Re: [cascadeqrp] W7ZOI 20dB, 20 watt attenuator
- Now THAT is creative - you made your own mill for milling PC boards. I love postings like this. I'd never heard of a XY vice before and now I know that I need one!
Very tidy work you do. I fear my hand skills stink, so when I make things, they might work, but ugly takes on a completely different meaning.
--- On Mon, 1/31/11, Phil <492commish@...> wrote:
> From: Phil <492commish@...>
> Subject: [cascadeqrp] W7ZOI 20dB, 20 watt attenuator
> To: firstname.lastname@example.org
> Date: Monday, January 31, 2011, 9:31 PM
> In the "Files" section of our
> YahooGroups site, I've created a folder for a little
> experiment I did. I needed an attenuator that could
> handle QRP power; I will be using it on my oscilloscope and
> other test gear.
> After a bit of research, I found what I was looking for in
> a 1998 QST. Lo and behold, it was associated with an
> article by Wes Hayward, W7ZOI (a member of this
> So, in the spirit of W7ZOI, I decided to try a new method
> for making a PCB. I did my own version of Wes'
> schematic and also did an illustration in Power Point of how
> a PCB would be laid out. That's what the .pdf document
> I loaded a board into an X-Y vise as level as I could,
> dropped down a Dremel bit that chucked in my drill press,
> and proceeded to "cut" some voids in the board. This
> was especially tricky because I used a fairly thin
> board. But it worked and the circuit does what I want
> it to do. You can see my ugly work in the photo.
> Later, I'll add a photo of the board mounted in a chassis
> box, likely with a bypass switch.
> It sure is great to be on vacation with time to do this
> Phil Westover, WA7URV
> Yahoo! Groups Links