[AMRadio] More Viking 2 news


Ellen Rugowski ellenjoanne2003 at sbcglobal.net
Sat Feb 23 11:58:35 EST 2008


Hi Brett,

Thanks for the offer.  Sure, I'll take some.  Would you like money for the
postage?  My address is

Ellen Rugowski, AF9J
10050 West Beloit Road
Apt. 35
Greenfield, WI 53228


73,
Ellen - AF9J

----- Original Message ----- 
From: "Brett Gazdzinski" <Brett.Gazdzinski at verizon.net>
To: "Discussion of AM Radio in the Amateur Service"
<amradio at mailman.qth.net>
Sent: Saturday, February 23, 2008 9:23 AM
Subject: Re: [AMRadio] More Viking 2 news


> Ellen,
> I think I can give you a bunch of 807's, I don't and would not use
> them anymore, I go with KT88's or KT 90 tubes as modulators.
>
> So, I likely have a crap load of 807's (and 1625's).
>
> Send me your mailing address and I will get what I have out
> to you.
>
> You should check the screen and bias voltages at the tube sockets to be
> sure they are ok.
> Resistors in most applications can be off 20% without causing any
problems.
>
> Brett
> N2DTS
>
> ----- Original Message ----- 
> From: "Ellen Rugowski" <ellenjoanne2003 at sbcglobal.net>
> To: <amradio at mailman.qth.net>
> Sent: Friday, February 22, 2008 11:42 PM
> Subject: [AMRadio] More Viking 2 news
>
>
> > Hi Everybody,
> >
> > Work's been kind of nuts lately, and I've been pretty burned out.  So,
> > I've
> > only been able to work on my Viking II sporadically.  Last Sunday night,
I
> > finally got around to wiring up my D-104 with the mic connecter Ed,
VA3ES
> > sent me, for use with my Viking II.  With the mic finally wired up, I
was
> > able to determine that yes, my Viking 2 is wired up for PTT (the PTT in
> > mine
> > works fine). I also was getting OK modulation of of my Viking.  BUT,
after
> > no more than about 5 seconds of mic keydown, the modulator current would
> > surge, and start to run away.  Well, due to the fiasco the CQ 160m
Contest
> > is turning out to be for me, I decided to work on my Viking 2's
modulator
> > issue.
> >
> > Well, it looks like I found my problem in spades. After only about 2 or
3
> > seconds of mic keydown, in spite of the fact that I had the mic
gain/audio
> > level at zero, the modulator current surged again.  I unkeyed the mic,
let
> > things settle down, and keyed up the mic again, watching the 807s.  Sure
> > enough, the modulator current surged again, and when it was happening,
> > what
> > did I see? - a nice BIG arc over between the plate and the grids on one
of
> > the 807s!  I shut things down, pulled the 807 out that arced, fired up
the
> > my Viking 2 again, and keyed the mic, with only the non-arcing 807
> > installed.  Nothing happened, other than the fact that the modulator
> > current
> > stayed
> > steady at a pretty low level (due to there only being one 807
installed).
> > So, it looks like I need to buy another 807. And maybe, it might
> > be wise for me to get two of them, and save the one remaining good one
> > have
> > at the present, for a spare. BTW, the resistor on the plate cap for the
> > bad
> > 807 is supposed to read 22 ohms. Assuming that's it's your typical
+/-10%
> > resistor (personally I prefer +/- 5% or better), it shouldn't read more
> > than
> > say 25 ohms.  The cap resistor on the bad 807 read 28 ohms.  Well, there
> > isn't much more I can do with the Viking 2, until I get the new 807s.  I
> > don't feel like pulling off the mic connector I installed for the Viking
2
> > (wiring up mic connectors is a pain), and I haven't gotten the mating
> > connector yet, that I need to wire up an adapter cable, so I'm out of
luck
> > with using the Scout for tomorrow's Midwest Classic net.  I'll only be
> > able
> > to listen to Rob, run the net.  Well, I think I'm going to call it a
> > night,
> > I'm falling asleep.
> >
> > 73,
> > Ellen - AF9J
> >
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