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Follow up on "Digital modes on 144MHz only"

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Kjeld Holm

Follow up on "Digital modes on 144MHz only"

Thanks to all who replied to my mail (see below) but allow me to ask:

Anyone using Elecraft XV144 or K144XV or HG 144-K for digital modes?

Any comments on these being better or worse than other brands?

Vy 73 de OZ1CCM, Kjeld

-----Original Message-----
From: [hidden email] [mailto:[hidden email]] On Behalf Of Kjeld Holm
Sent: 4. juli 2019 20:31
To: Elecraft Reflector
Subject: [Elecraft] Digital modes on 144MHz only

Digital modes on 144MHz only

I plan for a second station to use for digital modes on 144MHz only. If you look at performance only (no price, no ergonomics, no use outside digital modes on 144MHz) what would you prefer

1) K3/K3S with internal transverter
2) IC-9700

In both cases I plan to use a 1kW amplifier.

Vy 73 de OZ1CCM, Kjeld
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Oliver Dröse

Re: Follow up on "Digital modes on 144MHz only"

Hi Kjeld,

I'm using the internal K144XV in one my K3s. It's very sensitive and
stable (using the REFLOCK board, too), so no problem on that. BUT: the
cooling design is just terrible! :-( It's all passive relying on the
side plate of the transceiver to dissipate the heat. While this works
ok-ish on SSB it's a nightmare on CW and especially digimodes! Heat does
not get dissipated fast enough so the whole transverter heats up quite
fast which results in a serious power drop, in my case from 10 watts
down to about 5-6 watts! :-( That means instead of 1 kW output it's just
5-600 W after about 10 minutes of operation with my PA behind. :-(

I had a second K144XV and behaviour was the same. Same is true for a
third one at a friend of mine so I assume this is a general design flaw. :-(

I can only second Conrad's, PA5Y, suggestion concerning the HA1YA
transverter. Very good performance and reasonably priced compared to the
Kuhne stuff (which is probably even a tad better). Using the PRO models
myself on 4 & 2 m.

@Wayne:
If you're reading this please make sure the planned 144/430 MHz module
in the K4 will work much better! Serious DX on VHF is almost all digital
nowadays and the internal transverter needs to handle that ...

73, Olli - DH8BQA

Contest, DX & radio projects: https://www.dh8bqa.de/

Am 05.07.2019 um 20:34 schrieb Kjeld Holm:

> Thanks to all who replied to my mail (see below) but allow me to ask:
>
> Anyone using Elecraft XV144 or K144XV or HG 144-K for digital modes?
>
> Any comments on these being better or worse than other brands?
>
> Vy 73 de OZ1CCM, Kjeld
>
> -----Original Message-----
> From: [hidden email] [mailto:[hidden email]] On Behalf Of Kjeld Holm
> Sent: 4. juli 2019 20:31
> To: Elecraft Reflector
> Subject: [Elecraft] Digital modes on 144MHz only
>
> Digital modes on 144MHz only
>
> I plan for a second station to use for digital modes on 144MHz only. If you look at performance only (no price, no ergonomics, no use outside digital modes on 144MHz) what would you prefer
>
> 1) K3/K3S with internal transverter
> 2) IC-9700
>
> In both cases I plan to use a 1kW amplifier.
>
> Vy 73 de OZ1CCM, Kjeld
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>
> ---
> Diese E-Mail wurde von AVG auf Viren geprüft.
> http://www.avg.com
>
>

hbjr

Re: Follow up on "Digital modes on 144MHz only"

I find running the fans helps some for extended operation.

Hank
K4HYJ

-----Original Message-----
From: [hidden email] <[hidden email]> On Behalf Of Oliver Dröse
Sent: Friday, July 5, 2019 6:37 PM
To: [hidden email]
Subject: Re: [Elecraft] Follow up on "Digital modes on 144MHz only"

Hi Kjeld,

I'm using the internal K144XV in one my K3s. It's very sensitive and stable (using the REFLOCK board, too), so no problem on that. BUT: the cooling design is just terrible! :-( It's all passive relying on the side plate of the transceiver to dissipate the heat. While this works ok-ish on SSB it's a nightmare on CW and especially digimodes! Heat does not get dissipated fast enough so the whole transverter heats up quite fast which results in a serious power drop, in my case from 10 watts down to about 5-6 watts! :-( That means instead of 1 kW output it's just
5-600 W after about 10 minutes of operation with my PA behind. :-(

I had a second K144XV and behaviour was the same. Same is true for a third one at a friend of mine so I assume this is a general design flaw. :-(

I can only second Conrad's, PA5Y, suggestion concerning the HA1YA transverter. Very good performance and reasonably priced compared to the Kuhne stuff (which is probably even a tad better). Using the PRO models myself on 4 & 2 m.

@Wayne:
If you're reading this please make sure the planned 144/430 MHz module in the K4 will work much better! Serious DX on VHF is almost all digital nowadays and the internal transverter needs to handle that ...

73, Olli - DH8BQA

Contest, DX & radio projects: https://www.dh8bqa.de/

Am 05.07.2019 um 20:34 schrieb Kjeld Holm:

> Thanks to all who replied to my mail (see below) but allow me to ask:
>
> Anyone using Elecraft XV144 or K144XV or HG 144-K for digital modes?
>
> Any comments on these being better or worse than other brands?
>
> Vy 73 de OZ1CCM, Kjeld
>
> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]] On Behalf Of Kjeld Holm
> Sent: 4. juli 2019 20:31
> To: Elecraft Reflector
> Subject: [Elecraft] Digital modes on 144MHz only
>
> Digital modes on 144MHz only
>
> I plan for a second station to use for digital modes on 144MHz only.
> If you look at performance only (no price, no ergonomics, no use
> outside digital modes on 144MHz) what would you prefer
>
> 1) K3/K3S with internal transverter
> 2) IC-9700
>
> In both cases I plan to use a 1kW amplifier.
>
> Vy 73 de OZ1CCM, Kjeld
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net Please help support this email
> list: http://www.qsl.net/donate.html Message delivered to
> [hidden email]
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net Please help support this email
> list: http://www.qsl.net/donate.html Message delivered to
> [hidden email]
>
> ---
> Diese E-Mail wurde von AVG auf Viren geprüft.
> http://www.avg.com
>
>

______________________________________________________________
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Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

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Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email]

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Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

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