Seeking Bruel & Kjaer 2606, 2609 service manuals

[BKnut]

I'm looking for service manuals or circuit diagrams to fault find 3 x 2606 & 3 x 2609 measuring amplifiers. They look new for their condition.



Noticed one 2609 has mini tubes? and the other two are solid state built.



Managed to get one 2609 working using Deoxit D5 lube spray on the push buttons. I'm thinking the second 2609 unit has a dud LM723CH (a round chip!) when compared to the working unit.


Yet to look at 2606 inside and they need repairs too.


Cheers,
1 Pascal=94dB

 

[1audio]

I don't believe any version of the 2609 has tubes. They do have opamps in cans.

PM me for what I have on the 2609. I have 2. I also worked out some changes to get the internal noise down. I also have service manual for the 2606.

 

[BKnut]

Thanks 1audio for your reply,

Here's a picture of the tubes and they glow. Just googled part Philips ZZ1000 and they are two wire 81V regulators. Something new I learned today.

 

[1audio]

You can upload pictures from your PC. Go advanced=> Paper clip (attachments). I would like to see that variation. The B&K manuals are not like Tek and HP with backdating info and change info.

PM me your e-mail and I'll send the stuff I have.