Re: microscope for electronics use
They sell those as coin microscopes. I use a LAN-based CCTV camera. I can
place it far enough from the pcb (the software has a nice zoom function) to
be able to do SMT soldering with it...
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On Tue, Jul 16, 2019 at 6:18 AM John AE5X <ae5x@...> wrote: Here's my $20 recommendation and some sample photos made with it:
John AE5X
--
Paul Mateer, AA9GG
Elan Engineering Corp.
www.elanengr.com
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Re: microscope for electronics use
Here's my $20 recommendation and some sample photos made with it:
John AE5X
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Re: 25 years of the SIERRA - Mainboard, Band Module and critical parts are available
By the way, Sierra means mountain range in spanish... 73, 72 de Juanjo, EC5ACA. EA-QRP #104, G-QRP #9742, QRP-L #1662, FP #899. Juanjo Pastor C/San Roque, 4-1? 46460 Silla SPAIN e-mail: ec5aca@... web: web del club: Tel.: +034 96 120 17 67 M¨®vil: 651 35 35 11 -----Mensaje original----- De: [email protected] [mailto: [email protected]] En nombre de Bob Macklin Enviado el: lunes, 15 de julio de 2019 4:49 Para: [email protected]Asunto: Re: [qrp-tech] 25 years of the SIERRA - Mainboard, Band Module and critical parts are available How many sets of the Sierra components are available? How do I buy a set? Can I use PayPal? Bob Macklin Seattle, Wa
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Re: 25 years of the SIERRA - Mainboard, Band Module and critical parts are available
How many sets of the Sierra components are available?
How do I buy a set? Can I use PayPal?
Bob Macklin
Seattle, Wa
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Re: SMD Soldering is Easy...
Besides agreeing with others on technique, I use bamboo skewers (for cooking) to hold the parts down, move them around.
72 - Ron - AG1P
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-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of na5n_qrp Sent: Sunday, July 14, 2019 12:57 PM To: [email protected]Subject: Re: [qrp-tech] SMD Soldering is Easy... w8diz writes: I use my left index finger to hold down the part...1206 size or larger
Tack solder the part on one side/corner...
Remove smoked finger and then solder remaining connections. Pretty much how I do it, Diz. On an 8-pin chip (NE602 SOIC-8) for example, I sweat a little solder on say pin 8 on the PCB, then just slide the IC onto the pads (with fingers, tweezers, hemostat, etc. as you prefer), align it with the pads, then heat pin 8 again to solder the IC in place. Tweak alignment if needed. Then solder pin 4 to ensure good alignment, pins centered to the pads. The IC is now secure on the board to solder the remaining pins hands-free. I sometimes use the end of a wood shaft Q-tip or small screw driver to hold down the IC or discrete component to ensure it is flush against the PCB when soldering. It takes very little solder for those SMC pins to make a good connection to the PCB. As soon as solder melts, remove tip to avoid excessive heating. A big solder blob not recommended. Periodically, clean the soldering with a hobby brush and alcohol. Inspect for solder bridges or flux gunk between pins with magnifying glass. Touch up any really ugly soldering (you'll have a couple). I do use tweezers on 0603 sizes, though. Just not that hard. The KISS approach works well here. 72, Paul NA5N
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microscope for electronics use
Mark,
What is the brand and model number of your microscope?
One of these days I am going to get one.
Al, N8WQ
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On Sun, 14 Jul 2019 11:50:06 -0400, Mark Schoonover <mark@...> wrote: If I may, I have a monthly live-stream building projects. Vast majority of
them are SMD. Here's the N2PK VNA:
Here's QRPGuys Digital Field Strength Meter:
The stream is on the rough side, still figure stuff how to do one. :)
73! Mark KA6WKE
Website:
Live Stream:
Facebook:
Twitter:
EMail Announcement: [email protected]
Author: 4NEC2 The Definitive Guide
EMail List:: [email protected]
On Sun, Jul 14, 2019, 08:37 Doug Hendricks <ki6ds1@...> wrote:
How about 0603 parts? I use the tweezer technique but the problem is
seeing. I recently got a $22 digital microscope from eBay and it works
great.
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Re: SMD Soldering is Easy...
Michael Babineau writes: re-heat the tinned pad and then lightly holding both sides of the
part with tweezers "snowplow it" towards the tinned pad. When it
comes in contact with the melted solder there is a wicking effect that almost always pulls the part into its proper place. Try it out. Michael, Exactly what I was trying to explain in my post, but your explanation more effective than mine! :-( 72, Paul NA5N
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Re: SMD Soldering is Easy...
w8diz writes: I use my left index finger to hold down the part...1206 size or larger
Tack solder the part on one side/corner...
Remove smoked finger and then solder remaining connections. Pretty much how I do it, Diz. On an 8-pin chip (NE602 SOIC-8) for example, I sweat a little solder on say pin 8 on the PCB, then just slide the IC onto the pads (with fingers, tweezers, hemostat, etc. as you prefer), align it with the pads, then heat pin 8 again to solder the IC in place. Tweak alignment if needed. Then solder pin 4 to ensure good alignment, pins centered to the pads. The IC is now secure on the board to solder the remaining pins hands-free. I sometimes use the end of a wood shaft Q-tip or small screw driver to hold down the IC or discrete component to ensure it is flush against the PCB when soldering. It takes very little solder for those SMC pins to make a good connection to the PCB. As soon as solder melts, remove tip to avoid excessive heating. A big solder blob not recommended. Periodically, clean the soldering with a hobby brush and alcohol. Inspect for solder bridges or flux gunk between pins with magnifying glass. Touch up any really ugly soldering (you'll have a couple). I do use tweezers on 0603 sizes, though. Just not that hard. The KISS approach works well here. 72, Paul NA5N
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Re: SMD Soldering is Easy...
One thing to be careful with using solder paste is it tends to create very small solder balls that you can't see without a microscope. Even a good cleaning in alcohol and toothbrush won't remove them. What I do now is put solder the pads followed by a liberal amount of Amtech flux, place the part then hit it with hot air. Using a soldering iron put solder on one pad flux it solder that pad. After that solder the remaining leads one at a time or drag solder. 73! Mark KA6WKE Website: Live Stream: On Sun, Jul 14, 2019, 09:16 Jack via Groups.Io <jjpurdum@...> wrote: I've done that and it does work well. However, if you're really going to
work with SMD parts, nothing beats solder paste and a hot air gun. I use a
dental pick to put the paste on, drop the SMD in place and use my tweezers
to get it in place, hold it there, and then hit it with the air gun. It's
magic how the paste wicks onto the SMD legs and I almost never have to
remove any bridges.
Jack, W8TEE
On Sunday, July 14, 2019, 12:09:54 PM EDT, Michael Babineau <
mbabineau.ve3wmb@...> wrote:
A few months back our local club had a speaker who talked about SMD
soldering and he had some excellent suggestions
(he is a retired EE who did PCB design for a telecom's company). The most
useful trick, was to use the normal
"tin one pad" trick, but his suggestion for getting the part in place is
excellent. You place the part such that one end is
close to the tinned pad, re-heat the tinned pad and then lightly holding
both sides of the part with tweezers "snowplow it" towards
the tinned pad. When it comes in contact with the melted solder there is a
wicking effect that almost always pulls the
part into its proper place. Try it out.
--
Michael VE3WMB / VA2NB
|
Re: SMD Soldering is Easy...
I've done that and it does work well. However, if you're really going to work with SMD parts, nothing beats solder paste and a hot air gun. I use a dental pick to put the paste on, drop the SMD in place and use my tweezers to get it in place, hold it there, and then hit it with the air gun. It's magic how the paste wicks onto the SMD legs and I almost never have to remove any bridges.
Jack, W8TEE
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On Sunday, July 14, 2019, 12:09:54 PM EDT, Michael Babineau <mbabineau.ve3wmb@...> wrote:
A few months back our local club had a speaker who talked about SMD soldering and he had some excellent suggestions
(he is a retired EE who did PCB design for a telecom's company).? The most useful trick, was to use the normal
"tin one pad" trick, but his suggestion for getting the part in place is excellent. You place the part such that one end is
close to the tinned pad, re-heat the tinned pad and then lightly holding both sides of? the part with tweezers? "snowplow it" towards
the tinned pad. When it comes in contact with the melted solder there is a wicking effect that almost always pulls the
part into its proper place.? Try it out.
--
Michael VE3WMB / VA2NB
|
Re: SMD Soldering is Easy...
Hi Joe,
Is that the same hole where the socks go when they are missing from the laundry?
73,
Bill KU8H
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On 7/14/19 11:11 AM, Joseph Trombino, Jr wrote: I agree that SMD parts are easier to solder than through-hole parts but the main problem I have is finding the SMD parts and getting them on the board!! (grin).
And don¡¯t ever drop an SMD part¡it falls into that deep, dark hole of nothingness!!
73, Joe W2KJ
I QRP, therefore I am
--
bark less - wag more
|
Re: SMD Soldering is Easy...
A few months back our local club had a speaker who talked about SMD soldering and he had some excellent suggestions
(he is a retired EE who did PCB design for a telecom's company). The most useful trick, was to use the normal
"tin one pad" trick, but his suggestion for getting the part in place is excellent. You place the part such that one end is
close to the tinned pad, re-heat the tinned pad and then lightly holding both sides of the part with tweezers "snowplow it" towards
the tinned pad. When it comes in contact with the melted solder there is a wicking effect that almost always pulls the
part into its proper place. Try it out.
--
Michael VE3WMB / VA2NB
|
Re: SMD Soldering is Easy...
If I may, I have a monthly live-stream building projects. Vast majority of them are SMD. Here's the N2PK VNA: Here's QRPGuys Digital Field Strength Meter: The stream is on the rough side, still figure stuff how to do one. :) 73! Mark KA6WKE Website: Live Stream: Facebook: Twitter: EMail Announcement: [email protected]Author: 4NEC2 The Definitive Guide EMail List:: [email protected]
On Sun, Jul 14, 2019, 08:37 Doug Hendricks <ki6ds1@...> wrote: How about 0603 parts? I use the tweezer technique but the problem is
seeing. I recently got a $22 digital microscope from eBay and it works
great.
|
Re: SMD Soldering is Easy...
Try using one of these:
Bob Macklin
K5MYJ
Seattle, Wa.
"Real Radios Glow In The Dark"
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----- Original Message ----- From: "w8diz" <w8diz@...> To: < [email protected]> Sent: Sunday, July 14, 2019 8:32 AM Subject: Re: [qrp-tech] SMD Soldering is Easy... Just for the record, I do not use tape or tweezers or any other tool for
that mater.
I use my left index finger to hold down the part...1206 size or larger
Tack solder the part on one side/corner...
Remove smoked finger and then solder remaining connections.
Works great...no tools required.
-Diz
On 7/14/19 11:22 AM, Jack via Groups.Io wrote:
Agreed. Also, if you use the Tweezer Approach to hold an SMD, know that
they can become hypersonic Tiddlywinks and end up in Near-Earth orbit,
also never to be seen again.
Jack, W8TEE
On Sunday, July 14, 2019, 11:11:19 AM EDT, Joseph Trombino, Jr
<w2kj@...> wrote:
I agree that SMD parts are easier to solder than through-hole parts but
the main problem I have is finding the SMD parts and getting them on the
board!! (grin).
And don¡¯t ever drop an SMD part¡it falls into that deep, dark hole of
nothingness!!
73, Joe W2KJ
I QRP, therefore I am
On Jul 14, 2019, at 9:56 AM, wb6ogd <garywinblad@...> wrote:
SMD is easy. So much better than through hole.
I put solder on one pad. Drop the part, push it around with an exacto
knife.
Hold down with a finger or (finger nail for small 0805 parts). Solder
the one
pad, then the rest. Solder braid if you get bridging.
73,
Gary
WB6OGD
On 7/14/2019 6:38 AM, Shirley Dulcey KE1L wrote:
Looks like a useful technique for SOIC parts, as shown in the picture.
There are many kits that use a few SMD ICs of that size along with
mostly through-hole components. The Softrock series is a good example.
I'm guessing that the picture comes from one of Diz's own kits.
Not as big a help for smaller form factors like TSSOP. They're so
small that they'd be hard to tape down, and the big problem you have
with those is solder bridges between the closely spaced leads. I've
never had much success dealing with TSSOP with a soldering iron and
wire solder; I'll always get out the heat gun and solder paste for
those. I know that some people have made it work by putting down a
bunch of solder and then using solder wick to remove most of it but I
haven't gotten that technique to work.
On Sun, Jul 14, 2019 at 8:08 AM w8diz <w8diz@...> wrote:
|
Re: SMD Soldering is Easy...
How about 0603 parts? I use the tweezer technique but the problem is seeing. I recently got a $22 digital microscope from eBay and it works great.
|
Re: 25 years of the SIERRA - Mainboard, Band Module and critical parts are available
Folks,
Thanks for the research work on the XTAL sources. I am not sure how many have seen the prices for the boards offered by Dirk, et al, but I received a response (below) from Dirk, DH4YM, that may be of interest. The total for all offered would be on the order of US$108.40 including the approximate DHL shipping. You are advised to contact him with your requirements.
And, by the way, the suggestion of using Google Translate above by Graham works splendidly!
| Dear William,
|
| thank you for your e-mail. Please find attached following available sierra parts and price list:
|
| - Mainboard: 17,50 Euro
| - Band module: each 5 Euro
| - Tuning capacitor 1:8 ratio: 35 Euro
| - 50 pin connector: 7,85 Euro
| - KC2 Module with programmed ?C: 15 Euro
|
| Shipping costs with DHL tracking option 15,89 Euro. PayPal and normal banking is fine.
|
| Please send me a short notice about your interest and we can clarify shipping details and payment.
|
| 73 Dirk, DH4YM
-
William, K6WHP
"Cheer up, things could get worse..so I cheered up and, sure enough, things got worse!"
|
Re: SMD Soldering is Easy...
Just for the record, I do not use tape or tweezers or any other tool for that mater.
I use my left index finger to hold down the part...1206 size or larger
Tack solder the part on one side/corner...
Remove smoked finger and then solder remaining connections.
Works great...no tools required.
-Diz
toggle quoted message
Show quoted text
On 7/14/19 11:22 AM, Jack via Groups.Io wrote: Agreed. Also, if you use the Tweezer Approach to hold an SMD, know that they can become hypersonic Tiddlywinks and end up in Near-Earth orbit, also never to be seen again.
Jack, W8TEE
On Sunday, July 14, 2019, 11:11:19 AM EDT, Joseph Trombino, Jr <w2kj@...> wrote:
I agree that SMD parts are easier to solder than through-hole parts but the main problem I have is finding the SMD parts and getting them on the board!! (grin).
And don¡¯t ever drop an SMD part¡it falls into that deep, dark hole of nothingness!!
??? ??? ??? 73, Joe W2KJ
??? ??? ??? I QRP, therefore I am
On Jul 14, 2019, at 9:56 AM, wb6ogd <garywinblad@...> wrote:
SMD is easy.? So much better than through hole.
I put solder on one pad.? Drop the part, push it around with an exacto knife.
Hold down with a finger or (finger nail for small 0805 parts). Solder the one
pad, then the rest.? Solder braid if you get bridging.
73,
Gary
WB6OGD
On 7/14/2019 6:38 AM, Shirley Dulcey KE1L wrote:
Looks like a useful technique for SOIC parts, as shown in the picture.
There are many kits that use a few SMD ICs of that size along with
mostly through-hole components. The Softrock series is a good example.
I'm guessing that the picture comes from one of Diz's own kits.
Not as big a help for smaller form factors like TSSOP. They're so
small that they'd be hard to tape down, and the big problem you have
with those is solder bridges between the closely spaced leads. I've
never had much success dealing with TSSOP with a soldering iron and
wire solder; I'll always get out the heat gun and solder paste for
those. I know that some people have made it work by putting down a
bunch of solder and then using solder wick to remove most of it but I
haven't gotten that technique to work.
On Sun, Jul 14, 2019 at 8:08 AM w8diz <w8diz@...> wrote:
|
Re: SMD Soldering is Easy...
Agreed. Also, if you use the Tweezer Approach to hold an SMD, know that they can become hypersonic Tiddlywinks and end up in Near-Earth orbit, also never to be seen again.
Jack, W8TEE
toggle quoted message
Show quoted text
On Sunday, July 14, 2019, 11:11:19 AM EDT, Joseph Trombino, Jr <w2kj@...> wrote: I agree that SMD parts are easier to solder than through-hole parts but the main problem I have is finding the SMD parts and getting them on the board!! (grin). And don¡¯t ever drop an SMD part¡it falls into that deep, dark hole of nothingness!! ??? ??? ??? 73, Joe W2KJ ??? ??? ??? I QRP, therefore I am On Jul 14, 2019, at 9:56 AM, wb6ogd <garywinblad@...> wrote:
SMD is easy.? So much better than through hole.
I put solder on one pad.? Drop the part, push it around with an exacto knife.
Hold down with a finger or (finger nail for small 0805 parts). Solder the one
pad, then the rest.? Solder braid if you get bridging.
73,
Gary
WB6OGD
On 7/14/2019 6:38 AM, Shirley Dulcey KE1L wrote:
Looks like a useful technique for SOIC parts, as shown in the picture.
There are many kits that use a few SMD ICs of that size along with
mostly through-hole components. The Softrock series is a good example.
I'm guessing that the picture comes from one of Diz's own kits.
Not as big a help for smaller form factors like TSSOP. They're so
small that they'd be hard to tape down, and the big problem you have
with those is solder bridges between the closely spaced leads. I've
never had much success dealing with TSSOP with a soldering iron and
wire solder; I'll always get out the heat gun and solder paste for
those. I know that some people have made it work by putting down a
bunch of solder and then using solder wick to remove most of it but I
haven't gotten that technique to work.
On Sun, Jul 14, 2019 at 8:08 AM w8diz <w8diz@...> wrote:
|
Re: 2N2-40+ QRP-Transceiver, troubleshooting
On 7/10/2019 12:06 PM, dl2ki@... wrote: Hi,
today i have now exchanged all capacitors in the VFO and experimented with other transistors as well. The output signal of the VFO is not significantly stronger. No changes were made to the circuit itself at first.
Since I am not here for 2 weeks now, I will completely disassemble and reassemble the VFO afterwards. This seems more useful to me than soldering the VFO in the tight space available in the circuit.
Then I have to see how it goes on.
73, Wolfgang
DL2KI Wolfgang, I keep being bothered by the fact that most, if not all, of the waveforms you show in your photos look correct, but just not the right amplitude.? Is it possible that your scope probe is faulty or that your scope is not calibrated? Hope you are enjoying your time away from the bench. 72/73, Jim, K8IQY
|
Re: SMD Soldering is Easy...
I agree that SMD parts are easier to solder than through-hole parts but the main problem I have is finding the SMD parts and getting them on the board!! (grin).
And don¡¯t ever drop an SMD part¡it falls into that deep, dark hole of nothingness!!
73, Joe W2KJ
I QRP, therefore I am
toggle quoted message
Show quoted text
On Jul 14, 2019, at 9:56 AM, wb6ogd <garywinblad@...> wrote:
SMD is easy. So much better than through hole.
I put solder on one pad. Drop the part, push it around with an exacto knife.
Hold down with a finger or (finger nail for small 0805 parts). Solder the one
pad, then the rest. Solder braid if you get bridging.
73,
Gary
WB6OGD
On 7/14/2019 6:38 AM, Shirley Dulcey KE1L wrote:
Looks like a useful technique for SOIC parts, as shown in the picture.
There are many kits that use a few SMD ICs of that size along with
mostly through-hole components. The Softrock series is a good example.
I'm guessing that the picture comes from one of Diz's own kits.
Not as big a help for smaller form factors like TSSOP. They're so
small that they'd be hard to tape down, and the big problem you have
with those is solder bridges between the closely spaced leads. I've
never had much success dealing with TSSOP with a soldering iron and
wire solder; I'll always get out the heat gun and solder paste for
those. I know that some people have made it work by putting down a
bunch of solder and then using solder wick to remove most of it but I
haven't gotten that technique to work.
On Sun, Jul 14, 2019 at 8:08 AM w8diz <w8diz@...> wrote:
|
AA9GG
Alan N8WQ
Jack
Jim Kortge, K8IQY