<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
Well, when checking the tubes, the 50C5 came up "leaky" (whatever
that is..).....I scrounged around in my garage for an hour--found a
lone 50C5...tried it in and the the radio woke up
dramatically....got WWV at 5, 10 <i>and</i> 15 mc... and a ton of
stations above 11...I was just wondering if there were any other
tricks someone's tried to up the sensitivity/rf/af gain....funny
thing though...I remember when I was in 7th grade I was hoping for a
GR-64 for xmas, and praying that my parents would go the few extra
dollars (about 20 at the time...) for the GR-64 over the
GR-81...they did...and the difference between the radios is amazing
( I bought the 81' at a flea market about 10 years ago...tried
it...got very little...and put it away) If fact, the GR-64 seems to
out perform most 6 tube sets on just four tubes....<br>
Guy<br>
<br>
<div class="moz-cite-prefix">On 1/5/2014 4:13 PM, Mark Johnson
wrote:<br>
</div>
<blockquote cite="mid:BLU0-SMTP9542B4647A46AF20BEE31AA9B70@phx.gbl"
type="cite">Hello Guy,
<br>
<br>
<blockquote type="cite">From my experience with one, you need a
great deal of patience and need to </blockquote>
learn to adjust the regen control to the sweet spot. That comes
with practice.
<br>
<br>
Also, as per the manual, there is quite a difference depending on
which antenna lug you select. Long ant, short ant. You also have
to juggle the regen control with the bandspread control while
tuning in a station.
<br>
<br>
My radio worked fine but practice and patience are
required...also..there are limits given its simplicity...
<br>
<br>
Mark
<br>
<br>
VE3LU
<br>
----- Original Message ----- From: "Guy Giacopuzzi"
<a class="moz-txt-link-rfc2396E" href="mailto:gggdds@js-net.com"><gggdds@js-net.com></a>
<br>
To: "heathkit listserve" <a class="moz-txt-link-rfc2396E" href="mailto:Heath@puck.nether.net"><Heath@puck.nether.net></a>
<br>
Sent: Sunday, January 05, 2014 12:20 PM
<br>
Subject: [Heath] Improving the GR-81?
<br>
<br>
<br>
<blockquote type="cite">Is it just my unit, or has anyone else
noted the lackluster performance of the GR-81 regenerative
shortwave receiver? Looking at the schematic, does anyone have
any ideas to improve it? Mine "works" and get's reception, but
it lacks sensitivity and audio gain. I've checked the wiring,
and it's perfect...will check tubes next. Any other ideas?
Regeneratives are suppose to be incredibly sensitive and
otherwise, loud...mine is anything but....
<br>
<br>
Guy
<br>
-- <br>
<br>
<br>
_______________________________________________
<br>
Heath mailing list
<br>
<a class="moz-txt-link-abbreviated" href="mailto:Heath@puck.nether.net">Heath@puck.nether.net</a>
<br>
<a class="moz-txt-link-freetext" href="https://puck.nether.net/mailman/listinfo/heath">https://puck.nether.net/mailman/listinfo/heath</a>
<br>
<br>
</blockquote>
<br>
<br>
</blockquote>
<br>
<div class="moz-signature">-- <br>
<img src="cid:part1.09060404.03040608@js-net.com" border="0"></div>
</body>
</html>