Title: 75A-3 Schematic? Post by: steve_qix on January 30, 2009, 03:07:00 PM Hi !
I have been looking EVERYWHERE on the 'net for a schematic of the 75A-3. I can find A-4s, A-2s, but no A-3s. Sure, I could probably pay for one, but really - all the others are out there, I just can't find this one ! Any help or ideas would be greatly appreciated ! Thanks and Regards Steve Title: Re: 75A-3 Schematic? Post by: w8khk on January 30, 2009, 03:58:00 PM Hi Steve,
I have an original manual for the 75A-3. The schematic is a fold-out, three pages. If I scan each page individually, you could print and piece them together. Would that work for you? If so, what format file would you prefer, and should I post it here or email it? 73, Rick Title: Re: 75A-3 Schematic? Post by: steve_qix on January 30, 2009, 04:21:58 PM Hi Steve, I have an original manual for the 75A-3. The schematic is a fold-out, three pages. If I scan each page individually, you could print and piece them together. Would that work for you? If so, what format file would you prefer, and should I post it here or email it? 73, Rick That would be perfect !! I think I read pretty much any format. As long as the resolution is preserved, I should be able to put it back together over here. Someone else may need this as well. I can make a .PDF of the materials I get from you (if you can't make a PDF), and post it on this site somewhere (need admin guidance here) for everyone's benefit. I sure appreciate your help in this! Regards, Steve Title: Re: 75A-3 Schematic? Post by: w8khk on January 30, 2009, 04:39:06 PM Steve,
the schematic pages have been emailed to your email address on file with qrz. If you could make the pages available to forum members as a pdf, that would be great. Best regards, Rick Title: Re: 75A-3 Schematic? Post by: WA1GFZ on January 30, 2009, 04:42:54 PM Steve, I may also have a copy. Let me know if you need it and I will look for mine and scan.
Title: Re: 75A-3 Schematic? Post by: Pete, WA2CWA on January 30, 2009, 05:21:48 PM You guys do things the hard way.
Title: Re: 75A-3 Schematic? Post by: w8khk on January 30, 2009, 05:36:50 PM You guys do things the hard way. See attached. OK, Pete, do you care to tell us where you found this? Google was NOT my friend today. Title: Re: 75A-3 Schematic? Post by: Pete, WA2CWA on January 30, 2009, 05:53:42 PM You guys do things the hard way. See attached. OK, Pete, do you care to tell us where you found this? Google was NOT my friend today. (http://www.classicradiomanuals.com/images/mman.gif) This is where I get all my info: http://www.manualman.com/ Great person to deal with. Has over 18,000 of them :D Salt of the earth 8) Loves dogs, especially Eski's. Title: Re: 75A-3 Schematic? Post by: w8khk on January 30, 2009, 06:15:14 PM Interesting site. Funny it did not come up when I searched for 75A-3 manual or schematic. Thanks for sharing the pdf.
Title: Re: 75A-3 Schematic? Post by: Pete, WA2CWA on January 30, 2009, 09:54:44 PM Interesting site. Funny it did not come up when I searched for 75A-3 manual or schematic. Thanks for sharing the pdf. We try to keep the web spiders and crawlers out as best we can. ;D Title: Re: 75A-3 Schematic? Post by: steve_qix on January 31, 2009, 08:52:50 AM Thanks so much for all of the responses and help !!!
I really appreciate it ;D Now I'll be able to fix the receiver !!!!! Thanks and Regards, Steve Title: Re: 75A-3 Schematic? Post by: WA1GFZ on January 31, 2009, 06:34:59 PM 75A3 has the most bogus bias set up I have ever seen. I had a beautiful one once too nice to modify so I unloaded it.
Title: Re: 75A-3 Schematic? Post by: W3RSW on February 02, 2009, 09:04:37 PM Boy, if you find another reasonably priced nice one let me know.
A Standard Products product detector simply inserted in the FM adaptor octal socket would have made a nice radio out of it. - And a very broad AM filter could have been placed across one of the filter 'slots,' simply say an .005uf loaded on each side by a 10k to 15k resistor. As you know, the fun thing about these rigs with stable oscillators and beefy front ends is bringing out the IF to a panadaptor, or these days a SDR or Softrock, etc. Title: Re: 75A-3 Schematic? Post by: W3RSW on February 19, 2009, 10:49:16 AM Quote Pete, WA2CWA Moderator Member Re: 75A-3 Schematic? « Reply #5 on: January 30, 2009, 06:21:48 PM » Quote You guys do things the hard way. Pete, I see you pulled the schematic and the "see attached below" reference. Problem with copying from the manual supplier? I kind of wondered when you did it the first time. ;D when you revise history, you have to revise all the copies too, heh, heh. Title: Re: 75A-3 Schematic? Post by: Pete, WA2CWA on February 19, 2009, 01:41:16 PM Quote Pete, WA2CWA Moderator Member Re: 75A-3 Schematic? « Reply #5 on: January 30, 2009, 06:21:48 PM » Quote You guys do things the hard way. Pete, I see you pulled the schematic and the "see attached below" reference. Problem with copying from the manual supplier? I kind of wondered when you did it the first time. ;D when you revise history, you have to revise all the copies too, heh, heh. Steve requested it and posted he got it. I saw no reason to keep it up there indefinitely. Title: Re: 75A-3 Schematic? Post by: W3RSW on February 19, 2009, 02:30:32 PM OK. AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
makes sense and sorry for being a smarty. -really. Rick |