Adventures in homebrewing by NI5X

Links

ats3b.1st

Ats3B.1 as kitted by KD1JV but with my modifactions.  The attenuator mod is taken from OK1IF as posted on the yahoo user's group
for the radio.  http://groups.yahoo.com/group/AT_Sprint/ .  I changed the value to a 1K pot because I had one, but then I liked it better
anyway.  I had used a 500ohm pot on my original ats3b.  I also switched sides for mounting the band modules to the top side of the
board.  I won't be mounting in a standard Altoids tin, so this is more convenient for my purposes.
Here is a link to the KD1JV web page for the kit:  http://kd1jv.qrpradio.com/ATS3B/ats3b.HTM .

ats3b.1.b

ats3b.1 and filters

PSK setup with ATS3B.1 and Jornada 720

psk setup with jornada 720
 

My first version of the ATS3B combined with the ALT tuner
ats3bopen
With all of the jumpers on, the inductors are bypassed and
the variable capacitor is in play, removing it's jumper takes the cap out of circuit.

touch paddle
Touch paddle made from crystal holders.

lc meter 1

LC meter version 1

lc meter 2

LC meter version 2  Built from files here:  Surprisingly accurate lc meter


toll house box
Its just a box of cookies.



QRP Accessory box.  CW decoder, Frequency counter, Audio amp, so far.


ni5x frequency counter

Schematic as Jpeg for above Frequency Counter




Crystal tester and py2rlm frequency counter
Crystal tester built from Motorola crystal element for Maxtrac radio then hooked to a frequency counter built
from a circuit from IK3OIL and mounted in an Altoids style tin.




Manhattan Style construction is a time honored method of home brewing ham radio projects.  It is easy to follow along with a schematic and build your circuit in the same order, sometimes nearly duplicating the schematic on a piece of copper clad board.  The usual method is super-glueing pads of copper clad board, cut with a nibbler, shears or scissors, on to another piece of copper clad which also serves as the ground plane.

While trying to prototype a circuit with surface mount IC's I came up with a novel idea for the pads and it uses recycled material.  Hams are known for having lots of recyclable material we just call it our junk box.  

I use a hacksaw or jeweler's saw to cut the edge connectors off of computer cards and memory sticks.  Both ISA and PCI cards can be used and 72 pin simms are considered junk now, no matter what we paid for it originally.

The ISA card's pads line up with standard DIP IC's and PCI card pads line up with most surface mount IC's.  Individual pads can be cut from the ISA card edges with the jeweler's saw to make normal Manhattan Style pads.  The accompanying pictures should explain everything you need to know.

pads and saw

copper clad



NI5X Log file beginning 06/23/2007




a .-          k -.-          u ..-          3 ...--

b -...        l .-..          v ...-        4 ....-

c -.-.        m --          w .--         5 .....

d -..         n -.            x -..-        6 -....                              π

e .            o ---           y -.--       7 --...

f ..-.         p .--.           z --..         8 ---..

g --.         q --.-           0 -----       9 ----.                              Fiestaware  made with Depleted Uranium

h ....         r .-.            1 .----         stop .-.-.-                                 Audio file represents 3.5mr/h

i ..            s ...             2 ..---           comma --..--

j .---          t -               ? ..--..


Phonetic  Letter  Code 
Alpha (AL-fah) A  .- 
Bravo (BRAH-voh) B  -... 
Charlie (CHAR-lee) C  -.-. 
Delta (DELL-tah) D  -.. 
Echo (ECK-oh) E  . 
Foxtrot (FOKS-trot) F  ..-. 
Golf  (GOLF) G  --. 
Hotel (hoh-TELL)  H  .... 
India (IN-dee-ah) I  .. 
Juliet (JEW-lee-ETT) J  .--- 
Kilo  (KEY-loh) K  -.- 
Lima (LEE-mah) L  .-.. 
Mike  (MIKE) M  -- 
November (no-VEM-ber) N  -. 
Oscar (OSS-cah)  O  --- 
Papa (pah-PAH) P  .--. 
Quebec (keh-BECK) Q  --.- 
Romeo (ROW-me-oh) R  .-. 
Sierra (see-AIR-rah) S  ... 
Tango (TANG-GO) T  - 
Uniform (YOU-nee-form) U  ..- 
Victor (VIK-tah) V  ...- 
Whiskey (WISS-key) W  .-- 
X-ray (ECKS-ray) X  -..- 
Yankee (YANG-key) Y  -.-- 
Zulu (ZOO-loo) Z  --.. 
Character  Code 
1  .---- 
2  ..--- 
3  ...-- 
4  ....- 
5  ..... 
6  -.... 
7  --... 
8  ---.. 
9  ----. 
0  ----- 
Period (Break)  .-.-.- 
Comma  --..-- 
Question Mark  ..--.. 
Double Dash (BT)  -...- 
Fraction Bar  -..-. 
End of Message (AR)  .-.-. 
End of Contact (SK or VA)  ...-.- 
Commat  "@" sign (AC)  .--.- . (Adopted by ITU in 2004)

 

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