[Elecraft] KSB2 Problem with Assembly

2012-08-01 Thread KC9QQ
I am currently in the process of assembly a KSB2 (REV E KSB2 PC Board) which
I purchased with my K2 in November 2011.  I am currently completing the
installation of the resistors on the back side of the board.  After I
completed installing the resistors I noticed that I had an extra 10K
resistor.  I then checked my inventory and it showed that I had inventoried
3 10K resistors versus the 2 called for in inventory sheet.  

Just to be safe I downloaded the latest manual and compared it to my manual. 
It lists an additional four resistors on the back of the board (R21, R22,
R23 and R24). 

I have two questions:

1.  Should I be concerned that these resistors are not on the Rev E board?

2.  What is the purpose of the additional resistors?

Thanks,

Fred, KC9QQ



--
View this message in context: 
http://elecraft.365791.n2.nabble.com/KSB2-Problem-with-Assembly-tp7560131.html
Sent from the Elecraft mailing list archive at Nabble.com.
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html


Re: [Elecraft] KSB2 Problem with Assembly

2012-08-01 Thread Don Wilhelm
Fred,

Look carefully, that new manual does not match your KSB2.  Yours has an 
SSM2165 Speech Compressor and the new one uses an SSM2166 - the added 
resistors support that new IC.

As far as the extra 10k resistor, one is supplied with every KSB2 for 
use as a bias resistor if needed.  It is listed in the parts list as a 
component on the front panel.

73,
Don W3FPR

On 8/1/2012 3:30 PM, KC9QQ wrote:
 I am currently in the process of assembly a KSB2 (REV E KSB2 PC Board) which
 I purchased with my K2 in November 2011.  I am currently completing the
 installation of the resistors on the back side of the board.  After I
 completed installing the resistors I noticed that I had an extra 10K
 resistor.  I then checked my inventory and it showed that I had inventoried
 3 10K resistors versus the 2 called for in inventory sheet.

 Just to be safe I downloaded the latest manual and compared it to my manual.
 It lists an additional four resistors on the back of the board (R21, R22,
 R23 and R24).

 I have two questions:

 1.  Should I be concerned that these resistors are not on the Rev E board?

 2.  What is the purpose of the additional resistors?



__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html