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<DIV>Morris:</DIV>
<DIV>I have a Heath AJ-30. It has a 10 KHz. whistle filter in the audio
output that is tuned to a null at 10 KHz. Yours may be the same.</DIV>
<DIV>Dan Terry</DIV>
<DIV> </DIV>
<DIV>
<DIV>In a message dated 2/22/2012 7:10:37 A.M. Eastern Standard Time,
mdilli@nnwifi.com writes:</DIV>
<BLOCKQUOTE style="PADDING-LEFT: 0px; MARGIN-LEFT: 0px"><FONT
style="BACKGROUND-COLOR: transparent" color=#000000 size=2 face=Arial>
<DIV><SPAN class=298105123-23012012><STRONG>I just acquired one of each of
these high fidelity AM tuners and could use some documentation.
Since they both appear to be quite similar, docs for either would probably be
sufficient. </STRONG></SPAN></DIV>
<DIV><SPAN class=298105123-23012012><STRONG>
<DIV><STRONG><SPAN class=088261300-22022012><FONT color=#0000ff>I <SPAN
class=298105123-23012012>have </SPAN>forged ahead, repairing a<SPAN
class=298105123-23012012> locked slug in an</SPAN> IF
transformer <SPAN class=298105123-23012012>in the non-functional one
</SPAN>and then with comparison to the working <SPAN
class=298105123-23012012>one </SPAN>for alignment. The IF
frequency seemed to be non-standard around 460 KHz (yes, I tried 455 KHz but
it had problems) so I used that and the old tuner came up<SPAN
class=298105123-23012012> FB</SPAN>. The only <SPAN
class=298105123-23012012>question </SPAN>remaining is<SPAN
class=298105123-23012012> about</SPAN> what appears to be an
adjustable filter coil on the output stage. I am
assuming that it is for blocking any residual IF frequency that might slip
through detection and beat with a recorder erase
oscillator.</FONT></SPAN></STRONG></DIV></STRONG></SPAN></DIV>
<DIV><SPAN class=298105123-23012012><STRONG></STRONG></SPAN><SPAN
class=298105123-23012012><STRONG></STRONG></SPAN> </DIV>
<DIV><SPAN class=298105123-23012012><STRONG>Thanks for the
bandwidth,</STRONG></SPAN></DIV>
<DIV><STRONG></STRONG> </DIV><!-- Converted from text/rtf format -->
<P align=left><FONT size=2 face=Arial>Morris</FONT> </P>
<P><EM><FONT size=2></FONT></EM></P>
<DIV> </DIV><BR><BR>_______________________________________________<BR>Heath
mailing
list<BR>Heath@puck.nether.net<BR>https://puck.nether.net/mailman/listinfo/heath<BR></FONT></BLOCKQUOTE></DIV></FONT></BODY></HTML>