John et al-
Here's an excerpt from an earlier posting of mine, which relates to KT-34
This analysis does not include the losses in the balun - which can be
studied and analyzed by itself. For a great reference, see Jerry Sevick's
books, and WA2SRQ's posts on feedpoint baluns. As a side note, I
considered replacing the KLM balun in one of the earlier rebuilds.
There was nothing wrong with it, other than 'looking old'. I bought
a cheapo 200:50 ohm balun from another source - KLM price was high.
Being the enginurd type I am, I tested the two baluns on a network
analyzer at work. The KLM balun was superior by far, giving a
good 50 ohm match over the entire bandwidth. The aftermarket balun
was way off - like 25-30 ohms! So I put the 'old looking' balun back
up, and returned the replacement unit - no problems!
-Tony, K1KP, firstname.lastname@example.org
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