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#31
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FM radio reception at ~24MHz?
On Fri, 21 Mar 2014, dxAce wrote:
My first was a Hallicrafters S-53A. And a not so long random wire. That was shortly followed up with a Hammarlund Super Pro (Mil designation BC-794.) It was my grandfather's amateur radio receiver. Still have it. And a not so recently acquired S-53. What's the S-53? Just Google "s-53 radio" and you'll soon find out. Except now that there was actually a thread with conversation on topic here, I thought I'd ask. I can look it up, but I wanted to see what Peter said. This newsgroup really went downhill in the days of "RHF" with his continuous spew of links to elsewhere, the only way it recovers is if people actually talk about things relevant to shortwave here, rather than constantly sending people elsewhere. Michael |
#32
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FM radio reception at ~24MHz?
On Friday, March 21, 2014 7:35:41 PM UTC-4, Michael Black wrote:
On Fri, 21 Mar 2014, dxAce wrote: My first was a Hallicrafters S-53A. And a not so long random wire. That was shortly followed up with a Hammarlund Super Pro (Mil designation BC-794.) It was my grandfather's amateur radio receiver. Still have it. And a not so recently acquired S-53. What's the S-53? Just Google "s-53 radio" and you'll soon find out. Except now that there was actually a thread with conversation on topic here, I thought I'd ask. I can look it up, but I wanted to see what Peter said. This newsgroup really went downhill in the days of "RHF" with his continuous spew of links to elsewhere, the only way it recovers is if people actually talk about things relevant to shortwave here, rather than constantly sending people elsewhere. Michael Somebody obviously must have sent RHF to a faraway place! He didn't make any postings in a long time. |
#33
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FM radio reception at ~24MHz?
On 3/21/14 18:35 , Michael Black wrote:
My first was a Hallicrafters S-53A. And a not so long random wire. That was shortly followed up with a Hammarlund Super Pro (Mil designation BC-794.) It was my grandfather's amateur radio receiver. Still have it. And a not so recently acquired S-53. What's the S-53? Actually it's an S-53A. 550khz-54Mhz, 8 tube, fixed BFO, Noise limiter (such that it was), electrical bandspread, sliderule dial. Much more than an S-38. A bit wide, but nice audio. Phono input. There was something about hearing a Cardinals' game that was unique. Much more fun than listening on a transistor. It dated from 1950-58. Typical Halli construction. About the same size as S-38. The differences between S-53 and S53A were the power transformer and the IF cans. "A" was a 120v transformer, and minature cans. Non-"A" models had universal power transformer, and full sized cans. It takes either a random wire against a ground, or a ladder line with a ground. Like the Hammarlund, it's got more sensitivity than can actually be used, and a decent, if not exemplary noise floor, so during the 60's and 70s, with the lower ambient noise and plethora of booming signals, there was LOT to listen to with a simple wire. Today, with a random wire on an Un-Un, or a shielded loop, it's decent. But the lack of signals make things a lot less fun. |
#34
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FM radio reception at ~24MHz?
On 03/24/2014 09:15 AM, D. Peter Maus wrote:
On 3/21/14 18:35 , Michael Black wrote: My first was a Hallicrafters S-53A. And a not so long random wire. That was shortly followed up with a Hammarlund Super Pro (Mil designation BC-794.) It was my grandfather's amateur radio receiver. Still have it. And a not so recently acquired S-53. What's the S-53? Actually it's an S-53A. 550khz-54Mhz, 8 tube, fixed BFO, Noise limiter (such that it was), electrical bandspread, sliderule dial. Much more than an S-38. A bit wide, but nice audio. Phono input. There was something about hearing a Cardinals' game that was unique. Much more fun than listening on a transistor. It dated from 1950-58. Typical Halli construction. About the same size as S-38. The differences between S-53 and S53A were the power transformer and the IF cans. "A" was a 120v transformer, and minature cans. Non-"A" models had universal power transformer, and full sized cans. It takes either a random wire against a ground, or a ladder line with a ground. Like the Hammarlund, it's got more sensitivity than can actually be used, and a decent, if not exemplary noise floor, so during the 60's and 70s, with the lower ambient noise and plethora of booming signals, there was LOT to listen to with a simple wire. Today, with a random wire on an Un-Un, or a shielded loop, it's decent. But the lack of signals make things a lot less fun. Noise limiters in 1950 were clipper diodes, same exact principle today. Just like 1n914s on the output of your STL to keep the Overmodulation lamp from going off. |
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