Thanks again Dave and Alan, I've spent a few more hours on the F/S meter today and still have not found the problem. I can blow with a drinking straw on any component and there's very little output c
LF, I've just rebuilt PA0SE's field strength meter (LF Experimenters' Handbook), modified for use on the 500 kHz band. I've followed the published circuit as near as possible considering available co
Chris Have you tried a can of "freezer" spray to identify where the problem lies? Is it the ferrite aerial or is it the FET amplifier? If you have enough gain then a little negative feedback on the F
Chris Its not the battery is it ... assume the supply voltage / regulated voltage is holding constant ? G .. From: [email protected] Chris Osborn Sent: Monday, May 04, 2009 9:23 PM To: rsgb_lf_group
Chris Its not the battery is it ... assume the supply voltage / regulated voltage is holding constant ? G .. From: [email protected] Chris Osborn Sent: Monday, May 04, 2009 9:23 PM To: rsgb_lf_group@
Ok Chris, Is this the cct ? http://wireless.org.uk/fig2.jpg I can only think that something in the tuned cct is a little heat sensitive ? , how high is the 'q' the back to back diodes could be temper
