How do you design these days?

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I thought so. But i haven't had my hands on any for 20 years now.

Many

PC

I think lots of people have hardlines fabbed and then something goes wrong, project canceled, wrong length, whatever, and they wind up on ebay. There are lots of SMBs, too, from Cisco systems or something.

I just bought 30 SMA "connector savers" (short male-female things) for about $1.50 each, ebay again. They are at least $10 each from regular sources.

John

made=20

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=20

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With prices like that i cannot afford to mess with the chemicals = involved.

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recommended=20

=20

ago I=20

router, is=20

Hmm. 0 vs 0. But not so much the learning curve. =20 Besides i detest doing anything twice without serious specific = need/requirement.

=20

What state was that?

-- "Electricity is of two kinds, positive and negative. The difference is, I presume, that one comes a little more expensive, but is more durable; the other is a cheaper thing, but the moths get into it." (Stephen Leacock)

I've been a resident of AZ since college. Bowmar had a division in Chandler, AZ, but was actually a multinational corporation... IIRC based in Canada. I think only the US operations went bankrupt. My general bet would be that Bowmar (US) was incorporated in Delaware. ...Jim Thompson

EWB is free now? Last time one of my engineers wanted a copy we paid a few hundred but that was more than ten years ago. Way back when I used ECA224 and IIRC that flowed into EWB but I have to say I wasn't too impressed with EWB in the late 90's.

need/requirement.

Yep, same here, if something works for ya don't change it.

for the=20

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router, is=20

Unless i misread, i thought he said has an old version.=20

need/requirement.

And after learning at least 4 different schematic capture / general CAD = systems, i am=20 pretty much quickly productive in just about any such tool.

That figures ;-(

is

need/requirement.

systems, i am

Same here. However, you will have to re-do most of the libraries every time you switch and that can cost weeks of boring grunt work. It doesn't matter how fast you are able to adapt, that work will have to be done no matter what.

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=20

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Perhaps. I think that everything not totally standard in most of my = tools=20 is obsolete or proprietary.

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I like your hand work, John. It's a lot like things I have done.

Here's a link to a picture of a test board I made a while ago...

It's a diode doubler for 5 MHz to 10 MHz on FR4, based on the two diode doubler here:

I did it so I could try a few different kinds of transformers like the ferrite binocular one I wound in this picture.

To cut the copper I use a round diamond dental bur. A few years ago I bought 30 or 40 of a couple different types from a seller on ebay. Something like current auction 260491962839. I think the ones I use most were 1.1 mm dia round ball ends. I draw the lines I want to cut with a fine sharpie and then cut it by hand with a Dremel. I find this faster, easier and safer than a blade. Not too difficult to cut narrow lines, especially if you do it under some magnification.

If I need to remove a wider piece of copper, I cut the edge of the pattern, then use a hot iron to unstick and peel the copper.

You need a very small collet in the dremel chuck. I think the bur shafts are about 1.6 mm dia.

Here's another one I did this way...

I found a nice MTI 5 MHz OCXO on ebay. It was mounted on a small circuit board that just fed it DC. The oscillator wanted only about 10 V and I wanted to be able to run it from a 12 V battery, so I cleaned down to copper on the back side of the board and cut some (planned) square pads to add this regulator.

Ok, but that doesn't say that they are thinking about curbing the right to your own antenna by some local authority. Freedom of information has a rather high place in our country and that's a good thing.

the

recommended

router, is

need/requirement.

systems, i am

Not at all here. Then again I do a lot of switch mode converter design and there's lots of specialty chips and inductors. Same for the RF stuff I do.

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Many

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Nice ones. I like this kind of breadboarding, and it works with surface-mount parts well into the GHz zone. Coplanar waveguide works great here.

I also like edge-launch SMA or SMB connectors to feed in and out, or just a hardline pigtail with an SMA on the other end. Regular square-flange SMAs can be butt-soldered to both sides of a CPW board and make great edge-launchers... better in fact than "official" edge-launch connectors.

I'll have to try some dental burrs. One could probably use a steel ruler as a cutting guide. I would follow up with my trademark Scotchbrite rub.

Favorite diode: Skyworks SMS7621-079, 0.22 pF. Skyworks has a great sample kit full of various schottky, varactor, and limiter diodes.

John

ONLY if not Constitutionally forbidden from infringing State's rights. ...Jim Thompson

-- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at

What good is the right to erect any antenna, if they give the spectrum to someone else? Those special interest groups are out to take everything they think they can possibly use. Wi-Fi on Channel 2? Give me a break!

If they get their way there will be no 'Free TV'. You will have to use cable or a sat service to get anything at all.

Where is 'Freedom of information' if you have to pay for it every month? What is there to stop continuous rate increases if local TV is removed from the equation? HTH will you get information about local events or emergencies when a storm blocks reception of the Ku band?

BTW, it looks like WOGX moved their studios to Gainesville recently. I will be near the old studio site in a few days and will see if it's still in use.

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