[Heathkit] SB-110 vs SB-110A

[wa7zze at gmail.com]

The new edition contains chassis photos that show the differences, if the series plate is missing or unreadable. 

Chuck / WA7ZZE 

"Remain open to the possibility of the fantastic." -- Terry Hansen

> On Sep 28, 2021, at 8:49 AM, Bob, WB2VUF via Heathkit <heathkit at mailman.qth.net> wrote:
> 
> Gary:
> 
> According to Penson's 1995 book:
> 
> Differences between the SB-110 and SB-110A are:
> 
> * Improved bypassing and filtering
> * Improved LMO
> * The changes were made to prevent the heterodyne oscillator from
>   radiating, which caused TVI on channel 6, even in receive mode.
> 
> The only easy way to tell which version you have is by looking at the blue and white label on the LMO or on the rear panel or by checking the assembly manual cover for the model number, assuming you have the original manual that came with the unit.
> 
> 73,
> 
> Bob WB2VUF
> 
> 
> 
>> On 9/27/2021 7:29 PM, Gary H. Harmon, Jr. wrote:
>> I had but misplaced the ways to tell the difference.  Anyone have them
>> handy?
>> 
>>  
>> Best 73,
>> 
>>  
>> Gary H. Harmon, Jr. - K5JWK
>> 
>> HAM Radio, HEATHKIT, and ATARI Archaeologist
>> 
>> 6003 Archwood
>> 
>> San Antonio, TX 78239-1504
>> 
>> (210) 657-1549 <home>
>> 
>> (210) 884-6926 <cell and text>
>> 
>> gharmon at idworld.net
>> 
>>  
>> "Retirement = Every day is a Saturday except Sunday"
>> 
>> "Real radios glow in the dark"
>> 
>> "Too many projects, not enough time"
>> 
>>  
>> http://www.grissomroadcoc.org
>> 
>>  
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> 
> 
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