dc300

[flodge]

Hi I have just completed a couple of panels and i am rather baffled by the way they behave with my amps. When tested with a gainclone just to see if alls well they went quite loud and sounded great with a crossover disposing of the bass. Then they were connected to a crown dc300a with a 10 ohm 100 watt resistor to soften the load. Much less volume than the gainclone, sounds bad. swapped back next day and the sensitivity seems to have gone down and distortion levels up. I am using 3.8 micron film that has been heatshrunk. The construction is taken from sheldon stokes excellent site. obviously the gainclone should struggle and the crown have ample power. There has been no arcing. ANY IDEAS PLEASE
THANKS IN ADVANCE
STEVE

 

[flodge]

I thought thst I would take this opportunity to answer my own question. I was just being stupid. not the first time either. My bias supply was faulty and not putting out a decent voltage. I figured it was safer to imagine it was working rather than the perhaps more dangerous path of testing the output. To a large extent I still agree with myself on this point in that the means of testing bias seem to be the best way to come into contact with the results of a working device.
However, all is now well and I borrowed a lab supply which proved that all of my scrapped designs would have probably worked quite well if they had been connected to any electricity. The gainclone obviously did not mind the load in some obscure manner, probably beacuse it is a chip. By the way I have found that plastic flooring planks of the flexible scandinavian type are easy to cut accurately, dimensionaly extremely stable, have tight tolerances and take glue very well indeed. dirt cheap. And work as stator material.
Regards
Steve