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[AA3R]

Basically, how would you connect this unit between an Ameritron 811 and an Icom 7300...I know it's not needed but still, I like to be extra safe.
73

[K1VSK]

Are you looking for comments or do you have a Question?

My question is - why buy it if you don’t need it? It’s a simple matter to determine if it serves any purpose.

[AA3R]

Are you looking for comments or do you have a Question?

It's a question, I actually got one for free

[KM1H]

Basically, how would you connect this unit between an Ameritron 811 and an Icom 7300...I know it's not needed but still, I like to be extra safe.
73

In that case dont use it, something less to break

[AA3R]

Basically, how would you connect this unit between an Ameritron 811 and an Icom 7300...I know it's not needed but still, I like to be extra safe.
73

In that case dont use it, something less to break

Which brings to the question: How do you hook it up?
I have scoured the web to mo avail...sent MFJ a msg that has not been answered

[KM1H]

There is a goesinto and a goesoutta, doesnt matter which. 

https://www.mfjenterprises.com/support.php?productid=MFJ-704

[K1VSK]

I have scoured the web to mo avail...sent MFJ a msg that has not been answered

You might try re-“scouring”  for MFJ 704 instruction manual. It’s widely available on a number of web sites as a downloadable PDF.

Hint - Between output and antenna

[W0CKI]

Easy to find and easy to use between amp and antenna. If you don't need it don't use it.
73 Gary W0CKI

[AE0Q]

Basically, how would you connect this unit between an Ameritron 811 and an Icom 7300...I know it's not needed but still, I like to be extra safe. 73

If the original poster thinks this goes between radio and amp, then I would suspect maybe it is the ARB-704 amp keying interface, not a low pass filter??

[AA3R]

Sorry, it's the ARB 704 ....I found said instructions
73

[KM1H]

Now he tells us.

Toss it as they have reliability problems and are certainly not needed for that amp anyway.

[W0CKI]

Not needed and not very good, lose it.
Gary W0CKI

[K0UA]

As a new AL811H owner and the owner of two IC-7300's, I can assure you that you don't need or want a keyline interface for these amps/radios.

[N4MU]

Couple years ago when I was just setting up at my current QTH I bought one to use between xcvr and my ALS-600. After a few days...and some frustration I removed it and returned it to the vendor with a, "Why in H did I buy this useless thing"? I'm sure there are some circumstances where it might be desirable but I certainly didn't...still don't... need it. Consider: It was free. That should have told you something.