radiomuseum.org
Please click your language flag. Bitte Sprachflagge klicken.
 

harman: 'Counterpoint'; A-400 (A400) schematic

Moderators:
Martin Renz Ernst Erb Vincent de Franco Martin Bösch Bernhard Nagel Otmar Jung Heribert Jung Eilert Menke 
 
Please click the blue info button to read more about this page.
Forum » Radios and other type of sets (Physics) etc. » MODELS DISPLAYED » harman: 'Counterpoint'; A-400 (A400) schematic
           
Joe Sousa
Joe Sousa
Editor
USA  Articles: 664
Schem.: 214
Pict.: 434
16.May.09 06:16

Count of Thanks: 5
Reply  |  You aren't logged in. (Guest)   1

Dear Forum members,

I have a schematic for the Harman-Kardon A-400 FM tuner from 1956, but it is in a very efficient pdf format. I have found it very difficult to separate out the pdf pages and re-convert them to gif format without significant loss in quality and increase in overall file size.

I have used GSview and IrfanView and Photoshop, but the results result in some degradation and file size increase.

The file linked above is only 438kB in size, and includes 5 high quality scans that meet RM standards before they are taken appart for gif uploading.

If an RM admin can take the pdf and simply separate out the pdf pages for the schematic upload in the model page, it would be the best way to retain quality without a size increase. I use the pdf995 utility for pdf page merge and separation.

If an RM member would like to try converting this pdf into gif form with good results, please feel free to do so and increase your reserve of UACS points.

I obtained the pdf from the Harman-Kardon web site. They offer the schematics as a courtesy without distribution restrictions.

Regards,

-Joe

Michele Denber
Michele Denber
 
USA  Articles: 129
Schem.: 5
Pict.: 64
16.May.09 07:48

Count of Thanks: 8
Reply  |  You aren't logged in. (Guest)   2

Which 995 program did you use?  I just ran pdfedit995, selected the "Image" menu and then "Convert the last document printed to images".   You can also set the desired resolution there too.  It automatically creates a set of individual image files, one for each page in the pdf.

I just did this with your schematic and uploaded it to the model.  At 300 dpi, this turned into a 128K GIF file.  Conversion of the remaining pages is left, as they say, as an exercise to the reader :-)

Joe Sousa
Joe Sousa
Editor
USA  Articles: 664
Schem.: 214
Pict.: 434
16.May.09 08:21

Count of Thanks: 3
Reply  |  You aren't logged in. (Guest)   3

Michelle, I downloaded your upload, and the schematic extraction showed no degradation. The file size at 78k did not grow either, as compared to one fifth of the original 5 page PDF size of 439k.

I own a copy of pdf995edit, but I just bought it recently. I have used the image extraction before, but perhaps not at 300dpi. I will have to remember that next time.

Thanks for the quick help.

My offer still stands for the remaining pages, in case someone could use a few quick UACS points.

Regards,

-Joe

  
rmXorg