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A forum for the discussion of matters of a technical nature. All such activities are undertaken at the readers discretion and own risk. If you don't know what you are doing, don't blame us if it all goes wrong!
- Posts: 2792
- Joined: 04 Apr 2008, 21:42
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Techquest wrote: ↑
31 May 2019, 14:01
Re ON Semi as Otter said they never made 477s or 455s in fact they don't make any RF transistors for the HF bands.
In fact, the fake MRF497s are actually MOSFETS as opposed to bipolar transistors, and they catch fire as soon as you apply power to the radio if you try to use them to replace a failed MRF477 in a Lincoln. I did try one, and got my money back.
Keep a look out for genuine MRF497s because they are a higher power rated version of the MRF477. Totally pin and circuit compatible.
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