[Elecraft] K2 #4785
Hi all. K2 #4785 is well under way no major problems yet. my kit was supplied with inductor L31 10uh. but due to xtal not being 'rubber' enough ref Gary at support, to give me the correct pll range. I am waiting on a replacement for L31 with a value of 12uh The manual states a prefered range of 9.8 to 15kHz my range was 9.06. I have noticed on the elecraft website under builder resource(after removing part grrr) that a range of 8.8 to 18kHz is ok, can someone explain these values, oh by the way I have cut out and destroyed in the process the 10uh choke so I have to wait for replacement, comments on cutting out parts before replacements arrive would not be helpfull at this stage i know im a fool hi. The big question is did I need to worry in the first place looking forward to replys. Mick M1MGD> ___ 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
RE: [Elecraft] K2 #4785
Mick, I might believe 3.75 volts or above may be OK, but if you have run out of adjustment range at 3.3 volts, something is wrong. First, check the voltage out of your 8 volt regulator (Control Board U4). If it is OK, look at the schematic for the Control Board (lower left corner) to identify the resistors associated with the AGC Threshold pot - check the value of RP6 and check the soldering carefully. The RF Gain and the AGC Threshold pot and the other resistors (RP6 and the pot R1) form a three-legged voltage divider with 8 volts applied to one leg (the RF Gain control should show zero ohms in its full CW position), so if the resistor values are correct and the 8 volt supply is correct, you should have no problem adjusting to 3.8 volts with the AGC Threshold pot near max, and about 2.6 volts at the other end of rotation. Be certain that R1 is actually a 50k pot (measure directly across its terminals when adjusted for max resistance). There is nothing else in the circuit to cause problems. 73, Don W3FPR > -Original Message- > > Hi all > I have just finished alignment and test part 1 all is good > except the test for setting the AGC threshold when I adjust R1 > i can only get a max voltage of 3.30v is this ok ?. > > Thanks Mick M1MGD.. > ___ 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] K2 4785
Thanks Jim. I will try that Mick M1MGD.. ___ 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] K2 #4785
Hi all I have just finished alignment and test part 1 all is good except the test for setting the AGC threshold when I adjust R1 i can only get a max voltage of 3.30v is this ok ?. Thanks Mick M1MGD.. ___ 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] K2 #4785
Hello all K2 #4785 Has arrived in the UK today no parts missing..5 days to get here wow. 2 years since i built my K1 #1532 so this should be fun. Mick m1mgd ___ 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
