| Author |
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Wolverine
| | Posted on Thursday, February 20, 2003 - 4:36 am: | 
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I have a Boomer 400 Amp with 4 sd1446 pills. I was told that 2879 pills were dead key pills for maximum distance, and less swing. Where as the sd1446 pills were modulator pills (less distance maximum swing). I have personally seen at a break, an 8 pill 1446 beat a 16 pill 2879 amp. I don't know the brands of the 2 amps in question, but "Maul Dropper" (his handle) stated that his 8 pill was volted, and his modulation simply rode the carrier of the 2879 16 pill to win the trophy. How is this possible? I thought that sc2879 pills were rated to be the most powerful.Add to boot, Maul Dropper's opponent had 8 pills extra, volted or not. I'm quite sure someone on the forum has a viable explanation for this. The competition transmit distance was 25 miles. |
Tech671
| | Posted on Thursday, February 20, 2003 - 5:54 am: |
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The amplifier is only a part of an equation like that. Voltage, antenna(s), reflection, impedance, so many variables to test something with viable results in that manner.
The 2879 and 1446 "sound" no different on air when used in a similar configured amplifier. 2879s have nearly double the rms capability as the 1446. Nothing wrong with 1446s, just no comparison to 2879s. |
Sparkomatic
| | Posted on Thursday, February 20, 2003 - 7:29 am: |
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2879s are 120 watt trans
1446 are 70 watt trans
My 2879 transistor amps swing pretty impressively.
I've seen gray 150s beat Texas Star 667s......it's all about the antenna system. |
Znut
| | Posted on Thursday, February 20, 2003 - 10:14 am: |
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Too many variables! The smaller system may have been set up much better, antenna, modulation, etc.
2879's are capable of almost twice the wattage as 1446's. Also they can dissipate more heat, even though they run hotter than 1446's.
I do like the 1446's myself. They are freindly as far as current draw and heat. Which must mean they are fairly efficient. |
Crafter
| | Posted on Thursday, February 20, 2003 - 6:31 pm: |
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I have rode a carrier on channel 10 from channel 19 but I ran 2000 watts your modulation can ride anothers carrier I dont know how but it can. |
2600
| | Posted on Friday, February 21, 2003 - 12:05 am: |
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Kinda like changing pistons without making sure the rods, rings, crank and valves all match. Changing an amplifier from one transistor type to another is a RE-DESIGN, not just a tune-up.
If you really want to change them, you will only see a positive result when ALL the other parts wrapped around those "pills" properly match the NEW ones. The parts that matched the OLD transistors just won't be right for the new type number at least 99 times out of 100, maybe more.
If the labor to do this is free, buying the parts in small quantities will make the task cost only half what an amplifier that ALREADY does more power would cost. If you have to pay for the labor, changing the transistor type will almost certainly cost more DOLLARS PER WATT than buying a bigger box, and selling the old one, while it still works.
Look on the bright side. Solid-State RF amplifiers are cheaper per watt than ever.
73 |
Sparkomatic
| | Posted on Friday, February 21, 2003 - 9:22 am: |
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I could be wrong and I am quite often.........but I was under the impression that 2879 "Pills" are ideal for higher than normal volts 16+ and 1446s can't handle the high volts real well. |
2600
| | Posted on Saturday, February 22, 2003 - 11:46 pm: |
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If you are designing an amplifier from scratch, the 2879 is hard to beat. It's a tough cookie that will routinely deliver TWICE the power the factory specs claim, (in short bursts) and withstand the stress of being "volted" better than most any similar part. If designing an amplifier is your plan, it's a good, rugged choice. If you are REdesigning an amp by changing the transistors to a different type, ALL the other parts must be upgraded to match the new transistors AND the higher power levels.
73 |
Wolverine
| | Posted on Tuesday, February 25, 2003 - 5:28 am: |
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Okay, Okay,. You've all made some excellent points. I think I'll just stick with my 4 pill Boomer 400 (sd1446 pills). If I ever upgrade in the future, I'll just find find a super-talking 4 pill sc2879 amp. It's weird though, how can X-Force, and Magnaforce amps with the same let's say, 2 pill, 4 pill, 1 x 4 pill, and 2 x 4 configurations, as other amp manufacturers have, "SUCK" soooooo much current, compared to their competition. |
Tech671
| | Posted on Tuesday, February 25, 2003 - 11:56 pm: |
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Because they actually tell you the truth as to what current is necessary to run the amplifier efficiently/sufficiently. |
Czar
| | Posted on Wednesday, February 26, 2003 - 12:35 am: |
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MAAAAAAAAAAAAAAAAANNNNNNNNNNNNN,Just up-grade and don't worry about the amp !!!!!!
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Wolverine
| | Posted on Wednesday, February 26, 2003 - 3:03 am: |
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Thanks Tech 671. Now that's breaking down to the "Nitty Gritty". Not to mention all the adequate "Grounding" needed for "Maximum" current transfer for an excellent output RF signal. |
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