"I am often asked how radio works. Well, you see, wire telegraphy is like a very long cat. You yank his tail in New York and he meows in Los Angeles. Do you understand this? Now, radio is exactly the same, except that there is no cat." : Albert Einstein
Tuesday, January 15, 2013
From Backblocks To High Seas
I came across this great piece of history via the Google+ page of Cristian YO8TNB and had to share it here for others to enjoy. I have a soft spot for New Zealand, being so close to my country of birth, and I particularly noticed the carefully cultured accent of the announcer. On a more serious note, this video is an invaluable record of the wired and wireless technology used in 1939 and the procedures for transmitting a message from land to sea.
Monday, January 14, 2013
KARS Presentation - Ham Radio Resources on the Internet
At the Katy Amateur Radio Society business meeting I presented a brief rundown of a Internet resources that might interest the Radio Amateur. Here is that presentation in Google Docs format.
Labels:
amateur radio,
computer,
downloads
Monday, January 7, 2013
Philco Tropic Model 3012
Last weekend I attended the Houston Vintage Radio Association holiday dinner & picked up a Philco Tropic Model 3012 during the fundraiser auction. I had let a few other radios go without placing a bid and was beginning to think I might go home empty handed when I saw the Philco "on the block". A few seconds later I was the proud owner of this vintage receiver.
Information on this model seems a little scarce, however the style of case was introduced by Philco in 1951 and used in their line of AM/FM receivers for many years after that. This particular example is a transformer-less AC/DC set with a potentially live chassis and the unusual (to me) lineup of 14Q7, 7B7, 14B6, 35A5 & 35Y4 vacuum tubes.
What prompted me to bid on this particular radio was the inclusion of two shortwave bands in addition to the typical AM broadcast band. The dials are marked off in meters which also appealed to the ham radio side of my interests.
After attaching a short length of wire as an antenna I was able to pick up signals across the two SW1 & SW2 bands so I'll be interested to see what it can receive with a long wire antenna at night.
After a gentle cleaning with dilute mild detergent to remove dirt I rubbed in some beeswax polish to restore the original gloss. Sadly the plastic dial is cracked in the middle but I can look past that given its a little more unusual than the typical All American Five receiver.
Being over fifty years old I wonder what this radio has been used to listen to and what stories it could tell. Perhaps it gave some youngster his or her first taste of ham radio, listening to shortwave stations and AM QSOs until they received the final demand to, "Switch that radio off and GO TO BED!"
Philco Tropic 3012 |
What prompted me to bid on this particular radio was the inclusion of two shortwave bands in addition to the typical AM broadcast band. The dials are marked off in meters which also appealed to the ham radio side of my interests.
After attaching a short length of wire as an antenna I was able to pick up signals across the two SW1 & SW2 bands so I'll be interested to see what it can receive with a long wire antenna at night.
After a gentle cleaning with dilute mild detergent to remove dirt I rubbed in some beeswax polish to restore the original gloss. Sadly the plastic dial is cracked in the middle but I can look past that given its a little more unusual than the typical All American Five receiver.
Being over fifty years old I wonder what this radio has been used to listen to and what stories it could tell. Perhaps it gave some youngster his or her first taste of ham radio, listening to shortwave stations and AM QSOs until they received the final demand to, "Switch that radio off and GO TO BED!"
Labels:
1950's,
AmateurRadio.com,
old time radio,
philco,
Vacuum tube,
Valve,
vintage
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