yacht boy 400 service manual

Grundig Yacht Boy 400 Service Manual

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Grundig Yacht-Boy 400

Portable World Receiver (1981)

Grundig Radios

This radio is relatively good sounding for the size and has good AM and FM reception. The sound is not as good as on the older, bigger Satellites or Yacht Boys, though. The tone switch is not always sufficient to adjust for a balanced sound. Usually it sounds good with the tone switch in high position on FM, low on AM. I did not check the stereo FM capabilities via headphones. Unfortunately the station memory loses all stations when batteries are removed. It may keep them for some minutes while replacing batteries. But, as the radio drains the batteries within months of non use, you will end up with an empty memory. That battery drain is not acceptable. For a radio, supposed to be used on a vacation or other occasional events, this is the weakest spot of this radio. The cabinet feels cheap and is a little squeaky when twisted/moved. Other than that, not a bad radio. SSB is a nice feature. This radio is nice for a vacation, but not really useable as an everyday solution.

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• Grundig Manuals
• GRUNDIG YB400

Grundig YB400 Manual

• page of 30 Go / 30

Table of Contents

• Grundig Toll-Free Phone Number
• Your Radio At-A-Glance
• Initial Setup
• Supplying Power
• General Radio Operation
• Shortwave Radio Operation
• More Information about Shortwave
• Storing Stations into Memory
• Using Clock, Alarm, and Sleep Timer Features
• Signle Sideband (Ssb) and Two-Way Communications
• Time Stations
• Technical Information
• INDEX to the RADIO'S CONTROLS (Buttons, Switches, and Sockets)

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• 1 Your Radio At-A-Glance
• 2 Initial Setup
• 3 General Radio Operation
• 4 Storing Stations into Memory
• 5 Using Clock, Alarm, and Sleep Timer Features
• 6 Technical Information
• Download this manual

Related Manuals for Grundig GRUNDIG YB400

Summary of Contents for Grundig GRUNDIG YB400

• Page 1 WORLD RECEIVER YACHT BOY 400 PE...

Page 2: Grundig Toll-Free Phone Number

Page 3: table of contents, page 5: initial setup, page 6: supplying power, page 7: general radio operation.

• Page 8 FM STATION EXAMPLE: to tune the frequency 105.7 mega- Experiment and let your ears judge which position, HIGH or hertz in the FM band, press 1 0 5 . 7, then press the FREQU./ LOW, you like best. METER button. Be sure to include the decimal point in FM frequencies.
• Page 9 When the radio is off: Pressing the LOCK button locks all keys. This will keep the radio from accidentally turning on when packed in a briefcase, etc. When you want to listen to your radio, press In AM (MW), SW, and LW (see below), the STEP button provides selection of the best tuning steps, in kilohertz.

Page 10: Shortwave Radio Operation

Page 11: more information about shortwave, page 12: storing stations into memory.

• Page 13 HOW TO ERASE THE CONTENTS OF A MEMORY Enter the memory’s number e.g. 2 5 , then press FREE twice.

Page 14: Using Clock, Alarm, And Sleep Timer Features

• Page 15 60 through 0 minutes. HOW TO USE THE DIAL LIGHT (button on top of radio) The LIGHT button causes the display to be illuminated. After 10 seconds, or when the LIGHT button is pressed again, the light will go out.
• Page 16 Shortwave listening is generally at its poorest during the daylight The best daytime band. hours of about 10 a.m. to 3 p.m. The major reason for this is that the broadcasters are not transmitting to North America at this Similar to 19m (fewer stations).
• Page 17 If deliberately transmitting to North America. These bands may be you are in a building with one or more stories above you, signals extremely good around sunset and sunrise too. Best bands are can also be impaired in strength.
• Page 18 2.300-2.490 2300-2490 do not deliberately target North America, but can be heard anyway. Whether or not a country can be heard depends on many factors, including signal strength, your geographic location, and the condition of the earth’s ionosphere. Frequencies in BOLD are mainly used for the country’s native language broad-...
• Page 19 Evening: 5975, 6175, 7325, 9590, 9640, 15260 Germany (Deutsche Welle): 5960, 6040, 6045, 6075, 6085, 6100, 6120, 6145, 6185, 9515, 9565, 9535, 9640, 9545, 9650, For fully comprehensive listings of the broadcast schedules of all 9670, 9700, 9730, 9735, 11705, 11740, 11750, 11810, 11865,...
• Page 20 CANNOT be heard. For these, use a VHF/ UHF scanner CAN I HEAR A SPECIFIC COUNTRY? Yes, if that country is transmitting its signal specifically for listen- ing in your part of the world. Otherwise, it may range from good to impossible.
• Page 21 If there is little or no improvement in signal strength, an outdoor antenna will help; however, the amount of improvement will HOW IS IT THAT BROADCASTS FROM AROUND THE WORLD CAN BE HEARD ON A SHORTWAVE RADIO? depend on the type of antenna used.
• Page 22 Coordinated Universal time (UTC), also known as Greenwich Mean Time (GMT), World Time and Zulu Time. Just what is UTC? It is the time in Greenwich England with no correction for daylight savings time, and is always stated in 24 hour format.
• Page 23 SHORTWAVE GUIDES AND MAGAZINES AVAILABLE IN BOOKSTORES ACCESSORIES, ANTENNAS, MAGAZINES, BOOKS, ETC. If you cannot find these publications locally, call our toll-free number. We will help you find them. Call Grundig for Information PASSPORT TO WORLD BAND RADIO, International Broadcasting Services, Ltd., Box 300, Penn’s Park, Pennsylvania 18493.

Page 24: Signle Sideband (Ssb) And Two-Way Communications

• Page 25 Below are some selected frequency ranges on which SSB communication can be found. All frequencies are shown in Kilohertz. AMATEUR RADIO AERONAUTICAL (usually USB) MARITIME (usually USB) 3700-4000, LSB, night. 2850-3155 4063-4438 3400-3500 6200-6525 7150-7300, LSB, night. 4650-4750 8195-8815 5480-5730 12230-13200 14150-14350, USB, day.
• Page 26 CAN; Edmtn AB, each hr. + 20 MIN, 2300 10051 New York, NY; 24 hr. 1200 6501 U.S. Coast Guard 10051 CAN: Gander NF; 25, 30, 50, 55 min past hr. 6501 Virginial 1130, 1600, 2200, 2330 12382 Oakland, CA; 5, 10, 35, 40 min past hr. 6501...

Page 27: Time Stations

• Page 28 CQ Communications, Inc., 76 North Broadway, Hicksville, NY 11801-2953. GETTING MORE INFORMATION ABOUT SSB COMMU- Phone (516) 681-2922. Monthly Magazine NICATION Please contact Grundig by phone. We will guide you to resources such as companies with excellent catalogs full of shortwave...

Page 29: Technical Information

Page 30: index to the radio's controls (buttons, switches, and sockets), this manual is also suitable for:, rename the bookmark, delete bookmark, delete from my manuals, upload manual.

• Yacht Boy 400
• User Manual

Grundig Yacht Boy 400 User Manual

Grundig Yacht Boy 400 PE manual

user manual Grundig Yacht Boy 400 PE

View the manual for the Grundig Yacht Boy 400 PE here, for free. This manual comes under the category radios and has been rated by 2 people with an average of a 9.4. This manual is available in the following languages: English. Do you have a question about the Grundig Yacht Boy 400 PE or do you need help?  Ask your question here

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Question and answer

Can't find the answer to your question in the manual? You may find the answer to your question in the FAQs about the Grundig Yacht Boy 400 PE below.

What is the difference between FM and AM?

FM stands for Frequency Modulation and AM stands for Amplitude Modulation. The biggest difference between FM radio stations compared to AM radio stations is the sound quality.

When is my volume too loud?

A volume above 80 decibels can be harmful to hearing. When the volume exceeds 120 decibels, direct damage can even occur. The chance of hearing damage depends on the listening frequency and duration.

How can I best clean my radio?

A slightly damp cleaning cloth or soft, dust-free cloth works best to remove fingerprints. Dust in hard-to-reach places is best removed with compressed air.

What is bluetooth?

Bluetooth is a way of exchanging data wirelessly between electronic devices via radio waves. The distance between the two devices that exchange data can in most cases be no more than ten metres.

Is the manual of the Grundig Yacht Boy 400 PE available in English?

Yes, the manual of the Grundig Yacht Boy 400 PE is available in English .

Is your question not listed? Ask your question here

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Grundig Yacht-Boy-400 Service Manual

Grundig Yacht Boy 400 – Low Cost DRM Mod

Introduction

In this document we present a modification to the Grundig YB400 short-wave receiver to make it suitable for DRM down-frequency conversion. As we do not have schematics of this receiver, we have been forced to make tests by ourselves… and four receivers later we have achieved a suitable modification which has been able to decode a -87 dBm channel power signal.

This receiver adaptation allows a low cost solution (about for DRM reception. The output signal can be decoded by a software receiver which gets it from the sound card line input.

Receiver Modification

The modification consists in the following three steps:

∙ Get a 455 KHz IF signal with a bandwidth greater than 10 KHz, tuned to the desired RF channel.

∙ Down-convert it to a 12 KHz IF signal.

∙ Amplify this last signal.

The desired 455 KHz IF signal can be found in the pad remarked in figure 1.

Figure 1. 455 KHz IF output (without filtering).

It must be taken into account that the signal level at this point is not affected by the AGC (Automatic Gain Control), so it will not be very powerful. We are working it out by now but, for the moment, an audio amplifier at the output does the work. This will be explained later.

This frequency is set to be 455 KHz although it could be shipped with a centering error. We have found it to be as big as 300 Hz in one model. This can be solved just by adjusting a resonator blue marked in figure 2.

Another important fact about this signal bandwidth is that it is only limited by the RF and IF1 (55.85 MHz) filters, which is quite wide (a 50 KHz BW was measured). The effects of this greater bandwidth are a noise increment and the appearance of the image frequency (current transmissions are isolated enough to avoid this last one). A simple filter design will be presented soon, for the moment an unfiltered signal is still suitable.

The last fact relating to this filter is that it may have not been correctly tuned in the manufacturing process, causing an asymmetric response. This does not have a visible effect in the base band AM signal (aside from a Signal to Noise Ratio reduction), but it has for the 12 KHz DRM output. This effect can be solved just by tuning a couple of resonators while monitoring it in a spectrum analyzer. These two points are red marked in the following figure:

Figure 2. IF filter tuning.

The second step, the down-conversion to a 12 KHz IF, has been solved using the 467 KHz mixer used in the other receivers modifications presented in this site. This output would suffice for the line input of the sound card, but without the AGC working an extra powering is needed.