[Test-Equipment] Bruel and Kjaer Voltmeter 2006

[K9FFK]

Try this site, Paul.

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https://www.manualslib.com/manual/1981140/Bruel-And-Kjaer-2006.html?page=5#manual 
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Dick, K9FFK

On 2/7/2021 4:21 AM, Paul Galpin wrote:
> Hi!
>
>   
>
> Can anyone help me with info on this device, the Bruel and Kjaer RF Voltmeter 2006?
>
> I need the circuit, and the service manual, if such a one exists. I have the block
> diagram, and the Users book.
>
>   
>
> Mine works well, but some problems remain, in that the calibrating oscillator output
> is far too high, about 6mV rms instead of 2.5, and I want to build a probe, which is
> missing. This is only described as a "cathode follower". Is it the same as in the
> 2002, an all-valve previous version? The Probe power output certainly provides about
> 60v(HT?) and 6v(LT?) and the Users manual definitely gives the machine half the
> running life when working from the built-in NiCads, and using the probe. The 2002 used
> an ECC91, but the 2006 might have used a different valve.
>
>   
>
> The book also says that connection to the 75 Ohm input must always be done with the
> special cable supplied (but also missing), and gives no reason why or what it does.
> Pictures show it as a standard short coax with BNCs at the ends. I found the input to
> be 86R so I have paralleled a resistor on the back of the input to bring it down to
> 75R until I understand more about it.
>
>   
>
> Any new information will be gratefully received.
>
>   
>
> TIA
>
>   
>
> Paul Galpin
>
> ZS2PG
>
>   
>
>   
>
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