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#1
November 20th 07, 11:50 PM
posted to rec.radio.amateur.boatanchors
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DX-100
On 11/20/07 9:40 AM, in article u_E0j.588$r81.428@trndny05, "Edward
Knobloch" wrote: wrote: Look at QTH .com, HF radio / DX-100 he says it delivers 275 watts out into a 50 ohm load..I think that must be about 300 % efficient ..Extra class says that.. OHWELL.... He said 235W out, as visible on the Bird. He's got it dipped at 350mA, and if he solid-stated the HV rectifiers and gets say 1KV on the plates, it should be possible. (Granted, not for long until the 6146's give out.) It's a very handsome DX-100. 73, Ed Knobloch All BS aside, NO DX-100 ever made would or ever did do 235W out. |
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#2
November 21st 07, 04:12 AM
posted to rec.radio.amateur.boatanchors
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DX-100
Don Bowey wrote:
On 11/20/07 9:40 AM, in article u_E0j.588$r81.428@trndny05, "Edward Knobloch" wrote: wrote: Look at QTH .com, HF radio / DX-100 he says it delivers 275 watts out into a 50 ohm load..I think that must be about 300 % efficient ..Extra class says that.. OHWELL.... He said 235W out, as visible on the Bird. He's got it dipped at 350mA, and if he solid-stated the HV rectifiers and gets say 1KV on the plates, it should be possible. (Granted, not for long until the 6146's give out.) It's a very handsome DX-100. 73, Ed Knobloch Don Bowey wrote All BS aside, NO DX-100 ever made would or ever did do 235W out. Hi, I don't know what's under that DX-100's hood (perhaps a third 6146, per the mod appearing in the Yahoo Heathkit group archive, or a couple of big sweep tubes) I am just pointing out that the power output shown is consistent with the plate current shown, assuming the original HV transformer is used - no laws of physics are violated. I think a pair of 6146's +might+ be able to make 235W out using much higher than normal screen voltage, but only for a matter of minutes before tube failure. I'd interpret such high output on an unmodified DX-100 as a fault condition. 73, Ed Knobloch |
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