[ARC5] ARC-5/SCR-274-N IF Transformer Interchangeability Warning!

[D. Platt]

Gents,

In my trials and tribulations doing up the selectivity improvement mod, 
and dealing with 4-5 receivers on the bench, here, I have discovered 
some important information.  There are  differences between the ARC-5 
and SCR-274-N IF transformer sets.  Although they are schematically 
similar, I've discovered that all cats are not gray.  It looks as though 
the 1st IF transformers are, in fact, transferable with no issues.  The 
2nd and 3rd IF transformers /may/ be not!  It also may depend on the 
date of manufacture (after 1945).  So, beware when you try and swap 
transformers.  To tell the truth, I know I probably have swapped 2nd and 
3rd IFs between sets hare and nothing untoward happened (so far), but I 
can't recommend it to anyone else!  I caught this and the article will 
reflect the info for all to see.  The mod itself is fine.....

Jeep - K3HVG