[Elecraft] K2 RF Output...SOLVED

Well, that was easy. With the help of Don w3fpr, of course. Turns out that the internal wattmeter in the KPA100 was giving bad info to the K2. It was reporting about half the actual wattage. A quick tweak of R26 ( and R27 to match ) fixed it up. - Jerry KF6VB On

Re: [Elecraft] K2 RF Output

So - I figured - if something on the KPA100 is drawing excess current, and not really doing anything with it, it must be making heat, right? I powered up the radio through the barrel connector, left the KPA100 connected, set it to "tune" at minimum power and just left it for a while. Then

Re: [Elecraft] K2 RF Output

Jerry, Are you measuring the power output with an external wattmeter?  Or are you depending on the power setting in the base K2.  Use an external wattmeter while troubleshooting this problem and a dummy load (not an antenna) connected to the wattmeter. The K2 power will fold back when the

Re: [Elecraft] K2 RF Output

On 2021-08-08 09:49, Don Wilhelm wrote: Jerry, Replace diodes D16 and D17 in the KPA100 wattmeter, and things should settle down. *** The diodes came in from Mouser yesterday, and I replaced them. Things are still not right. I did get a good adjustment on C1, and it now reads 1 to 1 on

Re: [Elecraft] K2 RF Output

Oh, Don’s the expert, listen to him -73- FrankKG9H kg9hfr...@gmail.com > On Aug 8, 2021, at 1:07 PM, Don Wilhelm wrote: > > That won't work - the KPA100 must be physically removed to keep the base K2 > from using the KPA100 wattmeter. > > 73, > Don W3FPR > > On 8/8/2021 1:54 PM,

Re: [Elecraft] K2 RF Output

That won't work - the KPA100 must be physically removed to keep the base K2 from using the KPA100 wattmeter. 73, Don W3FPR On 8/8/2021 1:54 PM, Frank Krozel wrote: Just power the radio, not the PA -73-  Frank    KG9H kg9hfr...@gmail.com On Aug 8, 2021, at

Re: [Elecraft] K2 RF Output

Just power the radio, not the PA -73- FrankKG9H kg9hfr...@gmail.com > On Aug 8, 2021, at 12:16 PM, jerry wrote: > > All, > > Can I just remove the KPA100 and test the K2 "bare" for current draw? > > - Jerry KF6VB > > > On 2021-08-08 09:49, Don Wilhelm wrote: >>

Re: [Elecraft] K2 RF Output

All, Can I just remove the KPA100 and test the K2 "bare" for current draw? - Jerry KF6VB On 2021-08-08 09:49, Don Wilhelm wrote: Jerry, Replace diodes D16 and D17 in the KPA100 wattmeter, and things should settle down. If you attempted to adjust KPA100 C1 while this

Re: [Elecraft] K2 RF Output

Jerry, Replace diodes D16 and D17 in the KPA100 wattmeter, and things should settle down. If you attempted to adjust KPA100 C1 while this condition was present, balance the wattmeter again, it will change with good diodes installed. The diodes are 1N5711 type. That wattmeter is still used as

[Elecraft] K2 RF Output

All, My new QRO K2 behaves a little strangely... On Tune - it makes 108W on 40M, very nice. But on 20M it behaves strangely. It won't make more than 20W or so, complains about high SWR. Even though my Heathkit HM-102 SWR/Wattmeter says the SWR is zilch. So I moved it to a dummy load.