[Elecraft] Fwd: K1 #3206

[Scotty Long]

72/73/Scotty/NUØS


-------- Original Message --------
Subject: Re: [Elecraft] K1 #3206
From: Scotty Long <nu0s at hotmail.com>
To: don at w3fpr.com
CC: 

Very cool Don K1-4 #3206 is on line/alive and well first short QSO to TX with W5GXV on 30m... the noise blanker and internal tuner are ready for install down the road after I have some fun and get use to it... Thanks for all your help...


72/73/Scotty/NUØS




Don Wilhelm <don at w3fpr.com> wrote:

Scotty,

Just a bit of history - the 2SC2166 was originally used in both the K1, K2 and KX1, but then the supply of those dried up, and the 2SC5739 was used as a replacement.
Later as things would have it, the 2SC5739 became "unobtainium" but a supply of the 2SC2166 was found,
The 2SC5739 actually worked better in the KX1 and at the higher bands on the K2, but made no difference in the K1.
I do wish the 2SC5739 were still available - I found some in China and bought 10 of them - tried one and threw the rest in the trash, they certainly did not live up to the normal specs, but might have been OK for audio frequencies.

73,
Don W3FPR

On 5/25/2013 4:49 PM, Scotty Long wrote:

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Thank you Don I must have updated an already updated manual??? mine indeed does say what you stated below.  Thank you Sir have a great weekend...
 
73/Scotty/NU0S
 

Date: Sat, 25 May 2013 16:46:55 -0400
From: w3fpr at embarqmail.com
To: nu0s at hotmail.com
CC: elecraft at mailman.qth.net
Subject: Re: [Elecraft] K1 #3206

Scotty,

Install the 2SC2166 at Q6.

I am not certain which manual revision you are using, but at the top left of the K1 manual Rev I, you should see the following:


"TO-220 package transistors Q6 and Q7 look identical, but are 

different types. Locate the 2SC1969 (labeled "C1969"), Q7, and set it 

aside. The remaining transistor, Q6, will be either a 2SC2166 (C2166) 

or a 2SC5739 (C5739). This transistor will be installed first"

73,
Don W3FPR

On 5/25/2013 3:19 PM, Scotty Long wrote:

On page 43 of K1 manual Q6 it calls out for a C5739...mine is a C2166 is this ok ??? Or do I need a C5739 the errata is a bit confusing to a simpleton...