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Globetrotter Amateur 968.101B Ch= 8.101B (Ch= 768.101B)

Globetrotter Amateur 968.101B Ch= 8.101B ; Nordmende, (ID = 79535) Radio
 
Globetrotter Amateur 968.101B Ch= 8.101B ; Nordmende, (ID = 79536) Radio
 
Globetrotter Amateur 968.101B Ch= 8.101B ; Nordmende, (ID = 79537) Radio
 
Globetrotter Amateur 968.101B Ch= 8.101B ; Nordmende, (ID = 79538) Radio
 
Globetrotter Amateur 968.101B Ch= 8.101B ; Nordmende, (ID = 79539) Radio
 
Globetrotter Amateur 968.101B Ch= 8.101B ; Nordmende, (ID = 79540) Radio
Globetrotter Amateur 968.101B Ch= 8.101B ; Nordmende, (ID = 2029005) Radio Globetrotter Amateur 968.101B Ch= 8.101B ; Nordmende, (ID = 2029006) Radio
Globetrotter Amateur 968.101B Ch= 8.101B ; Nordmende, (ID = 2029007) Radio Globetrotter Amateur 968.101B Ch= 8.101B ; Nordmende, (ID = 2029008) Radio
Globetrotter Amateur 968.101B Ch= 8.101B ; Nordmende, (ID = 2029009) Radio Globetrotter Amateur 968.101B Ch= 8.101B ; Nordmende, (ID = 2029010) Radio
Globetrotter Amateur 968.101B Ch= 8.101B ; Nordmende, (ID = 2029011) Radio Globetrotter Amateur 968.101B Ch= 8.101B ; Nordmende, (ID = 2029012) Radio
Globetrotter Amateur 968.101B Ch= 8.101B ; Nordmende, (ID = 742094) Radio Globetrotter Amateur 968.101B Ch= 8.101B ; Nordmende, (ID = 355446) Radio
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Globetrotter Amateur 968.101B Ch= 8.101B ; Nordmende, (ID = 2029005) Radio
Nordmende,: Globetrotter Amateur 968.101B Ch= 8.101B [Radio] ID = 2029005 1400x1020
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For model Globetrotter Amateur 968.101B Ch= 8.101B (Ch= 768.101B), Nordmende, Norddeutsche Mende-Rundfunk GmbH (Sterling), Bremen-Hemelingen:
Das Geräte war bei mir zur Reparatur. Das Bild darf mit Einverständnis des Gerätebesitzers hier auf RMorg veröffentlicht werden.
 
Country:  Germany
Manufacturer / Brand:  Nordmende, Norddeutsche Mende-Rundfunk GmbH (Sterling), Bremen-Hemelingen
Year: 1968–1970 Category: Broadcast Receiver - or past WW2 Tuner
Semiconductors (the count is only for transistors) 18: AF106 AF106 AF106 AF106 AF125 AF125 AF126 AF126 AF126 AF126 AF126 AF137 AC122 BC149 AC163 AD155 AD155 AC117 AA112 AA118 BA111 BA170
Main principle Superhet, double/triple conversion; ZF/IF 2000/460/10700 kHz; 2 AF stage(s)
Tuned circuits 7 AM circuit(s)     10 FM circuit(s)
Wave bands Broadcast, Long Wave, more than 2 x SW plus FM or UHF.
Details
Power type and voltage Line / Batteries (any type) / 110; 220 / 5 × 1,5 Volt
Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) - elliptical
Power out 2 W (unknown quality)
from Radiomuseum.org Model: Globetrotter Amateur 968.101B Ch= 8.101B - Nordmende, Norddeutsche Mende-
Material Leather / canvas / plastic - over other material
Shape Portable set > 8 inch (also usable without mains)
Dimensions (WHD) 310 x 210 x 105 mm / 12.2 x 8.3 x 4.1 inch
Notes

UKW: 87,5 - 104 MHz
MW: 515 -1650 kHz
LW: 145 - 420 kHz
KW: 1500 - 3650 kHz
13-, 16-, 19-, 20-, 25-, 31-, 41-, 49-, 59-, 61-, 80-m-Band

KW-Trommel-Tuner, BFO, SSB-Produktdemodulator; Feldstärkeanzeige mit Instrument.
Betrieb im Auto über Autohalterung 968.180.A aus 6-V- oder 12-V-Autobatterie; Ausgangsleistung bei Autobetrieb 4 W.
Gehäusevarianten: Kaviar, Bordeauxrot, Tabak, Teak 

Net weight (2.2 lb = 1 kg) 4.3 kg / 9 lb 7.5 oz (9.471 lb)
Collectors' prices  
Source of data Handbuch VDRG 1968/1969 / Radiokatalog Band 1, Ernst Erb
Mentioned in Handbuch VDRG 1969/1970
Literature/Schematics (1) -- Original-techn. papers.
Literature/Schematics (2) - - Manufacturers Literature


All listed radios etc. from Nordmende, Norddeutsche Mende-Rundfunk GmbH (Sterling), Bremen-Hemelingen
Here you find 1701 models, 1590 with images and 1219 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.



 


Forum contributions about this model
Nordmende,: Globetrotter Amateur 968.101B Ch= 8.101B
Threads: 1 | Posts: 5
Hits: 1293     Replies: 4
nordmende: Globetrotter Amateur troubleshooting
John Black
11.Jan.15
  1

Hello all!  I have a Globetrotter Amateur with a problem I can't track down. 

Radio works on all bands.  It is not working well on LW, but does seem to work. Alignment may improve that. 

On MW, it works just fine above about 780khz; below that it goes dead.  It is the Local Oscillator that quits.  

I touched a soldering iron to TR8, and it came to life, until the transistor cooled down.  I thought it was bad, but changing it did nothing.  I then found that I could do the same to TR9 and it would work.  I have also found that some resistance added to the base of either transistor makes it work okay, but has consequences on FM.

 

I have checked resistors and bridged capacitors in the oscillator section, checked for cold solder joints, etc, but haven't solved this.  

Anyone have an experience like this?

Thanks,

 

john 

Erwin Scholle
11.Jan.15
  2

Hallo John,

 

long time ago I had a problem like this.

If I remember correct, please check up D249 (St-2,1-07/10S)

 

Greetings

Erwin

John Black
11.Jan.15
  3

Hello, Erwin.  Thank you for the reply; I think you may be correct!

 

I removed the diode and checked it; it does seem that one of the diodes is not conducting.  Trying the radio with the component removed, the oscillator does work all the way to 520khz, but there is much squealing like the BFO is turned on.  

What can I replace this with?  I have tried a couple of silicon diodes, also a couple of germanium diodes, but trying either kills the oscillator altogether.  I feel like I might need some series resistance with the diodes, but thought I'd ask you first. 

The part number (St-2,1-07/10S) doesn't show up for me in a Google search. 

regards,

John 

Erwin Scholle
11.Jan.15
  4

Hello John,

 

I even don’t know how to get the St-2,1-07/10S and replace it.

But any replacement must produce exactly voltage, 2 Volts at all and 1.5 Volts at the upper diode.

The voltage at the St-2,1-07/10S does not allow tolerance.

I think, you can try a little LED may be red or yellow for the upper diode and a Si-diode 40xx or a Ge-Diode or a Schottky-diode for the lower diode.

 

Best wishes

 

Erwin

John Black
12.Jan.15
  5

Hi, Erwin.  Thanks for the info.  Unfortunately, I think I'll have to look elsewhere for the problem. I have been working with this all day and couldn't come up with a combination of diodes and resistors that would work. 

I pulled out an old Globetraveller III I have that works, and did some measuring.  D249 measured the same as the one in my Amateur. I put my old one back in and it is keeping the voltage at 1.5v and 2v respectively, as it should. 

With every step, I think I'm getting closer to the truth about this radio, but it is certainly a vexing problem!  Usually, the Globetravellers I have worked on were a simple fix, showing how well made they were.  

I'll keep looking.  Thanks for your help!

 

John 

 
Nordmende,: Globetrotter Amateur 968.101B Ch= 8.101B
End of forum contributions about this model

  
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