ANNR Dual 7. Maximum ratings Characteristics Positive supply voltage Negative supply voltage 2 Supply. DS : -. KE : Encased Hybrid Amp. This format makes the KE Series amplifiers an excellent choice for use on the bench, in a test station, or in other environments needing both high performance and ease of use.
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Location: Slovenia Hi there! Done some additional tests. All transistors minus power Q were checked on curve tracer, all look OK. Chanel was reasembled, but insted of power transistors, only diode was put in to mimic base-emitor junction. Because the DC servo is fed only from the last transistor pair, it is useles to make eny conclusions based on a open feedbak loop, as I did at the beginig..
In this configuration, AN must be able to do a small amount of DC ofset corrections. For proper operation, the load must higher impedance , R should also be higher, or the drivers could toast.
I have tested that on a working chanel, luckly without damage.. Nope, there is only a kind of a ripple in tens of mV, superimposed on a heavily LPF filtered and somehow delayed bass, on both chanels! The signal entering AN pins 2,17 is OK on both chanels, output pins 8,10 should carry signal but there is that ripple, and on colector of Q the signal reapears, clean and sound on working chanel. On damaged chanel, on colector of q, the signal is heavilly distorted, only short bursts of music come through, usualy when bass kicks in.
AN7062 Panasonic, AN7062 Datasheet