[Amps] SB-200 Mods

[gudguyham]

Additionally if converting the SB200 to 160 mono band, this would be the ideal time to ground the grids and add the W7RY QSK mod.  This would add a whole new dimension to the process and make it a real killer amp on 160.   

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On Thursday, January 28, 2021, 7:30 AM, Jim <jimw7ry at gmail.com> wrote:

Absolutely agree Jeff and Lou.

Heathkit SB1000 or AL-80A is the way to go for multiband, (and warc) 
with 160. 160 only, then yes! Convert the SB200.


Thanks
73
Jim W7RY

On 1/28/2021 5:55 AM, gudguyham via Amps wrote:
> I agree with Jeff, adding 160 is just too much work and it would be a compromise at the end of the day.  You’ll end up spending more money and time than if you got your hands on a hacked 200 for CB or just one that suffered a band switch blow out.  Tear it apart and build it as a mono band 160 amp instead.  Now that will work perfectly and put out lots of power and it WON’T be a compromise!  I’ve been there done that.
>
>
> Sent from the all new Aol app for iOS
>
>
> On Wednesday, January 27, 2021, 11:55 PM, Jeff Blaine <KeepWalking188 at ac0c.com> wrote:
>
> I spent a bit of time on that amp a while back.  Involved a GI7B
> conversion but warc operation was part of the goal.  I forget which warc
> band it was that the plate choke is self resonant close too, but it's
> one of them.  You would need to treat it for that.
>
> My rationale for the project was to hone my construction, amp and design
> skills so the investment has some payback in perpetuity. The amp today
> sits on the shelf with a variety of problems, never to see RF again.
>
> In fact, given I did spend a massive amount of time and money on that
> project, in retrospect I have many times strongly recommend guys asking
> me about the project to just track down an AL80b (single tube 3-500z
> amp) instead.  The AL80b is about 10x the amp in just most other than
> sentimental respects.  And it's relatively easy to sell an unmodified
> SB-200 as well.
>
> 73/jeff/ac0c
> alpha-charlie-zero-charlie
> www.ac0c.com
>
>
> On 1/27/21 9:08 PM, Jim wrote:
>> And this was converting it to ONLY 160 meters. Not adding 160 to it.
>>
>>
>> If you search on SB200 160 meters, you will find many examples.
>>
>>
>> Thanks
>> 73
>> Jim W7RY
>>
>> On 1/27/2021 7:31 PM, Jim wrote:
>>> There was an article in one of the 60-70s arrl handbooks about a 160
>>> meter conversion to an SB200.
>>>
>>>
>>> Thanks
>>> 73
>>> Jim W7RY
>>> On 1/27/2021 3:56 PM, Jim Koshmider via Amps wrote:
>>>> Has anyone in the group modified an SB-200 for 160 meters, or for
>>>> the WARC bands?  Any info would be appreciated.
>>>> Thanks.
>>>> 73,
>>>> Jim,  K8OZ
>>>>
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