"W7RY" <[EMAIL PROTECTED]> made an utterance to the drakelist gang ---------------------------------------------------------------------- The measuring point is not in the bias line.
It is actually in the plate supply line. You cannot measure plate current, (idling current is adjusted by the bias level. Not measured there) while in series with the bias line. 73 Jim W7RY -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Garey Barrell Sent: Wednesday, January 04, 2006 8:54 AM To: drakelist Subject: Re: [drakelist] AC3 vs AC4 ? Garey Barrell <[EMAIL PROTECTED]> made an utterance to the drakelist gang ---------------------------------------------------------------------- Ron - Absolutely. I don't think I ever used the jumper method once the power supply was installed in the speaker cabinet though... :-) Yeah, I think we've "slightly" exceeded the original 25 word limit........ 73, Garey - K4OAH Atlanta Drake C-Line Service Manual <http://www.k4oah.com> Ron Wagner wrote: > One big difference is that the AC3 has a set of resistors in the bias > line. Those resistors are jumper shorted out normally with a small > screw. Lifting the jumper short allows you to easily measure the idle > current (actually voltage across known resistance). Much easier then > trying to look at the fat needle against fat marking. > > You can measure the current on the resistor under the chassis too, and > should to make sure the finals are balanced. But to set the current > easily the AC3 was a gem. IMHO. > > Okay, something of a thesis. :-) > > 73, > Ron > > ============================================================ > Visit my astronomy home page. http://www.dma.org/~wagner > Amateur Radio Station: WD8SBB - Ron and KB8NRP - Joann > ============================================================ > > On Tue, 3 Jan 2006, Garey Barrell wrote: > >> >> Garey Barrell <[EMAIL PROTECTED]> made an utterance to the >> drakelist gang >> ---------------------------------------------------------------------- >> Functionally identical. Electrically "almost" identical. Only real >> difference is the age of the components. >> >> 14 words, not counting the sig! >> >> 73, Garey - K4OAH >> Atlanta >> >> Drake C-Line Service Manual >> <http://www.k4oah.com> >> >> >> >> chuck grandgent wrote: >> >>> chuck grandgent <[EMAIL PROTECTED]> made an utterance to the >>> drakelist gang >>> ---------------------------------------------------------------------- >>> OK, simple question. >>> In 25 words or less, what's the diff between AC3 and AC4 ? >>> I've seen schematics, is the AC4 just a slightly more progressive >>> design ? >>> >>> Thanx, >>> Chuck, K1OM >>> >>> >> ---------------------------------------------------------------------- >> Submissions: [email protected] >> Unsubscribe: [EMAIL PROTECTED] - unsubscribe >> drakelist in body >> Hopelessly Lost: [EMAIL PROTECTED] - help in body of message >> Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net >> ---------------------------------------------------------------------- >> > ---------------------------------------------------------------------- Submissions: [email protected] Unsubscribe: [EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost: [EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net ---------------------------------------------------------------------- ---------------------------------------------------------------------- Submissions: [email protected] Unsubscribe: [EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost: [EMAIL PROTECTED] - help in body of message Zerobeat Web Page: www.zerobeat.net - sponsored by www.tlchost.net ----------------------------------------------------------------------
