I am trying to repair an Audiosource AMPSUB210 and I can not find either of those transistors in stock anywhere.
Would the Toshiba 2SA1145 and 2SC2705 reliably subsitute in?
Or is there something else?
Would the Toshiba 2SA1145 and 2SC2705 reliably subsitute in?
Or is there something else?
As far as I can tell from the datasheets for the 2SA1024 and 2SA1145, they are a close match. The absolute maximum ratings are almost identical and hfe is close enough. Most importantly, the legs match as well, i.e. 1=E, 2=C, 3=B.
The 2SA1145 has less output capacitance and a higher fT. That should not be a problem, but to be sure you will have to:
(a) run a SPICE simulation [optional]
(b) solder in place and test
The 2SA1145 has less output capacitance and a higher fT. That should not be a problem, but to be sure you will have to:
(a) run a SPICE simulation [optional]
(b) solder in place and test
Thanks for looking into it. One other difference was a slight drop in power disipation, the 1024 was 1W and the 1145 drops to 800mW, also probably not an issue.
While I have the SPICE program, I am not experienced using it to model circuits.
Unless someone knows a good U.S. source for the 1024 & 3206 and is willing to share it or a better sub, I will try the 1145 & 2705 in their place.
While I have the SPICE program, I am not experienced using it to model circuits.
Unless someone knows a good U.S. source for the 1024 & 3206 and is willing to share it or a better sub, I will try the 1145 & 2705 in their place.
Old Thread I know, but I just repaired a Pioneer VSX-51 Home Theater receiver with the 1024/3206 pair in a predriver ckt. I subbed with the 1145/2705 and the unit powered up and runs audio just fine. Just thought I would pass along the info, sourcing the 1024/3206's in the US is a huge pain in the butt.
- Status
- Not open for further replies.