Dual KA230 Receiver alignment problem? Please help

The worst problem of smd is the size of them and usually they have 2 pins on one side and the pin 2 on the other.


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The worst problem of smd is the size of them and usually they have 2 pins on one side and the pin 2 on the other.


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The trick is to put a bit of solder on one pad, solder one lead of the part down while holding it with a tooth pick or similar, then solder the other leads. Put your pinkie down to steady your hand.
 
The varactors fail with age, so replacing with other used ones won't work. If you can't find new old stock, you have to find the datasheet for the originals and then find new diodes with the same or similar pF/Volt slope and range. Unfortunately most, if not all new varactors are surface mount parts, so you have to solder them in on the foil side of the board.


Could you help me ?

I couldn't find any smd similar to DD104?
Are there some restoration projects coming to dead ends?

How to solve this problems? When there's no replacements and only NOS components on Ebay, with probably the same age problems?

Carlos



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