Beomaster 6000 (type 2702) SQ-module, there are different models?

[joupar]

Hello there,

I have a Beomaster 6000 4-channer reciever. Restored it quite deeply I might say, making even the boards #07 Level amplifier, #10 Tone amplifier and #16 SQ Decoder altogether new, including PCBs. Though changing all the components to new ones, not only the capacitors

Because had occasionally weird cracling noices on one channnel and low level on the other. Did not want to bother to seek and find that fault. Quessed it would be a transistor or resistor somewhere which behaves oddly when the temeprature rises. Also the pertinax PCBs of these three were a bit warped, maybe causing those problems also…

And by doing these reproduction boards preventing the same fault on an another channel. In the nearest future perhaps, just after having this fault repaired. And there are four different channels creating possible problems…

But, I noticed it says on a sticker on the with screws detachable bottom cover plate, under which the SQ-module is installed, that ’4-2–4 SQ matrix decoder fitted. Type: BASIC’

The question arises, on the days way back then, what kind of other SQ modules were available to be chosen fo this Beomaster?

Is there anyone on the lines who knows? And if there is, please, help me find some information of those SQ modules so that I can reproduce also these variations. Would like to hear how they sounded…

BR Jouni

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