Date   

Wanted SS welding rod

Don Jackson
 

Now here's something different for a "want" on this list...
I am seeking a stainless steel welding rod that is #316 or #316L and 3/32" diameter. Probably just one or two 12" rods would be enough, and in fact it could be chopped into two 6" pieces for easier mailing. MUST be that type and diameter.

If you have this animal, please email me off-list donj at ae5k dot us. Can send funds via PayPal or personal check.

Yes, rather indirectly it does have something to do with QRP. My alternative is to order it in one pound quantities, much more than I would probably ever use.

Don AE5K


Re: The KX3, Raspberry Pi, and FLDIGI

Ray Cadmus
 

On 04/29/2013 03:24 PM, Jim Sheldon wrote:
 
Hey Guys,
All part of the original plan.  Right now I'm trying to come up with some screen shots  but so far haven't figured out how to do a screen capture of images from the Pi without using a camera to take pix of the screen.  Any ideas Walter?
 
Jim.



Re: The KX3, Raspberry Pi, and FLDIGI

Walter - K5EST
 

Jim, probably use your camera. That is way easier than importing a screen shot linux program. I can always clip off the monitor frame panel.

Thanks for all your help. We really like exclusive articles for the Banner!

72....Walter . K5EST

On Apr 29, 2013 3:24 PM, "Jim Sheldon" <w0eb@...> wrote:
 

Hey Guys,
All part of the original plan.  Right now I'm trying to come up with some screen shots  but so far haven't figured out how to do a screen capture of images from the Pi without using a camera to take pix of the screen.  Any ideas Walter?
 
Jim

> Wayne, you took the words right outta my mouth!!!
>
> Congrats Jim, nice to see a 4 state member figure out things before
> the geeks!
>
> 72....Walter . K5EST
>
>
> On Apr 29, 2013 1:59 PM, "Wayne Dillon" <wayne.dillon@...>
> wrote:
>>
>>
>> Jim,
>> What about writing the thing up for "The Banner"? sure would make
>> interesting reading...
>>
 


Re: Pig Rig Question

Wendell Morrill
 

Lee- my pigs work fine without the toroid. The function is to reduce BCI
in case that you live near a big station. Also, I didn't bother to use
shielded cable for hookup wires as suggested in the instructions.
Wendell N7WM

I'm about to get #157 out into the pen and oinking, but I am stumped.
The Parts List calls for L7 a black FT50-75 toroid. I have the toroid in
my
kit, but I cannot find out its location on the board or the instructions
as
to how to wind it.

Can anybody give me a hand?

73 de Lee
KM4YY


Re: The KX3, Raspberry Pi, and FLDIGI

Jim Sheldon
 

Hi Jon,
import isn't available for the Debian "Wheezy" version of Linux that the little Raspberry Pi uses, or if it is, I haven't been able to find it.  I did, however find a freebie out there called "Shutter" that is installing right now.  "sudo apt-get install shutter" hauled it in, and installed it so it ought to work.  Right now, it's out on the internet updating it's plug-ins and we'll see if it works after everything finishes.  I haven't figured out how to get an installed package iconized onto the graphical desktop on the Pi yet though so I have to run it through a terminal window.  Still working on that one.  When I got the Pi OS it was set up to boot into the GUI rather than to the command line prompt.  Not wanting to mess up what's currently working, I've left it that way hi hi.  I'm still a relative newbie to installing Linux programs.
 
Jim

> I use 'import' on my linux system. Don't know how standard your
> distribution is. If you don't have it, you might be able to
> download it. 
>
>
> John AA0VE
>
> Sent from my iPod 
>
> On Apr 29, 2013, at 3:24 PM, Jim Sheldon wrote:
>>
>>
>> Hey Guys,
> All part of the original plan.  Right now I'm trying to come up
> with some screen shots  but so far haven't figured out how to do a
> screen capture of images from the Pi without using a camera to take
> pix of the screen.  Any ideas Walter?
>
> Jim
>
>>
>> Wayne, you took the words right outta my mouth!!!
>>
>> Congrats Jim, nice to see a 4 state member figure out things
>> before the geeks!
>>
>> 72....Walter . K5EST
>>
>>
>> On Apr 29, 2013 1:59 PM, "Wayne Dillon"
>> wrote:
>>>
>>>
>>> Jim,
>>> What about writing the thing up for "The Banner"? sure would
>>> make interesting reading...
>
>
>


Re: PigRig Pen Problem

Scotty Long <nu0s@...>
 

Lee,

I can send you a thin aluminum overlay say .020 to .032. Double sticky in place after drilling and cover it with the piggy sticker...Let me know I'll send it to the QRZ address. Please give me the dimensions...

72/73/Scotty/NUØS



Johnny Matlock wrote:

 

Ge Lee

Similar to Johns idea, try swapping ends with labels and holes????
Gl
Johnny AC0BQ

On Monday, April 29, 2013, Lee Mairs (SAG) wrote:
 

I screwed up. I printed off my label but didn't notice that the printer box
had been checked adjust to fit screen. I drilled all the holes very
carefully using this print out as a template. I then decided to use a 65#
stock sheet of light blue paper for the actual label. This time I noticed
the "Fit to.." and changed it to "Actual Size". There was a 1/4 inch
difference between the two (Actual Size being bigger.)

So much for that enclosure. This morning I've spent calling each and every
number on the TenTec Contact List to re order a charcoal TP-19 pen, but
every singlenumber has been busy. I tried to order firs by their web site,
but the checkout process returned an Error Message.

Is TenTec still alive out there?

Lee Mairs
KM4YY
Romney, WV 26757


Re: PigRig Pen Problem

Johnny AC0BQ
 

Ge Lee
Similar to Johns idea, try swapping ends with labels and holes????
Gl
Johnny AC0BQ

On Monday, April 29, 2013, Lee Mairs (SAG) wrote:
 

I screwed up. I printed off my label but didn't notice that the printer box
had been checked adjust to fit screen. I drilled all the holes very
carefully using this print out as a template. I then decided to use a 65#
stock sheet of light blue paper for the actual label. This time I noticed
the "Fit to.." and changed it to "Actual Size". There was a 1/4 inch
difference between the two (Actual Size being bigger.)

So much for that enclosure. This morning I've spent calling each and every
number on the TenTec Contact List to re order a charcoal TP-19 pen, but
every singlenumber has been busy. I tried to order firs by their web site,
but the checkout process returned an Error Message.

Is TenTec still alive out there?

Lee Mairs
KM4YY
Romney, WV 26757


Re: The KX3, Raspberry Pi, and FLDIGI

John Lonigro
 

I use 'import' on my linux system. Don't know how standard your distribution is. If you don't have it, you might be able to download it. 

John AA0VE

Sent from my iPod 

On Apr 29, 2013, at 3:24 PM, Jim Sheldon <w0eb@...> wrote:

 

Hey Guys,
All part of the original plan.  Right now I'm trying to come up with some screen shots  but so far haven't figured out how to do a screen capture of images from the Pi without using a camera to take pix of the screen.  Any ideas Walter?
 
Jim

> Wayne, you took the words right outta my mouth!!!
>
> Congrats Jim, nice to see a 4 state member figure out things before
> the geeks!
>
> 72....Walter . K5EST
>
>
> On Apr 29, 2013 1:59 PM, "Wayne Dillon" <wayne.dillon@...>
> wrote:
>>
>>
>> Jim,
>> What about writing the thing up for "The Banner"? sure would make
>> interesting reading...
>>
 


Re: PigRig Pen Problem

WA0ITP
 

Lee,

I'm sri you'd had problems drilling the TP-19. TGo help others avoid that in
the future, I just added this note to the label files.
Before printing with your PDF program, make sure to select NONE in the "Scale"
or "Scaling Type" box.

I thought about adding this some time ago, but it got lost in Ocon preparations.

I feel responsible for your incorrect hole locations, and have an extra TPC-19
that I'll send it to you. Are you good on qrz.com?
----------------------------------
I love this radio stuff !
72 WA�ITP
www.wa0itp.com
www.4sqrp.com

----- Original Message -----
From: "Lee Mairs (SAG)" <lmairs@sagcorp.com>
To: <4sqrp@yahoogroups.com>
Sent: Monday, April 29, 2013 12:47 PM
Subject: [4sqrp] PigRig Pen Problem


|I screwed up. I printed off my label but didn't notice that the printer box
| had been checked adjust to fit screen. I drilled all the holes very
| carefully using this print out as a template. I then decided to use a 65#
| stock sheet of light blue paper for the actual label. This time I noticed
| the "Fit to.." and changed it to "Actual Size". There was a 1/4 inch
| difference between the two (Actual Size being bigger.)
|
| So much for that enclosure. This morning I've spent calling each and every
| number on the TenTec Contact List to re order a charcoal TP-19 pen, but
| every singlenumber has been busy. I tried to order firs by their web site,
| but the checkout process returned an Error Message.
|
| Is TenTec still alive out there?
|
| Lee Mairs
| KM4YY
| Romney, WV 26757
|
|
|
|
| ------------------------------------
|
| 4SQRP Website: http://4sqrp.com
| OzarkCon is coming April 4-5, 2014 in Branson, MO
| View Details at http://www.ozarkcon.com/index.phpYahoo! Groups Links
|
|
|


Re: The KX3, Raspberry Pi, and FLDIGI

Jim Sheldon
 

Hey Guys,
All part of the original plan.  Right now I'm trying to come up with some screen shots  but so far haven't figured out how to do a screen capture of images from the Pi without using a camera to take pix of the screen.  Any ideas Walter?
 
Jim

> Wayne, you took the words right outta my mouth!!!
>
> Congrats Jim, nice to see a 4 state member figure out things before
> the geeks!
>
> 72....Walter . K5EST
>
>
> On Apr 29, 2013 1:59 PM, "Wayne Dillon"
> wrote:
>>
>>
>> Jim,
>> What about writing the thing up for "The Banner"? sure would make
>> interesting reading...
>>
 


Re: PigRig Pen Problem

Lee Mairs (SAG) <lmairs@...>
 

John -
Thanks for the idea. I will try that this evening since I've been calling TenTec all day and getting busy signals for every number on their web page! tried ordering from the website, but the Check Out procedure keeps giving me a Loading Error please try again.

Has anybody else had this problem?
73 de Lee
KM4YY

On 4/29/2013 2:32 PM, John R. Lonigro wrote:
Lee:

I probably shouldn't admit this to the group, but I've been known to
drill holes in the wrong place as well (I assume most of us have done
this at one time or another). However, there might be a fix if you plan
to cover the ends with paper. If the wrong holes don't overlap the right
ones, you can just drill the right ones and the blue paper will cover up
the errors. If they do overlap, you might try switching around the front
and back of the case, to minimize the overlap. I'll also put masking
tape over the wrong holes, set the case on end, and pour epoxy into the
holes. When it sets, I remove the tape and lightly sand the cover. Once
the paper label is applied, nobody (except you) will know.

Note: If the bad holes and the good holes do overlap, you might still be
able to use the case, but probably won't be able to fill the bad hole
with epoxy. At least it's worth a try before ordering a new case.

72,

John AA0VE

On 04/29/2013 12:47 PM, Lee Mairs (SAG) wrote:
I screwed up. I printed off my label but didn't notice that the
printer box
had been checked adjust to fit screen. I drilled all the holes very
carefully using this print out as a template. I then decided to use a 65#
stock sheet of light blue paper for the actual label. This time I noticed
the "Fit to.." and changed it to "Actual Size". There was a 1/4 inch
difference between the two (Actual Size being bigger.)

So much for that enclosure. This morning I've spent calling each and
every
number on the TenTec Contact List to re order a charcoal TP-19 pen, but
every singlenumber has been busy. I tried to order firs by their web
site,
but the checkout process returned an Error Message.

Is TenTec still alive out there?

Lee Mairs
KM4YY
Romney, WV 26757


------------------------------------

4SQRP Website: http://4sqrp.com
OzarkCon is coming April 4-5, 2014 in Branson, MO
View Details at http://www.ozarkcon.com/index.phpYahoo! Groups Links





Re: The KX3, Raspberry Pi, and FLDIGI

Walter - K5EST
 

Wayne, you took the words right outta my mouth!!!

Congrats Jim, nice to see a 4 state member figure out things before the geeks!

72....Walter . K5EST



On Apr 29, 2013 1:59 PM, "Wayne Dillon" <wayne.dillon@...> wrote:
 

Jim,
What about writing the thing up for "The Banner"? sure would make interesting reading...
72/3 es God Bless de Wayne - KC0PMH


On Mon, Apr 29, 2013 at 1:42 PM, Jim Sheldon <w0eb@...> wrote:
 

I've been tinkering with one of those little "Raspberry Pi", Linux based, credit card sized computers trying to get it to run the Linux version of FLDIGI reliably.  Even the "B" model which I have has a processor speed that's a bit on the wimpy side (700MHz) when it comes to running sound card programs, especially FLDIGI  After a bit of parameter tweaking in FLDIGI, and a fairly inexpensive USB "dongle" sound adapter, the ICUSBAUDIO, from a company called StarTech (www.startech.com), I was able to get it working this morning.  Had a nice QSO with W2RMG on 20 Meter PSK31 using my KX3 at 5 watts out with the Pi running FLDIGI.  It didn't miss a character even with only a faint trace on the waterfall.
 
Some guys were getting FLDIGI to occasionally run by overclocking the Pi to 900+ MHz and I tried that at first with a really cheap USB sound adapter with very sketchy results.  It would send fine, but decoding was very erratic on both PSK31 and RTTY.  After swapping sound "dongles" this morning and telling FLDIGI to shut off "multi-channel" decoding plus inform it that it was running on a "slow" computer (configuration menu items) all of a sudden it started working nicely.  Turns out multi-channel decode is defaulted to ON and even if you minimize the window for it, it still remains on unless you deliberately disable it.  That appears to have been the major hangup to getting it working properly on the Pi due to seriously overtaxing the available CPU resources.  By using "Slow Computer" and no multi-channel, it's now working with everything set to normal speed and that makes the Pi run a lot cooler with very little chance of corrupting the data on the MicroSD card.  
 
I know some of you have also been playing with the "Pi" so I thought I'd share these results in case anyone else wanted to try it.  
 
Jim - W0EB
 
 
 
 




--
http://www.qsl.net/kc0pmh/   Under construction but please visit anyway.
 
QRP -  EFFICIENCY AND SKILL, NOT POWER. 
 
I'm British by birth but American by CHOICE!

Jesus came to pay a debt He didn't owe because we owe a debt we cannot pay...

The Lord bless you and keep you
The Lord make His face shine upon you, and be gracious unto you
The Lord lift up his contenance upon you and give you peace.

God Bless from Wayne Dillon - KC0PMH

Joshua 24:14-15
2 Cor 5:17
1 Jn 2:17
 

4 State QRP Group NCS - 40m & 160m
4SQRP #95
FPQRP #342 (Flying Pigs QRP Club)
G-QRP-C #11504
NAQCC # 0759
QRP-ARCI #11505
SKCC #1155
SOC #848
30MDG#1176
NEQRP #693
GORC #192


Re: The KX3, Raspberry Pi, and FLDIGI

Wayne Dillon
 

Jim,
What about writing the thing up for "The Banner"? sure would make interesting reading...
72/3 es God Bless de Wayne - KC0PMH


On Mon, Apr 29, 2013 at 1:42 PM, Jim Sheldon <w0eb@...> wrote:
 

I've been tinkering with one of those little "Raspberry Pi", Linux based, credit card sized computers trying to get it to run the Linux version of FLDIGI reliably.  Even the "B" model which I have has a processor speed that's a bit on the wimpy side (700MHz) when it comes to running sound card programs, especially FLDIGI  After a bit of parameter tweaking in FLDIGI, and a fairly inexpensive USB "dongle" sound adapter, the ICUSBAUDIO, from a company called StarTech (www.startech.com), I was able to get it working this morning.  Had a nice QSO with W2RMG on 20 Meter PSK31 using my KX3 at 5 watts out with the Pi running FLDIGI.  It didn't miss a character even with only a faint trace on the waterfall.
 
Some guys were getting FLDIGI to occasionally run by overclocking the Pi to 900+ MHz and I tried that at first with a really cheap USB sound adapter with very sketchy results.  It would send fine, but decoding was very erratic on both PSK31 and RTTY.  After swapping sound "dongles" this morning and telling FLDIGI to shut off "multi-channel" decoding plus inform it that it was running on a "slow" computer (configuration menu items) all of a sudden it started working nicely.  Turns out multi-channel decode is defaulted to ON and even if you minimize the window for it, it still remains on unless you deliberately disable it.  That appears to have been the major hangup to getting it working properly on the Pi due to seriously overtaxing the available CPU resources.  By using "Slow Computer" and no multi-channel, it's now working with everything set to normal speed and that makes the Pi run a lot cooler with very little chance of corrupting the data on the MicroSD card.  
 
I know some of you have also been playing with the "Pi" so I thought I'd share these results in case anyone else wanted to try it.  
 
Jim - W0EB
 
 
 
 




--
http://www.qsl.net/kc0pmh/   Under construction but please visit anyway.
 
QRP -  EFFICIENCY AND SKILL, NOT POWER. 
 
I'm British by birth but American by CHOICE!

Jesus came to pay a debt He didn't owe because we owe a debt we cannot pay...

The Lord bless you and keep you
The Lord make His face shine upon you, and be gracious unto you
The Lord lift up his contenance upon you and give you peace.

God Bless from Wayne Dillon - KC0PMH

Joshua 24:14-15
2 Cor 5:17
1 Jn 2:17
 

4 State QRP Group NCS - 40m & 160m
4SQRP #95
FPQRP #342 (Flying Pigs QRP Club)
G-QRP-C #11504
NAQCC # 0759
QRP-ARCI #11505
SKCC #1155
SOC #848
30MDG#1176
NEQRP #693
GORC #192


The KX3, Raspberry Pi, and FLDIGI

Jim Sheldon
 

I've been tinkering with one of those little "Raspberry Pi", Linux based, credit card sized computers trying to get it to run the Linux version of FLDIGI reliably.  Even the "B" model which I have has a processor speed that's a bit on the wimpy side (700MHz) when it comes to running sound card programs, especially FLDIGI  After a bit of parameter tweaking in FLDIGI, and a fairly inexpensive USB "dongle" sound adapter, the ICUSBAUDIO, from a company called StarTech (www.startech.com), I was able to get it working this morning.  Had a nice QSO with W2RMG on 20 Meter PSK31 using my KX3 at 5 watts out with the Pi running FLDIGI.  It didn't miss a character even with only a faint trace on the waterfall.
 
Some guys were getting FLDIGI to occasionally run by overclocking the Pi to 900+ MHz and I tried that at first with a really cheap USB sound adapter with very sketchy results.  It would send fine, but decoding was very erratic on both PSK31 and RTTY.  After swapping sound "dongles" this morning and telling FLDIGI to shut off "multi-channel" decoding plus inform it that it was running on a "slow" computer (configuration menu items) all of a sudden it started working nicely.  Turns out multi-channel decode is defaulted to ON and even if you minimize the window for it, it still remains on unless you deliberately disable it.  That appears to have been the major hangup to getting it working properly on the Pi due to seriously overtaxing the available CPU resources.  By using "Slow Computer" and no multi-channel, it's now working with everything set to normal speed and that makes the Pi run a lot cooler with very little chance of corrupting the data on the MicroSD card.  
 
I know some of you have also been playing with the "Pi" so I thought I'd share these results in case anyone else wanted to try it.  
 
Jim - W0EB
 
 
 
 


Re: PigRig Pen Problem

John Lonigro
 

Lee:

I probably shouldn't admit this to the group, but I've been known to drill holes in the wrong place as well (I assume most of us have done this at one time or another). However, there might be a fix if you plan to cover the ends with paper. If the wrong holes don't overlap the right ones, you can just drill the right ones and the blue paper will cover up the errors. If they do overlap, you might try switching around the front and back of the case, to minimize the overlap. I'll also put masking tape over the wrong holes, set the case on end, and pour epoxy into the holes. When it sets, I remove the tape and lightly sand the cover. Once the paper label is applied, nobody (except you) will know.

Note: If the bad holes and the good holes do overlap, you might still be able to use the case, but probably won't be able to fill the bad hole with epoxy. At least it's worth a try before ordering a new case.

72,

John AA0VE

On 04/29/2013 12:47 PM, Lee Mairs (SAG) wrote:

I screwed up. I printed off my label but didn't notice that the printer box
had been checked adjust to fit screen. I drilled all the holes very
carefully using this print out as a template. I then decided to use a 65#
stock sheet of light blue paper for the actual label. This time I noticed
the "Fit to.." and changed it to "Actual Size". There was a 1/4 inch
difference between the two (Actual Size being bigger.)

So much for that enclosure. This morning I've spent calling each and every
number on the TenTec Contact List to re order a charcoal TP-19 pen, but
every singlenumber has been busy. I tried to order firs by their web site,
but the checkout process returned an Error Message.

Is TenTec still alive out there?

Lee Mairs
KM4YY
Romney, WV 26757


TTF fun

flsaas
 

A couple of members of the CRES radio club in Central Ohio and I participated in TTF at Scioto Trail State Park in southern OH,
We rented a mini cabin and had hills all around us but using a KX3 we managed to rack up 5130 points!

We worked 2 HB9's as the best DX on 40m and 9 SOTA stations.

We missed getting the FLQSO party's certificate for all of the "F L O R I D A" 1x1's though, we could not find K4O or K4A 8-)

72
WA8PGE - Fred
operating with
K8AX - Dave
N8WL - Steve


PigRig Pen Problem

Lee Mairs (SAG) <lmairs@...>
 

I screwed up. I printed off my label but didn't notice that the printer box had been checked adjust to fit screen. I drilled all the holes very carefully using this print out as a template. I then decided to use a 65# stock sheet of light blue paper for the actual label. This time I noticed the "Fit to.." and changed it to "Actual Size". There was a 1/4 inch difference between the two (Actual Size being bigger.)

So much for that enclosure. This morning I've spent calling each and every number on the TenTec Contact List to re order a charcoal TP-19 pen, but every singlenumber has been busy. I tried to order firs by their web site, but the checkout process returned an Error Message.

Is TenTec still alive out there?

Lee Mairs
KM4YY
Romney, WV 26757


Re: Pig rig reminded me of building tip

Johnny AC0BQ
 

Gm Mike 
Excellent tip!
Tnx 
72
JOHNNY AC0BQ


On Monday, April 29, 2013, Michael McShan wrote:
 

Good morning all,

I hope everyone got to have some radio fun this weekend. I operated SOTA from Mount Scott in the Wichita Mountains and made 40 qsos. Good day for me. :-)

So, Pig Rig #181 is almost finished (I know, I'm slow). I was testing the receiver when connected to the antenna, and the rig receives well but the AGC seemed like it was not working (I was getting huge, sudden shifts in audio volume). I then remembered a debugging technique that told to me years ago (I think by David WN5Y) that came to the rescue and thought I'd pass it on if it helps anyone.

The trick is to hold the printed circuit board in front of a good light source (desk lamp, whatever) and look for places where the light shines through. Using that trick, I discovered that one end of D4 had never been soldered. When fixed, the receiver works as it should.

Respectfully submitted to my esteemed colleagues and oink oink,

Mike N5JKY
Oklahoma City


Re: Pig rig reminded me of building tip

WA0ITP
 

Fb MIke,

Congrats and Good Sleuthing.

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

----- Original Message -----
From: "Michael McShan" <n5jky@me.com>
To: <4sqrp@yahoogroups.com>
Sent: Monday, April 29, 2013 10:31 AM
Subject: [4sqrp] Pig rig reminded me of building tip


| Good morning all,
|
| I hope everyone got to have some radio fun this weekend. I operated SOTA from
Mount Scott in the Wichita Mountains and made 40 qsos. Good day for me. :-)
|
| So, Pig Rig #181 is almost finished (I know, I'm slow). I was testing the
receiver when connected to the antenna, and the rig receives well but the AGC
seemed like it was not working (I was getting huge, sudden shifts in audio
volume). I then remembered a debugging technique that told to me years ago (I
think by David WN5Y) that came to the rescue and thought I'd pass it on if it
helps anyone.
|
| The trick is to hold the printed circuit board in front of a good light source
(desk lamp, whatever) and look for places where the light shines through. Using
that trick, I discovered that one end of D4 had never been soldered. When
fixed, the receiver works as it should.
|
| Respectfully submitted to my esteemed colleagues and oink oink,
|
| Mike N5JKY
| Oklahoma City
|
| ------------------------------------
|
| 4SQRP Website: http://4sqrp.com
| OzarkCon is coming April 4-5, 2014 in Branson, MO
| View Details at http://www.ozarkcon.com/index.phpYahoo! Groups Links
|
|
|


Re: Pig rig reminded me of building tip

Stephen Roberts <steverob@...>
 

That happened to me the other day when I was troubleshooting a LiL Squall that I built a while ago and had to wait for another transistor to get it fired up. Well when I removed the old transistor the pad on the top of the board went with it, so i keep a high power led flashlight on hand and shine it through the opposite side of boards so I can see not only empty holes where components are supposed to be, but also the traces inside the board and where they go. Turned out the missing pad went straight to ground so a simple jumper to the nearest ground did the trick.

Oink back at ya

Steve
#3139
Rig #139




On Apr 29, 2013, at 11:31 AM, Michael McShan wrote:

 

Good morning all,

I hope everyone got to have some radio fun this weekend. I operated SOTA from Mount Scott in the Wichita Mountains and made 40 qsos. Good day for me. :-)

So, Pig Rig #181 is almost finished (I know, I'm slow). I was testing the receiver when connected to the antenna, and the rig receives well but the AGC seemed like it was not working (I was getting huge, sudden shifts in audio volume). I then remembered a debugging technique that told to me years ago (I think by David WN5Y) that came to the rescue and thought I'd pass it on if it helps anyone.

The trick is to hold the printed circuit board in front of a good light source (desk lamp, whatever) and look for places where the light shines through. Using that trick, I discovered that one end of D4 had never been soldered. When fixed, the receiver works as it should.

Respectfully submitted to my esteemed colleagues and oink oink,

Mike N5JKY
Oklahoma City