| Author |
Message |
    
Peddler
| | Posted on Saturday, May 26, 2001 - 10:18 pm: | 
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For a layman to understand. I have a D&A Maverick 250 and it works very well on AM. 275 to 300 watts on my meter with what I consider good foward swing.
My question is why will it seems not to unkey on SSB. I have to switch to standby and back each time I unkey the radio. I am driving this amp a little hard as far as some discussuins are concerned at about 4 to 6 wattswhich is my lowest setting for my Galaxy 2517 base.
A tech (not in my town,as no one in my town will work on tube type equipment and I have to drive a hundred miles one way) has modified or changed a capasiter to help the AM side. Beats me.
I'm not savy on electronics so I have to depend on what others tell me.
The amp works really well for me on AM and I would like the use of on SSB.
Thenks for any answer.
Jim |
307 (307)
| | Posted on Sunday, May 27, 2001 - 12:53 pm: |
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First of all , the amplifier SHOULD have a delay of about 1 or 2 seconds after you unkey the microphone on SSB. If it is staying "KEYED" on SSB it is not the capacitor , if the capacitor was shorted , it would no key at all. It sounds to me like the capacitor and or resistor that drains it slowly is most likely the problem area. Sometimes as age sets in , Capacitors change value. In this case I would have to guess by the way you described it , the resistor value has changed. Replace them both. |
kevin
| | Posted on Wednesday, July 11, 2001 - 6:48 pm: |
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I have a Maco 250 tube and the contacts started chattering and before I got it turned off it blowed the fuse I am scared to try it with a new fuse for further damaging the amp any info on this problem
2247 |
307 (307)
| | Posted on Thursday, July 12, 2001 - 6:18 am: |
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Chattering usually comes from two things (possible). 1) There is a tube shorted 2) There is a diode shorted in the power supply. There could be other things as well. I have seen it once or twice where the contacts on the relay were "pitted" and you may try resurfacing them with a finger nail file. |
KEN TAYLOR
| | Posted on Tuesday, July 24, 2001 - 9:41 pm: |
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I HAVE A 1200 TEXAS STAR LINEAR AND I WANT A BIGGER ONE.I WAS WONDERING ABOUT THE XFORCE?IS IT BIGGER?WHAT IS BIGGER AND WHERE CAN I GET ONE. |
Tech181 (Tech181)
| | Posted on Tuesday, July 24, 2001 - 11:46 pm: |
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Texas Star makes a 1600 model which uses eight 2SC2879's.
Steve
181 |
mike
| | Posted on Thursday, August 09, 2001 - 2:13 am: |
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dont waste your time with going from 1200 to 1600, u want to go over 2000 to notice a difference, in wattage there is jumps before u notice a difference. the first is 100w the next is 2000, and the next is like 500,000 somthing and so on to over a million watts plus! thats the way it is. i could run an antron with 1800 and another antron with 900 and u wouldnt notice a difference, maybe 1 or 2 s units. its just the way it is, sorry |
Anonymous
| | Posted on Saturday, August 11, 2001 - 9:27 pm: |
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You need to in theroy "double" your power to see a difference at the reciever end..ie: 100 watts you would have to go to 200. from 200 to 400 and from 400 to 800 ect. |
Jackaroo
| | Posted on Tuesday, January 15, 2002 - 8:13 am: |
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I want to know if a Yaesu-FL-2100Z amp will work OK on 11 meters or will it have to be modified? If it has to be modified what are they? Thanks. |
Bigbob
| | Posted on Tuesday, January 15, 2002 - 9:32 pm: |
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KEN TAYLOR,get an ARRL handbook they sometimes have plans for tube type RFamps.RF parts supplies tubes that can produce 20,000 watts EACH!!!!!!!! |
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