[AMRadio] Globe Champ 350

Sun Sep 26 12:00:18 EDT 2010

I should add that I think Dad also re-capped the HQ-170 as well. He 
performed some mods to it that are obvious: it has a BNC IF output 
port on it, and he has changed the antenna inputs for both the HF and 
VHF (6 m) antennas to be high-quality SO-239s. I remember that the 6 
m antenna port was for 300 ohm twin lead. If my memory is right, that 
also means that he probably added an impedance transformer inside 
somewhere for the 6 m antenna port. He also added a 1/8" phone plug 
to the speaker output.

It's probably wise advice to add an outboard power source for the 
filament supply -- that alone is a significant load. He has 3B28's as 
the HV rectifiers, not the old 866As. I loved the beautiful blue from 
the 866As, but he kept having problems with them flashing over and 
becoming poisoned, so he switched to the 3B28s and had no further problems.

I know that he made other mods to the Globe: I think he changed a 
bias circuit in it, possibly the scree supply, and disabled the "SSB" 
position of the mode switch, which changed the amd made the a linear 
amplifier for use with a DSB exciter made by WRL. So, it's not 
original. But, it had been his since new (bought in 1959 for the 
princely sum of $450 as a kit) and it was the rig I operated through 
about 1980 or so. So, it's certainly precious to me!

73,

Kim Elmore N5OP
OOTC 4563
QCWA 32279
FISTS 11093
ARRL Life

At 08:39 AM 9/26/2010, Mike Sawyer wrote:
>Kim, (and others),
>     Be very mindful that the Achilles heal to this rig and its subsequent
>older brethren is the LVPS transformer. Somehow, Leo Myerson and crew, got
>damn near everything on this transformer that they could. Most of all the
>filament voltage, (2 X 6.3vac, 2.5vac, 5vac, 12.6vac)  as well as 100V and
>900V taps. This produces allot of heat for the core. I found this out the
>hard way!
>Mod-U-Lator,
>Mike(y)
>W3SLK
>----- Original Message -----
>From: "Kim Elmore" <cw_de_n5op at sbcglobal.net>
>To: <amradio at mailman.qth.net>
>Sent: Saturday, September 25, 2010 2:10 PM
>Subject: [AMRadio] Globe Champ 350
>
>
>Well, I have finally had some time to check out the Globe Champ 350
>that I got from my Dad (W5JHJ - SK). I used a variac and brought up
>the voltage slowly during the morning to be nice to the
>electrolytics. I finally had it up to 120 VAC and decided to try a
>tune-up. Everything seems to work! Switches are dirty, but a bit of
>contact cleaner carefully applied should help that.
>
>I had to do the tune up all by memory. At one time, I know that my
>Dad had the original manual for it, along with the original sales
>slip. In that manual, he had noted what mods he had made.
>Unfortunately that has somehow disappeared, so I'll need to get
>another copy of the manual.
>
>I'm now doing the same with his Hammarlund HQ-170 receiver, to get it
>back up to snuff. I'll need to get a manual for that, too, as all of
>his manuals were missing. I don't have the rigs in my shack, yet. I
>also need to set up a 4 position coax switch "backwards" so that I
>can use all my rigs with the same antennas without playing with coax
>connectors.
>
>I have a very small bit of work to do with the Champ: Dad had mounted
>a small Dayton blower on the side to help control heat. It was
>plugged into a switched 120 VAC outlet on the back of the rig. That
>socket was broken during the move, so I need to fix that. I may need
>nothing more than some epoxy, but I'll have to look carefully.
>
>I'd like to set it up with the HQ-170, but may need to rearrange some
>equipment to fit it all in. I really wish I had all of Dad's
>documentation, but I at least have the rig. I hope that in the near
>future, I can play a bit of AM with the rest of you!
>
>73,
>
>Kim Elmore, N5OP
>
>
>
>______________________________________________________________
>Our Main Website: http://www.amfone.net
>AMRadio mailing list
>Searchable Archives: http://www.mail-archive.com/[email protected]/
>List Rules (must read!): http://w5ami.net/amradiofaq.html
>List Home: http://mailman.qth.net/mailman/listinfo/amradio
>Post: AMRadio at mailman.qth.net
>To unsubscribe, send an email to amradio-request at mailman.qth.net with
>the word unsubscribe in the message body.
>
>This list hosted by: http://www.qsl.net
>Please help support this email list: http://www.qsl.net/donate.html