Preacherman modded 50 watt cobra 29  | | 
09-23-2008, 04:25 PM
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Quote:
Originally Posted by 74IN  DSB. | Actually DSBRC . Double sideband reduced carrier as opposed to the normal double sideband full carrier AM or double sideband suppressed carrier of TX'ing USB and LSB together at the same time. |
09-23-2008, 04:41 PM
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when they come into the shop here we just refer to them as "sparky's splatterboxes". you just wish they did 47W @ 27Mhz. but they don't. |
09-23-2008, 04:42 PM
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Quote:
Originally Posted by freecell when they come into the shop here we just refer to them as "sparky's splatterboxes". |   |
09-23-2008, 04:57 PM
|  | Senior Member | | Join Date: Jun 2008 Location: South Mississippi
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Quote:
Originally Posted by moleculo I can get a Cobra 29 to do 50 watts, or real close as measured on a Bird43P. I used to have video clips up that showed it with a spectrum analyzer video also. I've done this to several of Cobra 29's that I've owned. I don't have access to a spec analyzer anymore, but I do have a Bird43P on my bench. Maybe if I get time I'll hook it up to the bench and shoot a video... |
Anything off of 27 Mhz would show up on the spectrum analyzer I would think. Maybe the scale resolution is set to 1 Khz and there is just one big, wide peak? |
09-23-2008, 05:52 PM
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not hardly. harmonic tx power at 54 and 81Mhz. aren't going to be seen on the spectrum analyzer. nice try. make your power measurements with a scope and subtract that from 47W and you'll see how much of it isn't occurring at the fundamental. |
09-23-2008, 05:54 PM
|  | ...{}/_\{}... | | Join Date: Mar 2001
Posts: 3,507
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Quote:
Originally Posted by moleculo I can get a Cobra 29 to do 50 watts, or real close as measured on a Bird43P. I used to have video clips up that showed it with a spectrum analyzer video also. I've done this to several of Cobra 29's that I've owned. I don't have access to a spec analyzer anymore, but I do have a Bird43P on my bench. Maybe if I get time I'll hook it up to the bench and shoot a video... | If you do, please provide the friggin thing in focus.
This preacherman guy is some kind of electronics guru, can't even focus the camera while making a video, duhhhhhhh.
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09-23-2008, 06:11 PM
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Quote:
Originally Posted by Happy_Hamer If you do, please provide the friggin thing in focus.
This preacherman guy is some kind of electronics guru, can't even focus the camera while making a video, duhhhhhhh. | Oh thank goodness! I thought I needed a new pair of bifocals!  |
09-23-2008, 06:27 PM
| | Senior Member | | Join Date: Jun 2008 Location: South Mississippi
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Quote:
Originally Posted by freecell not hardly. harmonic tx power at 54 and 81Mhz. aren't going to be seen on the spectrum analyzer. nice try. make your power measurements with a scope and subtract that from 47W and you'll see how much of it isn't occurring at the fundamental. |
I was thinking more of spikes and trash up to a meg off. Maybe a filter in line with the wattmeter might show a difference? |
09-24-2008, 03:02 PM
|  | Chop | | Join Date: May 2008 Location: Rosepine, LA
Posts: 114
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Quote:
Originally Posted by freecell when they come into the shop here we just refer to them as "sparky's splatterboxes". you just wish they did 47W @ 27Mhz. but they don't. | i don't care what you say, sparky's does a great job on radios. have you ever even had sparky's do any work to your equipment? probably not. just feel like bad mouthing someone? the cobra 29 i had WOULD DO 47W ON FREQ.!! with very little bleed to adjacent channels, if any at all. i tested it thoroughly. al is a very honest guy, also. so, WHERE IS THE PROOF TO BACK BACK YOUR CLAIMS?
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09-24-2008, 03:38 PM
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If the 148GTL I have that Sparky did is any representation of his work I'm not impressed at all...
Can't say about Preacherman's work but typically speaking these guys come and go over the years, and they all sell the same "Snake Oil", only thing that changes is the Faces and names.... | | |
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