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Message |
    
Tomcatinva
Junior Member
Username: Tomcatinva
Post Number: 43
Registered: 11-2003
| | Posted on Monday, May 16, 2005 - 8:54 am: | 
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I have a couple of questions for the Techs out there…
First a radio question, on my new Magnum 257 when I adjust the variable power I can see the difference on the meter from max. power (full clockwise) to min. power (full counter clockwise) when I key up the mic. However on my older 257 it never changes, the meter still shows max power after I turn the variable power full counter clockwise.
Second a Amp question, What kind of power do you get out of a two pill amp with the markings on the pills are SO1446? I did see some other markings of 252H on one of the pills and 235S on the other, they also have a manufacture logo of (what it looked like) either ATJ or AIJ. The old eyes just couldn't make out the markings exactly…
Any help would be wonderful…
Thanks,
TomCat in VA CEF217... |
Bruce
Senior Member
Username: Bruce
Post Number: 2600
Registered: 9-2003
| | Posted on Monday, May 16, 2005 - 10:15 am: |
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CLEAN OUTPUT about 100 watts max output about 150 |
Tomcatinva
Junior Member
Username: Tomcatinva
Post Number: 44
Registered: 11-2003
| | Posted on Monday, May 16, 2005 - 1:31 pm: |
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Thanks Bruce.
Which numbers tell you that, is it the "SO1446"? Also anything about the Magnum power meter control question?
TomCat in Va CEF217 |
Bruce
Senior Member
Username: Bruce
Post Number: 2605
Registered: 9-2003
| | Posted on Monday, May 16, 2005 - 2:03 pm: |
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the 1446 is good for about 70 watts each MAX! it's a common transistor. |
Tomcatinva
Junior Member
Username: Tomcatinva
Post Number: 45
Registered: 11-2003
| | Posted on Tuesday, May 17, 2005 - 5:28 pm: |
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Bruce, do you think that my variable power control on the older Mag 257 might be loose or not working right, if I don't notice the meter change when I key up and turn the power down? Maybe a cold solder joint??
Thanks,
TomCat in Va CEF217 |
Bruce
Senior Member
Username: Bruce
Post Number: 2617
Registered: 9-2003
| | Posted on Tuesday, May 17, 2005 - 7:36 pm: |
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Hummmmm? I will have to check......... |
Bigbob
Senior Member
Username: Bigbob
Post Number: 1915
Registered: 12-2001
| | Posted on Tuesday, May 17, 2005 - 8:24 pm: |
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Bruce,the sd1446 AT 50MHZ IS 70 WATTS,AT 27MHZ IT IS 90 WATTS,BUT you're a 50 meg man any how and amps are illeagal on 27megs,so says RFPARTS,so say they all,hehe.Bigbob |
Bruce
Senior Member
Username: Bruce
Post Number: 2620
Registered: 9-2003
| | Posted on Wednesday, May 18, 2005 - 8:12 am: |
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Bigbob .....
There are 3 way to run amps ......
1) CCS = 90 at cb 70 at 6 meters
2) ICAS ( about ) 120 CB 100 6 meters
3) BBS This is NEW on the copper forum!
Bigbob wii get credit for this .... the MAX power output is = to the point at which the device MELTS - one degree. This is why they call it a 1446 ....... as in 1446 WATTS! I LIKE YOUR THINKING BOB ! ( LOL )
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Bigbob
Senior Member
Username: Bigbob
Post Number: 1916
Registered: 12-2001
| | Posted on Wednesday, May 18, 2005 - 5:59 pm: |
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I have heard the sd1446 is not much good below 21 megs because of difficulty in controlling occillation,that said, rfparts says to use low beta pills,but all I've ever seen is high beta,so these transistors are truly for a very narrow band of frecs.Bigbob |
Bruce
Senior Member
Username: Bruce
Post Number: 2624
Registered: 9-2003
| | Posted on Wednesday, May 18, 2005 - 6:29 pm: |
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Yep and there are more like them .... |
