<html><body><div style="color:#000; background-color:#fff; font-family:verdana, helvetica, sans-serif;font-size:10pt"><div style="RIGHT: auto"><SPAN style="RIGHT: auto">Thanks for the reply<VAR id=yui-ie-cursor></VAR> Tom. My 3RP1 specimen has 12 pins, while the 3RP1A has only 10. Any yes, flat face on the "A" version versus the curved on the 3RP1. <BR style="RIGHT: auto" class=yui-cursor></SPAN></div>
<DIV></DIV>
<DIV> </DIV>
<div>Mike<BR>K5MLC<BR>
<BLOCKQUOTE style="BORDER-LEFT: rgb(16,16,255) 2px solid; MARGIN-TOP: 5px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px">
<DIV style="FONT-FAMILY: verdana, helvetica, sans-serif; FONT-SIZE: 10pt">
<DIV style="FONT-FAMILY: times new roman, new york, times, serif; FONT-SIZE: 12pt">
<DIV dir=ltr><FONT size=2 face=Arial>
<DIV style="BORDER-BOTTOM: #ccc 1px solid; BORDER-LEFT: #ccc 1px solid; PADDING-BOTTOM: 0px; LINE-HEIGHT: 0; MARGIN: 5px 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; HEIGHT: 0px; FONT-SIZE: 0px; BORDER-TOP: #ccc 1px solid; BORDER-RIGHT: #ccc 1px solid; PADDING-TOP: 0px" class=hr contentEditable=false readonly="true"></DIV><B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B> Tom Chesek <tchesek@epix.net><BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> K5MLC (Mike) <k5mlc@sbcglobal.net>; Heath@puck.nether.net <BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Sunday, February 12, 2012 3:19 PM<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> Re: [Heath] 3RP1/3RP1A tube question<BR></FONT></DIV><BR>
<DIV id=yiv244543018>
<DIV dir=ltr>
<DIV dir=ltr>
<DIV style="FONT-FAMILY: 'Calibri'; COLOR: #000000; FONT-SIZE: 12pt">
<DIV>In the past I’ve heard that the only difference is the A version has a flat face. Here is a link to a page from and RCA manual for those tube types.</DIV>
<DIV>http://www.sphere.bc.ca/test/tube-data/rca-crt3-5.jpg</DIV>
<DIV> </DIV>
<DIV>Tom</DIV>
<DIV>K3TVC</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY: 'Calibri'; COLOR: #000000; FONT-SIZE: small; FONT-WEIGHT: normal; TEXT-DECORATION: none">
<DIV style="FONT: 10pt tahoma">
<DIV> </DIV>
<DIV style="BACKGROUND: #f5f5f5">
<DIV><B>From:</B> <A title=k5mlc@sbcglobal.net href="mailto:k5mlc@sbcglobal.net" rel=nofollow target=_blank ymailto="mailto:k5mlc@sbcglobal.net">K5MLC (Mike)</A> </DIV>
<DIV><B>Sent:</B> Sunday, February 12, 2012 2:47 PM</DIV>
<DIV><B>To:</B> <A title=Heath@puck.nether.net href="mailto:Heath@puck.nether.net" rel=nofollow target=_blank ymailto="mailto:Heath@puck.nether.net">Heath@puck.nether.net</A> </DIV>
<DIV><B>Subject:</B> [Heath] 3RP1/3RP1A tube question</DIV></DIV></DIV>
<DIV> </DIV></DIV>
<DIV style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY: 'Calibri'; COLOR: #000000; FONT-SIZE: small; FONT-WEIGHT: normal; TEXT-DECORATION: none">
<DIV style="BACKGROUND-COLOR: #fff; FONT-FAMILY: verdana, helvetica, sans-serif; COLOR: #000; FONT-SIZE: 10pt">
<DIV><SPAN>Hello everyone,</SPAN></DIV>
<DIV><SPAN></SPAN> </DIV>
<DIV><SPAN>The question: will a 3RP1A replace a 3RP1 in a HO10 monitor scope? The "A" version has 2 less pins than the standard 3RP1. Meanwhile, they are being advertised "bayside" as being interchangeable. It appears that the 3RP1A will plug into the tube socket just fine, but there are wires attached to the sockets where the pins on the "A" version are missing. Thought I'd ask before I smoke it. Thanks is advance for sharing your greater knowledge and experience. 73<VAR id=yiv244543018yui-ie-cursor></VAR></SPAN></DIV>
<DIV></DIV>
<DIV> </DIV>
<DIV>Mike<BR>K5MLC</DIV></DIV>
<DIV style="BORDER-BOTTOM: #ccc 1px solid; BORDER-LEFT: #ccc 1px solid; PADDING-BOTTOM: 0px; LINE-HEIGHT: 0; MARGIN: 5px 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; HEIGHT: 0px; FONT-SIZE: 0px; BORDER-TOP: #ccc 1px solid; BORDER-RIGHT: #ccc 1px solid; PADDING-TOP: 0px" class=hr contentEditable=false readonly="true"></DIV>_______________________________________________<BR>Heath mailing list<BR>Heath@puck.nether.net<BR>https://puck.nether.net/mailman/listinfo/heath<BR>
<DIV style="BORDER-BOTTOM: #ccc 1px solid; BORDER-LEFT: #ccc 1px solid; PADDING-BOTTOM: 0px; LINE-HEIGHT: 0; MARGIN: 5px 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; HEIGHT: 0px; FONT-SIZE: 0px; BORDER-TOP: #ccc 1px solid; BORDER-RIGHT: #ccc 1px solid; PADDING-TOP: 0px" class=hr contentEditable=false readonly="true"></DIV><A rel=nofollow></A>
<div class=yiv244543018avgcert align=left>No virus found in this message.<BR>Checked by AVG - <A href="http://www.avg.com/" rel=nofollow target=_blank>www.avg.com</A><BR>Version: 10.0.1424 / Virus Database: 2112/4805 - Release Date: 02/12/12</div></DIV></DIV></DIV></DIV></DIV><BR><BR></DIV></DIV></BLOCKQUOTE></div></div></body></html>