[Elecraft] KPA 500 Power Amp.

[Jack Brindle]

If all the other bands transmit OK, then the problem is probably not with the KPA500. While it is very difficult to debug a situation without any information, please check that you do not have an alternative output selected on your transceiver, The fact that you have not mentioned any KPA faults tells me that the KPA simply is not getting any input power on 60m.

Good luck!

73,
Jack, W6FB
Author and keeper of the KPA500 code…


> On Dec 24, 2024, at 4:56 PM, Wilber Bandemer via Elecraft <elecraft at mailman.qth.net> wrote:
> 
> Thanks! I can not transmits on 60 meters. I have to turn Power Amp off. All others transmits OK.73Wilber AB5WW
> 
> Sent from AOL on Android 
> 
>  On Tue, Dec 24, 2024 at 3:59 PM, Rick NK7I<rick.nk7i at gmail.com> wrote:   Why not?
> 
> I use the KPA1500 on 60M, at ~3 watts from the K4 to get the legal 100 W output (plus or minus antenna gain/loss).
> 
> So I’m not running full bore on the driver, no part works hard; but it’s not efficient (so what, power is cheap here).
> 
> I do the same on 30M (200 watt US output limit), with a little more drive.
> 
> 73,
> Rick nk7i
> 
>> On Dec 24, 2024, at 1:32 PM, jerry <jerry at tr2.com> wrote:
>> 
>> Why use it on 60M?  Legal limit is 100W ERP on that band.
>> 
>>                 - Jerry, KF6VB
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