K3 , Elecraft Transverter K144XV-K

[Viggo Magnus Nilsen]

Hello K3 owners !

Want to know the lowest power setting Elecraft internal 2 meter transv.( K144XV-K)??, know the max out is 8 to 10 watt approx.......

My DB6NT transverters ( IF 144 MHz) need 0,5 to 5 watt ,(IF power settings are adjustable in the DB6NT Transverter)





73' Viggo  LA9NEA
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[David Pratt]

I have just measured my K144XV power output with an accurate power output meter and find that with the K3 set for 1mW the output is 10.5W.  But setting the K3 to 0.1mW (fully counter-clockwise) the output goes down to only about 7W.  No matter what I do, I am unable to reduce the power further.

It will be interesting to see if other K144XV users find the same.

73 de David G4DMP

On 7 Jan 2015 04:20, Viggo Magnus Nilsen <[hidden email]> wrote:
>
> Hello K3 owners !
>
> Want to know the lowest power setting Elecraft internal 2 meter transv.( K144XV-K)??, know the max out is 8 to 10 watt approx.......
>
> My DB6NT transverters ( IF 144 MHz) need 0,5 to 5 watt ,(IF power settings are adjustable in the DB6NT Transverter)
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[GM4JJJ]

It might be safest to consider using a 3dB power attenuator on the input of the DB6NT transverter, then you don't have to worry about over driving it. There are some inexpensive 20 watt 3dB or 6 dB attenuators on eBay from China that would do, or you could use the smaller more expensive types that bolt onto a heat sink.

If the DB6NT has a common RX/TX IF port then that loss on RX should not matter very much as the gain of the transverter should be high enough to overcome it.

It also is better from a transmitted wideband noise point of view to do this, as just turning down the drive level to the 144MHz transverter by 3dB reduces the S/N of the transmitter output by that figure.



73

David Anderson GM4JJJ

> On 7 Jan 2015, at 09:10, David Pratt <[hidden email]> wrote:
>
> I have just measured my K144XV power output with an accurate power output meter and find that with the K3 set for 1mW the output is 10.5W.  But setting the K3 to 0.1mW (fully counter-clockwise) the output goes down to only about 7W.  No matter what I do, I am unable to reduce the power further.
>
> It will be interesting to see if other K144XV users find the same.
>
> 73 de David G4DMP
>
>> On 7 Jan 2015 04:20, Viggo Magnus Nilsen <[hidden email]> wrote:
>>
>> Hello K3 owners !
>>
>> Want to know the lowest power setting Elecraft internal 2 meter transv.( K144XV-K)??, know the max out is 8 to 10 watt approx.......
>>
>> My DB6NT transverters ( IF 144 MHz) need 0,5 to 5 watt ,(IF power settings are adjustable in the DB6NT Transverter)
> ______________________________________________________________
> Elecraft mailing list
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> 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]

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[alexandr.kobranov]

HI David,

so my numbers:

for 144.300MHz
0,1mW -> 2W out
1mW -> 9W

for 146.100MHz (as I have I/F for 10GHz from 146MHz up)
0,1mW -> 1,3W
1mW -> 7W

hope You did power calibration via K3 Utility whwre is also 1mW output
calibration
(I did ;-))

All the best and GL,
73!

Lexa, OK1DST
K3/100 #727



---------- Původní zpráva ----------
Od: David Pratt <[hidden email]>
Komu: Viggo Magnus Nilsen <[hidden email]>
Datum: 7. 1. 2015 10:10:58
Předmět: Re: [Elecraft] K3 , Elecraft Transverter K144XV-K

"I have just measured my K144XV power output with an accurate power output
meter and find that with the K3 set for 1mW the output is 10.5W. But setting
the K3 to 0.1mW (fully counter-clockwise) the output goes down to only about
7W. No matter what I do, I am unable to reduce the power further.

It will be interesting to see if other K144XV users find the same.

73 de David G4DMP

On 7 Jan 2015 04:20, Viggo Magnus Nilsen <[hidden email]> wrote:
>
> Hello K3 owners !
>
> Want to know the lowest power setting Elecraft internal 2 meter transv.( K
144XV-K)??, know the max out is 8 to 10 watt approx.......
>
> My DB6NT transverters ( IF 144 MHz) need 0,5 to 5 watt ,(IF power settings
are adjustable in the DB6NT Transverter)
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[Pierfrancesco Caci]

>>>>> "David" == David Pratt <[hidden email]> writes:


    David> I have just measured my K144XV power output with an accurate power output meter and find that with the K3 set for 1mW the output is 10.5W.  But setting the K3 to 0.1mW (fully counter-clockwise) the output goes down to only about 7W.  No matter what I do, I am unable to reduce the power further.
    David> It will be interesting to see if other K144XV users find the same.

Mine doesn't go below 6W as measured with the W2.


--
Pierfrancesco Caci, ik5pvx
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[Dave-3]

Mine goes down to 1W which is the level I use now on my db6nt transverters.

I initially used 3W (to simulate my IC202 power) but the db6nt IF pin diodes
kept breaking

Dave

G4FRE
------------------------------


Hello K3 owners !

Want to know the lowest power setting Elecraft internal 2 meter transv.(
K144XV-K)??, know the max out is 8 to 10 watt approx.......

My DB6NT transverters ( IF 144 MHz) need 0,5 to 5 watt ,(IF power settings
are adjustable in the DB6NT Transverter)

73' Viggo  LA9NEA



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