Scantenna ST2 Matching Transformer

[webstar22]

Currently have one of these on the antenna

It's been up here for about 6 years now and I am thinking it's time for a new one. Anyone know of a place to get a heavy duty version?

 

[kb2vxa]

Pictured is an ordinary indoor TV balun undoubtedly waterlogged and corroded by now, the "heavy duty" one is the outdoor version so you can take it from there.

 

[FLRAILMAN]

Scanntenna ST2 matching transformer

Since you insist on a "real" heavy duty replacement matching transformer, this is what I found:

200-495 - Matching Transformer - Outdoor - Heavy Duty

However I've used the Radio Shack Model: 15-1140 Catalog#15-114 matching transformer for years without any complaint, the good thing is it's fully encapsulated in a very hard rubber casing. & includes a weather boot.

www.radioshack.com/product/index.jsp?productId=2103912

I hope this was of some help to you.

FLRAILMAN

 

[webstar22]

Ahh the heavy duty one is exactly what I am looking for.

Thank you.

 

[nanZor]

However I've used the Radio Shack Model: 15-1140 Catalog#15-114 matching transformer for years without any complaint, the good thing is it's fully encapsulated in a very hard rubber casing. & includes a weather boot.

I'm fond of those as well for antennas like the OCFD and others. The main thing I like is that inside it seems to have isolated transformer windings, whereas with some others, they share a common transformer ground, which can sometimes lead to ground problems.

I'll have to dig one up again to make sure that they are indeed isolated windings, rather than sharing a ground.

I've even heard of guys using them back-to-back as a kludge to make a simple isolation transformer. Not ideal, but what the heck.

Grab a few and replace them every few years.

 

[kb2vxa]

What you're talking about here is the difference between a voltage balun in which the input and output windings share DC continuity while those in a current balun do not. Just because there is DC continuity doesn't mean they have a common ground, there is no RF ground on the balanced side of it, that's what makes it balanced. BAL-UN, balanced, unbalanced RF wise.