<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META content="text/html; charset=US-ASCII" http-equiv=Content-Type>
<META name=GENERATOR content="MSHTML 11.00.9600.18231"></HEAD>
<BODY id=role_body style="FONT-SIZE: 10pt; FONT-FAMILY: Arial; COLOR: #000000"
bottomMargin=7 leftMargin=7 rightMargin=7 topMargin=7><FONT id=role_document
color=#000000 size=2 face=Arial>
<DIV>Hi Ken</DIV>
<DIV> </DIV>
<DIV>You are quite correct about the limited travel of the LMO tuning capacitor.
It is much easier to provide a linear frequency law over a restricted range
rather than all 180 degrees of travel.</DIV>
<DIV> </DIV>
<DIV>All of the LMOs in my SB units are from TRW. The tuning capacitors and worm
drives are in excellent condition and only require any dried grease to be
removed and replaced with new lubricant to give them a new lease of life.</DIV>
<DIV> </DIV>
<DIV><FONT lang=0 size=2 face=Arial FAMILY="SANSSERIF"
PTSIZE="10">73<BR></FONT><FONT lang=0 color=#0000ff size=4 face=Arial
FAMILY="SANSSERIF" PTSIZE="14"><I><BR>Bob</FONT><FONT lang=0 color=#000000
size=2 face=Arial FAMILY="SANSSERIF" PTSIZE="10"></I><BR>Bob F Burns G3OOU,
G-QRP 6907, @BobFBurns<BR>Crystal Palace Radio & Electronics Club: <A
href="http://www.g3oou.co.uk/">www.g3oou.co.uk</A><BR>Technical web site: <A
href="http://www.qsl.net/g3oou">www.qsl.net/g3oou
<DIV> </DIV>
<DIV>
<DIV>In a message dated 14/03/2016 01:42:33 GMT Standard Time,
kgordon2006@frontier.com writes:</DIV>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"><FONT
style="BACKGROUND-COLOR: transparent" color=#000000 size=2 face=Arial>On 12
Mar 2016 at 20:08, Guy Giacopuzzi wrote:<BR><BR>> reading (and receiving)
it on 7181khz...Did I do something wrong with the LMO? I checked it's
<BR>> range of movement,and with the tuning unit dialed all the way
counterclockwise, the variable <BR>> cap is almost closed; then, five
turns to the right and the cap is fully opened, as I recall. I didn't
<BR>> check it on any other bands, but at the moment, it would seem the
LMO's output is 219khz too <BR>> low....right? It's reading 219khz
low exactly on both bands..... Help....<BR><BR>Guy: What seems odd to me is
your "range of movement". As I remember <BR>it, the tuning cap in the last
Heathkit LMO I worked on only moved over a <BR>fairly small range of tuning,
not the entire capacitor's tuning range. As I <BR>remember it (and it has been
several years since I rebuilt an LMO) the <BR>range of movement was only about
1/3 the total available range.<BR><BR>But Heathkit used at least two different
makers of LMO, so perhaps yours <BR>and mine are by different makers. I think
the one I was working on was a <BR>TRW.<BR><BR>Now, as for your dial reading
219 kHz low, that sounds like the dial has <BR>either slipped, or the hub has
broken.<BR><BR>Have you measured the output of the LMO itself? It should be
5.0 to 5.5 <BR>MHz with a little "overlap" on both ends. Something like 4995
to 5505 kHz <BR>total.<BR><BR>Also it will read the 5.5 MHz at the low ends of
the bands, and the 5.0 MHz <BR>at the high ends: it "tunes
backwards".<BR><BR>Ken W7EKB
<BR>_______________________________________________<BR>Heath mailing
list<BR>Heath@puck.nether.net<BR>https://puck.nether.net/mailman/listinfo/heath</FONT></BLOCKQUOTE></DIV></A></FONT></DIV></FONT></BODY></HTML>