Collins 21E Still in use in California

[W2PFY]

Also some Blaw Knox antenna

http://www.fybush.com/featuredsite.html

I love this S+++

[W3SLK]

There was a neat article two months ago in RADIO GUIDE[/i] about the diamond shape Blaw-Knox towers. Made for real interesting reading.

[Glenn NY4NC]

Are you an AM broadcast DX'er Terry? I was really into it at one time...
Now that I have land to play with, I will once again be erecting beverages and returning to that wonderful pastime of am broadcast dx'ing

Also some Blaw Knox antenna

http://www.fybush.com/featuredsite.html

I love this S+++

[W2PFY]

Yes Glen, I like AM DX. A few years back reeled out 500 feet of # 10 insulated wire on the forest floor heading generally west. West was the only direction I could go without running into things. I picked up stations from Europe broadcasting on AM between 125 & 180 kcs but never good enough to get their call sign. I understand they are running hundreds on KWS on those low frequencies. I often wondered what the tank circuit would look like for that service.

A few years back I visited a marine SW service in the Gulf of Mexico. On frequencies below 500 kcs they used a pair of triodes in push pull. They were Westinghouse WL5736 tubes with 2.5 KW of plate dissapation each. They used an iron core transformer in the output which really surprised me. The driver was eight 807 tubes in push pull parallel.

These transmitters were earlier versions of my MW-2. I wish I had picked up one of those transformers as they were going out for junk. They only weighed about 30 pounds.

Maybe more later.

73

TY

[k4kyv]

I bookmarked the fybush site.

A suggested project for someone with money and time on their hands: using a copy of the original Blaw Knox blueprints, construct a scale model of the WSM tower, suitable for ham use, 135' tall, about a quarter-wave on 160.