Citation 11 speaker switch question

Good day folks.
I have Citation 11 speaker switch (controller) question.

I recently purchased a Citation 12 & 13 for my son. While I was playing around prior to sending it off to a tech for cleaning and testing I found that the speaker selector on the pre-amp will not isolate the signal to the amp.
I set my patch cords from PREAMP OUTPUT 1.
As an example, switch the selector to headphones, speakers still produce the sound, place the selector on system 1 speakers work, switch select to speaker 2 and the speakers still work. There was zero difference, not even a cut out while I was switching them over.
Then I set the Citation pre-amp to selection PREAMP OUTPUT 2 and repeated the test, everything worked again without any disruption.

My tech did not see anything wrong with it and noted that that's they way they did things back then (around 1972-ish). I beg to differ and that's why I am here. I attached the op's manual to this discussion. On page 12/ 17 it speaks about the speaker switch and isolating the speakers and phones.
In short, am I looking for a new tech?
thanks in advance
Byron
 

Attachments

Did you check the connections?

Screenshot 2022-08-16 at 18-35-12 ManualsLib - Makes it easy to find manuals online! - citatio...png

Screenshot 2022-08-16 at 18-32-53 ManualsLib - Makes it easy to find manuals online! - citatio...png
 
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The speaker switch in the Citation 11 serve two purposes:
1. To select 2 sets of speakers - speaker1, speaker 2 or speaker1+2.
2. To mute the speakers while headphone is selected.
If you want to use the above function on the front panel of the Citation 11, you need to connect the power amp outputs as the manual stated.
 
I set the Citation pre-amp to selection PREAMP OUTPUT 2 and
I don't see a settable selection for preamp output 1 or 2. In fact they are the SAME signal on two jacks, no switching.
Cit11-switching.gif

There is a selection for speaker 1, 2, or 1+2, or headphones; but this requires the loopback from power amp to control unit (it is not just a preamp).

BTW this preamp might not drive headphones well; note 5k6 loads and 10uFd couplers on Q505 Q509. It was assumed you would tap headphones from your speaker-amp via 330r resistors. That's how we did it then.
 
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I don't see a settable selection for preamp output 1 or 2. In fact they are the SAME signal on two jacks, no switching.
View attachment 1081849

There is a selection for speaker 1, 2, or 1+2, or headphones; but this requires the loopback from power amp to control unit (it is not just a preamp).

BTW this preamp might not drive headphones well; note 5k6 loads and 10uFd couplers on Q505 Q509. It was assumed you would tap headphones from your speaker-amp via 330r resistors. That's how we did it then.
Interesting. Thank you very much Chris. I may have to reconsider this unit for my son. I was under the impression that I could connect 2 separate amps and drive two sets of speakers and isolate them as required.
Bugger.... Really like the Citation Amps!