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In Reply to: RE: "Most power amps have a cap at the input." ... posted by andyr on March 31, 2014 at 23:36:38
andyr,
Are you bulding the new crossovers on PBCs or on prototype breadbords?
Follow Ups:
There is no PCB for these active XO circuits - so I will use my (patented!! :-)) ) construction method! :-)) This is to use a 3mm thick sheet of teflon to hold the components in place ... and do point-to-point wiring on the underneath. Teflon is easily drilled with a miniature hand-drill and withstands the heat from a soldering iron. Also, I suggest it degrades the signal much less than breadboard.
Regards,
Andy
Aha, but without a layer of copper it is difficult to have the components stay in place. Sure, I would like to see pictures when you are finished!
Here is a pic of the JFET-based phono stage that I make:
Yes, this does have a copper ground plane on the under-side ... but other components that I have used this method for - like PSes - have not ... and nothing untoward has happened.
Regards,
Andy
Andy,
What are these large film caps? Are they part of the frequency setting or supply bypass?
That is an early picture - v2 of the 'Muse'. The circuit is currently at v4, so I am using different caps now.
Regards,
Andy
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