My Sound Technology 1710A Audio Measurement System unit has developed a vacillating distortion which apparently is in the master oscillator.
The unit specification for generator output THD is below 0.04% … very clean. Just recently it has jumper up to around 0.15%.
Has anyone seen this problem ??
This unit uses a notable number of 2605 op amp ICs which appear to be super 741s in a TO-22 8 pin can with the can coming to pin 8 for grounding purposes. Any information on this unique IC would be appreciated.
Thank you.
The unit specification for generator output THD is below 0.04% … very clean. Just recently it has jumper up to around 0.15%.
Has anyone seen this problem ??
This unit uses a notable number of 2605 op amp ICs which appear to be super 741s in a TO-22 8 pin can with the can coming to pin 8 for grounding purposes. Any information on this unique IC would be appreciated.
Thank you.
Thank you so much for the lead ... this IC, at least from the data sheet pin-out, looks about like the device that's in there.
I own a 1700B, which should be quite similar.
I have had a number of problems along the years, here they are in as much as I can recall them:
-Faulty 723 in the supply section; unrelated to your problem
-Bad contacts in the connectors, the flying leads going to TP's on the boards; possible culprit
-Faulty optocoupler; idem
-Noisy and out of tolerance carb comp resistor; idem
I have had a number of problems along the years, here they are in as much as I can recall them:
-Faulty 723 in the supply section; unrelated to your problem
-Bad contacts in the connectors, the flying leads going to TP's on the boards; possible culprit
-Faulty optocoupler; idem
-Noisy and out of tolerance carb comp resistor; idem
- Status
- Not open for further replies.