Based upon 30+ years of experience with L4, L4B, L7 amps, wired for 110v and 220v, in multiple locations, I would bet a Starbuck's coffee that the problem with that great of a voltage sag is due to one or more electrolytic capacitors failing. For the secondary to sag by 40-50% due to a primary (line voltage) sag, that means the line voltage would go down to 55-60 VAC. So, any bets?
73,
Evan
-----Original Message-----
From: [EMAIL PROTECTED]
To: Neil Kutchera <[EMAIL PROTECTED]>; [email protected]
Sent: Mon, 27 Mar 2006 15:44:37 -0600
Subject: RE: [drakelist] L7 Voltage Sag
"" <[EMAIL PROTECTED]> made an utterance to the drakelist gang ---------------------------------------------------------------------- It probably means you have #14 house wiring! Lee w0vt > [Original Message] > From: Neil Kutchera <[EMAIL PROTECTED]> > To: <[email protected]> > Date: 03/27/2006 12:26:21 PM > Subject: [drakelist] L7 Voltage Sag > > > Neil Kutchera <[EMAIL PROTECTED]> made an utterance to the drakelist gang > ---------------------------------------------------------------------- > I'm working on repairing my Drake L7 amplifier before I put it up for > sale. It is set for 110 volts. When I turn on the amp the plate > voltage reads either 2600 in SSB or 1850 in CW. Under load the it > drops to 1000 volts regardless of the mode. The amp will run between > 500 - 600 watts output with 120 watts of drive at this voltage. I've > tested this with two sets of tubes. Does this indicate the power > supply caps are in need of replacement? If so can anyone recommend a > good source of parts? > > Thanks, > Neil > K4NJK > > ---------------------------------------------------------------------- > 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 ----------------------------------------------------------------------
