Author Topic: BK Precision 1803D Frequency Counter prescaler  (Read 377 times)

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Offline rfenggTopic starter

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BK Precision 1803D Frequency Counter prescaler
« on: November 12, 2024, 03:21:19 pm »
Hi All,

I have a BK Precision 1803D Frequency Counter which has 2 inputs,  HF (10Hz to 20MHz) and VHF (10MHz to 200MHz) .

It looks like the prescaler for the VHF band which is a chip marked as UPB-467 has failed with no output.....for the life of me, I can't seem to get any info on this chip on the web.  :-//

Does anyone have more info on this chip? Or is there anyway to determine what the prescaling factor could be as then I could find another chip to do the same?
 

Offline factory

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Re: BK Precision 1803D Frequency Counter prescaler
« Reply #1 on: November 12, 2024, 04:03:54 pm »
This might be quite recent, datasheet & manual are dated 2014, the BK website states this model was discontinued in Jan 2023.

David
 
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Offline George Edmonds

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Re: BK Precision 1803D Frequency Counter prescaler
« Reply #2 on: November 12, 2024, 05:12:41 pm »
Look at Plessey SP8695A.

G Edmonds
 
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Online coromonadalix

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Offline timeandfrequency

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Re: BK Precision 1803D Frequency Counter prescaler
« Reply #4 on: November 12, 2024, 07:48:36 pm »
Hello rfengg,

It seems that there's a second source from Fujitsu : MB467.
Check the pinout to confirm equivalence (please report).
Ask for quote here.

If too difficult to procure, try to cobble something with an MC12080
« Last Edit: November 13, 2024, 03:13:10 am by timeandfrequency »
 
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Offline rfenggTopic starter

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Re: BK Precision 1803D Frequency Counter prescaler
« Reply #5 on: November 13, 2024, 03:20:50 pm »
Thank you all for your replies.....

@timeandfrequency : You have nailed it partner......the MB467 seems like an exact replacement for the  UPB-467.
I traced the UPB-467 nodes on the BK Precision 1803D and compared it to the datasheet of the MB467 and it seems to be like a 1:1 match.
Kudos man....keep up the good work......now I only need to worry about trying to get hold of one  :phew:
 
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