Date   

Re: 4S QRP Watering Holes!

John Lonigro
 

Charles:

The unique feature of the Pigrig is the narrow crystal filter is also tuned to 7.031 MHz.  The entire rig is designed around that frequency.  Diz was able to do that because it is a single frequency rig.  That's why, for example, you can't easily modify it to use the SAVXO.

72,
John AA0VE

On 03/02/2013 08:57 PM, Charles Moizeau wrote:
 

I've been following this and the Pig Rig thread.  I seems that there are some concerns over being pinned down to one frequency, and it may be that there will be some VXO modifications that will arrive in due time.  There are some well-known techniques for stretching the frequency swing a small bit, e.g., paralleling a second crystal of almost the same frequency and putting one or more inductors in the pulling circuitry.

Of possible interest is an article published in 73 Magazine for March 1996 by Ken Cornell, W2IMB, SK.
The link is:

http://ia700806.us.archive.org/15/items/73-magazine-1996-03/03_March_1996.pdf

Ken used that simplest of oscillators, the Pierce; An MF102, one crystal, five disc capacitors , one resistor, one rf choke and a permeability tuned inductor.  Ken reports being able to swing a 3.57945 mHz color burst crystal some 30 to 40kHz!  The secret was in the sauce and the sauce used litz wire in the inductor
.

My workbench is currently bare for I am presently concerned with post-Sandy repairs and clean-up, but I find myself not too charmed by the mechanics of the described permeability tuning arrangement. 

I'm wondering if the inductor might be litz wire on a toroidal form with the variable tuning supplied by a variable capacitor.  Another thought is that, instead of a variable capacitor, a control winding might be interwound with the litz, and that control winding could be shunted by a rheostat.  Varying the rheostat's resistance would vary the impedance that the control winding would reflect back into the litz winding, and thus change its inductance and the oscillator's frequency.

72,

Charles, W2SH

 




To: 4sqrp@...; davemrtn@...
CC: wa0itp@...; jomatlock@...
From: jonigro@...
Date: Sat, 2 Mar 2013 05:24:47 -0600
Subject: Re: [4sqrp] 4S QRP Watering Holes!

 
Putting the pigrig on 7122 might be super easy, but what happens when you have to move up or down a little when that frequency is busy?

John AA0VE


On 03/01/2013 10:19 PM, David Martin wrote:
 

Never mind, looks like changing crystals would be a whole lot easier.

On 03/01/2013 09:49 PM, David Martin wrote:
 

I hadn't printed schematics yet to see if it's doable, but what about adapting the SAVXO to the Pig Rig ???


On 03/01/2013 08:47 PM, WA0ITP wrote:
 

It will be super easy to put the existing pigrig on 7122 - 4 crystals is all it takes.  My 7040 rocks are all soldered in, may have to change 'em out. 
 
----------------------------------
I love this radio stuff !
72   WAØITP
www.wa0itp.com
www.4sqrp.com
www.qrpspots.com
 
 
----- Original Message -----
Sent: Friday, March 01, 2013 8:42 PM
Subject: [4sqrp] 4S QRP Watering Holes!

He Guys
Well it's neat to see all the excitement that 
has been stirred up with the DiZ Pig Rig!
Now, we need to find some  "Watering Holes  for our group to hang out at so we can go there and see who is calling CQ. 3564 and 7122 seem like candidates for 40 and 80, but how about 20m?
Do we move up a little to 14.062? 
Just a thought for you guys to kick around.
We seem to have a new found presence on the QRP world and I think it would be neat to have a place to meet up on the bands!
Thanks 
Johnny AC0BQ






Re: 4S QRP Watering Holes!

w2sh@...
 

I've been following this and the Pig Rig thread.  I seems that there are some concerns over being pinned down to one frequency, and it may be that there will be some VXO modifications that will arrive in due time.  There are some well-known techniques for stretching the frequency swing a small bit, e.g., paralleling a second crystal of almost the same frequency and putting one or more inductors in the pulling circuitry.

Of possible interest is an article published in 73 Magazine for March 1996 by Ken Cornell, W2IMB, SK.
The link is:

http://ia700806.us.archive.org/15/items/73-magazine-1996-03/03_March_1996.pdf

Ken used that simplest of oscillators, the Pierce; An MF102, one crystal, five disc capacitors , one resistor, one rf choke and a permeability tuned inductor.  Ken reports being able to swing a 3.57945 mHz color burst crystal some 30 to 40kHz!  The secret was in the sauce and the sauce used litz wire in the inductor
.

My workbench is currently bare for I am presently concerned with post-Sandy repairs and clean-up, but I find myself not too charmed by the mechanics of the described permeability tuning arrangement. 

I'm wondering if the inductor might be litz wire on a toroidal form with the variable tuning supplied by a variable capacitor.  Another thought is that, instead of a variable capacitor, a control winding might be interwound with the litz, and that control winding could be shunted by a rheostat.  Varying the rheostat's resistance would vary the impedance that the control winding would reflect back into the litz winding, and thus change its inductance and the oscillator's frequency.

72,

Charles, W2SH

 




To: 4sqrp@...; davemrtn@...
CC: wa0itp@...; jomatlock@...
From: jonigro@...
Date: Sat, 2 Mar 2013 05:24:47 -0600
Subject: Re: [4sqrp] 4S QRP Watering Holes!

 
Putting the pigrig on 7122 might be super easy, but what happens when you have to move up or down a little when that frequency is busy?

John AA0VE


On 03/01/2013 10:19 PM, David Martin wrote:
 

Never mind, looks like changing crystals would be a whole lot easier.

On 03/01/2013 09:49 PM, David Martin wrote:
 

I hadn't printed schematics yet to see if it's doable, but what about adapting the SAVXO to the Pig Rig ???


On 03/01/2013 08:47 PM, WA0ITP wrote:
 

It will be super easy to put the existing pigrig on 7122 - 4 crystals is all it takes.  My 7040 rocks are all soldered in, may have to change 'em out. 
 
----------------------------------
I love this radio stuff !
72   WAØITP
www.wa0itp.com
www.4sqrp.com
www.qrpspots.com
 
 
----- Original Message -----
Sent: Friday, March 01, 2013 8:42 PM
Subject: [4sqrp] 4S QRP Watering Holes!

He Guys
Well it's neat to see all the excitement that 
has been stirred up with the DiZ Pig Rig!
Now, we need to find some  "Watering Holes  for our group to hang out at so we can go there and see who is calling CQ. 3564 and 7122 seem like candidates for 40 and 80, but how about 20m?
Do we move up a little to 14.062? 
Just a thought for you guys to kick around.
We seem to have a new found presence on the QRP world and I think it would be neat to have a place to meet up on the bands!
Thanks 
Johnny AC0BQ





Re: CQ CQ CQ on 3560

Johnny AC0BQ
 

Where you at Paul?


On Saturday, March 2, 2013, PaulS wrote:
 

De Paul NONBD spots doesn't like my spot I guess 2 try's and no post yet CQ CQ de NONBD


CQ CQ CQ on 3560

Paul Smith
 

De Paul NONBD spots doesn't like my spot I guess 2 try's and no post yet CQ CQ de NONBD


pig rig

Dg Arnholt <dgarnholt@...>
 

the rig sounds fun.. good price 2 ..but with itu changing us with region 2 it all could be moot.. i'll use the 4020 on 7122 ...just need something on 30 not that iever had a qso on 30 since it opened to hams.. but things change i suppose:) lol
Denniswd9dwe


Pig rig shipped

Paul Smith
 

I got an email this morning saying pig rig nr 158 is shipped..... Oink oink de Paul NONBD


Re: Pig Rig

WA0ITP
 

GM BArtimus

It is a TP-19

----------------------------------
I love this radio stuff !
72 WA�ITP
www.wa0itp.com
www.4sqrp.com
www.qrpspots.com

----- Original Message -----
From: "Bart Lawson" <blawson2@...>
To: <4sqrp@...>; "bobby" <rolph981@...>
Sent: Saturday, March 02, 2013 11:44 AM
Subject: Re: [4sqrp] Pig Rig


| Bobby what was the number? Terry gave me the number but I accidentally
deleted it!
|
| cu es 72, Bart
|
| ------------------------------------
|
| 4SQRP Website: http://4sqrp.com
| OzarkCon is coming April 5-6 in Branson, MO
| View Details at http://www.ozarkcon.com/index.phpYahoo! Groups Links
|
|
|


Re: WEd Nite CW Net

Steve Sellmeyer <ssellmeyer@...>
 

Ahhhhh yes, WB0QQT started out as WN0QQT in 1975. Never have given any thought to changing my call as I figure it's good for CW practice. (chuckle)
 
Glad you mentioned the short call versus the long call. Guess I never thought of it that way but it makes sense to me. It works too as you say.Thanks !
 
Steve/WB0QQT dah dah dah dah dah etc. :):):)


Re: Pig Rig Enclosure Ten Tec TP-19

David Martin <davemrtn@...>
 

Thanks.  Used that to order a house for my pig.

On 03/02/2013 12:25 PM, Mike-WE0H wrote:
Ten Tec TP-19 enclosure


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

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

 


Re: Pig Rig Enclosure Ten Tec TP-19

Mike-WE0H
 

Here's what Terry posted on March 1st about the enclosure:

If you use the Ten Tec TP-19 enclosure, I'll be happy to send you a label with
your call and build date on
it. A picture of mine in the TPC-19 is here, http://www.wa0itp.com/index.html
I do like the charcoal color. The TP-19 dimensions on the Ten Tec web site
differ from the one I purchased. Mine is 2" x 4.75" x 4" and the PigRig fits
perfectly. http://www.wa0itp.com/pigrig3b.jpg

Mike-WE0H


Re: Pig Rig

David Martin <davemrtn@...>
 

might as well post it on the reflector....

On 03/02/2013 11:44 AM, Bart Lawson wrote:
 

Bobby what was the number? Terry gave me the number but I accidentally deleted it!

cu es 72, Bart



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

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

 


Re: Pig Rig

W0IIT
 

Bobby what was the number? Terry gave me the number but I accidentally deleted it!

cu es 72, Bart


Re: Pig Rig

bobby rolph
 

Just got the number via email.
Thanks

--- In 4sqrp@..., "bobby" <rolph981@...> wrote:

Does anyone have the part number handy for the Ten Tec project box for the Pig Rig.
Thanks
Bobby kb4qnr


Pig Rig

bobby rolph
 

Does anyone have the part number handy for the Ten Tec project box for the Pig Rig.
Thanks
Bobby kb4qnr


Re: QRPspots Android App

Mike-WE0H
 

Awesome. Works perfect on my rooted Note :) Even allows me to enter 600 meter data. That will be useful later when we get the band as Amateur and I am out running portable QRP in the parks with my tiny antenna ;)
Mike-WE0H


Re: Flying pig rig saga!

Bill Cromwell
 

On Sat, 2013-03-02 at 08:59 -0600, WA0ITP wrote:



George,

Excellent work so far, but I suspect it's time to post your note on
the Flying Pig reflector. Most PigRig builders hang out there and the
designer monitors the list also.

The extra 1/2" core is probably for the choke on the power supply
leads.

Good luck.
AH!

So it's a half *INCH* core and not half of a core!

Y'all have to understand you don't get any bragging rights at all for
confusing me because it's just too easy.

73,

Bill KU8H

Proud owner of the 40 meter band


Re: 4S QRP Watering Holes!

Paul Smith
 

30 meters has been my favorite for years for the reasons givin below....
Paul NONBD

Sent from my iPad

On Mar 2, 2013, at 9:02 AM, "Phil Anderson" <aldenmcduffie@...> wrote:

 

Hi Johnny! I've not been following this thread.........but what about 30-meters......can usually find
activity there late afternoon and early evening.....nice band and not as galactic noisy as 80 and 40...............72, Uncle Phil, W0XI
 


Re: 4S QRP Watering Holes!

Phil Anderson
 

Hi Johnny! I've not been following this thread.........but what about 30-meters......can usually find
activity there late afternoon and early evening.....nice band and not as galactic noisy as 80 and 40...............72, Uncle Phil, W0XI
 


Flying pig rig saga!

WA0ITP
 


George,
 
Excellent work so far, but I suspect it's time to post your note on the Flying Pig reflector.  Most PigRig builders hang out there and the designer monitors the list also.
 
The extra 1/2" core is probably for the choke on the power supply leads. 
 
Good luck.
 
----------------------------------
I love this radio stuff !
72   WAØITP
www.wa0itp.com
www.4sqrp.com
www.qrpspots.com
 
 

----- Original Message -----
From: w2bpi1@...
Sent: Saturday, March 02, 2013 8:40 AM
Subject: Re: [4sqrp] Fwd: Flying pig rig saga!

So far I have done the following:
Made sure all parts in correct place.
Checked toroids. One had one xtra turn. Removed xtra turn.
Removed binocular toroids and re wound them.
Re heated all solder joints.
Made sure all transistors were correct ones and installed correctly.
I tried changing xtal. Problem still there.
If I listen to the osc without transmitting I do not hear any birdies.
I have a 1/2 toroid left over. Parts list says it is L7. I see no place for it on the board or see it on the schematic?
 I have also tried running the rig on battery power.
About ready to put it in the pig sty (junk box)
 Tnx to everyone for your suggestions.
72 Geo/W2BPI
 
In a message dated 3/1/2013 10:29:48 A.M. Eastern Standard Time, w2bpi1@... writes:
 

 
Oh Oh just got this report!! Any ideas what could cause this?  Tnx Geo/W2BPI
From: polarmail@...
To: w2bpi1@...
Sent: 3/1/2013 10:06:21 A.M. Eastern Standard Time
Subj: Ur CW signal
 
Hi George,
 
Listening to you on 40 meters this morning in QSO with W8QP.
I tried to call you first but couldn't figure out which signal was your findamental
as you are radiating on the whole band 1.2khz apart.
Thought you might want to know about it before an OO sights in on you.
 
73,
Rick W3BI
Allentown PA


Re: Flying pig rig saga!

George H. Gates
 

So far I have done the following:
Made sure all parts in correct place.
Checked toroids. One had one xtra turn. Removed xtra turn.
Removed binocular toroids and re wound them.
Re heated all solder joints.
Made sure all transistors were correct ones and installed correctly.
I tried changing xtal. Problem still there.
If I listen to the osc without transmitting I do not hear any birdies.
I have a 1/2 toroid left over. Parts list says it is L7. I see no place for it on the board or see it on the schematic?
 I have also tried running the rig on battery power.
About ready to put it in the pig sty (junk box)
 Tnx to everyone for your suggestions.
72 Geo/W2BPI
 

In a message dated 3/1/2013 10:29:48 A.M. Eastern Standard Time, w2bpi1@... writes:
 

 
Oh Oh just got this report!! Any ideas what could cause this?  Tnx Geo/W2BPI
From: polarmail@...
To: w2bpi1@...
Sent: 3/1/2013 10:06:21 A.M. Eastern Standard Time
Subj: Ur CW signal
 
Hi George,
 
Listening to you on 40 meters this morning in QSO with W8QP.
I tried to call you first but couldn't figure out which signal was your findamental
as you are radiating on the whole band 1.2khz apart.
Thought you might want to know about it before an OO sights in on you.
 
73,
Rick W3BI
Allentown PA