Author |
Message |
Ca346
| Posted on Saturday, August 16, 2003 - 1:12 am: |
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I'm new to this forum. Wish I had seen it sooner. I have a GALAXY 350, 4 stage amp. I have hooked it up to two different radio's and two different power supplies, but it takes sooo much amperage, I am unable to use it past 2 stages (about 125 Watts). Using an ICOM706IIG, turned down to 5 watts, I kept blowing the internal fuse on the amp. I couldn't get the ICOM down any lower. Using a President HR2510 (Lincoln) it drives the amp fine, but the amp takes so much current at stage 3 and 4, I could never put it in my pick-up truck. Anybody have any suggestions? CA346 |
Adshar64
| Posted on Saturday, August 16, 2003 - 6:13 am: |
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What are you using to power it now? and what amps are you talking? You can expect approx 10 amps per 100w. cheers |
Taz
| Posted on Saturday, August 16, 2003 - 8:09 am: |
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You need a bigger altenator. |
Ca346
| Posted on Saturday, August 16, 2003 - 2:03 pm: |
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Draws 10 amps for stage 1 at 75 Watts Draws 18 amps for stage 2 at 125Watts Draws 28 amps for stage 3 at 160Watts Draws 38-40 amps for stage 4 at 225Watts I have two Power supplies. The MFJ-4035 (35AMP) powers the radio's, and a Pyramid 46 (40AMP) powers the Galaxy 350 all alone. I have not put it into my pick-up yet because it draws so much current. And, I agree TAZ I will need a BIGGER alternator. Probably battery too. I was going to put it into a TOYOTA TACOMA 4cyl. |
Taz
| Posted on Saturday, August 16, 2003 - 6:37 pm: |
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That amp is pulling way way way to much current. Thats weird. Yes, a bigger alternator is required over the stock Toyota tacoma 4 banger, plus a bigger battery too. Taz |
Adshar64
| Posted on Sunday, August 17, 2003 - 2:51 am: |
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yep something def wrong get all your caps and finals checked. |
Kc0gxz
| Posted on Monday, August 18, 2003 - 6:13 pm: |
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Ca346 Stage 1 is pretty close to average. However, I wouldn't rely to much on what the amperage meters on the power supplys are telling you. I have a pair of stacked Pyramid 52s that I use in my shop for amplifier test/repair. Brand new out of the box, one of them gave me low amperage readings. The other appeared to be pretty close to a true reading. I also use a Pyramid 46 for radio test/repair. That one showed me high amperage readings out of the box. The way that power supplies are hammered out these days, I don't think much time is spent on the calibration of the cheap meters that the companys put on them. NONE of the 3 that I am using had correct voltage readings either. Inside of the supplies are "marked" variable resisters for calibration of the Voltage and Amperage meters. You can recalibrate the Volt meter against a known true digital voltage meter such as a Fluke. The Amperage meter can be checked/calibrated with a known amperage load put to the supply. But then, it is very possible that you just might have a troublesome amplifier on your hands. I would check the supply meters for calibration anyways. Rarely will you find any that are correct no matter the brand of power supply. The above is just a suggestion. Good luck and 73s Jeff, kc0gxz. |
Tech671
| Posted on Tuesday, August 19, 2003 - 5:47 am: |
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The 350 should have no more than 90w AM carrier on stage 4. If set like this amp draw would be in the 30-35 range. With 20w ssb drive the amp draw may be 40a on stage 4 for ssb use, this is normal. A 40a continuous supply should run it fine, and in the mobile powered from the batt both + and - with 8ga wire should run fine. |
Ca346
| Posted on Tuesday, September 02, 2003 - 4:30 pm: |
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Thank you to All: It's been an interesting list of responses to my question. I will check them ALL out eventually. This is such a great forum. I need to get my computer at the radio base station hooked up to the Internet so I don't have to run back and forth!! |
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