In general the modifications documented on the several web pages are sufficient. However, improving the power supply bypassing and decoupling noise sources will also help the noise floor. The big problem that none of the modifications address is the need to run the Windows (digital) output at 100% in order for the VOX to trigger properly. Unfortunately, the PCM29xx series USB CODEC gets a little dirty at max output and with the unstable reference to the op amps, the transmit distortion is only compounded *before* the TX level control. 73, ... Joe, W4TV On 2015-07-04 2:54 PM, P.J.Hicks wrote:
Joe, W4TV, You mentioned getting better performance out of a SLUSB by doing some modifications. I am wondering if you did anything different than is called out in the several web pages on Modifying the Signal Link USB? PJH, N7PXY ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
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