[Elecraft] Upgrading K3

[Victor Rosenthal 4X6GP]

Wouldn't the new subrx also have to have the extra preamp to match the 
one in the KXV3B?

73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/
On 24 Jun 2017 02:54, Don Wilhelm wrote:
> I believe it has to do with reducing low frequency noise on the 8 volt 
> line.
> 
> The addition of the capacitor was mentioned by Eric at the FDIM when the 
> K3S was introduced.
> 
> The new synthesizers made that lower frequency operation possible, and I 
> assume that during testing, the noise was noticed.
> 
> 73,
> Don W3FPR
> 
> On 6/23/2017 7:38 PM, Fred Jensen wrote:
>> OK Don, I'll bite:  What does a "220uF Solid Polymer Electrolytic 
>> Capacitor on the output of the 8 volt regulator" have to do with an 
>> "extension of the K3 tuning range to 100 KHz?"  Voltage regulators are 
>> usually found at the far end of the circuit from frequency determining 
>> components.  Enquiring minds would like to know. [:-)