The Electronics Universe

Test Equipment => Signal Generators => Topic started by: The Radio Shop on July 01, 2013, 10:14:04 AM

Title: B&K 2040 thread
Post by: The Radio Shop on July 01, 2013, 10:14:04 AM

I picked up another B&K 2040 a whilke back I need to get going.
Last time I tested this unit it produced a wide signal on the output and no matter where you set the channel display out it was the same.  However the 455kc section operates as designed.

Someone added a multi 6 position switch to take this unit out of the normal band.  Most likely it has a VCO problem as the 2 10.240 oscilators are working.
I will be poosting my findings in this thread and have attached the service manual.

Title: Re: B&K 2040 thread
Post by: hackindave on August 01, 2013, 06:17:56 PM

Any updates on this?

Title: Re: B&K 2040 thread
Post by: The Radio Shop on August 03, 2013, 06:39:44 AM

I think the varactor diode is tost. At least  it is not changing the voltage to the VCO. Have to rob one from a cobra 29 and try

Title: Re: B&K 2040 thread
Post by: hackindave on August 06, 2013, 07:55:50 PM

Keep me updated.. You know I am looking for one...