[RossH]

I'm in need of a clear schematic for my 41-255.  I have exhausted all my links for one (Rider, Beitman, 1941 Philco Yearbook, Radio Museum, and Nostalgia Air).  It appears the Philco Repair Bench is defunct. Does any one have a clearly legible schematic?
Thank you.

[GarySP]

Welcome to the Phorum, RossH! The schematic you are looking for is in the Philco Radio Library, service info, 1941 yearbook.
https://philcoradio.com/library/index.ph...year-book/
Hope this helps! Take care and BE HEALTHY! Gary

[RossH]

Thank you, Gary. This is the same one I have and is largely unreadable in the small print. I was hoping to find a first generation scan, but may be relegated to purchasing an original  1941 Yearbook, provided they're any better. Thank you again for responding.

[RodB]

You can find it on page 98, 1941 Beitman here
https://www.google.com/url?sa=t&source=w...4xxoMdhUwl

[klondike98]

Ross
The link that Gary sent you leads to a pdf file that can be downloaded to a PC and then viewed at very large sizes with a pdf reader like adobe acrobat reader.

[RossH]

Yes, I have the Beitmans, Rider, but they are unreadable in the finer print, even at up to 400 magnification. I have found numerous copies and they're all several generations removed of copies and scans of the original. I was hoping for a clean scan of the schematic out of the 1941 Yearbook, provided the original is good.

[Chas]

This is a page extraction of Riders PDF, original scanner unknown. If this is good enough, fine. If not I have the original Riders page and can scan at 1200 dpi which would yield a 15mb file, or scan to such a file size limited to my email client.

I do agree, there are a lot of fine lines that are pointers but also mixed with wiring in the diagrammatic representations.

I may have a 1941 Philco yearbook, but cannot put my hands on it. If I do it may be printed at a higher resolution than the Riders original print, dunno. If it is that would be the most resolve of any publication.

Advise to Phorum I will be notified of your response.

PDFsam_vol_12.pdf Size: 62.91 KB  Downloads: 79

If I scan I will input as a color file and then alter contrast/brightness to enhance "missing" line yet, try to maintain resolution in the text. Followed by conversion to B & W (two bit) file for best compression by the PDF creator (Gimp)...

Try importing the file provided into a photo processor and determine if can be enhanced. It appears to be RGB

GL

Chas

[RossH]

I have PhotoShop and will try it. Will let you know. Thank you for your response.

[radiorich]

Hello Ross,
Yes, I have had good luck with using my Photoshop in the past to improve schematics and other documents !.

Sincerely Richard

[DaleHCook]

Ross -

I have an original 1941 Yearbook, but it will be at least a few days before I can get it out of storage and make a high-res scan.

[RossH]

Thank you, Dale. Please take your time. I tried cleaning up a scan in PhotoShop and it helped a little, but after 1.5 hrs I gave up.
Again, thank you very much.

[klondike98]

The scan from the Philco library was directly from a 1941 Yearbook. Not sure what is going on if you can't read it. I downloaded it and include it as an attachment here. I can open it in Adobe and read it clearly at 150% on my PC. Maybe this will work.

[RossH]

Thank you for scanning it, but this for the 220 and 225.  I need the one for 250 and 255.  The one I have, which is many generations away from the original, is on pages 72 and 73.

[morzh]

I have just gone to the link Gary provided in #2, the 1941 yearbook, and I do not see any whatsoever small print that I would have trouble reading. The sch is also fairly good.

[rfeenstra]

Ditto. Perfectly readable here. Monitor or computer problems?!