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Walt Cates
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WD0GOF Ham Since 1969
United States

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My Ham Radio Interests
I am retired now but spent 43 years in Electronics Research and Development. I started in avionics, went to agricultural instrument research, then medical & chemical instrumentation and analysis and ended up in the dark world of crypto technology and tempest computers.
For the last 30 years, as a hobby, I have specialized in repair and restoration of the Hallicrafters SR series transceivers. I have written in depth repair and restoration manuals for each radio in the series. These documents are available free of charge on either of the two Hallicrafters User Group sites. I mentor on these systems on the air and via email. I was working for Wilcox Avionics in the 60’s & 70's when Hallicrafters became part of Northrop/Wilcox. I was taken by the Hallicrafters gear so much so that I went and took the test and got my call sign. I opened a hobby business on a limited scale repairing Hallicrafters SR series and the FPM 300 radios. I left Wilcox in 79 and due to business travel requirements I became a dormant ham. On a very limited scale I continued servicing radios and kept the call sign active. In '95 I retired (at 54) and spent 5 years RV’ing the USA. With that out of our systems my wife and I settled down to retired life with church and family. I became an active ham again. I had a bunch of old "H" stuff around. I sold all the old tube junk. This funded the purchase of top of the line MODERN equipment. I still have nightmares over that act of stupidity. It only took me a year to realize, that was a mistake. I sold all the Taiwan and Japanese gear and started re-collecting Hallicrafters SR series "tech units" and "parts units". To date I have not purchased a single working rig although I have bought several “it worked fine the last time I used it” rigs. I have a complete collection of the full production SR series HF transceivers in operation in the shack. There are 7 full production rigs in this series and I have restored many of each from the 100watt SR-150 to the 1000watt SR-2000. I have one of each in the shack. In 2015 I closed my repair shop. In the interim I repaired and sold off all the shelfed rigs I had. I have to admit that I enjoy repair and restoration more than operation. Of the series, my favorites are the SR-500 and the SR-2000. The 500 has only two "bells or whistles" xtal cal and RIT so it is truly nostalgic operation. It is quick to tune, very stable (now) and enough punch to get through the noise. I don’t contest and if I ever make a DX contact, well that’s nice. I’ll have to admit that it is not a CW rig, no narrow filter, no VOX (unless you add the HA16 VOX unit) and no break-in keying. But then I have a hearing condition that runs the dots and dashes together at about 9 wpm so that makes me a nuisance on cw.
I am not a proficient operator or rag chewer. The majority of my air time is testing recent repairs or restorations. However I do enjoy technical rag chewing.
Due to recent health issues I no longer provide repair and restoration service.
After closing the repair center I started documenting all of the knowledge on the Hallicrafters SR series I have developed over the years. I have built a website using WORDPRESS. This is a free sharing website and everything is downloadable. Go to

SR-150, SR-160, SR-400 (Cyclone I, II, and III), SR-500, SR-2000, 80 thru 10 meter AV-18HT.

Other Interests
Church building maintenance and I lead a small group Bible study. I am also into Wood fired meat smoking. See more about these and radio interests @


Connections for wd0gof

CallsignNameConnection TypeConnections 
NC4D Joey Sapp Group, Association or Club2 Request Connection
KW4VL Victor Langley Other468 Request Connection
KA4PNO Keith Potter Group, Association or Club5 Request Connection
N5FKW James "jim" Lotspeich Other43 Request Connection
PA1WLB Willem Luijten Friend91 Request Connection
W9ZT Brad Wessels Other11 Request Connection
WA7DUY Jim Pruitt Other50 Request Connection
AE0V Donald Barrow Other4 Request Connection
LA4DW Eirik (Eric) Bergum Other6 Request Connection
DK3HE Eberhard Hewicker Friend1 Request Connection
WB4IUY Dave Hockaday Group, Association or Club382 Request Connection
AA0MV Steven Couch Other6 Request Connection
IK1LBL Mario Del Panta Colleague6 Request Connection
W6QT Michael Koffler Other110 Request Connection
KD0LOS Joe Andrews Other1 Request Connection
WD6ELU Randy Seden Other1 Request Connection
VE7WLK Tom Kruesel Other1 Request Connection