Re: [Elecraft] KAT100 Question on SWR/Operation
On Sat, 13 Oct 2007, Lee Buller wrote: OR - when the SWR is 1:1...should the operator take out the tuner? Physically? Any advice or opinion? (Like this bunch doesn't have any of that) You may have made the under-statement of the year. 73 - Thom K3HRN Zerobeat Ham Forums: www.zerobeat.net/smf www.tlchost.net/hosting/ Web Hosting as low as 3.49/month ___ 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] KAT100 Question on SWR/Operation
The KAT100 does not have a relay to bypass the LC circuits. So, with an existing match, it still needs to tune out its own impedances in order to operate properly. If you know that the antenna is already matched, you should tune the KAT100 into a dummy load, then use the settings it works out with the matched antenna(s). In newer tuners (T1 for example) and additional relay has been added to bypass the LC circuits so that if the tuner sees a low SWR to start off it will stop the tune procedure and go with the bypass condition. Hope this helps! On Oct 13, 2007, at 5:09 AM, Lee Buller wrote: I have searched the email archivesbut have not found an answer to this question about the KAT-100 Tuner. When the SWR to the antenna is 1:1 without the tuner(and the KAT100 is in line) does the KAT100 figure that there is no issue and goes to a mode or point where there is no C and no L in the L/C network? In effect, passing the RF through the unit? According to the MENU...L = 00.6 and C = 0.30 Looks like there is some L and C still in the circuit. OR - when the SWR is 1:1...should the operator take out the tuner? Any advice or opinion? (Like this bunch doesn't have any of that) Lee - K0WA - Jack Brindle, W6FB - ___ 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] KAT100 Question on SWR/Operation
Lee, The KAT100 (note no dashes in Elecraft model numbers - except for the N-Gen :-) ) does not automatically go to a bypass mode. If you tune it into a 50 ohm resistive load, you may find it tunes to some small inductance and capacity in-circuit and may actually increase the SWR a small bit because it tunes until the SWR is small and that is not necessarily SWR = 1 (it may be 1.1 or 1.2 which is close enough at HF). If you wish the tuner to be in bypass for all bands *and* both antenna jacks, enter the menu and set it to CAL P or one of the other bypass states. But if you need it bypassed for only one band or only one of the output jacks and *not* the others, just TUNE into a dummy load for all the bands and/or antenna jack that will connect to the 50 ohm resonant antenna. 73, Don W3FPR Lee Buller wrote: I have searched the email archivesbut have not found an answer to this question about the KAT-100 Tuner. When the SWR to the antenna is 1:1 without the tuner(and the KAT100 is in line) does the KAT100 figure that there is no issue and goes to a mode or point where there is no C and no L in the L/C network? In effect, passing the RF through the unit? According to the MENU...L = 00.6 and C = 0.30 Looks like there is some L and C still in the circuit. OR - when the SWR is 1:1...should the operator take out the tuner? ___ 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
