[Elecraft] K3/100 Voltage Drop when transmitting

[James Walker]

Thanks Don. I’m sure the problem is with with the Astron as you suggest. I’ll try your suggestions when I’m back at home in “shop mode,”

Jimmy

> On Feb 25, 2019, at 2:30 PM, Don Wilhelm <donwilh at embarqmail.com> wrote:
> 
> Jimmy,
> 
> Astron power supplies have a nasty habit of having loose wiring terminals.  They use only pressure to hold the ring terminals on the inside to the terminal bolts.
> If you can detect even a slight rotation of the bolt when tightening terminals on the outside, remove the covers and tighten those bolts from the inside.
> 
> The other problem is improperly assembled APP connectors.  If you look straight into the end of the connector, if you can see the tip of 2 blades in either side, give the contact blade an extra push from the wire side until the contact blade locks over the locking tab.
> That is also a cause of APP connectors which tend to pull out with very little tension.
> 
> 73,
> Don W3FPR
> 
> On 2/25/2019 2:12 PM, James Walker wrote:
>> I have a K3 that behaves similarly to what Mike described. I switched from an Astron 25 amp (15 years or more old) power supply to a switching power supply. Problem solved. One would think the problem was my Astron power supply, but I don’t see any such power drop when I use my Astron with other 100 watt rigs. Very strange.
>> Jimmy Walker, WA4ILO
>> Macon, GA