[Elecraft] KPA500 transformer taps

Check your house wiring. The outlet might be wired with 14 gauge wire and is an extra-long run. I have about 20ft of 12 gauge wire to the outlets in my shack and key up is 123.6ac and 74.5dc. Key down is 122.2 and 62.8. -- Jack WA9FVP- http://www.will

Re: [Elecraft] KPA500 transformer taps

Ray, As Phil has indicated, the 10 volt drop in the AC mains may be the only problem and should be investigated. Tracking it down to the trouble spot as Phil has detailed is the 'only way to go'. What I would look for is loose connections (screws) at the breaker box and at each receptacle tha

Re: [Elecraft] KPA500 transformer taps

On Thu,6/1/2017 9:41 AM, Phil Kane wrote: As Josh said earlier, be very concerned about the10 volt drop in the AC voltage measured at the load. All great advice. Also, try to trace the wiring that feeds the outlet that the amp is plugged into. Possible causes of the high voltage drop are 1) c

Re: [Elecraft] KPA500 transformer taps

On 6/1/2017 8:11 AM, Ray W2RS via Elecraft wrote: > > With no load, my AC line voltage is 121 and my power supply voltage > is 73. With full load, the readings are 111 and 53, respectively. > That is with the yellow transformer tap in place. Should I switch to > another tap? As Josh said earlier

Re: [Elecraft] KPA500 transformer taps

I'd be first concerned with the 10V drop in line voltage. Do you know where that's occurring? 73, Josh W6XU Sent from my mobile device > On Jun 1, 2017, at 8:11 AM, Ray W2RS via Elecraft > wrote: > > > With no load, my AC line voltage is 121 and my power supply voltage is 73. > With full

[Elecraft] KPA500 transformer taps

With no load, my AC line voltage is 121 and my power supply voltage is 73. With full load, the readings are 111 and 53, respectively. That is with the yellow transformer tap in place. Should I switch to another tap? 73 Ray W2RS _