Re: Encyclopedia of Electronics Vols 1-6
Better link - all in top two rows of results?
--
Terry VK5TM
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Re: Manhattan Noise Generator
I was just on the QRP Guys website reading the assembly manual and operating manual for your noise bridge and then found your "Manhattan Noise Bridge" in my email. Thanks Chuck !?? What contact cement do you recommend for the Manhattan pads? Jim WB4ILP?
On Fri, Apr 4, 2025, 4:45 PM chuck adams via <chuck.adams.phd= [email protected]> wrote: 1.? Screenshot...? New Manhattan layout diagram for an AA7FO Noise
Generator /w values
2.? 1698.jpg?????? How I mount a transistor with 3 legs on pads.
Compact.? IMHO.
3.? 0614.jpg?????? Note diode and resistor lower right have leads
soldered to ground plane.
4.? 0617.jpg?????? This is what I do when I have multiple leads going to
a pad.? I wait
??????????????????? until I have all leads in place and then solder.?
Saves expensive solder.
On the layout diagram.? The dark circles are pads with leads soldered to
them.
The leads with multiple circles drawn represent the lead is soldered to
the ground plane.
The resistors are mounted in vertical position.? And
1037.jpg
shows what parts mounted end up look like, even though this is with a
Muppet board that
K7QO used to make for me.
I have not shown in the layout the specific details on attaching the 9V
battery.? I
used the snap on critter that I got in quantity from ebay.? For the
output I solder
the ground lug to the ground plane and it serves to give a good solid
support to
the BNC connector.? Think outside the box for your own.
FYI.? Just wanted to clarify for the new Manhattan builders for now and
in the
future.? Download the photos so you don't have to go looking for them.
I hope 1037.jpg looks OK.? It did with one viewer, but enlarged for view
with
thunderbird for some reason.
--
chuck adams, aa7fo
WAS-17 QRP --> TX,FL,SC,GA
|
A paper cutter is your friend. They can be had fairly cheaply and are surprisingly useful. I print on 8.5x11 sheets of cardstock. Cut into four they are "Invitation" size, mail just fine as a postcard or in an "Invitation" envelope. They need to be a little less tall if you want them to go into a more standard size envelope.
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Manhattan Noise Generator
1.? Screenshot...? New Manhattan layout diagram for an AA7FO Noise Generator /w values
2.? 1698.jpg?????? How I mount a transistor with 3 legs on pads. Compact.? IMHO.
3.? 0614.jpg?????? Note diode and resistor lower right have leads soldered to ground plane.
4.? 0617.jpg?????? This is what I do when I have multiple leads going to a pad.? I wait
?????????????????? until I have all leads in place and then solder.? Saves expensive solder.
On the layout diagram.? The dark circles are pads with leads soldered to them.
The leads with multiple circles drawn represent the lead is soldered to the ground plane.
The resistors are mounted in vertical position.? And
1037.jpg
shows what parts mounted end up look like, even though this is with a Muppet board that
K7QO used to make for me.
I have not shown in the layout the specific details on attaching the 9V battery.? I
used the snap on critter that I got in quantity from ebay.? For the output I solder
the ground lug to the ground plane and it serves to give a good solid support to
the BNC connector.? Think outside the box for your own.
FYI.? Just wanted to clarify for the new Manhattan builders for now and in the
future.? Download the photos so you don't have to go looking for them.
I hope 1037.jpg looks OK.? It did with one viewer, but enlarged for view with
thunderbird for some reason.
--
chuck adams, aa7fo
WAS-17 QRP --> TX,FL,SC,GA
|
Re: Encyclopedia of Electronics Vols 1-6
<> and there are other
books/papers mixed in, but you get the jist.
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On 4/4/25 12:34, Bob Liesen via groups.io wrote: Chuck,
? I'll be darned if I can find these on the site.? Do you have a more detailed link?
Bob? WB0POQ
On Thu, Apr 3, 2025 at 9:39?AM chuck adams via groups.io <> <chuck.adams.phd@...> wrote:
Gang,
Probably, most of you know about the Graf series of
books titled "Encyclopedia of Electronics" with volumes
1 through 6.? Just about anything you are looking for
may be in there.? Crystal oscillators to sirens.
Amplifiers of all types and the list goes on.
All six volumes are on archive.org <> and are
downloadable.
If you are looking for something to do, then you should
consider spending the next three or four months reading
these in your spare time.? You wont have any spare time
when you start.? Been there.? Done that.
Or read them in place on the web.
FYI
chuck, aa7fo
--
chuck adams, aa7fo
WAS-17 QRP --> TX,FL,SC,GA
|
Getting postcard size card-stock seemed difficult - I'm sure it's out there somewhere.? I just print the cards
on 4x6 glossy paper.? Card was created in Inkscape.
?
Jerry W
KI4IO
?
?
?
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To echo others, a little ingenuity and some artwork from the internet goes a long way. Avery or other sources provide postcard-sized 4x4 paper sheets. Also, skillful use of the Avery 5160 labels allow you to put specific QSO details and affix them to the art side or the mailing side.
?
Trust me, Chuck, doing these can be almost as fun as doing a Manhattan or kit build.
?
..almost,
?
?
--
William, k6whp
--------------------
"Cheer up, things could get worse. So I cheered up and things got worse."
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Re: Encyclopedia of Electronics Vols 1-6
Chuck, ? I'll be darned if I can find these on the site.? Do you have a more detailed link? Bob? WB0POQ
On Thu, Apr 3, 2025 at 9:39?AM chuck adams via <chuck.adams.phd= [email protected]> wrote: Gang,
Probably, most of you know about the Graf series of
books titled "Encyclopedia of Electronics" with volumes
1 through 6.? Just about anything you are looking for
may be in there.? Crystal oscillators to sirens.
Amplifiers of all types and the list goes on.
All six volumes are on and are downloadable.
If you are looking for something to do, then you should
consider spending the next three or four months reading
these in your spare time.? You wont have any spare time
when you start.? Been there.? Done that.
Or read them in place on the web.
FYI
chuck, aa7fo
|
Re: Manhattan Noise Bridge
Just to add a little more noise to the conversation (see what I did there?) I built something like that based on an old design by N0SS.??
https://web.archive.org/web/20050331110118/http://www.n0ss.net:80/noise_source.pdf
?
?
?
?
It was my first attempt at toner transfer etching and it came out good enough to work.? If anybody cares you can read my write up at /g/HBTE/topic/28926106#msg323In case it isn't obvious to every single person reading this, I barely know what I am doing and I am trying to figuring it out as I go.? Listen to Chuck, not me.
?
my meager attempt...??
?
?
?
?
--
¡ì97.313?? Transmitter power standards.
(a) An amateur station must use the minimum transmitter power necessary to carry out the desired communications.
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Re: When PCB's are too expensive, and you're out of copper boards.
On Fri, Apr 4, 2025 at 10:55 AM, k6whp wrote:
David,?
?
How do you cut your smaller boards? Shear??
?
William -?
?
I score them on both sides with a fresh, sharp box cutter blade (Stanley, Exacto - that type of thing) and a steel rule. Do it very carefully, as if the ruler and blade slip, you'll end up with a nasty slice in your finger. Nice, deep scores. Then I use regular size pliers (not needle-nose) to gently bend it back and forth until it snaps off. Then I file the edge to smooth it up. Works a treat. I got the idea for making enclosures from PCB material from Ken WA4MNT many moons ago. Not sure where I got the technique for cutting the board from - maybe from Ken, maybe from some other source. It's been a while and my memory isn't the best, though I try to give credit where appropriate.
?
Dave
AA7EE?
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In the post earlier today about tariffs there was mentioned the pricing of solder.
?
I have had good luck with picking up mostly full rolls of solder at garage sales or when the shop at work has to dispose of it because it "expires".
I am sure many of you are familiar with similar industrial practices that adhere to strict shelf life requirements.
?
I have used and or tested many of these rolls of solder, and they often work just fine.
?
So the question is: Does it really expire, or more precisely, go bad?
?
And yes, I am certainly familiar with the rosin vs acid core varieties and the leaded vs lead free. I do pay attention to that fact when picking up said items at garage sales.
Sometimes I do want the acid core solder?because I use it in the garage for different things.
?
-Albert
KI4ORI
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Re: VHF QRP project/building
Please pardon the delay in getting back to this post. It has been a busy week or so.
?
I first wanted to say thanks for the ideas.
?
In particular, Barb, that VHF module looks very promising for the task. I will have to look into that a little further.
I wonder if there is anything else out there that is similar and covers VHF-low.
?
I do want to operate these two chassis on FM, but I may decide to also build an HF insert.
As some of you probably know, the BC-611opperated within our 80m band and is often crystaled for 3885kHz and operates AM.
It may be fun to build a chassis to duplicate the original operation.
?
Again, thanks to everyone for the input.
?
-Albert
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On Fri, Apr 4, 2025 at 08:16 AM, chuck adams wrote:
Worked a critter yesterday and he said he was sending a QSL card to confirm QSO.
Went looking for online source/printer and not having any luck since we lost
W4MPY.? Any ideas?
tnx
--
chuck adams, aa7fo
I like homemade cards. I think they fit in well with the QRP/homebrew ethos. I lay them out in Photoshop, though I'm sure there are other free programs available for simple designs. Before home computing was widespread, I used to use Letraset, and cut and paste simple graphics onto a piece of card, then photocopy the actual cards themselves at the local copy shop. Remember the QSL cards we used to get from the Soviet-bloc countries during the cold war? Very imperfect, very obviously homemade, and all of them unique and interesting. Same thing with many of the QSL cards from Western countries in the 30's and 40's. The cards I make are one-sided, leaving room for a longer handwritten message on the back, if I want. If I was using a particularly simple transmitter for the QSO, I'll even draw the schematic on the back. It helps to make every card unique and memorable. All in the true spirit of amateur radio!
?
Dave
AA7EE
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Re: When PCB's are too expensive, and you're out of copper boards.
David,?
?
How do you cut your smaller boards? Shear??
--
William, k6whp
--------------------
"Cheer up, things could get worse. So I cheered up and things got worse."
|
Re: When PCB's are too expensive, and you're out of copper boards.
On Fri, Apr 4, 2025 at 10:37 AM, chuck adams wrote:
<>? in the USA
Another vote for eBay seller abcfab, though I note his prices have gone up significantly since my last order with him a few years ago. I guess the prices of many things have been going up over the last few years :-(?
?
One thing I like about his board in particular, is that his cuts are accurate and the right angles exactly 90¡ã. That might not matter for rough prototypes, but when you want your projects to look good, and even more so if you're building enclosures with PCB material, it helps a lot.
?
Dave
AA7EE
|
Re: The end of inexpensive printed circuit boards and parts
On Fri, Apr 4, 2025 at 09:49 AM, Michael Maiorana wrote:
Looks like even more reason to go "Manhattan" style with Chuck!
I was about to say that this is another reason to adopt Manhattan construction, but Mike beat me to it.
?
I have put in several orders with Mouser (my main trusted component source) in the last month. They have been adding an extra fee to many of the items, and marking it as "tariff". For most items it was 10% but in once case (bulk crystals), it was 20%. I understand that DigiKey have been doing the same. Perhaps these fees are about to get higher? Not sure how all of this is going to pan out, but perhaps we'll all become better parts scroungers and learn how to be more creative with the resources we already have. I just mailed a check to Dan's Small Parts and Kits for a few bits and pieces. His prices are still the same :-)
?
This reminds me. I need to put in an order with Mike for some FT37-43's. The 2N2/20 I'm scratch-building is going to use much of my existing small stock. Seems as if I'm never far away from needing to put in another order with someone. And then, of course, when you're ordering something there's always a few more items that need to be added, "to save on shipping" :-)
?
Dave
AA7EE
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Re: When PCB's are too expensive, and you're out of copper boards.
Great idea! Bot those baked beans from Turkey might be a bit expensive.?
;-)
?
Newt
N4EWT
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Re: When PCB's are too expensive, and you're out of copper boards.
Never:
<>? in the USA
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On 4/4/25 10:31, Ryan Flowers via groups.io wrote:
--
Ryan Flowers - W7RLF
<>
W7RLF Prototyping Boards <>
MiscDotGeek YouTube Channel <>
--
chuck adams, aa7fo
WAS-17 QRP --> TX,FL,SC,GA
|
Re: Manhattan Noise Bridge
OK.? R2, R4, R6??? 22K 1/4W resistors
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BOM:
R1,R3,R5? 1.2K? 1/4W resistors? (not too critical)
R7??????? 680ohms? 1/4W resistor?? (drives the final stage harder)
C1,C2,C3,C4? 10nF mono or disc caps? (.01uF if you prefer labeled 104)
D1??????? 6.8V?? 1/2W zener diode
Q1,Q2,Q3? 2N2222, 2N3904 or 2N4401 NPN transistors? (just about anything)
--
chuck adams, aa7fo
WAS-17 QRP --> TX,FL,SC,GA
|
When PCB's are too expensive, and you're out of copper boards.
|
Todd W2TEF
k6whp
Newt N4EWT