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Albrecht AE2990 AFS, Service Manual

The Albrecht AE2990 AFS is a versatile and reliable CB radio that offers exceptional performance. For easy troubleshooting and maintenance, be sure to download the free Service Manual from our website. This comprehensive manual provides concise instructions and diagrams to keep your radio operating at its best.

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17 

 

 
 

       AE2990 AFS 

CB Handheld Radio for AM, FM and SSB 

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 
 
 
 
 
 
 

 

 
 

Service

 Manual

Downloaded from www.cbradio.nl

Summary of Contents for AE2990 AFS

Page 1: ...17 AE2990 AFS CB Handheld Radio for AM FM and SSB Service Manual Downloaded from www cbradio nl ...

Page 2: ...nach längerer Betriebszeit des Geräts Ursache Der Lastwechsel der ansteigenden Sendeleistung bei SSB beim ersten Sprechen bewirkt eine unerwünschte HF Rückwirkung auf den VCO Die Phasenregelschleife erkennt das als Frequenzablage und regelt nach Das Regelverhalten reagiert dabei kurzzeitig wie ein Überschwingen Abhilfe 1 Änderung eines Standard SMD Elkos von 2 2µF in einen Tantal Elko 1 µF gelb in...

Page 3: ...e frequency shift reaction of the VCO The PLL and phase comparator circuits then try to compensate the VCO Varicap voltage Solution 1 Change the original SMD standard capacitor 2 2 µF into a Tantalum capacitor of 1µF capacity yellow on above photo 2 Additionally the effect can be further reduced by adding an additional resistor 10 kOhm parallel to the PCB plug contacts of the third row seen from b...

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