Date   

PigRig bandpass

random.path
 

Here is a screenshot of my PigRig audio output with wideband noise input:

http://s1225.photobucket.com/user/chipper74/media/pigrig_bandpass.jpg.html?sort=3&o=0

I've debated getting a HiPerMite or Elecraft AF1 kit to clean it up, but then I kind of like the idea of using it as built.

Chip


Re: Pig Rig troubleshooting question

Bill Cromwell
 

On Sun, 2013-03-31 at 23:42 +0000, cornhusker wrote:

OK, folks...I got mine all together, and it can hear (barely!) and
transmits (also barely!). I can hear it transmit in my Kenwood
receiver, and if I key my Kenwood, I can hear it in the PigRig. But,
connected to an antenna, the PigRig hears no outside signals or band
noise at all. Also in transmit there is no measurable RF output, yet
my big rig connected an an outside antenna hears it clearly, but only
about S5. I am able to peak its receiver from my big rig signal, set
the freq to 7030.7 and the keyer, offset, etc. works fine. Plenty of
loud sidetone audio in the speaker and good received audio from my big
rig transmitting a watt nearby into a dummy load or into outside
antenna. So, my guess is that all is fine except of maybe one of the
transformers...maybe T1? Any guesses?
Thanks!!
73 de Joe K0NEB
Hi Joe,

I don't have a rig like yours except that all of mine have wires, and
other gizmos between the wires, too. What about an accidental solder
bridge? What about a cold solder joint or one not even soldered at all?
Your local oscillator is working or you wouldn't be hearing your "big
rig" and it wouldn't be hearing your pig thingie. Cracked circuit board
trace (open)?

73,

Bill KU8H


Re: Pig Rig troubleshooting question

cornhusker
 

Charlie,
I get the 300mv of LO signal at pin 6 of the NE602, so my guess is the LO is OK, just not gettting enough coupling going on...that is why I am suspicious of one of the transformers, just gotta figure out which one.  Thanks!!  Have fun building!
73 de K0NEB

From: "Charlie , W5COV"
To: 4sqrp@...; cornhusker
Sent: Sunday, March 31, 2013 7:02 PM
Subject: Re: [4sqrp] Pig Rig troubleshooting question
Since I am waiting to finish mine , until we get the other crystals all I can do is offer a couple of suggestions .
 
We have the local oscillator which would be common to both of the major problems that you describe .
 
Once I finish mine , I plan on making up a voltage troubleshooting sheet to go with the schematic and board layout .
 
I do that these days whether it is homebrew or on the rare occasion when I build a kit . I often build extras of my projects for friends all over the country , so in the event of problems , it makes it easier for them and for me to help them troubleshoot if a problem does arise .
 
I have been quite impressed with this particular kit in that there have been very few , if any questions being asked about it once it is completed .
 
There have been several questions about the transformers during construction , but I find that pretty normal , even just winding a single layer toroid on many kits .
 
Perhaps some one already has a voltage troubleshooting diagram or list already started or completely available for the pig rig .
 
Looking forward to getting mine completed and putting it in its Ten Tec pen .
 
Does anyone know if Diz sold out of them ? I am also looking forward to the next run to see if I want to build another kit . I have plenty of equipment already , but an 80 meter version to go with this 40 meter version to leave out at the farm , when I am working and staying out there would be nice .
 
For some reason I haven't been on 80 meters in a couple of years or more , so it would also motivate me to get back on and check into some nets . Nice place to use a NVIS antenna , since I have never given one of them a try .
 
Charlie , W5COV
 

 
OK, folks...I got mine all together, and it can hear (barely!) and transmits (also barely!). I can hear it transmit in my Kenwood receiver, and if I key my Kenwood, I can hear it in the PigRig. But, connected to an antenna, the PigRig hears no outside signals or band noise at all. Also in transmit there is no measurable RF output, yet my big rig connected an an outside antenna hears it clearly, but only about S5. I am able to peak its receiver from my big rig signal, set the freq to 7030.7 and the keyer, offset, etc. works fine. Plenty of loud sidetone audio in the speaker and good received audio from my big rig transmitting a watt nearby into a dummy load or into outside antenna. So, my guess is that all is fine except of maybe one of the transformers...maybe T1? Any guesses?
Thanks!!
73 de Joe K0NEB


Re: Pig Rig troubleshooting question

Charlie Vest
 

Since I am waiting to finish mine , until we get the other crystals all I can do is offer a couple of suggestions .
 
We have the local oscillator which would be common to both of the major problems that you describe .
 
Once I finish mine , I plan on making up a voltage troubleshooting sheet to go with the schematic and board layout .
 
I do that these days whether it is homebrew or on the rare occasion when I build a kit . I often build extras of my projects for friends all over the country , so in the event of problems , it makes it easier for them and for me to help them troubleshoot if a problem does arise .
 
I have been quite impressed with this particular kit in that there have been very few , if any questions being asked about it once it is completed .
 
There have been several questions about the transformers during construction , but I find that pretty normal , even just winding a single layer toroid on many kits .
 
Perhaps some one already has a voltage troubleshooting diagram or list already started or completely available for the pig rig .
 
Looking forward to getting mine completed and putting it in its Ten Tec pen .
 
Does anyone know if Diz sold out of them ? I am also looking forward to the next run to see if I want to build another kit . I have plenty of equipment already , but an 80 meter version to go with this 40 meter version to leave out at the farm , when I am working and staying out there would be nice .
 
For some reason I haven't been on 80 meters in a couple of years or more , so it would also motivate me to get back on and check into some nets . Nice place to use a NVIS antenna , since I have never given one of them a try .
 
Charlie , W5COV
 


 

OK, folks...I got mine all together, and it can hear (barely!) and transmits (also barely!). I can hear it transmit in my Kenwood receiver, and if I key my Kenwood, I can hear it in the PigRig. But, connected to an antenna, the PigRig hears no outside signals or band noise at all. Also in transmit there is no measurable RF output, yet my big rig connected an an outside antenna hears it clearly, but only about S5. I am able to peak its receiver from my big rig signal, set the freq to 7030.7 and the keyer, offset, etc. works fine. Plenty of loud sidetone audio in the speaker and good received audio from my big rig transmitting a watt nearby into a dummy load or into outside antenna. So, my guess is that all is fine except of maybe one of the transformers...maybe T1? Any guesses?
Thanks!!
73 de Joe K0NEB


Pig Rig troubleshooting question

cornhusker
 

OK, folks...I got mine all together, and it can hear (barely!) and transmits (also barely!). I can hear it transmit in my Kenwood receiver, and if I key my Kenwood, I can hear it in the PigRig. But, connected to an antenna, the PigRig hears no outside signals or band noise at all. Also in transmit there is no measurable RF output, yet my big rig connected an an outside antenna hears it clearly, but only about S5. I am able to peak its receiver from my big rig signal, set the freq to 7030.7 and the keyer, offset, etc. works fine. Plenty of loud sidetone audio in the speaker and good received audio from my big rig transmitting a watt nearby into a dummy load or into outside antenna. So, my guess is that all is fine except of maybe one of the transformers...maybe T1? Any guesses?
Thanks!!
73 de Joe K0NEB


Re: sub

Donald Kelly
 

I was going to suggest the J310 also. There are some characteristics of a standard J310 that make them a little “better” than the MPF102. One being lower input C and often a higher dissipation.  http://www.mouser.com/ds/2/308/J309-D-109346.pdf         

 

 

Not all the old mpf102’s were same. Radio Shack used to buy them from various foreign manufacturers. None of them looked the same, often unmarked and the characteristics were often slightly different. But not different enough to make any change in the circuit. I used them for Oscillators, buffers and switches and could sub a J310 for any of these. Precise characteristics are not necessary for many of these applications.

 

 

I like Fairchild or at least I have quite a few.

http://www.ebay.com/itm/100x-J310G-Fairchild-N-Channel-JFET-Transistor-J310-RF-VHF-UHF-Amplifier-TO-92-/150779353107?pt=LH_DefaultDomain_0&hash=item231b265813

 

K5UOS

 

 

From: 4sqrp@... [mailto:4sqrp@...] On Behalf Of Jerry Haigwood
Sent: Saturday, March 30, 2013 5:07 PM
To: 4sqrp@...; 'Barney'
Subject: RE: Re: [4sqrp] sub

 

 

You can also check with Futurlec.com.  However, the part will be coming from Hong Kong so it will take about 20 days to get here.  B & G micro in Dallas has a number of FETs also.  BTW, I quit using the MPF 102 a long time ago.  For RF I typically use the J310 or the 2N5486.  I have a bunch of 2N3819s that I use when I am not too concerned about performance.

Jerry W5JH

"building something without experimenting is just solder practice"

 

 

 

From: 4sqrp@... [mailto:4sqrp@...] On Behalf Of Barney
Sent: Saturday, March 30, 2013 11:46 AM
To: 4sqrp@...
Subject: Fwd: Re: [4sqrp] sub

 

 

 





Hi Jerry;

     Where do you get them?  I had heard that the 102 was obsolete, and Mouser lists them that way and they don't show up
at Allied Electronics.  Jameco does have them!

     Thanks for the info on the subs..

Barney


On 3/30/2013 10:40 AM, Jerry Haigwood wrote:

Why do you need a sub?  The MPF102 is still available.  If you really want a sub, you can use just about any n channel JFET as a sub.  The MPF102 is the 2N2222 of the JFET world.  You could use a 2N3819, 2N5484, 2N5485, 2N5486, etc.

Jerry W5JH

"building something without experimenting is just solder practice"

 

 

 

From: 4sqrp@... [mailto:4sqrp@...] On Behalf Of Barney
Sent: Saturday, March 30, 2013 10:26 AM
To: 4sqrp@...
Subject: [4sqrp] sub

 

 


I wonder what xstr will sub for a MPF102?

Barney

 

 


RM to RM

Mike
 

Hello everyone. I had a real good night using my Rockmite 20. 3 2X QRPs back to back. Sweet! The icing on the cake was a call from N3RUA vacationing in Moad, UT and using his RM 20 at .3W. My first RM-RM and his also. That also makes my first QRPP-QRPP QSO. What a great hobby. An old fashioned QSL card is forthcoming. :)

Hams are always looking for new avenues to explore the ether. QRP is one of them. It also brings back the days of home-brewing albeit mostly kit form now. That really doesn't matter because way back when most of us would build our home-brewed stuff from plans published in CQ or QST anyway.

On the subject of kits, my Pig Rig arrived last week and I'm anxious to get it up on the air. It will be awhile because I already have two projects ahead of it....and I'm real slow.

I really enjoy reading the posts of this forum...good stuff.

72
Mike Morris
KF5RAU


Re: PigRig and HPM

random.path
 

I did a little test with my PigRig #147. I attached an Elecraft Ngen broadband noise generator to the antenna input, and ran the audio output into my Signalink USB sound "card". Looking at the output with Spectrogram, you can see the filter shape.

I'll try to provide a link to a screenshot later, but it looks like the ultimate rejection of the crystal filter is only about 30db at audio frequencies above the passband. It has very wide skirts too. This means you'll hear plenty of signals outside of the 500 Hz passband, but hopefully they won't be too intrusive.

Given the simplicity and cost of this little transceiver, I'm certainly not going to complain, but you can't expect too much!

Chip

--- In 4sqrp@..., Stephen Roberts <steverob@...> wrote:

I just fired up my pig rig for the first time and still haven't tuned it in but it sends and receives close to the target freq. I heard a lot of background noise and I think the bandpass needs tweaking as there seemed to be a number of stations on the freq, so I think that needs some adjustment. I have a hyper mite and haven't used it, but as I just listened to 40 with the pig rig, I immediately thought it might be a great addition. Glad to hear that you tried one. Can you tell me how you have your Hipermite set up?

73
Steve
W1SFR



On Mar 30, 2013, at 7:04 PM, WA0ITP wrote:

I just stuck the Hi_per_Mite on the pigrig. Man does it ever clean up the
sidetone. Lots of QRN on 40 today so it's probobly not a fair test of the HPM
but it sounds vy good so far.

Anyone else using this combo today?

----------------------------------
I love this radio stuff !
72 WAØITP
www.wa0itp.com
www.4sqrp.com
www.qrpspots.com


Re: Piggie mine

Johnny AC0BQ
 

CONGRATS JIM!
Welcome to the 4SQRP/PIG RIG CLUB.
72
Johnny AC0BQ


On Sun, Mar 31, 2013 at 8:54 AM, kd5kj <brookranger@...> wrote:
 

Piggie #209 is squeeling fine, glad she's mine.
Cu ay OZARKCON,,,

Jim kd5kj



Piggie mine

kd5kj <brookranger@...>
 

Piggie #209 is squeeling fine, glad she's mine.
Cu ay OZARKCON,,,

Jim kd5kj


Re: PIG RIG SN 168 HAS COME TO LIFE

Johnny AC0BQ
 

Congrats Bert 
Signals were weak on 40 but good copy
Nice tone and on freq.
72
Johnny
AC0BQ


On Saturday, March 30, 2013, qrpbert wrote:
 

Well #168 has officially squealed and been heard by Johnny AC0BQ, and the little fella successfully detected Johnny's signal and relayed it to my ears like a good little pig should, this was in spite of my best efforts to make it difficult, and after replacing the parts I managed to destroy, and adding a wire or two to replace the traces I mangled. Many thanks to DIZ for sending me a care package of replacement parts at his cost, I tried to pay him more and he wouldn't take it, excellent customer support, and an honest business man. Now I have to put it in its pen, and move it to 7.122 when the rocks arrive. I wonder what I can do to make that difficult, I am sure something will come to me, it always does.


Re: Te-Ne-Ke paddle

Tim N9PUZ
 

On 3/30/2013 4:30 PM, WA0ITP wrote:
Been playing with a new Te-Ne-Ke, an entirely different paddle design, with
different feel.
I think Dennis Foster KK5PY sold these, or something similar, many years
ago at OzarkCon in Joplin.

Anyone else have one and if so how do you like it?
I bought one from Dennis a long time ago. Wonder where I have it stashed away?

Tim N9PUZ


Chkd 40M b4 goin to bed

David Martin <davemrtn@...>
 

Plugged in the Rockmite 40 to listen to 7040 for a minute before going to bed.

Heard a bunch of signals and a really strong one 'on freq', but I just couldn't listen long enough to catch callsign, etc.

There's just something very discomforting about wearing a pair of headphones connected to a radio connected to a G5RV during a BIG Thunderstorm !!!

--
*David Martin - K5DCM ---o0o---
Mountain Home, Arkansas*
Guns don't kill people, any more than spoons & forks cause obesity.
Automobile efficiency is measured in MPG, NOT Gallons per Mile.
Amateur Radio efficiency, fun & skill is measured by Miles Per Watt, NOT Watts per Mile.


Re: sub

Barney <barneyro@...>
 

Thanks Nick. 

     Here is one I've bought from before.  They have free shipping and the prices are pretty good.  I wonder about the quality at times.  Most of the things we buy are from over there anyway though.

http://www.taydaelectronics.com/catalogsearch/result/?q=mpf102

     I had a project that called for 102's and I had none.  I didn't know what to sub for them as I haven't had a lot of experience building with solid state




On 3/30/2013 7:11 PM, Nick-WA5BDU wrote:
 

What I've heard from the smart guys is that the MPF102 is specified with a pretty broad range of parameters, so lots of other JFETs will fit between those ditches.

I'm liking the 2N3819 too.  I bought 25 from Mouser for 9 cents apiece a while back.

A quick eBay check shows quite a few MPF102s.  One outfit I'm familiar with is Nightfire Electronics.  They sell a "kit" of 10 MPF102s for $8.99 and throw in a bunch of other components and a little perf board to fill out the "kit" idea.  Not bad if your junk box is a little light.

http://www.ebay.com/itm/MPF102-RF-FET-Transistor-Design-Kit-1-1600-/370291579514?pt=LH_DefaultDomain_0&hash=item5637191a7a

72-

Nick, WA5BDU

 

 


I wonder what xstr will sub for a MPF102?

Barney

 





Re: Soldering station advice

Dan Reynolds
 

Depending on how much a hurry you are and what hamfests you have access to you might look around for a Metcal. I traded some stuff for one and it is the best solder station I've ever touched. I've used some high end Wellers and an old but good Unger (I'm not a tech or an expert). But the Metcal is a solid dependable setup. And is very expandable depending on which model you get.
I could NEVER afford to buy one new. But there are quite a few in the used market and especially with the downturn in the economy.
It is definitely the Rolls Royce of soldering stations...
73
Dan -- KB9JLO


Re: PIG RIG SN 168 HAS COME TO LIFE

WA0ITP
 

Congrats Bert!

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

----- Original Message -----
From: "qrpbert" <e1dslr@...>
To: <4sqrp@...>
Sent: Saturday, March 30, 2013 8:48 PM
Subject: [4sqrp] PIG RIG SN 168 HAS COME TO LIFE


| Well #168 has officially squealed and been heard by Johnny AC0BQ, and the
little fella successfully detected Johnny's signal and relayed it to my ears
like a good little pig should, this was in spite of my best efforts to make it
difficult, and after replacing the parts I managed to destroy, and adding a wire
or two to replace the traces I mangled. Many thanks to DIZ for sending me a care
package of replacement parts at his cost, I tried to pay him more and he
wouldn't take it, excellent customer support, and an honest business man. Now I
have to put it in its pen, and move it to 7.122 when the rocks arrive. I wonder
what I can do to make that difficult, I am sure something will come to me, it
always does.
|
|
|
| ------------------------------------
|
| 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: YU5A

Dan Reynolds
 

Thanks guys. I've been dying to get 1000 miles per watt on SSB.
And yes, Wayne, that darn old W3EDP wire did it again. I was actually going to go outside today and put that 9:1 balun in. I got too busy playing in the CQ WPX contest (not serious just couldn't resist the DX).
I must've had a half a dozen Cuba contacts!
Fun day. Now tomorrow I need to work on CW. Maybe after I put in the balun? Ha, ha!

73
Dan -- KB9JLO


PIG RIG SN 168 HAS COME TO LIFE

Robert
 

Well #168 has officially squealed and been heard by Johnny AC0BQ, and the little fella successfully detected Johnny's signal and relayed it to my ears like a good little pig should, this was in spite of my best efforts to make it difficult, and after replacing the parts I managed to destroy, and adding a wire or two to replace the traces I mangled. Many thanks to DIZ for sending me a care package of replacement parts at his cost, I tried to pay him more and he wouldn't take it, excellent customer support, and an honest business man. Now I have to put it in its pen, and move it to 7.122 when the rocks arrive. I wonder what I can do to make that difficult, I am sure something will come to me, it always does.


Re: PigRig and HPM

Herb Graeber
 

Thanks for the info Terry.  The Pig Rig's default sidetone
freq of about 625 cycles is perfect for my ears.  And,
like you, I find 700 to be a bit high.  Good to know that
it may take a bit more than 15 pf to get the offset to
700 cycles.  Fine on lowering the center freq of the HPM
but it will be easier for me to raise the offset of the Pig
Rig.  Everyone needs a Pig Rig and HPM.  :>)
 
72...Herb K5HG
 
 

----- Original Message -----
From: WA0ITP
Sent: Saturday, March 30, 2013 8:08 PM
Subject: Re: [4sqrp] PigRig and HPM

I mistyped that Herb, sri.  The sidetone is 560 comparing a computer audio generator that I  use.  The HPM knocks it down a fair amount but it's useable.   I did change C27 to 15p in order to get enough transmit offset tho.  My sidetone is set with the number 4 on the F menu selection Mostly because I like a lower tone.  I put it there because that about what I get for the transmit offset, maybe a bit more.   The sidetone isn't related to the xmit offset.  You can make it match the HPM if you wish. 
 
If you wish you can also put the center of the HPM's bandpass where you want it.  There's a table of values on the kit's home page.
 
When, I take the pigrig out of the case, I'll bump up the offset some more.  Maybe tack a 3.3 or 4.7p across the 15p at C27 and see where that takes the offset.  Then maybe raise the sidetone some more, but maybe not.  The next step for me is to add crystal sockets so I can put it on 7122.
 
I did play with the sidetone freq and changing it to 714 cycles (#2) made a heckuva difference in it's volume. Too much for me so I changed it back to 625 and the volume out of the HPM is better for my old ears.
 
Hope this helps, have fun.

----------------------------------
I love this radio stuff !
72   WAØITP
www.wa0itp.com
www.4sqrp.com
www.qrpspots.com
 
 
----- Original Message -----
To: WA0ITP
Sent: Saturday, March 30, 2013 7:39 PM
Subject: Re: [4sqrp] PigRig and HPM

Great.  I have been wanting to use the HPM with
the Pig Rig.  I'll change out the 12pf and order another
HPM.  I'm using HPM with the Ten Tec 1254 and that
makes it a decent CW RX except for that 2.6 KC wide
front end which messes things up with a strong station
in the passband while you are trying to copy a peanut
whistle.  Thanks.
 
72...Herb K5HG
 
----- Original Message -----
From: WA0ITP
Sent: Saturday, March 30, 2013 7:22 PM
Subject: Re: [4sqrp] PigRig and HPM

Yes its close enough, about 660 or so.

----------------------------------
I love this radio stuff !
72   WAØITP
www.wa0itp.com
www.4sqrp.com
www.qrpspots.com
 
 
----- Original Message -----
Sent: Saturday, March 30, 2013 6:38 PM
Subject: Re: [4sqrp] PigRig and HPM

You must have changed out the 12 pf with the 15pf???
Is that enough to raise the rx tone to 700 cycles??
Using the 12 pf and with my TX adjusted to 7030.690 -
7030.7 my rx tone is about 450 to maybe 500 at the most.
 
72...Herb K5HG
 
 
----- Original Message -----
From: WA0ITP
Sent: Saturday, March 30, 2013 6:04 PM
Subject: [4sqrp] PigRig and HPM

 

I just stuck the Hi_per_Mite on the pigrig. Man does it ever clean up the
sidetone. Lots of QRN on 40 today so it's probobly not a fair test of the HPM
but it sounds vy good so far.

Anyone else using this combo today?

----------------------------------
I love this radio stuff !
72 WAØITP
www.wa0itp.com
www.4sqrp.com
www.qrpspots.com

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Re: QRQ, STRANGE IT IS

Walter - K5EST
 

QRQ is alive and well. In the Ozark QRP Banner, we have Chuck -
AA0HW, as a guest author. He is one of the QRQ leaders and is the keeper of the Internet I-QRQ world. Chuck, is a big fan of our CW filter kit. QRQ has some great video productions on U-Tube.

Last I knew he has the Bible on CD at 100wpm CW and that is his work commute listening music.....amazing!

Looking forward to OzarkCon!

72/73....Walter . K5EST

On Mar 30, 2013 5:28 PM, "Phil Anderson" <aldenmcduffie@...> wrote:
 

Hi Guys! Just a week till OzarkCon! Wheeeeee.
 
I was googling the web a couple of days ago - that infinite web - and again ran across a part of our hobby called QRQ: yes it is the cousin of QRS but much faster, hi.
 
Anyway, did some googling and ran across (again) a reference to ZART, "Zen and Art of Radio Telegraphy" by Carlo Consoli, IK0YGJ. It's a long read but skimmed a bit and ran across a discussion on the difference in sound at 50 to 60 WPM between English and (for example) German. Fascinating! Since German has lots of ICH, BER, and VER letter combinations, a conversation in German sounds different that say an English one. Strange and interesting.
 
Of course this is the claim of the author, not me; I'm TOO SLOW. 
 
I did download some sound files from N5WDI's "QRQ CENTRAL" website and listened to the most popular conversational words - he claims are YOU, I, TO, THE, A, AND, THAT, IT, OF and ME. They certainly have their own rythms!
 
Guess I'll get out my old German textbook and copy out say ten sentences....and repeat them in Engish, and then compare the "general" sound of each code file. A number of code practice programs support text input with code output.
 
If anyone else is interested in digging further too, grab me at OzarkCon and we can chat. Keep in mind that this is all new to me.
 
UNK PHIL, W0XI