[AMRadio] WRL Globe Champion 350

[Joe & Judy Christian]

Hi Kim, say hi to John Fagan for me!   Look forward to hearing you on the 
Globe Champ.  I'm rebuilding my GK500B which I used as a kid and hope to 
have it on sometime this year.

Joe Christian
K5HMD

At 11:59 AM 02/25/03 -0600, you wrote:
>Hello to you all,
>
>I'm a new list member and am delighted to find such a resource.
>
>I've been a ham for a bit over 30 years, but almost never operated AM 
>until recently.  However, my Dad, W5JHJ, has been a ham since, well, I'm 
>not sure.  Probably 62 or 63 years (he'll be 81 this September).  He has 
>had some health problems recently and, at 80 years old, is no Spring 
>Chicken anymore. Anyway, he has some pretty neat old gear that he's 
>maintained, which I used when I started out 30 years ago: a WRL Globe 
>Champion 350 transmitter, a Hammarlund HQ-170 receiver, and a Hammarlund 
>HQ-110 general coverage receiver.  All of these he's had since new (the 
>transmitter kit was purchased in March, 1959).  He also has a mint 
>condition FT-102 in superb condition.
>
>He's always maintained all of the gear in good working order and when I 
>was very young (before kindergarten) was quite active.  But, with family, 
>the decline of AM in favor of SSB, and increasing job responsibilities, 
>his activity waned. Recently, he's become interested in operating a 
>bit.  So, last Saturday, we fired everything up. Aside from dirty switch 
>contacts, we got it all working fine. We even made a QSO with WA5UEK, in 
>Plano, TX, early Saturday evening.
>
>However, as we tuned up the Globe, we noticed that the plate current 
>swings down under modulation.  Adjusting modulation gain doesn't seem to 
>remove this tendency, though it is lessened until, of course, there is no 
>modulation.  I also notice very slight negative deflection of output 
>power, too.  Dad doesn't recall whether this was characteristic of the 
>rig, and no mention is made in the manual.  Our signal report was fine, 
>though we were only a couple of S-units above the noise, so poor audio 
>might not be noticed.
>
>I want to understand why we're seeing the negative deflections under 
>modulation.  I'd expect positive deflections, not negative ones. What is 
>this telling me about the transmitter's operation?
>
>73,
>
>Kim Elmore, N5OP
>                           Kim Elmore, Ph.D.
>                        University of Oklahoma
>         Cooperative Institute for Mesoscale Meteorological Studies
>"All of weather is divided into three parts: Yes, No, and Maybe. The
>greatest of these is Maybe" The original Latin appears to be garbled.
>
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