EMRFD Message Archive 4620

Message Date From Subject
4620 2010-05-02 02:19:59 ha5rxz In Praise of 'Ugly' Construction
Whilst looking for something totally unrelated I came across an amazing example of 'ugly' construction by Giancarlo Moda I7SWX. It's in the Files section filed under uglyconstruction.jpg Given Giancarlo's knowledge and experience I am sure that the circuit works very well but I would hesitate to show it to people of a nervous disposition.

Of course, I am sure that someone else could build a REALLY ugly project. Does anyone accept the challenge?

HA5RXZ
4621 2010-05-02 04:00:54 zl1bnb Re: In Praise of 'Ugly' Construction
That's not 'ugly´ -- that's ´hay-wire´

de miken, zl1bnb

4622 2010-05-02 04:10:57 Russell Shaw Re: In Praise of 'Ugly' Construction
ha5rxz wrote:
> Whilst looking for something totally unrelated I came across an amazing example of 'ugly' construction by Giancarlo Moda I7SWX. It's in the Files section filed under uglyconstruction.jpg Given Giancarlo's knowledge and experience I am sure that the circuit works very well but I would hesitate to show it to people of a nervous disposition.
>
> Of course, I am sure that someone else could build a REALLY ugly project. Does anyone accept the challenge?

I made a 1.0-30MHz wideband noise source using a noisecom diode, 3 mmics, and a
5-pole tchebyshev LC filter. It was made by soldering 0805 Rs, Cs, and 1008 size
Ls end-to-end, all on a blank pcb (no islands scratched in). It worked and
didn't look that ugly, but was prone to fractured components if the pcb was
flexed.
4623 2010-05-02 10:20:28 ajparent1 Re: In Praise of 'Ugly' Construction
I build a lot using dead-bug or as some call ugly. a trick I use for
dealing with SMT fracture if the board flexes is to give it a spine
4624 2010-05-02 16:10:03 Tayloe Dan-P26412 Re: In Praise of 'Ugly' Construction
I do a lot of deadbug construction for prototyping. I went looking for
a few recent projects (like the deadbug TUT-80) and could not find one.
However, I did find an early deadbug prototype of a NC2030.

Look in the pictures section under N7VE. The round tin on top was the
3v switching supply to efficiently convert 12v down to 3v since the
receiver primarily ran off of 3v.

Notice the size difference between the deadbug prototype and the final
version!

I like to use # 30 or # 32 gauge enamel wire as hook up wire. It is the
right size for these small SOIC ICs, it is very cheap, and it works for
almost everything until you get to the finals.

- Dan, N7VE

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4625 2010-05-03 04:54:43 victor Re: In Praise of 'Ugly' Construction
I have added my example of "dead bug" construction of a 10m phasing SSB transceiver that I had built.
One side is the receiver and the other side is the Tx. The PA is off board.
It is posted in Photos section under my callsign - 4Z4ME.
Victor - 4Z4ME
4626 2010-05-03 08:28:27 Tim Re: In Praise of 'Ugly' Construction
I got to see some of Jim Williams' "art type" electronic projects once. They were truly haywire. I mean, literally, no board involved at all. All the components hanging in midair in a kind of ball. I used to know where to find some pictures online but cannot find them right now.

Ah, here's a pic, the front cover of this book, click on it to zoom in:

http://www.amazon.com/Science-Analog-Circuit-Design-Engineers/dp/0750670622

Jim Williams has a very excellent App Note published by his employer. Excellent tutorial on breadboarding for RF applications. I highly recommend it, good pictures on pages 100 to 120 but there's good informati