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Re: [Amps] The SB220 Mystique

To: "Carl" <km1h@jeremy.mv.com>, "Lee Buller" <k0wa@swbell.net>, <amps@contesting.com>
Subject: Re: [Amps] The SB220 Mystique
From: "Steve Katz" <stevek@jmr.com>
Date: Tue, 10 Feb 2009 09:41:27 -0800
List-post: <amps@contesting.com">mailto:amps@contesting.com>
I never had any sort of TVI with my SB-220s over the years.

Sounds like that particular one had some sort of problem, like a VHF 
oscillation.

WB2WIK/6



-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com]On
Behalf Of Carl
Sent: Tuesday, February 10, 2009 9:29 AM
To: Lee Buller; amps@contesting.com
Subject: Re: [Amps] The SB220 Mystique


Price, huge quantity made, high survival rate, most repair parts readily 
available.

You dont get TVI with a good LPF.

Carl
KM1H




----- Original Message ----- 
From: "Lee Buller" <k0wa@swbell.net>
To: <amps@contesting.com>
Sent: Tuesday, February 10, 2009 11:19 AM
Subject: [Amps] The SB220 Mystique



A question for the "experts" on this list....

Why do people like the SB220 so much? What is it that makes this amp so 
"popular" because it has never been "popular" with me.

Yes, I have owned one SB220 and had it for 5 or 6 years...and then I've 
operated several others. I always thought they were TVI Generators. 
Using a Kenwood 820 or 830 or and 850 to drive it...the SB220 seemed to 
make TVI a standard ouput. I tried everything to make sure it was 
shielded right, grounded correctly, driven properly, Filters, etc...but 
alas and alack...I could never get it NOT to generate TVI.

Now, I understand the engineering that went into this amp. It is a 
classic, but for me when I got rid of it I rejoiced. I've operated an 
Alpha 76PA and 91B - Amertron AL80A and AL82 and never had a TVI 
problem.

The SB220 is going for way to high of price on Ebay. I am just wondering 
what all the "experts" say about this amp. I will not own one again, but 
I am curious as to the opinions.

Lee Buller
K0WA


In our day and age it seems that Common Sense is in short supply.  If 
you don't have any Common Sense - get some Common Sense and use it.  If 
you can't find any Common Sense, ask for help from somebody who has some 
Common Sense.  Is Common Sense divine?
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