[Heathkit] SB-110 vs SB-110A

[Gary H. Harmon, Jr.]

Looks like all three of mine are the A model in spite of none have the series plate yet found.

One is missing the slide switch on the back, needs repairs on the back due to the lame installation of a normal coax connector, and restringing of the main dial assembly and the load capacitor.  The RF deck cover is also missing.

Three good projects.

GREAT book Chuck.  I retired the previous one and have the new one right beside me.

Thanks all for the comments.

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

-----Original Message-----
From: wa7zze at gmail.com [mailto:wa7zze at gmail.com] 
Sent: Tuesday, September 28, 2021 12:02 PM
To: Bob, WB2VUF
Cc: Gary H. Harmon, Jr.; heathkit at mailman.qth.net
Subject: Re: [Heathkit] SB-110 vs SB-110A

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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>> 
>> List Administrator: Gary Harmon, K5JWK
>> ** For Assistance: gharmon at idworld.net **
>> 
>> 
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> 
> 
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