--- In [email protected], "Tony Parks" <[EMAIL PROTECTED]> wrote: > > Hi Jim, > > Do you have a measurement of the current from the 13.8 volts power supply when the v8.0 (?) is running on various bands? Also do you have a temperature measurement on the 5 volt regulator? > > I think the typical current is around 100 mA for about 0.8 watts of heat in the 5 volt TO220 case regulator. > > 73, > Tony KB9YIG > ----- Original Message ----- > From: James R. Elledge > To: [email protected] > Sent: Wednesday, May 07, 2008 10:59 AM > Subject: [softrock40] SR LITE V8.x SUGGESTION > > > The 7805 VR gets a bit warm when using a 12V or 13.8V power supply, > another VR (9V perhaps) between the 12/13.8V PS would help. This > technique has been used successfully by others (and myself) to help > with the heat problem when using standard 12/13.8 PS's. > > Jim - KB2XJ > Hi Tony
I do not have a temp probe for accurate measurements (use my finger). The VR is not exactly HOT but a bit warm to me. A small HS may fit under the reg to keep me from getting excited. The Si chip also a bit warm after a few minutes of op. I can get an accurate current reading, 98.54 mA at 12.0V (default freq). Only checked output at the default freq, its ok. Need to locate the sw's settings vs output freq , will look in files to locate. I will make a chart for freq vs current when I can (dog sitting/house sitting for the next four or five days-sister out of town). Jim - KB2XJ
