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week old rci 2970n2 started smoking at the back of it
- Thread starter boxcar112
- Start date
DXman
Yes, that's 3100 degrees F. Nine yrs of hard work.
Ahhh yes - good old Dodge Dart!
Drove one through a Alaska winter one year (1977) and it sure served me well.
It surely was a not a fast machine, for my girlfriend's VW Super Beetle could out run it - even when I had a 15 mph start!!! :
:laugh::laugh:
Drove one through a Alaska winter one year (1977) and it sure served me well.
It surely was a not a fast machine, for my girlfriend's VW Super Beetle could out run it - even when I had a 15 mph start!!! :
:laugh::laugh:
we went 10,000 miles on our oil change on our old dodge dart slant 6 back in the 70's
dad sold it or traded it in still running.
dad sold it or traded it in still running.
I recently did one of these for a local guy, that thing scared the crap outta me, the bias was set scary high,yeah it put down 'impressive' numbers on the meter, but it was all just fluff. anyway, I reset everything, and I mean everything to factory spec. guess what, it ran cooler, sounded clean and even though it only made 150 watts on SSB it got better reports than it did making 100,000 million billion trillion gizzillion watts. And you know what? I here the owner on the air pretty much every night, and I have yet to here a complaint. So don;t be so quick to blame the radio and the mosfets.
Most people make fun of the old Dodge Dart, but not this hemi powered grocery getter!
1968 Hemi Dart - YouTube
1968 Hemi Dart - YouTube
The bottom line with these new mosfet radios is that the tune specs must be closely adheared to. If not they will fail. Not to mention that the antennae swr must be as near perfect as can be as well.
the mosfets will not take the kind of abuse that there older bipolar conterparts will.
But, I can still the arguement as to why so many people are staying with the older radios with the bipolar transistors in them. It's the same Arguement when things transitioned from tubes to transistors. I myself are one of them.
Those cheap switching mosfets belong in those switching power supplys where they origionated from, and not in the final output sections of radios. Even though these older bipolar transistors were starting to be phased out, once the radio manufactures found out that they could use them and make them work margionally they hopped that train to save $$$ on thier production costs and keep the prices the same or even higher. Hence a higher profit margin. It was never about better performance...just all about $$$$. I say this with the realization that something had to replace those bipolar transistors in light of the bipolars becomming extinct.
Come to think of it, here is a good thought. If someone came up with those elleflow bipolar replacement transistors with internal ballasting that seem to work 95% of the time at spec or even better on occasion, Then why havent these radios manufactures followed suit? If they can engineer some of the most elebrate radios and computer software to date....why couldn't they engineer a transistor to replace the ones that went extinct? Interesting concept isn't it?
But nevertheless this has become the wave of the future and have to be delt with.
The older bipolar final radios will eventually slip into the Antique classification just as the tube equiptment has. But like so many other things such as this,
It is all a matter of personal taste to the individual.
the mosfets will not take the kind of abuse that there older bipolar conterparts will.
But, I can still the arguement as to why so many people are staying with the older radios with the bipolar transistors in them. It's the same Arguement when things transitioned from tubes to transistors. I myself are one of them.
Those cheap switching mosfets belong in those switching power supplys where they origionated from, and not in the final output sections of radios. Even though these older bipolar transistors were starting to be phased out, once the radio manufactures found out that they could use them and make them work margionally they hopped that train to save $$$ on thier production costs and keep the prices the same or even higher. Hence a higher profit margin. It was never about better performance...just all about $$$$. I say this with the realization that something had to replace those bipolar transistors in light of the bipolars becomming extinct.
Come to think of it, here is a good thought. If someone came up with those elleflow bipolar replacement transistors with internal ballasting that seem to work 95% of the time at spec or even better on occasion, Then why havent these radios manufactures followed suit? If they can engineer some of the most elebrate radios and computer software to date....why couldn't they engineer a transistor to replace the ones that went extinct? Interesting concept isn't it?
But nevertheless this has become the wave of the future and have to be delt with.
The older bipolar final radios will eventually slip into the Antique classification just as the tube equiptment has. But like so many other things such as this,
It is all a matter of personal taste to the individual.
