|Timewave DSP-9 and 599zx|
Monday, April 4, 2011
Received the correct TDA-2003 audio IC and some electrolytics for the DSP-9 today and tested it out. Sounds like new with some new filter and coupling caps. Will be great for some of the smaller rigs. I used Digikey # 497-2161-5-ND which is TDA-2003H. The H means horizontal and it is actually vertical mount but this just means you have to bend the leads. I put the leads in the board and bent the whole IC up bending all the leads at once. This is not a big deal. I also changed C38, C28 the large output coupling cap and the power supply filter. Both of these were showing some leakage on the Heath C-3 Cap tester. I also changed the input coupling cap to the IC and a couple of other 10uf in the audio amp circuit and two other 10uf coupling caps. The two large caps tested a bit leaky on the tester the smaller ones seemed to test ok but I changed the obvious audio coupling caps anyway. Sound like new now. I like the 599zx better but the -9 does a very good job for the features that it does have. Service is still available but it would have been $70 for the factory to change the audio IC.