KWS-1 Troubleshooting: First Analysis

One of the things I can do is trace the lines from the 4X250B final tubes (the schematic shows 4X150A), and see where their grids would get their current. It seems the 6CL6 driver tubes are one thing to keep in mind. The green boxes are the readings I get right off the rig – and they are all good. I didn’t check anything…

Collins KWS-1 and the MFJ-267 Dummy Load

The MFJ-267 Dummy Load / Wattmeter MFJ makes a lot of great little boxes, and yes, they are “cheap” when compared to other manufacturers. For example, this product only costs $139.95. Because of their low price, they are ripe for modifications to improve them – which I wouldn’t do to more expensive gear. You can switch the unit so it is just a dummy…

The Creekside Bobtail: Part 2

The 40M Bobtail will be perfectly aimed for Bouvet Island Elevating the antenna 10′ offers a lower takeoff angle and makes it easier to install hanging from 2 trees that can support the height It just so happens that I have two trees where I could get the Bobtail up off the ground about 10′. Switching to all wire elements changes the geometry a…

Collins KWS-1 Serial Number 1572

Only 1600 Collins KWS-1 transmitters were built in 1955 or so, and just after these were produced, Collins went on to define modern rigs with the “75S” series transmitter and receiver pair – followed by the legendary KWM-2. The fact that mine is #1572 is a real honor. Half of these were destroyed by the US Army after they had their need for them….

KWS-1 on its Way!

Its going to very exciting to get the KWS-1 on the air within a couple of weeks. In fact, I have been MUCH more excited about this than any other aspect of Ham Radio in recent months and even years. I’ve restored the Power Supply and will turn it on for a half hour or hour to “burn it in” – but it did…

Back to the Future

I have returned my station back to its “pre – 3Y0I” glory. I’m glad the team avoided that nasty giant cyclone, and wish them luck in the future. I’m very much looking forward to getting the Collins KWS-1 back now – I can devote all of my ham hobby time on my new love – “hollow state” and vintage ham gear. Using vintage microphones…

Fun Testing Tubes!

Inside the Collins KWS-1 power supply. There are voltage regulator and rectifier tubes. Its quite a surprise – what a “soothing” thing it is to test tubes. I’ve had an “interesting” first two months of this year, and am so thankful to have time to get back into the hobby again. What better way than to make sure the KWS-1 power supply is running…

Hollow State

Eimac 4X250B – beautiful little tubes . . .  The restoration of my KWS-1 will begin this weekend. I expect it to be a good 2 weeks at least before it is done. While I am waiting – I will restore the power supply – which is the easy part. I might invest in a tube tester – there are some nice one’s under…

1955 QST Collins and Eimac Advertisements

Left side page for a Collins 1955 QST Introduction advertisement Right side of the ad Eimac was right here in the San Francisco Bay Area. I worked in San Bruno once – so its cool that such a legendary company was here in my back yard. Luckily – I have 2 NOS 4X250B tubes

The Gold Dust Twins Have Landed at KY6R!

A bit rough looking, but it did turn on today and both units look quite good inside We went to one of the coolest places I’ve ever been to as far as antique radios is concerned – Sacramento Radio Expo. Doug, WB6LOO, the proprietor, is an Electrical Engineer who has taught classes at Stanford. Since his retirement – he has been purchasing estate sales…