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Don Dulmage
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VE3LYX Ham Since 1980

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Other Callsigns
First issued VE3LYU

My Ham Radio Interests
Homebrew tubes CW and AM. Minimalist style.
Skeds for low power QSOs with homebrew stuff.

50C6 Cw rockbound with matching 12sn7 regen.
01 TNT 40M with matching 01 regen
40M hartley CW
80M x 40M Am transceiver HB
Two No 19 Wireless Sets
6l6 Breadboard Cw TX and matching 6sl7 regen.
BC454 recvr Operational 80M
ARC 5 T18 transmitter which now covers all of 80M band in CW and AM (cathode modulated through CW key jack)
Twin 811A HB linear Amp.

Other Interests
Speak Deutsch at a functional level, can get by in French but it is hardwork for me.
Make fiddles and play them. (gospel and country)
Drag racer . I run The Senior Dragster. Slant six powered.
I race it at Picton Airfield
Am a writer. I have two books published and many magazine articles in both the USA and Canada. I used to have my own opinion column in a local paper for several years.(View from the Ridge)
Cast aluminum for fun.
Also raised cattle for several years and trucked them. I also bought and sold for others. (Dolmetsch Beef Farm)

In the interest of allowing others to enjoy their clubs I now refrain from joining.(does not play well with others)

pre 1929 TNT testing cathode modulated


2/21/2014 3:43:40 PM (0 comments) Add a commentAdd Comment

After some thrilling experiences testing loop modulation on my 45 tubed TNT I dug out a series cathode modulator I made for it some time ago but never used on the air with this rig. It uses a 01A tube and is my own circuit. I will be testing it this weekend on 7290 and 7295khz as time and space permit. Power will be less then when loop modulated but not huge less. Perhaps 25%. Since I was making the trip well anyway it should be ok. Please if you hear me on jump in and let me know.
The TNT is a 45 tube with 226 volts on the plate keydown and draws 30 to 40 mils depending on where I am tuned to. Antenna is a single wire feed, end fed long wire. A hb tuner keep it honest between the TNT and the antenna. In fact I am convinced the tuner is a large part of my success with this rig. Focused energy if you know what I mean.
Band conditions today were such that the effort was almost pointless. Still I gave it a shot.

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