[R-390] R390 progress

[Dan Merz]

Roger, others,   thanks for all the ongoing help/suggestions.  I finally put
the oscillator chassis back together and back in the set.  It didn't take
long to tweak the various bands with the trimmers and all bands are working.
I've had the radio on for about 8 hours and still going strong - very stable
beast.  It survived being around all the dead horses and seemed to like it.

I think it has better audio than the 390a before I put the audio chassis mod
in.  20/40 and 80 meters were pretty busy at various times today.  I even
heard one guy on 160 mention my home town,  Wasco,  CA which doesn't get
much press outside of the Central Valley.  So it's a good radio.  I see what
Roy meant about the heat out the side where the 6082's reside.  It's
probably around 100 to 120 F judging by the touch.  I have it setting on
some narrow sticks of wood with about a 1 inch gap underneath right now.
I'll take a look at Roy's fan arrangement and consider that.  I haven't
replaced a single cap in it but I noticed earlier that some of the caps in
the audio chassis had been previously replaced.  I didn't look at the
circuitry close enough to tell if other changes had been made but the tube
line-up is original types,  except for the sub of 12BW4's for the 25Z5's and
12BH7 for the ballast tube, which I did.  I'll listen to it for a while
before tweaking it more.

One of the annoying features of the manual I downloaded from Logsa was the
overall schematic which I have trouble printing into a good size.  It's ok
using it on the computer but that's not always the handiest way.  I mostly
worked with the individual sections and printed these out.  I noted that
there was a 185 Mb file TM-11-856 archived that claimed to have all the
schematics on a site called jamminpower.  I could get that when I visit my
son-in-law with his high speed connection if it's worth the effort.  Does
anyone have a favorite/good method to obtain and print out the r390 non-a
schematic?   Dan    

-----Original Message-----
From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net]
On Behalf Of Flowertime01 at wmconnect.com
Sent: Tuesday, May 03, 2005 4:12 PM
To: r-390 at mailman.qth.net
Subject: Re: [R-390] R390 progress 6AK5/6AJ5

Dan,

Your talking about the 6AK5 vs the 6AJ5.
There are so many differences between the R390 and the R390/A.
As we look back on the history of the receivers we wonder what was driving
the design. We do speculate and have created a few dead horses along the
way.

Sure is nice to hear you are making progress. 
Mostly you are doing what you want to do and enjoying it.
That what's supposed to happen.

Keep the solder flowing.

Roger KC6TRU
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