[Amps] SB-200 Mods

[Carl]

For what benefit?  The amp on 160 is extremely stable and clean, why muck it 
up?

If someone is obsessed about QSK get an amp all ready to go or learn how to 
use VOX CW with  a fast relay or speed up circuit.



----- Original Message ----- 
From: "gudguyham via Amps" <amps at contesting.com>
To: "Jim" <jimw7ry at gmail.com>; <amps at contesting.com>
Sent: Thursday, January 28, 2021 8:03 AM
Subject: Re: [Amps] SB-200 Mods


> 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.
>
> Sent from the all new Aol app for iOS
>
>
> 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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