Divide the SB-220 by two and add 160 = AL-80A/B, SB-1000.
73, k0cwo
> On Mar 26, 2015, at 10:31 PM, John Lyles <jtml@losalamos.com> wrote:
>
> The SB220 is considered by many to be a light to medium duty amplifier, as
> the cooling fan and the voltage doubler power supply cannot support operating
> those 3-500Z key down for significant time. I have one, but haven't seem them
> for $500 in a number of years.
>
> The Chippewa, unlike the later Warrior, was overbuilt from the start, having
> a separate HV power supply box as big as the PA section. It also had a real
> blower ducted through the two 4-400A chimneys. I have one of these also.
>
> I think the two Heathkits represent completely different design goals from
> the company. SB220 was an incredible deal for its capability, no doubt. If
> you just want RF power, and don't mind the limited duty factor, its a nice
> unit.
>
> 73
> John
> K5PRO
>
>
>> ------------------------------
> Message: 2
>> Date: Sun, 22 Mar 2015 08:35:09 -0700
>> From: Tom Osborne <w7why@frontier.com>
>> To: amps@contesting.com
>> Subject: Re: [Amps] Chippewa amplifier
>
>> Wow - $1000??
>> Be much better off to get a SB-220 for half that. 73
>> Tom W7WHY
>
>>> On 3/21/2015 10:58 PM, John Lyles wrote:
>>> On ebay, I saw a Chippewa model KL-1 without power supply, pair
>>> 4-400A, 1960:
>>>
>>> http://www.ebay.com/itm/Rare-Vintage-Heathkit-Tube-Linear-Amplifier-Chippewa-KL-1-for-Ham-Radio-/281630963209?pt=LH_DefaultDomain_0&hash=item4192837609
>
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