Beresford Bushmaster DAC

[StanleyB]

I think that the Beresford DAC was the very first of my now infamous "Jerry Hype Forum Fad" threads to appear on the Wigwam. Boy, did that cause a stir!

Those were the days. I remember them well .

I intended to put a simple variable volume control on the Bushmaster, but I soon realized that a simple volume control circuit was out of the question. So that is still under development. Even fitting a volume control to the headphone circuit was not an easy job. The main reason is the DC offset of 1mV. Variable resistors don't like DC. So I am having to use a volume control method that reduces the volume towards infinity, instead of shorting out the signal towards ground. Part of the reason that I use such an arrangement as well is that the headphone output dynamic range is not affected by low volume control settings. This is not always the case with most headphone designs, which then makes the sound so lifeless on lower volume settings in many headamps. I would of course like to use the same principle on the variable output.