Notice: Effective January 1, 2007, BAMA will add only manuals with a
direct connection to the tube era of ham radio. Only manuals for
amateur radio transmitters, receivers, antenna tuners, antennas,
keyers, etc. will be added to the collection.

Why not also require that diagrams must be properly scanned. Many diagrams on
the site can hardly be read.

People tend to use lossy compression methods (jpg, djvu) that are generally
unsuitable for schematic diagrams. Probably this is an heritage of times when
hard disks had limited capacity and we were still using 56k modems. Today using
djvu or other compression schemes makes little sense. For black and white, gif
or png can give a perfect reproduction with no big files.

73

Tony I0JX

"Antonio Vernucci" wrote in message
...
Notice: Effective January 1, 2007, BAMA will add only manuals with a
direct connection to the tube era of ham radio. Only manuals for
amateur radio transmitters, receivers, antenna tuners, antennas,
keyers, etc. will be added to the collection.

Why not also require that diagrams must be properly scanned. Many diagrams
on
the site can hardly be read.

People tend to use lossy compression methods (jpg, djvu) that are
generally
unsuitable for schematic diagrams. Probably this is an heritage of times
when
hard disks had limited capacity and we were still using 56k modems. Today
using
djvu or other compression schemes makes little sense. For black and white,
gif
or png can give a perfect reproduction with no big files.

73

Tony I0JX


Some of us are still on dialup and a 10meg file takes forever to download.

"shark45" wrote in message
. ..

"Antonio Vernucci" wrote in message
...
Notice: Effective January 1, 2007, BAMA will add only
manuals with a
direct connection to the tube era of ham radio. Only
manuals for
amateur radio transmitters, receivers, antenna tuners,
antennas,
keyers, etc. will be added to the collection.

Why not also require that diagrams must be properly
scanned. Many diagrams
on
the site can hardly be read.

People tend to use lossy compression methods (jpg, djvu)
that are
generally
unsuitable for schematic diagrams. Probably this is an
heritage of times
when
hard disks had limited capacity and we were still using
56k modems. Today
using
djvu or other compression schemes makes little sense. For
black and white,
gif
or png can give a perfect reproduction with no big files.

73

Tony I0JX


Some of us are still on dialup and a 10meg file takes
forever to download.


DejaVu seems to be the problem. It _does_ produce very
small files but they are, as you state, of rather low
quality. PDF's are much better but are 4 or 5 times the
size even when set for fairly high compression. PDF's are
quite satisfactory. I don't like multi page publications
posted as a series of JPG's. They can, of course, be
converted to a PDF for printing by using a program like
PDFCreator. This is a small freeware program that appears as
a printer. One prints the desired documents to it and it
produces a PDF.
I can understand Mr. Grimm's problem: he is moving, will
not have a high-speed connection, and has limited time to
oversee the site. I think this site is a tremendously
valuable resource and he appears to be doing whatever he can
to maintain it. I hope that in the future he will be able to
return to offering test equipment manuals. I think we should
appreciate what is there and the amount of work that has
gone into creating and maintaining it.


--
---
Richard Knoppow
Los Angeles, CA, USA




--
Posted via a free Usenet account from http://www.teranews.com

Antonio Vernucci wrote:
Notice: Effective January 1, 2007, BAMA will add only manuals with a
direct connection to the tube era of ham radio. Only manuals for
amateur radio transmitters, receivers, antenna tuners, antennas,
keyers, etc. will be added to the collection.

Why not also require that diagrams must be properly scanned. Many diagrams on
the site can hardly be read.

To be entirely fair, many of the originals weren't widely available in
good quality either.

Many times I have an old photocopy of an old photocopy of an original
schematic, and I can't read the part values either. Sometimes the
originals (especially for ham equipment, not so much for test
equipment) that came in the manuals were barely readable too.

People tend to use lossy compression methods (jpg, djvu) that are generally
unsuitable for schematic diagrams.

This is certainly a huge factor. Look at the scan qualities at
bitsavers.org for example and you see that careful attention to
scanning and lossless compression are very worthwhile goals.

Tim.