[Elecraft] Re: K2 output power and external amps.
Hi Bill, I just went though this last week with my K2/100 driving a SB200. I was able to minimize this (but not eliminate it) by increasing R99 (on BOTTOM of main board...I spent about a half hour looking for it on the top!) . See this tech tip: http://www.elecraft.com/Apps/Power_Control_Mod.html I put a trimpot on mine, to temporarily seek the right value (replaced with fixed resistor after experimentation) and I ended up with something like 680 ohms as I recall. It didn't eliminate the issue...and indeed it appears on mine not to be POSSIBLE to eliminate it, but it's better, and I am able to tune the SB200 without much trouble. The K2/100 and the SB-200 make a fine DXing station!! John K5MO ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: K2 output power and external amps.
On Aug 31, 2005, at 10:11 AM, [EMAIL PROTECTED] wrote: See this tech tip: http://www.elecraft.com/Apps/Power_Control_Mod.html I put a trimpot on mine, to temporarily seek the right value (replaced with fixed resistor after experimentation) and I ended up with something like 680 ohms as I recall. Yes, I dispensed with the trimpot and went directly to 1 K for R98. This has made the shifts considerably smaller, but they are still bothersome. I'm going to try a larger value, such as 1.5 or 2 k next time I have the K2 apart. I made need to make some changes to T1 and T2 in order to avoid decreasing the overall TX gain. Bill Coleman, AA4LR, PP-ASELMail: [EMAIL PROTECTED] Quote: Not within a thousand years will man ever fly! -- Wilbur Wright, 1901 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
