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 increa
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%.
7
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 radio and no on
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 12.6
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 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
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 -- JT65 is 48 sec TX and 72 sec R
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 - WA6HH
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 Basi
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 M
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