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erf7530 mosfets

Discussion in 'Amplifiers' started by 9C1Driver, Feb 25, 2017.

  1. 9C1Driver

    9C1Driver
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    I guess these too have been discontinued so I have heard. Trying to find a place that still has some in stock so I can buy a couple to hang on to. I have two radio's with the RFX75 on them and I want to be able to get them fixed should I ever blow a final. Any help would be great.


     

  2. Robb

    Robb
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    Yup

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    You might try to contact Eric at RF Limited and ask him.
    They make those parts through their EKL mfr.
     
  3. binrat

    binrat
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    I think I got some hidden away, just in case. But I don't have anything for em...
     
  4. JoeDirt

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    I know the IRF520 work great in-place of the ERF2030's

    Look into the IRF530 to replace the ERF7530's, they can be had for around a $1 each. (havens personally tried them)
     
  5. Crusher

    Crusher
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    Haven't paid attention to these in a year or so, looks like they are non existent now. Guess I'll sit on the few I have left.
     
  6. loosecannon

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    i believe the IRF530 is still a TO-220 package.

    i've had my eye out for a while for a sub for the 7530, and haven't come up with anything, but then again, im no expert at reading these transistor datasheets either.
    LC
     
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  7. JoeDirt

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    I hear you with the data sheets....lol I couldn't find the 7530 data sheet to compare it too. They are both 70 watt To-220 transistors.

    I would be willing to bet there isnt much difference. The IRF transistors are not tested for use in a RF environment. I think the ERF transistors were tested/rated by RF Limited for RF use and quality control.
     
  8. Crusher

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    The erf7530 is in a TO-218 case. Much bigger than a to-220 case.
     
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  9. JoeDirt

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    Well then.... never mind........ :cautious:
     
  10. loosecannon

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    joedirt, im pretty sure you are thinking of the ERF2030 which is a TO-220 case style, and the generic equivalent (used in all the exports now) is the IRF520.

    it's that damn ERF7530 that no one seems to have any info on.
    well except maybe Eric Lewis, and he aint sayin nuttin.
    LC
     
  11. Crusher

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    You should look at eBay stuff. Some of the Chinese stuff is using some mosfet stuff that looks similar to erf7530. I bought some last year, but never did anything with.
     
  12. nomadradio

    nomadradio
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    Sounds like it's time for someone to figure out the original number that gets scraped off the 7530.

    EKL only markets the thing. They don't have a semiconductor factory any more than I do.

    Didn't mind paying his price for them when they were available. Just easier. But make no mistake, the 7530 is an industry-standard part originally meant for use as a switch, just like the IRF520/ERF2030.

    Trouble is, the published specs for all the commercial MOSFET types like this one are listed for use as a switching component, NOT as a RF amplifier.

    Time to take the last few 7530s and see if I can reverse-engineer the specs and come up with an OEM type number for the same part.

    Good chance that a part with that original number on it will sell for a buck or so max. But so far, nobody has revealed what number is on those parts before Eric's elves scrape it off and print "ERF7530" onto it.

    Wasn't worth my while to devote the labor to reverse-engineer what type number is getting scraped off, so long as I could buy them.

    But if the only way to get more is to figure it out, maybe someone will get a "round tuit".

    73
     
  13. Crusher

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  14. Crusher

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    They are dirt cheap too
     
  15. Robb

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    Yup

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