Re: manhattan style pads

Wes Hayward <w7zoi@...>
 

Hi All,
 
Actually, I think that the Manhattan in the QRP construction method really refers to the use of straight wires on a 90 degree grid.   At least that is where the term originated.     Typical integrated circuits use a layout that follows a Manhattan format.  A recent reference is John Baliga, "Chips Go Vertical," IEEE Spectrum, March, 2004, pp43-47.    
 
I agree with Hans -- I have really seen no difference between construction on a ground plane when using pads and building without them, other than building without is faster.      There is rarely a need to go as high as 10M with the resistors if you don't have them around.   Something much smaller values will work just as well.
 
My son and I picked the term "ugly" on our 1981 QST paper "The Ugly Weekender" for a specific reason:   We wanted to emphasize that there is no relationship between circuit performance and the "pretty" nature of the construction, including that on a printed board.   In this case, it is the use of extensive ground plane that makes the circuitry work well.
 
73, Wes
W7ZOI
 

----- Original Message -----
Sent: Saturday, June 26, 2004 10:47 AM
Subject: Re: [BITX20] manhattan style pads


Mark, Bruce et al

I don't think the difference between "ugly" and "Manhatten" methods is all
that much.

My method is a bit of a hybrid I suppose. Mostly ugly. But if I find a point
needs to be better anchored I sometimes use a 10M resistor to ground (ok for
low impedance signal points) or a .22uF capacitor to ground (ok for dc
voltage points).

Sometimes I find I want pads. I mounted all the BITX20 inductors and
trifilar transformers on pads. But not nice circular pads like in the copper
island construction kit. I just find scraps of PCB stock and cut them up
into rough squares approximately 5mm x 5mm with a wire cutter. They're ugly
but it works and takes literally seconds.

73 Hans G0UPL
http://www.hanssummers.com


-----Original Message-----
From: Mark Jones
To: BITX20@...
Sent: Sat Jun 26 16:39:19 2004
Subject: RE: [BITX20] manhattan style pads

Bruce

I bought a "Copper island Construction Kit" but they ceased trading a while
ago, I found someone (and I can't remember who or find the e-mails) that
sent me some replacement (re-stock) pads via the GQRP reflector. I just paid
the postage - a great deal and very helpful, he said that a friend of his
was able to make them at work.

Sorry I can't help more - I thought about making some but it was just to
tricky.

Mark. G0MGX

-----Original Message-----
From: nd8i [mailto:bruceraymond@...]
Sent: 26 June 2004 16:28
To: BITX20@...
Subject: [BITX20] manhattan style pads


I've been using ugly-style construction,
which has worked quite well.  I've noticed
a bunch of constructors have used Manhattan-
style construction.  Not being willing to
leave well enough alone, I want to give it
a try.

Where do people get the pads?  Or how does
one make them from blank pcb material?  I
suspect that trying to punch them out of
pcb material is a pretty slow and tedious
process, so I suspect there must be a better
alternative.

tia,
Bruce





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