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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Grundig YB400 service manual needed
Greetings:
I have built a software controlled receiver based on the RF section from a Grundig YB400 (YB 400, Yacht Boy 400) radio; I have the schematics from the Grundig service manual (kindly posted to a web forum) but I need to locate the remainder of the service manual for component call-outs and alignment data among other things. I have generated some call-out graphics from tedious tracing under a magnifier but many components are hidden under shields which I won't remove until necessary and tracing the remainder of the rig would take quite a stretch of time. Doe anyone have this book in electronic or hardcopy form? Much thanks in advance, Michael |
#2
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Grundig YB400 service manual needed
"msg" wrote in message ... Greetings: I have built a software controlled receiver based on the RF section from a Grundig YB400 (YB 400, Yacht Boy 400) radio; I have the schematics from the Grundig service manual (kindly posted to a web forum) but I need to locate the remainder of the service manual for component call-outs and alignment data among other things. I have generated some call-out graphics from tedious tracing under a magnifier but many components are hidden under shields which I won't remove until necessary and tracing the remainder of the rig would take quite a stretch of time. Doe anyone have this book in electronic or hardcopy form? Much thanks in advance, Michael Software Controlled Radio or Software *Defined* Radio ? If the latter, I would have thought that a Yacht Boy would not have had the front-end performance to sufficiently showcase an SDR module. Just interested. Sorry, don't have the service info for that model. Arfa |
#3
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Grundig YB400 service manual needed
"Arfa Daily" ) writes:
Software Controlled Radio or Software *Defined* Radio ? If the latter, I would have thought that a Yacht Boy would not have had the front-end performance to sufficiently showcase an SDR module. Just interested. Sorry, don't have the service info for that model. It's an old style radio. ANd the guy hasn't designed anything, he's stealing the design, and hasn't even gotten that far, or else he'd not be looking for the schematic. When I got an older Grundig shortwave receiver last fall at a community sale, it wasn't long before I had the cover off, and at least had a general layout of the circuit, just by looking at it. If someone is going to steal a design, at least they should do thw work. Michael |
#4
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Grundig YB400 service manual needed
Arfa Daily wrote:
"msg" wrote in message ... Greetings: I have built a software controlled receiver based on the RF section from a Grundig YB400 snip Software Controlled Radio or Software *Defined* Radio ? If the latter, I would have thought that a Yacht Boy would not have had the front-end performance to sufficiently showcase an SDR module. Just interested. snip Thanks for your reply; no it is not SDR. The RF section from the radio was a convenient starting point for a personal project. Regards, Michael |
#5
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Grundig YB400 service manual needed
Michael Black wrote:
"Arfa Daily" ) writes: Software Controlled Radio or Software *Defined* Radio ? If the latter, I would have thought that a Yacht Boy would not have had the front-end performance to sufficiently showcase an SDR module. snip ANd the guy hasn't designed anything, he's stealing the design, and hasn't even gotten that far, or else he'd not be looking for the schematic. snip Please refrain from unwarranted vitriol; in my post I stated that I had the schematics, I just hoped to find the rest of the book. This is a personal project and I should have written 'used the RF section from a YB 400' rather than 'based on the RF section from a YB 400'. Aren't there any homebrewers here? Regards, Michael |
#6
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Grundig YB400 service manual needed
msg wrote:
Greetings: I have built a software controlled receiver based on the RF section from a Grundig YB400 (YB 400, Yacht Boy 400) radio; I have the schematics from the Grundig service manual (kindly posted to a web forum) but I need to locate the remainder of the service manual for component call-outs and alignment data among other things. I have generated some call-out graphics from tedious tracing under a magnifier but many components are hidden under shields which I won't remove until necessary and tracing the remainder of the rig would take quite a stretch of time. Does anyone have this book in electronic or hardcopy form? I must mention that I tried to purchase a manual from 'Eton', the current owner of the Grundig radio line and I was told that they don't have this manual, that it was unavailable to them. Ergo, my usenet request. The service manual was published in Germany and was not restricted. Regards, Michael |
#7
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Grundig YB400 service manual needed
msg wrote:
Aren't there any homebrewers here? news:rec.radio.amateur.homebrew -- Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida |
#8
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Grundig YB400 service manual needed
Michael A. Terrell wrote:
msg wrote: Aren't there any homebrewers here? news:rec.radio.amateur.homebrew Indeed; if you check the archives you'll find my post to that NG with this request some weeks ago. It seems to me more likely that folks involved in depot repair and service will potentially have the manual and are more likely to read this NG... Regards, Michael |
#9
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Grundig YB400 service manual needed
msg wrote:
Michael A. Terrell wrote: msg wrote: Aren't there any homebrewers here? news:rec.radio.amateur.homebrew Indeed; if you check the archives you'll find my post to that NG with this request some weeks ago. It seems to me more likely that folks involved in depot repair and service will potentially have the manual and are more likely to read this NG... Have you contacted the factory authorized service center(s)? -- Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida |
#10
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Grundig YB400 service manual needed
"msg" wrote in message ... Michael Black wrote: "Arfa Daily" ) writes: Software Controlled Radio or Software *Defined* Radio ? If the latter, I would have thought that a Yacht Boy would not have had the front-end performance to sufficiently showcase an SDR module. snip ANd the guy hasn't designed anything, he's stealing the design, and hasn't even gotten that far, or else he'd not be looking for the schematic. snip Please refrain from unwarranted vitriol; in my post I stated that I had the schematics, I just hoped to find the rest of the book. This is a personal project and I should have written 'used the RF section from a YB 400' rather than 'based on the RF section from a YB 400'. Aren't there any homebrewers here? Regards, Michael Yes, I am both licensed, and an old-school home brewer, which is why I was interested in exactly what you were talking about, and what you were trying to do with it. This month's RadCom has an article which actually deals with the principle of what it would seem that you are trying to do, using an old FT290 as a VHF front end for an SDR module - that's assuming that we are talking SDR here, a point which you haven't cleared up yet. Arfa |
#11
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Grundig YB400 service manual needed
"msg" wrote in message ... Arfa Daily wrote: "msg" wrote in message ... Greetings: I have built a software controlled receiver based on the RF section from a Grundig YB400 snip Software Controlled Radio or Software *Defined* Radio ? If the latter, I would have thought that a Yacht Boy would not have had the front-end performance to sufficiently showcase an SDR module. Just interested. snip Thanks for your reply; no it is not SDR. The RF section from the radio was a convenient starting point for a personal project. Regards, Michael OK. That's that cleared up then. So what exactly are you controlling, and with what software ? Arfa |
#12
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Grundig YB400 service manual needed
Arfa Daily wrote:
"msg" wrote in message ... Arfa Daily wrote: "msg" wrote in message ... I have built a software controlled receiver based on the RF section from a Grundig YB400 snip Software Controlled Radio or Software *Defined* Radio ? If the latter, I would have thought that a Yacht Boy would not have had the front-end performance to sufficiently showcase an SDR module. Just interested. snip Thanks for your reply; no it is not SDR. The RF section from the radio was a convenient starting point for a personal project. snip OK. That's that cleared up then. So what exactly are you controlling, and with what software ? Thanks for asking. I designed a digital section to control the pll 1st LO, filter selection, BFO, and misc. power and control lines with provision for additional signals as the design progresses. I modified the RF section to accommodate my digital design, removed superfluous components no longer used and added modules at appropriate places where real estate permitted, changed the antenna input circuits and provided a 50 ohm bnc input. The RF section and digital section are separately encased in faraday cage shields, all dc lines are bypassed and filtered, serial i/o is ferrite choked and ground straps are liberally used. I have work to do yet to quench processor clock harmonics and mcu conducted RFI on a small number of i/o lines between the modules (I've reduced this RFI by about 10db since I started...). I may need to do some software-based autonotching to move the birdies out of the passband dynamically. I download operating code over an rs232 port which also serves as the control interface and I'm writing a comprehensive VT100-graphics based control program for a systems-agnostic way to operate the receiver. I will be posting a link to the website documenting this project soon (in rec.radio.amateur.homebrew) and will provide online access to the receiver with realtime RTP audio streaming. Regards, Michael |
#13
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Grundig YB400 service manual needed
"msg" wrote in message
... msg wrote: Greetings: I have built a software controlled receiver based on the RF section from a Grundig YB400 (YB 400, Yacht Boy 400) radio; I have the schematics from the Grundig service manual (kindly posted to a web forum) but I need to locate the remainder of the service manual for component call-outs and alignment data among other things. I have generated some call-out graphics from tedious tracing under a magnifier but many components are hidden under shields which I won't remove until necessary and tracing the remainder of the rig would take quite a stretch of time. Does anyone have this book in electronic or hardcopy form? I must mention that I tried to purchase a manual from 'Eton', the current owner of the Grundig radio line and I was told that they don't have this manual, that it was unavailable to them. Ergo, my usenet request. The service manual was published in Germany and was not restricted. Regards, Michael You might try http://home.arcor.de/walter.groer/schema.htm. They seem to have a pretty good stock of manuals and schematics for European made radios, including Grundig. The Grundig page lists the YB-400, but don't know if it's the complete manual or just the schematic. Six pages, if that helps. -- Dave M MasonDG44 at comcast dot net (Just substitute the appropriate characters in the address) Life is like a roll of toilet paper; the closer to the end, the faster it goes. |
#14
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Grundig YB400 service manual needed
DaveM wrote:
msg wrote: I have built a software controlled receiver based on the RF section from a Grundig YB400 (YB 400, Yacht Boy 400) radio; I have the schematics from the Grundig service manual (kindly posted to a web forum) but I need to locate the remainder of the service manual snip You might try http://home.arcor.de/walter.groer/schema.htm. They seem to have a pretty good stock of manuals and schematics for European made radios, including Grundig. The Grundig page lists the YB-400, but don't know if it's the complete manual or just the schematic. Six pages, if that helps. Thanks for the lead; I know that the service manual has at least 20 pages and the schematics as foldouts occupy 6 A4 pages so he must have only schematics. Also, he lists the year of introduction of the YB400 as '81 which is a bit odd since many ICs it uses weren't produced until the late '80s However, I will email him and inquire further. Regards, Michael |
#15
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Grundig YB400 service manual needed
"msg" wrote in message ... Arfa Daily wrote: "msg" wrote in message ... Arfa Daily wrote: "msg" wrote in message ... I have built a software controlled receiver based on the RF section from a Grundig YB400 snip Software Controlled Radio or Software *Defined* Radio ? If the latter, I would have thought that a Yacht Boy would not have had the front-end performance to sufficiently showcase an SDR module. Just interested. snip Thanks for your reply; no it is not SDR. The RF section from the radio was a convenient starting point for a personal project. snip OK. That's that cleared up then. So what exactly are you controlling, and with what software ? Thanks for asking. I designed a digital section to control the pll 1st LO, filter selection, BFO, and misc. power and control lines with provision for additional signals as the design progresses. I modified the RF section to accommodate my digital design, removed superfluous components no longer used and added modules at appropriate places where real estate permitted, changed the antenna input circuits and provided a 50 ohm bnc input. The RF section and digital section are separately encased in faraday cage shields, all dc lines are bypassed and filtered, serial i/o is ferrite choked and ground straps are liberally used. I have work to do yet to quench processor clock harmonics and mcu conducted RFI on a small number of i/o lines between the modules (I've reduced this RFI by about 10db since I started...). I may need to do some software-based autonotching to move the birdies out of the passband dynamically. I download operating code over an rs232 port which also serves as the control interface and I'm writing a comprehensive VT100-graphics based control program for a systems-agnostic way to operate the receiver. I will be posting a link to the website documenting this project soon (in rec.radio.amateur.homebrew) and will provide online access to the receiver with realtime RTP audio streaming. Regards, Michael Interesting project. I'd like to see the website when it's available. Arfa |
#16
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Grundig YB400 service manual needed
Arfa Daily wrote:
"msg" wrote in message snip I will be posting a link to the website documenting this project soon (in rec.radio.amateur.homebrew) and will provide online access to the receiver with realtime RTP audio streaming. Interesting project. I'd like to see the website when it's available. Hi, I sent you an email with the URL to my preliminary site for accessing the receiver. If you did not get it, please contact me at msg _at_ cybertheque _dot_ org. Thanks, Michael |
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