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
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