Re: [Elecraft] KPA1500 duty cycle

The KPA1500 can handle 1500W RTTY contest operation with no problem. Same for CW. (One of our Field Testers is W0YK. See his review on eHam.) 73, Eric /elecraft.com/ On 2/15/2018 6:48 AM, Nr4c wrote: And you can affect duty cycle by adjusting the cw repetition rate. If it gets too hot

Re: [Elecraft] KPA1500 duty cycle

Easy to handle for the 1500 on any band. :-) 73, Eric /elecraft.com/ On 2/15/2018 12:51 AM, Richard Lamont wrote: The FT8 parameters were tweaked slightly during the beta phase prior to the release of WSJT-X 1.8.0, and the TX time was reduced to 12.64 sec, so the duty cycle is now about 42%.

Re: [Elecraft] KPA1500 duty cycle

And you can affect duty cycle by adjusting the cw repetition rate. If it gets too hot increase the delay. Sent from my iPhone ...nr4c. bill > On Feb 15, 2018, at 7:39 AM, "j...@kk9a.com" wrote: > > RTTY contesting has a much higher duty cycle, especially when using a > single

[Elecraft] KPA1500 duty cycle

RTTY contesting has a much higher duty cycle, especially when using a single radio and no one is answering your CQs. John KK9A On Feb 15 03:51:39 G4DYA wrote: The FT8 parameters were tweaked slightly during the beta phase prior to the release of WSJT-X 1.8.0, and the TX time was reduced to

Re: [Elecraft] KPA1500 duty cycle

The FT8 parameters were tweaked slightly during the beta phase prior to the release of WSJT-X 1.8.0, and the TX time was reduced to 12.64 sec, so the duty cycle is now about 42%. 73, Richard G4DYA On 15/02/18 01:22, Dennis Moore wrote: > Specification is 13.48 sec TX, 16.52 sec RX, 45% Duty

Re: [Elecraft] KPA1500 duty cycle

Specification is 13.48 sec TX, 16.52 sec RX, 45% Duty Cycle. Source: http://qrznow.com/new-digital-mode-from-k1jt-ft8/ 73, Dennis NJ6G On 2/14/2018 17:07, Tom-KQ5S wrote: I believe FT8 is 13 sec TX, 2 sec decode and then 15 sec RX for a total of 17 sec non-TX so you have 13 sec TX and 17 sec

Re: [Elecraft] KPA1500 duty cycle

I believe FT8 is 13 sec TX, 2 sec decode and then 15 sec RX for a total of 17 sec non-TX so you have 13 sec TX and 17 sec RX. Much less than 50%. - 73, Tom - KQ5S On Wed, Feb 14, 2018 at 6:51 PM, Jim Brown wrote: > And even this is conservative --

Re: [Elecraft] KPA1500 duty cycle

And even this is conservative -- JT65 is 48 sec TX and 72 sec RX, so 40% duty cycle. FT8 and MSK144 have equal TX and RX times, so 50% duty cycle. The TX period for MSK144 can be varied from 5-30 sec, but TX and RX times are always equal. 73, Jim K9YC On 2/14/2018 3:25 PM, Eric Swartz -

Re: [Elecraft] KPA1500 duty cycle

Hi Erik, Yes, the amp can run indefinitely on 50 Mhz with 50 sec key down TX at continuous 1500W carrier followed by 50 sec in RX. We specifically were looking at 100% carrier modes like JT65 etc. when we conservatively specified this. 73, Eric /elecraft.com/ On 2/14/2018 11:07 AM, Erik

[Elecraft] KPA1500 duty cycle

A recent Elecraft newsletter stated that "the KPA1500 is a high duty cycle amplifier compatible with most digital modes ranging from RTTY through JT65 etc.". The KPA1500 manual specifices for 50 MHz "Maximum 50 sec key down / 50 sec standby (Rec. Min Fan Speed set = 2)". My question: For the 50