[Boatanchors] Linear Amps

[Glen Zook via Boatanchors]

Stay clear of the SB-230 because the conduction cooled tube in that linear is EXTREMELY expensive and they are no longer being manufactured.

None of the amplifiers referenced cover 160-meters.  

The SB-220 / SB-221 uses a pair of 3-500Z tubes and can be used on the WARC bands.  Good 3-500Z tubes are still available.

The SB-200 / SB-201 uses a pair of 572B tubes.  Getting good 572B tubes new these days is "spotty".  However, they are still available.

All the B&W linears use 813 tubes which are a very old tube although the tubes are pretty rugged.

The Hammarlund HXL uses, originally, 572A tubes which have been replaced with the 572B.

Both SB-200 / SB-201 and the SB-220 / SB-221 have a very good reputation and are, generally, very reliable.  Of course, one that has bad workmanship is going to require some work.  But, most of the Heath amplifiers were assembled relatively well.
 
Glen, K9STH


Website:  http://k9sth.com


On Sunday, July 20, 2014 4:48 PM, Rob Atkinson <ranchorobbo at gmail.com> wrote:
 


More info would be helpful such as what duty cycle you need to
sustain, and bands you want to cover.   Heathkit Warrior will sit
there and put out 500 watts all day 100% duty cycle.   But it is heavy
and I can't remember if it covers 160 m.   Stan, I'm surprised you
can't find an old broadcast rig, hi.

73

Rob
K5UJ


On Sun, Jul 20, 2014 at 3:39 PM, Stanley Adams via Boatanchors
<boatanchors at mailman.qth.net> wrote:
> Trying to decide on buying a linear amp.
> Don't have a ton of money, here is what I am looking at:
> SB-200
> SB-230
> SB-220
> Hammarlund HXL-One
> B&W Linear
>
> Pluses and minuses if you please and MAC in OKC are you still around?  If so
> send me a personal email, I am up in Tulsa and want to talk about ham stuff
> in OK.
> Thanks men
> Stanley B Adams
> Memphis, TN
> 901-373-7785
> stanleybadams at gmail.com
> I am changing e-mail accounts.  Please update your records.
> Thank you
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