[R-390] Filter testing

quartz55 quartz55 at hughes.net
Fri Feb 22 22:33:15 EST 2013


Bob,
Yes, and the function gen only goes to about 120K anyhow.  However, the R2005 service monitor I have does put out at least 4VP-P (it really only reads to 1V rms or 3.3VP-P out but cranks up a bit past that), so that may be good enough to work with. I'll just have to put a 100K resistor in series.  Plus it tunes in 10 Hz increments and is High Stab, so it's pretty accurate.   I'll give it a try tomorrow.  If I can get anywhere around .24VP-P out, the filter should be good, but I don't think it will be, because the resistance from the windings to ground is somewhere around 25Meg, much less than any of the others I have.  The foam has probably turned to sticky puckity and hopfully that will be an easy fix.

N3DT


More information about the R-390 mailing list