RE: [drakelist] R-4B question

[Gerry]

I seem to remember there were 2 versions of the R-4B or is it the R-4A I’m thinking about?. The R-4B (sn#9182G) I have is a 10 tube job and doesn’t have the voltage regulator tube. The only voltage regulation in the receiver is at the PTO. Unregulated 150 volts is fed through a 6k/5w resistor to a 1N714 zener in the PTO enclosure.   -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Sunday, April 04, 2004 3:47 PM To: Ian; [EMAIL PROTECTED] Subject: Re: [drakelist] R-4B question   Ian:   The R-4B still has the OB2 regulator.  The R-4C uses a solid state regulator, in keeping with Drake's transition from tubes to solid state devices. You will note the significant reduction of the number of tubes in the C series.   Removing tubes in the design reduced energy needed, cut down on heating problems, and increased reliability. Cheers,   Al Link, K4ICL [EMAIL PROTECTED] 139 Turner Circle Greenville, SC 29609 864 420-4652 www.K4ICL.com   www.UREGS.org for Equipment Condition Rating Standards ----- Original Message ----- From: Ian To: [EMAIL PROTECTED] Sent: Sunday, April 04, 2004 11:09 AM Subject: [drakelist] R-4B question   I'm a Drake newbie but thinking about getting an R-4B to relive my childhood.  When was V11, the OB2 voltage regulator, introduced (or removed)?  I think the R-4A has it but the R-4C doesn't.  If it was removed as the series progressed, why? Also why is there no V6 in the schematic? 73 de Ian N8IK ---------------------------------------------------------------------- Submissions:        [EMAIL PROTECTED] Subscribe:          [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe:        [EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:    [EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net  http://www.tlchost.net/ ----------------------------------------------------------------------