Interesting. I've seen 2 different schematics for an R-4B, one with V11 and one without V11 (OB2). Neither indicate serial number ranges.
Ian N8IK -----Original Message----- From: Tim Kass [mailto:[EMAIL PROTECTED] Sent: Sunday, April 04, 2004 5:38 PM To: [EMAIL PROTECTED]; [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: Re: [drakelist] R-4B question My R4B does NOT have the OB2, Drake removed that in the later R4A series, early R4A had the OB2 and 6GX6 product detector, but the 11 tube version of the R4A did away with it...73 Tim K8WBL >From: <[EMAIL PROTECTED]> >To: "Ian" <[EMAIL PROTECTED]>, <[EMAIL PROTECTED]> >Subject: Re: [drakelist] R-4B question >Date: Sun, 4 Apr 2004 15:46:51 -0400 > >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/ > ---------------------------------------------------------------------- > > No trees were killed in the sending of this message. However, a large number of electrons were terribly inconvenienced. _________________________________________________________________ Free up your inbox with MSN Hotmail Extra Storage! Multiple plans available. http://join.msn.com/?pgmarket=en-us&page=hotmail/es2&ST=1/go/onm00200362ave/ direct/01/ ---------------------------------------------------------------------- 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/ ----------------------------------------------------------------------
