| Author |
Message |
    
Makitaman60
New member
Username: Makitaman60
Post Number: 9
Registered: 11-2004
| | Posted on Tuesday, December 21, 2004 - 3:36 pm: | 
|
I have a PS12K Power supply that the protection light comes on when a load is applied.I thought it would reset after awhile but it never happen.If anyone has had this problem before please fill me in.I would sure like to get it working again.
Thank's
Makitaman60 |
Ajm1571
New member
Username: Ajm1571
Post Number: 3
Registered: 12-2004
| | Posted on Tuesday, December 21, 2004 - 8:35 pm: |
|
hmmm that is weird. mine had a reset button in the back and all I had to do was push it and it reset itself. You may be tryin to put to big of a load on it. Other than that I am not sure.
Allen |
Yankee
Intermediate Member
Username: Yankee
Post Number: 353
Registered: 7-2003
| | Posted on Tuesday, December 21, 2004 - 8:59 pm: |
|
Depends on what you're using the supply for. The PS-12 only puts out about 9-10 amps. and not rated to run anything larger than a sideband radio transmiting at 12 watts legal power. Although it could be shorted. |
Kid_vicious
Member
Username: Kid_vicious
Post Number: 82
Registered: 9-2004
| | Posted on Tuesday, December 21, 2004 - 9:25 pm: |
|
i dont know about that yankee; most ssb base station power supplies only put out between 3 to 4 amps. and they run 12 watts out from the factory. i wonder if one of the techs would be kind enough to post the formula for the current requirement for a given wattage out.
matt
tech noteP=ExI
P=watts
E=volts
I=amps |
Jp1116
Member
Username: Jp1116
Post Number: 85
Registered: 5-2002
| | Posted on Wednesday, December 22, 2004 - 10:49 am: |
|
Have you checked your 2N3055 transistors yet? Not sure if you have the schematic so I sent it to you just in case. I've found these to be more of a problem in the small supplies than the regulator. Did you get any further on the 350Z? |
Yankee
Intermediate Member
Username: Yankee
Post Number: 354
Registered: 7-2003
| | Posted on Wednesday, December 22, 2004 - 11:57 am: |
|
Yes, but sideband mobiles most times have a 4 or 5 amp. inline fuse, therefore a 10 amp. power supply gives a 12 volt sideband rig enough head room to properly operate at it's full 12 watts. I just checked and My stock powered Uniden Grant XL with a Silver Eagle peaks 15 watts and draws around 5 1/2 amps. on maximum audio swing, and yes I checked the power draw with a volt/ohm meter. and my power supply has an amp. meter on it and is set at 14 volts output. |
Makitaman60
Junior Member
Username: Makitaman60
Post Number: 10
Registered: 11-2004
| | Posted on Wednesday, December 22, 2004 - 6:55 pm: |
|
There is no reset button,and the only load it takes to activate the protection light in the volt meter itself and I don't think it's pulling the kind of amperage that would be equal to any transmitting signal.Maybe a milliamp or two? |
Kid_vicious
Member
Username: Kid_vicious
Post Number: 86
Registered: 9-2004
| | Posted on Wednesday, December 22, 2004 - 11:34 pm: |
|
not to hijack the thread but does that equation mean that: 4 watts=13.8 volts (0.289855 amps)?
or, 4=13.8 x .289855
that just doesnt seem right to me. am i misinterpreting the formula?
matt |
Bruce
Senior Member
Username: Bruce
Post Number: 1920
Registered: 9-2003
| | Posted on Thursday, December 23, 2004 - 8:02 am: |
|
NO 4 WATTS IS NOT 4 WATTS POWER SUPPLY
You have to remember all the other transmitter stages which have to work as well as a class b stage is only going to be 50% efficent.
Better figure all that and times by 1.25 for a safety margin and your more like what you realy need. I run my grant LT on a 3 amp supply but safety sake it really needs a 5 amp. |
Kid_vicious
Member
Username: Kid_vicious
Post Number: 90
Registered: 9-2004
| | Posted on Saturday, December 25, 2004 - 7:28 pm: |
|
ok, that works as a general rule, but is there no conversion from amperage pulled from the power supply to wattage out of the transmitter? i would guess that anyone who has both a current reading power supply, an accurate wattmeter, and a variable power output on their radio could tell us the numbers. like, 4 watts out draws 3 amps, and 8 watts out draws 5 amps and so on.
just a radio geek's curiosity thats all!
merry christmas to all!
matt |
Usa2112
New member
Username: Usa2112
Post Number: 1
Registered: 2-2005
| | Posted on Saturday, February 12, 2005 - 9:20 pm: |
|
Ok then what is a good clean supply to run a Magnum S9 on,one that will run cool and not be labored ????? |
Kid_vicious
Intermediate Member
Username: Kid_vicious
Post Number: 215
Registered: 9-2004
| | Posted on Saturday, February 12, 2005 - 9:39 pm: |
|
use a 20 amp power supply. it will probably provide 17 amps continuous. that supply will be loafing when running an S9.
matt |
Tech808
Moderator
Username: Tech808
Post Number: 4833
Registered: 8-2002
| | Posted on Saturday, February 12, 2005 - 11:18 pm: |
|
Usa2112,
WELCOME TO THE COPPER FORUM!
Click on the link below and it should help you determine what size you need and always go a little larger.
Which Power Supply Do You Need?
Hope this help's,
Lon
Tech808
CEF808
N9OSN
PS: I am located about 120 Miles south of you in Bloomington, IL.  |
Pig040
Advanced Member
Username: Pig040
Post Number: 684
Registered: 7-2003
| | Posted on Sunday, February 13, 2005 - 11:19 am: |
|
ASTRON, best supplies I have ever had, never a problem whatsoever!
Rich |
Usa2112
New member
Username: Usa2112
Post Number: 3
Registered: 2-2005
| | Posted on Sunday, February 13, 2005 - 12:16 pm: |
|
Thanks for the PS tips and the welcome!!!Been out of it too long and my old 60 Amp Sears battery charger converted into a power supply died years ago so I can't power things as I used to back in the day of Texas Star 1200's warming yer feet under the shack table ya know what I meen? |
Usa2112
New member
Username: Usa2112
Post Number: 6
Registered: 2-2005
| | Posted on Sunday, February 13, 2005 - 2:38 pm: |
|
Ok just online-auctioned an Astron 25A,that should cover it and then some! God Bless that online-auction!!! |
Supertech1
Junior Member
Username: Supertech1
Post Number: 19
Registered: 1-2005
| | Posted on Monday, February 14, 2005 - 9:23 pm: |
|
here's a cheap and easy power supply: spin a 200 amp alternator(with built-in regulator) with a single phase electric compressor motor and use a small car battery for a buffer and WHA-LA!!..all the power you need for around 200 bucks(depending on witch junk yard you hit-up). I also built a gas powered version on an aluminum plate 5.5 hp briggs motor powers up 120 amp load at half throttle  and all portable...1500 watt inverter and my emergency generator is complete...again, less than 200 bucks. gotta love those alternators...if one burns out..just toss-in another one . a little noisy-I know- but it beats a blank. two or three stacked astron 70amp ps can cost 2-much for some people that need 150 amps or more in their radio shack...like me!!
********TUNE FOR MAXIMUM SMOKE********* |
