I am going to run this radio with the amp sometimes. Now where should the rf power be on the radio. I will use it 99 percent of the time on SSB.
Thanks
Bobby
Thanks
Bobby
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2950cd and tx star 250
- Thread starter undertaker
- Start date
All the way down would be my recommendation. That radio is about twice the size this amplifier needs. Trying to see the same wattmeter numbers you get on AM will generally turn your audio to mud with a linear this size.
Or any size.
73
Or any size.
73
I have several Texas Star 250's Undertaker, great little amps. When I run my Delta Force on SSB I dial the power back to 8-10 watts and that is enough to drive the TS250 to it's peak output. You can drive more into it but the law of diminishing returns kicks in. For the handful of more watts you get the amp gets hot fast.
On AM I run the dead key at about 1.5 watts give or take 1/2 a watt and whatever the radio peaks at, like 14-20 watts. I try to keep the amps dead key in the 40-60 watt range.
As with most amplifiers many people have a false assumption that if it has HD stamped on it you can dead key 6-10 watts into it and drive 30-40 watts peak. All that does with a Texas Star is burn up the variable pot, knock the keying transistor out, and shorten the life of the very expensive finals.
On AM I run the dead key at about 1.5 watts give or take 1/2 a watt and whatever the radio peaks at, like 14-20 watts. I try to keep the amps dead key in the 40-60 watt range.
As with most amplifiers many people have a false assumption that if it has HD stamped on it you can dead key 6-10 watts into it and drive 30-40 watts peak. All that does with a Texas Star is burn up the variable pot, knock the keying transistor out, and shorten the life of the very expensive finals.
Back in the day a customer would ask what does "HD" mean on his amplifier.
I replied that it means two things:
1) "We know you wanted to see this, so we printed it on the front."
--or--
2) Please blow it up and come back for another one.
Soon.
73
I replied that it means two things:
1) "We know you wanted to see this, so we printed it on the front."
--or--
2) Please blow it up and come back for another one.
Soon.
73
A few years back at the peak of the last cycle I ran a 2950dx w a texas star "killer bee" 250. 2x 2290s. I mostly ran ssb but did occasionally talk with the locals on AM. The 2950 only had an alignment and a slight tune..(limiter still in place). With an astatic 636 and a 108 stainless whip ball mounted to my old rust bucket 94 honda. This was the best setup mobile I ever had. At the time I worked 12 miles east of my qth. The drive to work in the morning was full of working all over Europe and the ride home was no problem working Australia NZ, Hawaii. Even got lucky one evening facing west and worked Japan for the 1st time on 11m.. I always ran rf power all the way down on AM. If I remember correctly I set it about half way up or 1-2 o'clock for SSB. Ran mic gain wide open. I wasn't dropping the mall on ch6... but... for working the world ssb with good conditions....it rocked.