The brochures for the 2005 CC-AWA Annual Conference are in the mail. If you've attended the Conference anytime since 2002 or if you're a CC-AWA member, you...
Wireless Mavens, I'm working on a new regenerative receiver demonstration. In "The Regenerative Circuit" (The Electric Journal, April 1921) Edwin Armstrong...
Way back, in the dim and distant past, I heard an old recording of several different early spark transmitters. They all had their own distinctive note and it...
Try looking on the Libriary of Congress website. They have many old recordings that you can download. Many of the recordings are from 78 records. It takes some...
Thorn Mayes' "Wireless Communication in the United States" says that as of 1908 the South Wellfleet station had a 35-kW plain spark, but says that new...
Ludwell Sibley
tubelore@...
Feb 14, 2005 7:28 pm
4511
MCC would probably have used a rotary spark gap or a quenched spark - I think Alexander alternators came a few years later but I may be wrong. I saw a...
wy7z@...
Feb 14, 2005 7:30 pm
4512
Thanks Lud, That's the best information I have so far. I guess the important question is what frequency was the AC feeding the spark transformer? Al Al Klase...
... Somewhere in all my stuff I have a cassette tape of a spark station. Don;t remember what the traffic was. I'll look around and see if I can find it. Maybe...
In a message dated 2/14/2005 5:55:16 PM Eastern Standard Time, kc4yoy@... writes: Somewhere in all my stuff I have a cassette tape of a spark ...
Mwcpc3@...
Feb 15, 2005 2:07 am
4515
Aww, you made me do some work . . . Some useful hints are contained in Bud Hall's story on MCC in the May 1996 "OTB." The AC feed was apparently at "power"...
Ludwell Sibley
tubelore@...
Feb 15, 2005 3:12 am
4516
-In order to avoid "re-inventing the wheel" may I refer you to two websites that may be of help?: ADVENTURES IN CYBERSOUND:The sounds of a spark transmitter: ...
There are some interesting additions to the TCA photo gallery. Thanks to Dan Stocks we have some really neat photos of a working Ignitron NL-1001. And thanks...
In a message dated 2/15/2005 12:19:53 AM Eastern Standard Time, w2ioj@... writes: -In order to avoid "re-inventing the wheel" may I refer you to two ...
Mwcpc3@...
Feb 15, 2005 2:23 pm
4519
Thanks Jimmy, That will be helpful. For those reading along: I found the link to sparkx3.AIFF to be broken, but Google found the file at a number of places ...
I've added another set to my super-het page. Check it out, http://radioheaven.homestead.com/superhets.html Ron Ron Lawrence, kc4yoy (Curmudgeon in training) ...
Hello. I need some help identifying a radio. It is a De Forest-Crosley (Canadian) 2 volt battery set. There is no model number marking readable. I have...
... either ... Hi Dave, Try DeForest model # 7D561 or 7D562. I'm looking dor the schematic for you, but my lit. only covers the Rogers version of the model....
The chassis is indeed a DeForest model #7D561. Another list member sent me the schematic. But the MODEL number is still a mystery! I hope one day to find ...
To all, Just found - an interesting on line article about tubes. http://www.inventionandtechnology.com/2002/02/tube.shtml The Tube is Dead. Long Live the Tube....
John Dilks K2TQN
oldradio@...
Feb 24, 2005 9:07 pm
4526
Due to retirement we are selling out a complete Radio and TV business. Tons of transistors, capacitors, resistors, tubes, test equipment and new boards and...
Hi Does anyone know what a Hammarlund Super-Pro SP-600 -JX sells for...I have a guy that wants to sell me one...He is not sure if its the 600-JX or the...
... $300 - $500 on eBay. ... The 600-J is tuned by VFO only. The 600-JX also has 5 or 6 crystal positions for fixed-frequency reception. Dale H. Cook, Chief...
The "X" indicates it has optional crystal control on six channels. I paid $175 for one in good mechanical shaope but with some electrical "improvements" that...
Ludwell Sibley
tubelore@...
Feb 26, 2005 3:10 am
4530
Folks, I found these articles very interesting..... I've not yet spent any time in thinking about how this knowledge could be directly applied to vintage ...
Hi Michael, in working condition they go for 350-450, certain models like the jx17 go in the 500's. Completely restored can go around 600-800. Some of the...
I rode up to the Elkin Ham Fest with my friend Mark kc4yoi yesterday morning. It's a small event, but usually has some real goodies. I've guess I've been going...
The weekend is coming to an end and here is the note accompanying my log sheet: Enclosed is my log sheet for the AWA AM QSO PARTY. Although a problem...
I second your observations Tom! This QSO party was a resounding success. I have never heard the amateur AM community enjoy so thoroughly an on the air get...
