Quote:
Originally Posted by livewireless123
melts the solder
holding the can and the transistor assembly can be pulled out. (most times)
some are a bit reluctant.
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Yes, it is interesting that. I found the same thing, the occasional transistor the top was reluctant to separate. In the end I gave up on applying heat because I detected some changes on before and after tests that led me to believe the junction had been affected. Though obviously they would have soldered these at the factory without damage to the junction in the first place. So I went to the method of drilling a small hole and doing a washout, shown in the photos on this post:
https://www.vintage-radio.net/forum/...1&postcount=15
After a while though I concluded that the performance and reliability of the AF178 & others couldn't be beaten, so none of my radios have any of the repaired AF117's in them anymore, even though they would work ok.