Until Huagao, all 1969 clones were bad. I did not see one that worked, nor heard of one that worked. Maybe there were good ones, but I I have not come across a good one until Huagao. They would blow after being keyed up once or twice or at a max of three times. Just terrible.
Huagao is now making good 1969 replacements. Quite reasonable pricing. There is no other source that I can find for these transistors, no longer made by original manufacturer.
They also make other replacements including the elusive MRF 485, which I have not tried.
And to think I did all those MOSFET conversions... no longer necessary