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Greetings Carl,
It would probably take over an hour to author a letter telling exactly ho=
w to do the silkscreen method of making PC boards. However, if there are=
enough in the group that would be interested in learning how, I could ta=
ke the time to write about it Many years ago, I did a demo for a Ham Radi=
o Club where I started with the tape-up layout and produced a finished et=
ched and cleaned ready-to-use 4" X 6" board in 16 minutes flat. =20
I am planning a website devoted to that task in the near furture--say by =
Fall. At that time, I am going to be offering all of the supplys necessa=
ry for the job. Interest shown by this group might be somewhat of a measu=
re of whether I should continue with my plans. =20
I will tell you that the ferric chloride method is something that you wil=
l throw rocks at when you learn about the etchant that I use. It has a c=
ouple of requirements that must be strictly adherred to and other than th=
at it is superior to any methods that I have come across:
It must be well ventilated!!!!!!!!!!!!!!!!!!!!!!!
It must not get too hot!!!!!!!!!!!!!!!!!!!!!!!!!!
The following solution requires NO heating, NO bubbling, No agitation!
1-part H2O2 (Hydrogen Peroxide)
1-part Muratic acid (Hydrochloric Acid)
8-parts H2O (water)
The boards are suspended in the solution and the reaction causes a thermo=
genic reaction and heats the solution. It must not get above 155 F or it=
will boil out of the etching tank--even if it is tall. Adding a cup of =
Amonium Hydroxide will raise the danger point to about 187 F which is eas=
ier to work with. =20
But if you get your hands in the solution a transdermal thing will happe=
n and eventually you will have Amonium =20
Chloride (from the Amonium Hydroxide reacted with Hydrochloric Acid) get=
into your urine and you'll flunk a U/A for methamphetamine.
In a fresh solution that used gallons as the measurements=3D10 gallons to=
tal, I could etch 24 4" X 6" single-sided, 2-OZ
boards in 3 minutes and 20 seconds.
To refresh the solution, add H202!
Billy Dean Ward
=20
----- Original Message -----
From: carl seyersdahl
Sent: Thursday, July 05, 2001 12:21 PM
To: Billy Ward; amps@contesting.com
Subject: Re: [AMPS] Making tubes
=20
I'm not exactly crazy about making my own tubes, but I do like to make a =
pc board now and then. Can you tell me where I can get info on the 'silks=
creen " method making pc boards. It would likely be a big improvement ove=
r what I've been doing with a magic marker and ferric chloride. thanks =20
carl / kz5ca
----- Original Message ----- =20
From: Billy Ward =20
To: amps@contesting.com =20
Sent: Thursday, July 05, 2001 2:06 PM
Subject: [AMPS] Making tubes
Greetings Group,
=20
I will ask this question at the chance of being made to look ignorant!
=20
With the high price of tubes, I wonder if anyone has ever invisioned a ho=
mebrew project to actually make the tube from scratch? I know that it wo=
uld be a little more than the average ham is used to working with but why=
could we not use something such as stainless steel tubing and come up wi=
th a decent power transmitting tube. After all, someone once did that!
=20
We all know approximately what is needed and some of the group, I am sure=
, may have worked for places such as Eimac etc. and have a lot of knowled=
ge of what goes into such a task. =20
=20
Sometimes things like this is MUCH more difficult than meets the eye and =
on the other hand, some things are dirt simple and just appear to be diff=
icult. Like making pc boards from scratch--some would not think of it an=
d others like me can turn one out from drawing to board in 30-45 minutes =
using the silk-screen method at the kitchen sink.
=20
Billy Dean Ward
Get more from the Web. FREE MSN Explorer download : http://explorer.msn.c=
omGet more from the Web. FREE MSN Explorer download : http://explorer.ms=
n.com
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<HTML><BODY BGCOLOR=3D"#ffffff" STYLE=3D"font:10pt verdana; border:none;b=
ackground-color:#ffffff; "><DIV>Greetings Carl,</DIV> <DIV> </DIV> <=
DIV>It would probably take over an hour to author a letter telling exactl=
y how to do the silkscreen method of making PC boards. However, if =
there are enough in the group that would be interested in learning how, I=
could take the time to write about it Many years ago, I did a demo for a=
Ham Radio Club where I started with the tape-up layout and produced a fi=
nished etched and cleaned ready-to-use 4" X 6" board in 16 minutes f=
lat. </DIV> <DIV> </DIV> <DIV>I am planning a website devoted t=
o that task in the near furture--say by Fall. At that time, I am go=
ing to be offering all of the supplys necessary for the job. Interest sho=
wn by this group might be somewhat of a measure of whether I should conti=
nue with my plans. </DIV> <DIV> </DIV> <DIV>I will tell you that the=
ferric chloride method is something that you will throw rocks at when yo=
u learn about the etchant that I use. It has a couple of =
requirements that must be strictly adherred to and other than that it is =
superior to any methods that I have come across:</DIV> <DIV> </DIV> =
<DIV>It must be well ventilated!!!!!!!!!!!!!!!!!!!!!!!</DIV> <DIV>It must=
not get too hot!!!!!!!!!!!!!!!!!!!!!!!!!!</DIV> <DIV> </DIV> <DIV>T=
he following solution requires NO heating, NO bubbling, No agitation!</DI=
V> <DIV> </DIV> <DIV>1-part H2O2 (Hydrogen Peroxide)</DIV> <DIV>1-pa=
rt Muratic acid (Hydrochloric Acid)</DIV> <DIV>8-parts H2O (water)</DIV> =
<DIV> </DIV> <DIV>The boards are suspended in the solution and the r=
eaction causes a thermogenic reaction and heats the solution. It mu=
st not get above 155 F or it will boil out of the etching tank--even if i=
t is tall. Adding a cup of Amonium Hydroxide will raise the danger =
point to about 187 F which is easier to work with. </DIV> <DIV> </DI=
V> <DIV>But if you get your hands in the solution a transdermal thi=
ng will happen and eventually you will have Amonium </DIV> <DIV>Chloride =
(from the Amonium Hydroxide reacted with Hydrochloric Acid) ge=
t into your urine and you'll flunk a U/A for methamphetamine.</DIV> <DIV>=
</DIV> <DIV>In a fresh solution that used gallons as the measuremen=
ts=3D10 gallons total, I could etch 24 4" X 6" single-sided, 2-OZ</DIV> <=
DIV>boards in 3 minutes and 20 seconds.</DIV> <DIV> </DIV> <DIV=
>To refresh the solution, add H202!</DIV> <DIV> </DIV> <DIV>Billy De=
an Ward</DIV> <DIV> </DIV> <BLOCKQUOTE style=3D"PADDING-RIGHT: 0px; =
PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARG=
IN-RIGHT: 0px"> <DIV style=3D"FONT: 10pt Arial">----- Original Message --=
---</DIV> <DIV style=3D"BACKGROUND: #e4e4e4; FONT: 10pt Arial; COLOR: bla=
ck"><B>From:</B> carl seyersdahl</DIV> <DIV style=3D"FONT: 10pt Arial"><B=
>Sent:</B> Thursday, July 05, 2001 12:21 PM</DIV> <DIV style=3D"FONT: 10p=
t Arial"><B>To:</B> Billy Ward; amps@contesting.com</DIV> <DIV style=3D"F=
ONT: 10pt Arial"><B>Subject:</B> Re: [AMPS] Making tubes</DIV> <DIV> =
;</DIV> <META content=3D"MSHTML 5.00.3314.2100" name=3DGENERATOR> <STYLE>=
</STYLE> <DIV><FONT face=3DArial>I'm not exactly crazy about making my o=
wn tubes, but I do like to make a pc board now and then. Can you tell me =
where I can get info on the 'silkscreen " method making pc boards. It wou=
ld likely be a big improvement over what I've been doing with a magic mar=
ker and ferric chloride. thanks </FONT></DIV> <DIV><FONT face=3DArial>&nb=
sp; carl / kz5ca</FONT></DIV> <BLOCKQUOTE style=3D"PADDING-RIGHT: 0px; PA=
DDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN=
-RIGHT: 0px"> <DIV style=3D"FONT: 10pt arial">----- Original Message ----=
- </DIV> <DIV style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color:=
black"><B>From:</B> <A title=3Dbillydeanward@hotmail.com href=3D"mailto:=
billydeanward@hotmail.com">Billy Ward</A> </DIV> <DIV style=3D"FONT: 10pt=
arial"><B>To:</B> <A title=3Damps@contesting.com href=3D"mailto:amps@con=
testing.com">amps@contesting.com</A> </DIV> <DIV style=3D"FONT: 10pt aria=
l"><B>Sent:</B> Thursday, July 05, 2001 2:06 PM</DIV> <DIV style=3D"FONT:=
10pt arial"><B>Subject:</B> [AMPS] Making tubes</DIV> <DIV><BR></DIV> <D=
IV><BR>Greetings Group,</DIV> <DIV> </DIV> <DIV>I will ask this ques=
tion at the chance of being made to look ignorant!</DIV> <DIV> </DIV=
> <DIV>With the high price of tubes, I wonder if anyone has ever invision=
ed a homebrew project to actually make the tube from scratch? I kno=
w that it would be a little more than the average ham is used to working =
with but why could we not use something such as stainless steel tubing an=
d come up with a decent power transmitting tube. After all, someone=
once did that!</DIV> <DIV> </DIV> <DIV>We all know approximately wh=
at is needed and some of the group, I am sure, may have worked for places=
such as Eimac etc. and have a lot of knowledge of what goes into such a =
task. </DIV> <DIV> </DIV> <DIV>Sometimes things like this is M=
UCH more difficult than meets the eye and on the other hand, some things =
are dirt simple and just appear to be difficult. Like making pc boa=
rds from scratch--some would not think of it and others like me can turn =
one out from drawing to board in 30-45 minutes using the silk-screen meth=
od at the kitchen sink.</DIV> <DIV> </DIV> <DIV>Billy Dean Ward</DIV=
><BR clear=3Dall> <HR> Get more from the Web. FREE MSN Explorer download =
: <A href=3D"http://explorer.msn.com/";>http://explorer.msn.com</A><BR> <P=
></P></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML><br clear=3Dall><hr>Get more=
from the Web. FREE MSN Explorer download : <a href=3D'http://explorer.m=
sn.com'>http://explorer.msn.com</a><br></p>
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