[Elecraft] KPA100 Final Transistor base resistance

[Don Wilhelm]

Kevin,

You are OK - check the Rev D manual and its errata sheet and you will find
the range has been changed to 11 to 16 ohms.

73,
Don W3FPR

> -----Original Message-----
>
> My daughter and I are slowly assembling a KPA100 Rev C.  We are at the
> alignment and installation resistance checks, and the bases of Q1 and Q2
> measure 11.4 ohms. The manual gives 12-16 ohms. Looking at the schematic,
> it seems that the resistance for Q2 base should be the resistance of R9
> (10 ohms) in series with the combination of R20 (1.6 ohms) in parallel
> with the series combination of R34 (10 ohms) and R19 (1.6 ohms). This
> works out to 11.4 ohms.  5 percent tolerances all working together might
> get this to 12 ohms, but its hard for me to see how anyone would ever
> get a resistance in the specified range.  Am I missing something or is
> the manual wrong?
>
> 73 Kevin w9cf
>
--
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.5.432 / Virus Database: 268.15.26/597 - Release Date: 12/21/2006
6:45 PM