What would be a normal value on the FP voltage display when tx at 100W, using factory fused cables? No sub installed.
PS is Astron VS-35M linear, voltage set at 13.9 idling per FP display. drops to 11.1 on TX. Current varies but up to 15.5A indicated. Specs call for 17-22A tx @100W. I suspect bad pass transistor and/or high drop over fuses, but want to establish normal indication for tx drop. 11.1v seems way out. tnx in advance -- de AB1VL NAQCC #6799 ab1vl.com I know it's a late reply but I too experienced similar (large) voltage drops with my first K3. (Serial number in the 4000's and with all options but the KRX3) It turns out it had dry joints on the main power input connectors on its motherboard. (In fact, It had NO SOLDER AT ALL on the connections between the Anderson plugs and the motherboard.) They were found by its second owner when they investigated the low voltage issues. I had been grumbling about the voltage drop on here ever for some time after I purchased the factory built K3 only to get the "It must be the leads" claptrap all the time from folks on this reflector. I almost didn't buy my second K3 because of it, I wasn't a happy camper to say the least. One of these days I will update my current K3, but I supposed I better figure out how to turn it on, it's been over 12 months since I've used it. :D ----- Jeff Cochrane - VK4XA Innisfail, QLD, Australia. K3 #4767 -- View this message in context: http://elecraft.365791.n2.nabble.com/normal-K3-voltage-drop-on-TX-tp7606504p7606608.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
