I was messing with my binocular toroid I thought up a 'rule of thumb' for winding one.

If you need a winding with an odd number of turns, insert the 'initial hair pin' from the opposite where the leads will be soldered. Each time the leads are wrapped through and back to the side where they'll terminate add '2' - therefore the count would be 1, 3, 5, 7, etc.

If you need an even number of turns, insert the 'initial hair pin' on the same side where the ends will terminate and then loop the ends back to that side. Again add 2 each time the leads are looped through both holes - therefore the count would be 2, 4, 6, 8, etc.


--
David Martin - K5DCM - Mountain Home Ar.



Quoting Stephen Roberts :
 

Yes, those are nasty to wind. I hope I got mine right. I guess I'll find out when I do my smoke test. BTW, is there any way to test a toroid to ensure that you got it right? Installing caps this afternoon and winding the rest of the toroids.


73
Steve
W1SFR


On Mar 26, 2013, at 11:41 AM, David Martin wrote:

Maybe I should go back and check my small binocular, I re-did my big binocular 3 times before I was satisfied I did it right.

But the first problem I had with the big binocular was I had soldered the "end" connections into the holes for the capacitors !!  After that I questioned everything I did with that big binocular.


--
David Martin - K5DCM - Mountain Home Ar.



Quoting "Lee Mairs (SAG)" :
 

The first small binocular toroid has been driving me crazy for two days now.  I keep losing count and end up unwinding everything to start over again.
Can anybody tell me if there is enough excess 34 ga magnet wire in the kit to trye and start over again.  I suspect my first (and second thru sixth) try wire has a lot of nicks in it.
73 de Lee
KM4YY
Romney, WV

On 3/25/2013 5:44 PM, Louis Axeman wrote:
 
Good luck to you, also, Steve.  I hope the toroids wind up successfully.  Will probably start soldering resistors tomorrow and then try toroids.
 
Lou, N8LA

From: w1sfr
To: Louis Axeman ; 4sqrp@...
Sent: Monday, March 25, 2013 4:10 PM
Subject: [4sqrp] Re: A Good Night for Finishing Pig Rig Inventory
 

Good luck Lou. My first post here and I just started my pig rig too. Going to wind my toroids tonight if I can.

Steve
W1SFR

--- In mailto:4sqrp%40yahoogroups.com, Louis Axeman wrote:
>
> Greetings,
>  
> Finally finished inventorying Pig Rig #204 parts tonight so this is a good night for me. 
>  
> 72/73,
> Lou, N8LA
>




Re: Ozarkcon 2m freq? - Minds-Eye Picture

davemrtn
 

Yes....   but that's not nearly as funny !

On 03/26/2013 03:58 PM, John Taylor wrote:
 
Perhaps I am not understanding this. My thoughts were room to room etc.
 
John Taylor,K0QH
PB #174
SLQS
4SQRP
www.stgdxcc.webs.com



From: Jim Sheldon
To: 4SQRP Mailing List <4sqrp@...>
Sent: Tue, March 26, 2013 11:27:39 AM
Subject: Re: [4sqrp] Ozarkcon 2m freq? - Minds-Eye Picture

 
Now that's funny!  I do have to admit to using an HT at hamfests to keep track of my wife but to go as far as talking across the table on an HT? --- LOL!!!!  Maybe if it was one of those medieval castle dinners and the other person was down the half mile long table from me?  
 
See you guys at OzarkCon -- N5LXW and I will be arriving with the Elecraft Demo stuff around Noonish on Friday.
 
Jim - W0EB

 
> Reminds me of a bunch of kids I saw
> the other day in a room texting each other !!!!
> --
> David Martin
> - K5DCM - Mountain Home Ar.
>
 


--
David Martin - K5DCM ---o0o---
Mountain Home, Arkansas

Guns don't kill people, any more than spoons & forks cause obesity.

 


Re: eznec and LTspice software

Phil Anderson
 


Hi Barney..............spice is a software program for simulating circuits. Yes, you can use it to simulate a regen ar audio or RF. If you wish I can send you a short article about that that I did for the last Xtal Set Society Newsletter in March. I can send that in pdf format. Let me know if you wish me to send it.
 
UNK Phil, W0XI


Would this work for a regenerative radio?

Barney



Re: Ozarkcon 2m freq? - Minds-Eye Picture

John Taylor <k0qh@...>
 

Perhaps I am not understanding this. My thoughts were room to room etc.
 
John Taylor,K0QH
PB #174
SLQS
4SQRP
www.stgdxcc.webs.com



From: Jim Sheldon
To: 4SQRP Mailing List <4sqrp@...>
Sent: Tue, March 26, 2013 11:27:39 AM
Subject: Re: [4sqrp] Ozarkcon 2m freq? - Minds-Eye Picture

 

Now that's funny!  I do have to admit to using an HT at hamfests to keep track of my wife but to go as far as talking across the table on an HT? --- LOL!!!!  Maybe if it was one of those medieval castle dinners and the other person was down the half mile long table from me?  
 
See you guys at OzarkCon -- N5LXW and I will be arriving with the Elecraft Demo stuff around Noonish on Friday.
 
Jim - W0EB

 
> Reminds me of a bunch of kids I saw
> the other day in a room texting each other !!!!
> --
> David Martin
> - K5DCM - Mountain Home Ar.
>
 


Re: A Good Night for Finishing Pig Rig Inventory

cornhusker
 

Pins are only for the crystals..not the toroids.
73 de K0NEB

Sent from Yahoo! Mail on Android



From: Lee Mairs (SAG) ;
To: <4sqrp@...>; Joe E ;
Subject: Re: [4sqrp] Re: A Good Night for Finishing Pig Rig Inventory
Sent: Tue, Mar 26, 2013 8:50:43 PM

 

Interesting.  I have Sip pins in for the crystals, but hadn't though about doing it for the toroids.
73 de Lee
KM4YY

On 3/26/2013 2:06 PM, Joe E wrote:
 

It took me two tries to get the small binocular toroid right too. It is a bit confusing at first but isn't too bad once you figure it out. I just have resistors in and sip pins besides the toroids.
73 de K0NEB

Sent from Yahoo! Mail on Android



From: David Martin ;
To: <4sqrp@...>; Stephen Roberts ;
Subject: Re: [4sqrp] Re: A Good Night for Finishing Pig Rig Inventory
Sent: Tue, Mar 26, 2013 4:33:57 PM

Yup, and if there's a hard way to do something, I'll find it.

While I was messing with my binocular toroid I thought up a 'rule of thumb' for winding one.

If you need a winding with an odd number of turns, insert the 'initial hair pin' from the opposite where the leads will be soldered. Each time the leads are wrapped through and back to the side where they'll terminate add '2' - therefore the count would be 1, 3, 5, 7, etc.

If you need an even number of turns, insert the 'initial hair pin' on the same side where the ends will terminate and then loop the ends back to that side. Again add 2 each time the leads are looped through both holes - therefore the count would be 2, 4, 6, 8, etc.


--
David Martin - K5DCM - Mountain Home Ar.



Quoting Stephen Roberts :
 

Yes, those are nasty to wind. I hope I got mine right. I guess I'll find out when I do my smoke test. BTW, is there any way to test a toroid to ensure that you got it right? Installing caps this afternoon and winding the rest of the toroids.


73
Steve
W1SFR


On Mar 26, 2013, at 11:41 AM, David Martin wrote:

Maybe I should go back and check my small binocular, I re-did my big binocular 3 times before I was satisfied I did it right.

But the first problem I had with the big binocular was I had soldered the "end" connections into the holes for the capacitors !!  After that I questioned everything I did with that big binocular.


--
David Martin - K5DCM - Mountain Home Ar.



Quoting "Lee Mairs (SAG)" :
 

The first small binocular toroid has been driving me crazy for two days now.  I keep losing count and end up unwinding everything to start over again.
Can anybody tell me if there is enough excess 34 ga magnet wire in the kit to trye and start over again.  I suspect my first (and second thru sixth) try wire has a lot of nicks in it.
73 de Lee
KM4YY
Romney, WV

On 3/25/2013 5:44 PM, Louis Axeman wrote:
 
Good luck to you, also, Steve.  I hope the toroids wind up successfully.  Will probably start soldering resistors tomorrow and then try toroids.
 
Lou, N8LA

From: w1sfr
To: Louis Axeman ; 4sqrp@...
Sent: Monday, March 25, 2013 4:10 PM
Subject: [4sqrp] Re: A Good Night for Finishing Pig Rig Inventory
 

Good luck Lou. My first post here and I just started my pig rig too. Going to wind my toroids tonight if I can.

Steve
W1SFR

--- In mailto:4sqrp%40yahoogroups.com, Louis Axeman wrote:
>
> Greetings,
>  
> Finally finished inventorying Pig Rig #204 parts tonight so this is a good night for me. 
>  
> 72/73,
> Lou, N8LA
>





Re: eznec and LTspice software

Barney <barneyro@...>
 


Would this work for a regenerative radio?

Barney


On 3/26/2013 2:07 PM, Bobby Rolph wrote:
 
Thanks for the info Tom. I will go to the website and print them out!
Bobby
Kb4qnr


Sent from my iPad

On Mar 26, 2013, at 2:38 PM, "Tom" <kc0vsj@...> wrote:

 

I got my start in LT Spice with the QST Column Hands-On-Radio. There were at least three articles (somehow I thought there may have been a fourth one) and all are available for members in the in-line archives. Using Spice has revolutionized my home brewing...

JAN 2010 - QST (PG. 61)
Experiment #83 -- Circuit Simulation, Build and Test
(Hands-On Radio)
Author: Silver, H. Ward, N0AX
Article: QST Archive [PDF]

FEB 2010 - QST (PG. 59)
Experiment #85 -- Circuit Simulation, Complex Parts
(Hands-On Radio)
Author: Silver, H. Ward, N0AX

MAR 2010 - QST (PG. 59)
Experiment #86 -- Viewing Waveforms in LTspice
(Hands-On Radio)
Author: Silver, H. Ward, N0AX

> ----------------------------------------------------------
> To: 4sqrp@...; n0evh@...; wa0itp@...
> CC: aldenmcduffie@...
> From: aldenmcduffie@...
> Date: Mon, 25 Mar 2013 11:42:45 -0500
> Subject: [4sqrp] eznec and LTspice software
>
>
>
>
> Good idea John on downloading EZNEC. It does take a bit of time to get used to the manual/instructions - and that would be true of any manuals "written" today. Manuals in general are a problem. Take my iPhone as an example, really crappy documentation. About 6 or 8 years ago I was visiting my daughter in St Louis and we were cleaning her kitchen. We really cleaned the stove top gas range only to discover the manual for it in the drawer, written in about 1950. I found that manual to be excellent, very clear on how to use it and what burner went with what knob, etc. Not so of today's ranges. When did we stop teaching writing to kids, todays designers? Maybe about 1980?
>
> A second via John, consider downloading LTspice. You can download a free copy from linear technology's website. It is really super for simulating circuit. It's easy, for example, to draw the schematic for a audio phase-shift oscillator and then hit the simulation button; you can select to see the waveform generated or the frequency response of the unit. Then you can change values and play what if. Again....the manual takes some time to get used to.
>
> If anyone is interested, we could get a "go-to-meeting" link set up on the WEB and I'd be happy to outline how to use the program, generating and simulating several simple circuits. Let's discuss that at Ozcon?
>
> Uncle Phil
>



Re: A Good Night for Finishing Pig Rig Inventory

Lee Mairs (SAG) <lmairs@...>
 

Interesting.  I have Sip pins in for the crystals, but hadn't though about doing it for the toroids.
73 de Lee
KM4YY

On 3/26/2013 2:06 PM, Joe E wrote:
 

It took me two tries to get the small binocular toroid right too. It is a bit confusing at first but isn't too bad once you figure it out. I just have resistors in and sip pins besides the toroids.
73 de K0NEB

Sent from Yahoo! Mail on Android



From: David Martin ;
To: <4sqrp@...>; Stephen Roberts ;
Subject: Re: [4sqrp] Re: A Good Night for Finishing Pig Rig Inventory
Sent: Tue, Mar 26, 2013 4:33:57 PM

Yup, and if there's a hard way to do something, I'll find it.

While I was messing with my binocular toroid I thought up a 'rule of thumb' for winding one.

If you need a winding with an odd number of turns, insert the 'initial hair pin' from the opposite where the leads will be soldered. Each time the leads are wrapped through and back to the side where they'll terminate add '2' - therefore the count would be 1, 3, 5, 7, etc.

If you need an even number of turns, insert the 'initial hair pin' on the same side where the ends will terminate and then loop the ends back to that side. Again add 2 each time the leads are looped through both holes - therefore the count would be 2, 4, 6, 8, etc.


--
David Martin - K5DCM - Mountain Home Ar.



Quoting Stephen Roberts :
 

Yes, those are nasty to wind. I hope I got mine right. I guess I'll find out when I do my smoke test. BTW, is there any way to test a toroid to ensure that you got it right? Installing caps this afternoon and winding the rest of the toroids.


73
Steve
W1SFR


On Mar 26, 2013, at 11:41 AM, David Martin wrote:

Maybe I should go back and check my small binocular, I re-did my big binocular 3 times before I was satisfied I did it right.

But the first problem I had with the big binocular was I had soldered the "end" connections into the holes for the capacitors !!  After that I questioned everything I did with that big binocular.


--
David Martin - K5DCM - Mountain Home Ar.



Quoting "Lee Mairs (SAG)" :
 

The first small binocular toroid has been driving me crazy for two days now.  I keep losing count and end up unwinding everything to start over again.
Can anybody tell me if there is enough excess 34 ga magnet wire in the kit to trye and start over again.  I suspect my first (and second thru sixth) try wire has a lot of nicks in it.
73 de Lee
KM4YY
Romney, WV

On 3/25/2013 5:44 PM, Louis Axeman wrote:
 
Good luck to you, also, Steve.  I hope the toroids wind up successfully.  Will probably start soldering resistors tomorrow and then try toroids.
 
Lou, N8LA

From: w1sfr
To: Louis Axeman ; 4sqrp@...
Sent: Monday, March 25, 2013 4:10 PM
Subject: [4sqrp] Re: A Good Night for Finishing Pig Rig Inventory
 

Good luck Lou. My first post here and I just started my pig rig too. Going to wind my toroids tonight if I can.

Steve
W1SFR

--- In mailto:4sqrp%40yahoogroups.com, Louis Axeman wrote:
>
> Greetings,
>  
> Finally finished inventorying Pig Rig #204 parts tonight so this is a good night for me. 
>  
> 72/73,
> Lou, N8LA
>





Re: eznec and LTspice software

bobby rolph
 

Thanks for the info Tom. I will go to the website and print them out!
Bobby
Kb4qnr


Sent from my iPad

On Mar 26, 2013, at 2:38 PM, "Tom" <kc0vsj@...> wrote:

 

I got my start in LT Spice with the QST Column Hands-On-Radio. There were at least three articles (somehow I thought there may have been a fourth one) and all are available for members in the in-line archives. Using Spice has revolutionized my home brewing...

JAN 2010 - QST (PG. 61)
Experiment #83 -- Circuit Simulation, Build and Test
(Hands-On Radio)
Author: Silver, H. Ward, N0AX
Article: QST Archive [PDF]

FEB 2010 - QST (PG. 59)
Experiment #85 -- Circuit Simulation, Complex Parts
(Hands-On Radio)
Author: Silver, H. Ward, N0AX

MAR 2010 - QST (PG. 59)
Experiment #86 -- Viewing Waveforms in LTspice
(Hands-On Radio)
Author: Silver, H. Ward, N0AX

> ----------------------------------------------------------
> To: 4sqrp@...; n0evh@...; wa0itp@...
> CC: aldenmcduffie@...
> From: aldenmcduffie@...
> Date: Mon, 25 Mar 2013 11:42:45 -0500
> Subject: [4sqrp] eznec and LTspice software
>
>
>
>
> Good idea John on downloading EZNEC. It does take a bit of time to get used to the manual/instructions - and that would be true of any manuals "written" today. Manuals in general are a problem. Take my iPhone as an example, really crappy documentation. About 6 or 8 years ago I was visiting my daughter in St Louis and we were cleaning her kitchen. We really cleaned the stove top gas range only to discover the manual for it in the drawer, written in about 1950. I found that manual to be excellent, very clear on how to use it and what burner went with what knob, etc. Not so of today's ranges. When did we stop teaching writing to kids, todays designers? Maybe about 1980?
>
> A second via John, consider downloading LTspice. You can download a free copy from linear technology's website. It is really super for simulating circuit. It's easy, for example, to draw the schematic for a audio phase-shift oscillator and then hit the simulation button; you can select to see the waveform generated or the frequency response of the unit. Then you can change values and play what if. Again....the manual takes some time to get used to.
>
> If anyone is interested, we could get a "go-to-meeting" link set up on the WEB and I'd be happy to outline how to use the program, generating and simulating several simple circuits. Let's discuss that at Ozcon?
>
> Uncle Phil
>


Re: eznec and LTspice software

Tom Clifton
 

I got my start in LT Spice with the QST Column Hands-On-Radio. There were at least three articles (somehow I thought there may have been a fourth one) and all are available for members in the in-line archives. Using Spice has revolutionized my home brewing...

JAN 2010 - QST (PG. 61)
Experiment #83 -- Circuit Simulation, Build and Test
(Hands-On Radio)
Author: Silver, H. Ward, N0AX
Article: QST Archive [PDF]

FEB 2010 - QST (PG. 59)
Experiment #85 -- Circuit Simulation, Complex Parts
(Hands-On Radio)
Author: Silver, H. Ward, N0AX

MAR 2010 - QST (PG. 59)
Experiment #86 -- Viewing Waveforms in LTspice
(Hands-On Radio)
Author: Silver, H. Ward, N0AX

------------------------------------------------------------------------------
To: 4sqrp@yahoogroups.com; n0evh@...; wa0itp@...
CC: aldenmcduffie@...
From: aldenmcduffie@...
Date: Mon, 25 Mar 2013 11:42:45 -0500
Subject: [4sqrp] eznec and LTspice software




Good idea John on downloading EZNEC. It does take a bit of time to get used to the manual/instructions - and that would be true of any manuals "written" today. Manuals in general are a problem. Take my iPhone as an example, really crappy documentation. About 6 or 8 years ago I was visiting my daughter in St Louis and we were cleaning her kitchen. We really cleaned the stove top gas range only to discover the manual for it in the drawer, written in about 1950. I found that manual to be excellent, very clear on how to use it and what burner went with what knob, etc. Not so of today's ranges. When did we stop teaching writing to kids, todays designers? Maybe about 1980?

A second via John, consider downloading LTspice. You can download a free copy from linear technology's website. It is really super for simulating circuit. It's easy, for example, to draw the schematic for a audio phase-shift oscillator and then hit the simulation button; you can select to see the waveform generated or the frequency response of the unit. Then you can change values and play what if. Again....the manual takes some time to get used to.

If anyone is interested, we could get a "go-to-meeting" link set up on the WEB and I'd be happy to outline how to use the program, generating and simulating several simple circuits. Let's discuss that at Ozcon?

Uncle Phil


Re: A Good Night for Finishing Pig Rig Inventory

cornhusker
 

It took me two tries to get the small binocular toroid right too. It is a bit confusing at first but isn't too bad once you figure it out. I just have resistors in and sip pins besides the toroids.
73 de K0NEB

Sent from Yahoo! Mail on Android



From: David Martin To: <4sqrp@...>; Stephen Roberts ;
Subject: Re: [4sqrp] Re: A Good Night for Finishing Pig Rig Inventory
Sent: Tue, Mar 26, 2013 4:33:57 PM

Yup, and if there's a hard way to do something, I'll find it.

While I was messing with my binocular toroid I thought up a 'rule of thumb' for winding one.

If you need a winding with an odd number of turns, insert the 'initial hair pin' from the opposite where the leads will be soldered. Each time the leads are wrapped through and back to the side where they'll terminate add '2' - therefore the count would be 1, 3, 5, 7, etc.

If you need an even number of turns, insert the 'initial hair pin' on the same side where the ends will terminate and then loop the ends back to that side. Again add 2 each time the leads are looped through both holes - therefore the count would be 2, 4, 6, 8, etc.


--
David Martin - K5DCM - Mountain Home Ar.



Quoting Stephen Roberts :

 

Yes, those are nasty to wind. I hope I got mine right. I guess I'll find out when I do my smoke test. BTW, is there any way to test a toroid to ensure that you got it right? Installing caps this afternoon and winding the rest of the toroids.


73
Steve
W1SFR


On Mar 26, 2013, at 11:41 AM, David Martin wrote:

Maybe I should go back and check my small binocular, I re-did my big binocular 3 times before I was satisfied I did it right.

But the first problem I had with the big binocular was I had soldered the "end" connections into the holes for the capacitors !!  After that I questioned everything I did with that big binocular.


--
David Martin - K5DCM - Mountain Home Ar.



Quoting "Lee Mairs (SAG)" :
 

The first small binocular toroid has been driving me crazy for two days now.  I keep losing count and end up unwinding everything to start over again.
Can anybody tell me if there is enough excess 34 ga magnet wire in the kit to trye and start over again.  I suspect my first (and second thru sixth) try wire has a lot of nicks in it.
73 de Lee
KM4YY
Romney, WV

On 3/25/2013 5:44 PM, Louis Axeman wrote:
 
Good luck to you, also, Steve.  I hope the toroids wind up successfully.  Will probably start soldering resistors tomorrow and then try toroids.
 
Lou, N8LA

From: w1sfr
To: Louis Axeman ; 4sqrp@...
Sent: Monday, March 25, 2013 4:10 PM
Subject: [4sqrp] Re: A Good Night for Finishing Pig Rig Inventory
 

Good luck Lou. My first post here and I just started my pig rig too. Going to wind my toroids tonight if I can.

Steve
W1SFR

--- In mailto:4sqrp%40yahoogroups.com, Louis Axeman wrote:
>
> Greetings,
>  
> Finally finished inventorying Pig Rig #204 parts tonight so this is a good night for me. 
>  
> 72/73,
> Lou, N8LA
>




Re: A Good Night for Finishing Pig Rig Inventory

davemrtn