The cost effective solution for a couple hundred watts in the base that are biased, free of self oscillations and much cleaner that any solid state option really hasn't changed much in 40 years. I hate to say it but sweep tubes amps are still the way to go in this power range. Get on eBay and look for something with 2 to 4 sweep tubes. Pick a unit that uses tubes with a 12 pin base so you can still buy inexpensive substitutes like the 6LB6.
I don't mean to outright contradict another forum member but the very last option would be using a bunch of power supply MOSFETs in a base amplifier situation. That's about 10 times worse than using the Toshibas on an unregulated power supply since the transistors themselves contribute significantly to the amplifiers instability.
There is only one application in the world that even considers transistors like the ERF line for RF linear applications and that's CB. The manufacturer of these transistors has never been able to convince a single radio manufacturer outside of this market that the part was anything more than a switching transistor.
Confess what the off the shelf manufacturer part number was before you got them to restamp yours on it. That will be impossible because it's the only area they can make the profit in. Disguising the original 99 cent power supply transistor number and suggesting the same package is good to 70 watts at 30 MHz. To the one market that could ever be tricked into it.
If they were even close to a viable option the ERF line would have worked its way into every manufacturers least expensive 12 volt HF rigs. They could save between $50 and $100 in the final stage just in parts. Every one of the major equipment manufacturers struggles to keep the costs of their entry level rigs low in this competitive market. Let me know when ERF earns the trust of just one or even the chance to be considered.
I don't mean to outright contradict another forum member but the very last option would be using a bunch of power supply MOSFETs in a base amplifier situation. That's about 10 times worse than using the Toshibas on an unregulated power supply since the transistors themselves contribute significantly to the amplifiers instability.
There is only one application in the world that even considers transistors like the ERF line for RF linear applications and that's CB. The manufacturer of these transistors has never been able to convince a single radio manufacturer outside of this market that the part was anything more than a switching transistor.
Confess what the off the shelf manufacturer part number was before you got them to restamp yours on it. That will be impossible because it's the only area they can make the profit in. Disguising the original 99 cent power supply transistor number and suggesting the same package is good to 70 watts at 30 MHz. To the one market that could ever be tricked into it.
If they were even close to a viable option the ERF line would have worked its way into every manufacturers least expensive 12 volt HF rigs. They could save between $50 and $100 in the final stage just in parts. Every one of the major equipment manufacturers struggles to keep the costs of their entry level rigs low in this competitive market. Let me know when ERF earns the trust of just one or even the chance to be considered.
