Oh yeah, that is going to work well......
Been there, done that (accidently of course), the TS 350 only took one key down when I realized my mistake..... had DEI's in it, New Toshiba's were in order .....
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Texas Star 500V vs Davemade 4 Pill
- Thread starter weatherman
- Start date
Oh yeah, that is going to work well......
Been there, done that (accidently of course), the TS 350 only took one key down when I realized my mistake..... had DEI's in it, New Toshiba's were in order .....
Had one customer who had me install a red LED just inside the headphone jack. It's connected to the Suicide Switch. Lights up when the internal linear is active.
Had to give him credit for a good idea.
73
Had to give him credit for a good idea.
73
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I have occasionally run a 2970N2 in AM mode with the power turned down into a Heavy Duty real Toshiba 2sc2879 (4) pill box with surprisingly good results. With the AMP at a maximum 110-120 watts DK, that set up would swing nicely with the N2 in front of it. Not really much different than running a HD 2x4.
Would I run it this way all the time? Hell no, as the peaks were very high and I want my amps to last. Duty cycle, available amperage, supply voltage, proper heat sinking & cooling coupled with transistor quality all play a factor here. I would not recommend even trying this set up unless you had an HD box with the real dealeo Toshiba 2879s in it, haha. Magic smoke.
Would I run it this way all the time? Hell no, as the peaks were very high and I want my amps to last. Duty cycle, available amperage, supply voltage, proper heat sinking & cooling coupled with transistor quality all play a factor here. I would not recommend even trying this set up unless you had an HD box with the real dealeo Toshiba 2879s in it, haha. Magic smoke.
Not a good idea. Either buy more amp to match up to the power output of the 2970N2 or buy less radio to match up to the amp. Here goes a novel idea you could run the 2970N2 without a un-needed 4 bjt transistor amp behind it.
In a way I have the same issue on a smaller scale. I have a new 2950CD turned down to .5-4w on the dk front variable. But I have backswing on average power meter.
I was trying to drive my well loved Cobra 2x2879 but it seems to be and others have advised that its still to much radio for that amp. Will a TX Star 500 face the same issue or is my radio tame enough? I do use sideband so the class C stuff is out.
I was trying to drive my well loved Cobra 2x2879 but it seems to be and others have advised that its still to much radio for that amp. Will a TX Star 500 face the same issue or is my radio tame enough? I do use sideband so the class C stuff is out.
The 2950 CD should work fine as long as it has not been super duper tuned. By this I mean if say your radio dead keys 1.5 watts on AM and swings 10-18 watts it should be fine. If it swings out to 40plus watts from a low key then yea that's a problem. Same for SSB, if you can dial the radio down below 20 watts peak your Cobra amp should be fine. I bet even 8-12 watts SSB input would work well with that amp.
I tuned it myself fresh out of the box.
Or detuned rather I backed DK power way off and swing about 15 watts from 1 watt dk.
But I backswing out of the cobra on a brand new dosey test center on avg power. On peak setting great forward swing. Maybe the backswing is false? I dont know.
Or detuned rather I backed DK power way off and swing about 15 watts from 1 watt dk.
But I backswing out of the cobra on a brand new dosey test center on avg power. On peak setting great forward swing. Maybe the backswing is false? I dont know.
Shadetree Mechanic
Delaware Base Station 808
I realize I cant run it without destroying it. Its not a TX star that I own its a lovely blue face Cobra 350 2x original toshiba 2879s. I am not running it under those conditions. I was testing the new radio to see if I could and the answer is no as you all have pointed out. The Cobra 350 was from my boxes of stuff 20 years ago paired to a grant XL I sold. I'll have to get a 4 pill I guess the 2950 is too hot for it .
I use ssb as well so the class C stuff is out I assume. That leaves used stuff or TX STAR stuff I assume? I have been gone a long time I dont know who still builds AB 1 mobiles if anyone... Besides RM FET boxes and TX STAR?
I use ssb as well so the class C stuff is out I assume. That leaves used stuff or TX STAR stuff I assume? I have been gone a long time I dont know who still builds AB 1 mobiles if anyone... Besides RM FET boxes and TX STAR?
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Shadetree Mechanic
Delaware Base Station 808
There are a few builders around. Hopper Built and Carl Built come to mind. They can bias for side band too.
Carl. isn't he the original Xforce guy?
So class C can be half way ok on ssb?
I'm not into the overdriven splatterfest.
So class C can be half way ok on ssb?
I'm not into the overdriven splatterfest.
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Donkey Stomper will bias it as well. I blew my 1X4 on SSB and when I sent it in for repair, he added bias and she's ran great ever since.
Shadetree Mechanic
Delaware Base Station 808
These builders can bias AB as an option. I have an XForce 4 pill and a Carl Built 4 pill, both AB bias. The XForce on a Stryker 955 and the Carl on a President Madison. Both get good reports on AM and SSB.