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Mosfets and "power" claims
- Thread starter Two Pack
- Start date
he told me he has some company that is making them for him and he buy's over 100 at a time. a guy on ebay is selling some that look just like what I bought from redlight.
here is link from ebay that the people buying them say they work. all I can tell you is the ones I bought work just great. I have used 2 so far and they put out a little more than the stock ones, about 2 watts more.
https://www.ebay.com/itm/2SC1969-NP...e=STRK:MEBIDX:IT&_trksid=p2055119.m1438.l2649
here is link from ebay that the people buying them say they work. all I can tell you is the ones I bought work just great. I have used 2 so far and they put out a little more than the stock ones, about 2 watts more.
https://www.ebay.com/itm/2SC1969-NP...e=STRK:MEBIDX:IT&_trksid=p2055119.m1438.l2649
If something sounds too good to be true.....99.9% of the time, it is.
Why take a chance, RF parts has genuine 2SC1969 transistors for $16.95.
The extra cost is well worth it.
Why put $4 Chinese made oil filters on your car, when you can buy OEM filters for $6-$7.....basically the same concept.
The extra cost is well worth it.
Why put $4 Chinese made oil filters on your car, when you can buy OEM filters for $6-$7.....basically the same concept.
Put your money in a good antenna rather than sketchy mods to FET's.
The mods are for replacement of rare parts not mo' watts. If you want extra watts get an amp.
The mods are for replacement of rare parts not mo' watts. If you want extra watts get an amp.
Difference between a 500 watt amp and a 20,000 watt amp is about 2 s units.
That might be the difference between a 3 element and a 6 element beam.
That might be the difference between a 3 element and a 6 element beam.
Every radio tunes differently. Some radios you can drop a mosfet into and get 35+ watts. Others might have little to no increase in wattage, even if its the same model radio. If your radio has lower wattage, a lot more time and effort has to be put into tuning the "Pi network" and there is no internet tech that has the magic capacitor combo.
Only reason to go mosfet is your factory finals is toast.
Only reason to go mosfet is your factory finals is toast.
Well if that customer knew how poorly non-rf mosfets do with any SWR over 1.3:1 say 1.5:1 or 2:1 they would spend the extra money for a BJT. None of the mosfets used in CB radio's are rated at any phase angle let alone all phase angles for swr mismatch. The bench time is not worth it if you have to replace the final again in anything less than 10 years down the road. Many radio's have the same BJT final for over 20 years no problem often 30 to 40 years with constant usage. I got hardcore in CB in 1990 and have never blown a final in a radio or a bjt in an amplifier NEVER. I also check my swr when I power on a radio always! I do not drive my gear hard either. After you have depreciated out the gear it is paying you to take care of it and continue to use it. The money you save not having to send it out and not having to buy parts for it regular is money that can be applied to other things wine, women, car's, rifles, investments for retirement.
Everything has an opportunity cost and if you are constantly dumping money into junk parts or bench fee's etc then there will be something you must give up besides just the money. Since most people do not have passive income streams they are only making money when they are physically working. If you have to work more to pay more for you hobby what are you giving up? What else could you have done with those extra hours?
I am driving a 2003 Camry not because I can not afford a new vehicle but because their is nothing wrong with it and it has been paid off since 2006. Other than 2 sets of brake pads, 4 sets of tire a few air filters, 1 set of spark plugs and a lot of oil and gas it has until recently no cost me much to keep it. In fact it has only had one replacement belt and tensioner and 1 battery. I need to put new rear struts on it and a new throw-out bearing and I am going to do some minor body work and repaint it soon too! It is as if the car has been paying me to keep it. The same thing is true for electronics if you maintain them and repair them properly when they break it is as if they are paying you to keep it.
The only people that truly benefit from MOSFET conversions are repair tech.'s wanting a greater profit margin. If the customer does not want to put the proper part in and pay for it fine let him buy another radio. The bench time to trouble shoot and replace the final will far exceed the price of the proper part while they are still available! I do not have time for people that are penny wise and pound foolish! I would not want those types as customers either because they will beat you over the head if anything goes wrong and they will bad mouth you too 500 people it the repair does not hold up!
I am guessing you do not educate the customer on the short comings of installing a mosfet that is not rated for rf production into the radio.
I would suspect the real problem is that you can not get a bjt at a price point that will allow you mark it up and still sell the job. If you get the parts in bulk you can get them down to under $0.50 per fet and you can mark it up to $5, $10, $15 no problem. If you bought a real Mitsubishi 2SC1969 at full retail pricing from a reputable source your cost could be as high as $17 and if you are pushing rice boxes then you will need 2 of them matched at $40 if you tried to mark those up much no one would pay you to replace them once you add in any mandatory minimum bench time in and shop supplies etc. If the customer knew in advance the pro's and con's of not replacing it with like device I would not have a problem with it but that is seldom the case now is it?!?! I know becasue when I mentioned the low gain, durability issues, no-documentation from the manufacture to use the device for rf production, etc......people on this sight looked at me like a deer caught int he headlights because no mentioned these things before!
A lot of the so called repair technicians are almost as bad as the large pharmaceutical companies with regard to selective information to guarantee a nice profit margin for them. It not much different than how all the amp builders are up to their eyeballs doing repairs so much so that a lot of them are sacrificing new production to handle repairs. If they made a decent product then they would not profit as much as they do from doing repair work! It is in their best interest to use cheap parts and design that are designed to fail! After all it works for Apple after all!
After all if you told people you where paying less than $0.50 a part and that they freq. fail and had no gain who would take you up on using these parts? Oh and lets not forgot the fact that they can not handle much swr mismatch at all. Bearing in mind that more people than ever in history are using poorly maintained and built magnet mount antenna's!