From yahoo Sent Fri, Feb 22nd 2019, 09:56
From yahoo Sent Fri, Feb 22nd 2019, 09:56
So the A-126 seems to be very old as we use sockets for integrated circuits since nearly 20 years because it simplifies the service in case of a faulty integrated circuit clearly. Let's hope that the mentioned interruption is the only problem (apart from re-adjustment). The planned new frequency shifter module will be equipped with a squelch circuit (combination of envelope follower and VCA) that can be used to avoid the bleeding of the multipliers. But with optimal adjustment the bleed of the old A-126 should be better than about -50dB. So far the new FS is still in the development state and I have no release date available. It's a very special module which I do mainly for myself and I don't expect large sales. Best wishes Dieter Doepfer > -----Ursprüngliche Nachricht----- > Von: xxxxxxx_xxxx@xxxxxxxxxxx.xxx [mailto:xxxxxxx_xxxx@xxxxxxxxxxx.xxx] > Gesendet: Freitag, 22. Februar 2019 01:44 > An: xxxxxxx_xxxx@xxxxxxxxxxx.xxx > Betreff: [Doepfer_a100] Re: A-126 Malfunction > > > Forgot to say that I do not have an oscilloscope to measure the circuit. > I do not hope the CEM3382 is broken, for it is hard to find. > > And if the correct adjustment is very important, I will try to do > that first. The adjustment I ever have made, is to reduce the > sine bleeding with four of those trimmers. Maybe I did something > wrong then. > > But today I scratched with a wooden stick all over the solder > part, while the module was playing and discover a loose solder > part. It was pin 7 from IC2/TL064 close to the Audio Input. That > pin is connected with R15. > Fixing the connection only result in a louder sound. > > Since my A126 has mostly ic's without a socket, it will take much > time to replace them. But it is worthwhile. And I think it is > always good to replace old components, for they say that they do > not perform optimal anymore. > On the other hand, I always hated the bleeding sine of this > module. If the upcoming new Freq Shifter has no bleeding I'll > have one. Because a FS is special, it is very funny. ------------------------------------ ------------------------------------ ------------------------------------ Yahoo Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Doepfer_a100/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Doepfer_a100/join (Yahoo! ID required) <*> To change settings via email: xxxxxxx_xxxx-xxxxxx@xxxxxxxxxxx.xxx xxxxxxx_xxxx-xxxxxxxxxxxx@xxxxxxxxxxx.xxx <*> To unsubscribe from this group, send an email to: xxxxxxx_xxxx-xxxxxxxxxxx@xxxxxxxxxxx.xxx <*> Your use of Yahoo Groups is subject to: https://info.yahoo.com/legal/us/yahoo/utos/terms/