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Beware of this hack job.
- Thread starter Rick Hicks
- Start date
Yep flap toppin over modulated swing the meter look at her go hack job for sure lol.
73's
73's
That scope waveform is just plain fugly.
"Fugly" I was uncertain of the term until I found it in the Urban Dictionary. Just as I suspected...
That hack job was performed on a Galaxy DX99V by "DOG" at JJ's Electronics in 2012 and he called it a "Super Mod". Super muck up would be what I call it
Shadetree Mechanic
Delaware Base Station 808
Wow, maybe it was set up for a noise canceling unpowered microphone held at arm's length?
I was thinking more like 'bugly' or 'butt ugly'
But fugly will do . . .
It wouldn't be much better. The negative peaks are nowhere near 100% and the positives are flat topping. Just a really bad hack job.
Shadetree Mechanic
Delaware Base Station 808
Ok that makes sense that the negative isn't pinching. The distortion is peak to peak. If it were audio or modulation related, I would expect the distortion to be more symmetrical. Is it safe to assume that the clipping is in the RF amplification somewhere? Just trying to learn.
This is just a guess based on mods that I've tried and didn't like. It looks like the finals are just out of headroom or poor tuning is causing the positive peaks to flat top.
I tried volting the final on a 148 and saw similar negative peaks. Mine were squared off but not close to baseline. I think this is because the unmodulated 12 volts being put on the collector of the final. It made more pep power but the waveform looked bad.
The same thing happens with the 3 diode keep alive circuit that can be used in a cobra 29. The same circuit was used in plate modulated transmitters. It was called ultra modulation in an issue of qst from the 1950s. It's not a bad idea when used in moderation.
I thought Halloween had come and gone.
That's the ghost of Billy in that radio.
As in Billy Dean Ward, alias "Radio Doctor". Looks like his "NPC/RC" mod.
Always considered it to be snake oil. Some folks say they like it.
Some folks drink Jaegermeister and say they like it. I call it Vicks Formula 44.
73
That's the ghost of Billy in that radio.
As in Billy Dean Ward, alias "Radio Doctor". Looks like his "NPC/RC" mod.
Always considered it to be snake oil. Some folks say they like it.
Some folks drink Jaegermeister and say they like it. I call it Vicks Formula 44.
73
That's not totally terrible if you take the time to figure the correct resistor value to keep it from making a wonky pattern on a scope.
As a kid, I liked the black Formula 44D, hahaha, maybe I'm just a sick little monkey...
Just always remember guys, it's not about you - it's about the consumer. Did Joe Dirt not teach us anything?
As a kid, I liked the black Formula 44D, hahaha, maybe I'm just a sick little monkey...
Just always remember guys, it's not about you - it's about the consumer. Did Joe Dirt not teach us anything?
There's Chop ! You been quiet lately . Shop must be busy ?
It has been fairly busy lately but the regular 9-5 has been more of a thorn than anything else.