[Johnson] learning loads

Wed, 11 Feb 2004 22:56:11 -0800

Ken...I have been studying Rich Measures AG6K's web site with attention
to parasitic suppression. I can't tell you how much I have learned by
studying that site.
I urge you to take several good, long looks at his info and you probably
will not have a problem finding your problem. 

http://www.somis.org/

I got a Millen grid dipper off Ebay and it is an important piece of test
gear. 
I was surprised to find that the Collins 30L-1 has a monster resonance
at 90mhz right where Rich said it would be.
When you get a dipper, put the coil very close to the plate blocking cap
and find the dip.
Be advised, you will probably have to replace the dippers electrolytic
power supply caps.
You can listen to the note on a receiver and if it sounds rough, just
change em' out.

Regards

Dave Harmon
NSRCA 586
K6XYZ[at]comcast[dot]net
Torrance, Ca.

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of KENNETH A CRIPS
Sent: Wednesday, February 11, 2004 10:43 PM
To: Johnson
Subject: [Johnson] learning loads

I have been studying VHF parasitic suppressors, very interesting.  With
what 
I have learned I can see why the Viking II would be touchy The 6146 will
resonate into the VHF region making suppression of parasitics in this 
frequency
all the more important. Running a pair of these tubes in parallel makes
it 
even worse.
With this knowledge I have added yet another piece of test equipment to
the 
list I take to the next ham feast  I need a dip meter in order to
properly 
test a suppressor. I sure am glad I am learning this. Working on
transmitter 
is a different them working on a
receiver.  I suspect I am going to need all of what I learned and more
on 
the Viking 1.
I am going to do wholesale parts replacement on it. The soldering is
rotten, 
and many
sort cuts were taken.  Fortunately the lay out of the Viking I is a
little 
better then
the second model.

                       Ken

Kenneth, Amateur Radio Station W7ITC. AMI 873
Home of the Chew Crew II, Irish
Terriers Beezie, Chic' and Cowboy

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