Grundig YB400 service manual needed

[msg]

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

 

[Arfa Daily]

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

 

[Michael Black]

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

 

[msg]

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

 

[msg]

"Arfa Daily" ([email protected]) writes:



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

 

[msg]

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

 

[Michael A. Terrell]

Aren't there any homebrewers here?

--
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

 

[msg]

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

 

[Michael A. Terrell]

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

 

[Arfa Daily]

<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

 

[Arfa Daily]

<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

 

[msg]

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

 

[DaveM]

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.

 

[msg]

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

 

[Arfa Daily]

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

 

[msg]

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