<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
Does the diode forward/reverse ok??<br>
I don't know what the likelihood of a diode's conductivity
characteristics being ok...yest still be shot. Perhaps someone else
on <br>
the list can comment. <br>
There are a few on ebay, but too pricey. <br>
I'll bet there are HUNDREDS in ham's parts bins.<br>
If you determine that is truly the culprit...I would put a few
"wanted's" out, here and on the homebrew section <br>
of eham.net<br>
<br>
....Dave<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 1/21/2014 10:15 PM, Alexander N.
Gerli wrote:<br>
</div>
<blockquote
cite="mid:CACs0R20=cEYf1M4PwXXHD-mAhmGr-276aug5GcWKEKJONP6gDw@mail.gmail.com"
type="cite">
<div dir="ltr">
<div class="gmail_default"
style="font-size:large;color:rgb(0,0,255)">Hi, everyone,<br>
<br>
</div>
<div class="gmail_default"
style="font-size:large;color:rgb(0,0,255)">My HL-2200 is
running fine except for one small thing: the Relative Power
positions on the Meter switch don't read.<br>
<br>
</div>
<div class="gmail_default"
style="font-size:large;color:rgb(0,0,255)">I've checked the
parts in the chain, and I'll bet the 1N191 Germanium diode is
shot. All the other parts in the resistive divider chain check
out, both at the output SO-239 terminal strip and also on the
terminal strip below the multimeter.<br>
</div>
<div class="gmail_default"
style="font-size:large;color:rgb(0,0,255)">Gotta be that
diode.<br>
<br>
</div>
<div class="gmail_default"
style="font-size:large;color:rgb(0,0,255)">Problem is...1N191s
aren't available any more, and they're Germanium which makes
them a bit fragile for reverse voltage peaks. The '191 has a
PRV of 90V which seems awfully low, even given the 68K ohm 2W
sampling resistor ahead of it going to the SO-239.<br>
<br>
</div>
<div class="gmail_default"
style="font-size:large;color:rgb(0,0,255)">What to do? Does
anyone on the List have any suggestions for a good substitute
which is readily available? I have some 1N270s, but they're
Silicon and perhaps not as sensitive as those Germaniums.
Seems to me that I should use a diode with a PRV of more than
just 90V!<br>
<br clear="all">
</div>
<div>
<div dir="ltr">
<div>
<div>
<div>
<div>
<div>
<div><span
style="font-family:arial,helvetica,sans-serif"><font
size="4"><span style="color:rgb(0,0,255)">
<div class="gmail_default"
style="font-size:large;color:rgb(0,0,255);display:inline">
Thanks for your help, as always!</div>
<br>
<br>
</span></font></span></div>
<span
style="font-family:arial,helvetica,sans-serif"><font
size="4"><span style="color:rgb(0,0,255)">
<div class="gmail_default"
style="font-size:large;color:rgb(0,0,255);display:inline">
73, Sandy AC1Y</div>
<br>
<br>
Alexander N. Gerli, Sr.<br>
</span></font></span></div>
<span style="font-family:arial,helvetica,sans-serif"><font
size="4"><span style="color:rgb(0,0,255)">548
Allred Mill Road<br>
</span></font></span></div>
<span style="font-family:arial,helvetica,sans-serif"><font
size="4"><span style="color:rgb(0,0,255)">Mount
Airy, NC 27030-2202<br>
<br>
</span></font></span></div>
<span style="font-family:arial,helvetica,sans-serif"><font
size="4"><span style="color:rgb(0,0,255)">Scotsmen
walk about 900 miles each year.<br>
</span></font></span></div>
<span style="font-family:arial,helvetica,sans-serif"><font
size="4"><span style="color:rgb(0,0,255)">A Scotsman
drinks around 45 gallons of Whisky a year.<br>
</span></font></span></div>
<font size="4"><font size="4"><font size="4"><font size="4"><font
size="4"><font size="4"><font size="4"><font
size="4"><font size="4"><font size="4"><font
size="4"><font size="4"><span
style="font-family:arial,helvetica,sans-serif"><span
style="color:rgb(0,0,255)">Scotsmen
get about 20 Miles Per Gallon.</span></span><br>
</font></font></font></font></font></font></font></font></font></font></font></font></div>
</div>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
Heath mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Heath@puck.nether.net">Heath@puck.nether.net</a>
<a class="moz-txt-link-freetext" href="https://puck.nether.net/mailman/listinfo/heath">https://puck.nether.net/mailman/listinfo/heath</a>
</pre>
</blockquote>
<br>
</body>
</html>