RM KL703 Reviews?

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barefootindian
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RM KL703 Reviews?

Post by barefootindian »

Hi has anyone used the above amplifier? Any thoughts, good or bad. Is it worth getting or is there better ones to be had that would be of the same wattage more or less?
Edd200sx
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Re: RM KL703 Reviews?

Post by Edd200sx »

I’ve got one seems to work well.

Pretty sure it’s the most powerful 12v commercially
Available at the mo
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gmham
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Re: RM KL703 Reviews?

Post by gmham »

Sure there are a couple of reviews on YouTube . Lovely amp but obtaining a suitable psu to run it at a reasonable price is the problem !
Yaesu FTDX10
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Re: RM KL703 Reviews?

Post by Edd200sx »

gmham wrote: 17 Apr 2021, 08:38 Sure there are a couple of reviews on YouTube . Lovely amp but obtaining a suitable psu to run it at a reasonable price is the problem !
£130-£160 for a supply
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Re: RM KL703 Reviews?

Post by gmham »

That’s better than I thought. Got any links ?
Yaesu FTDX10
Kenwood TS711e
Anytone D578UV Pro+

Moxon antenna for 10/20 mtrs

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gmham
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Re: RM KL703 Reviews?

Post by gmham »

Image
Cheers mate appreciate that.
What sort of output powers are you getting for a given input ?
Yaesu FTDX10
Kenwood TS711e
Anytone D578UV Pro+

Moxon antenna for 10/20 mtrs

——
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gmham
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Re: RM KL703 Reviews?

Post by gmham »

You tested out the swr on the radio side when using linear ? one owner reporting a 2.0 swr with the linear .
Yaesu FTDX10
Kenwood TS711e
Anytone D578UV Pro+

Moxon antenna for 10/20 mtrs

——
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Re: RM KL703 Reviews?

Post by Edd200sx »

gmham wrote: 20 Apr 2021, 13:16 You tested out the swr on the radio side when using linear ? one owner reporting a 2.0 swr with the linear .
Miss match on the patch leads probably
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Re: RM KL703 Reviews?

Post by Edd200sx »

gmham wrote: 20 Apr 2021, 07:39 Image
Cheers mate appreciate that.
What sort of output powers are you getting for a given input ?
30w around 430w out
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Re: RM KL703 Reviews?

Post by gmham »

Edd200sx wrote: 20 Apr 2021, 19:09
gmham wrote: 20 Apr 2021, 07:39 Image
Cheers mate appreciate that.
What sort of output powers are you getting for a given input ?
30w around 430w out
Okay thanks mate. Will keep an eye out for a used one at a decent price.
Yaesu FTDX10
Kenwood TS711e
Anytone D578UV Pro+

Moxon antenna for 10/20 mtrs

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Re: RM KL703 Reviews?

Post by Edd200sx »

I doubt it will be cheap even second hand. The retail has even
Gone up recently on them
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Re: RM KL703 Reviews?

Post by stanogs68 »

Edd200sx wrote: 19 Apr 2021, 11:38
gmham wrote: 17 Apr 2021, 08:38 Sure there are a couple of reviews on YouTube . Lovely amp but obtaining a suitable psu to run it at a reasonable price is the problem !
£130-£160 for a supply
would a watson not power it ?
love your familly
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Re: RM KL703 Reviews?

Post by gmham »

Edd200sx wrote: 20 Apr 2021, 19:08
gmham wrote: 20 Apr 2021, 13:16 You tested out the swr on the radio side when using linear ? one owner reporting a 2.0 swr with the linear .
Miss match on the patch leads probably
This is another owner mention about the high swr problem, can’t find the other owners post on FB but this is someone else reporting similiar. Yours okay ? Possibly just a batch that were built having this particular issue ?

HIGH SWR ON RM KL703......The RM KL703 is a great Amplify very well built in my opinion. Only One Snag is the high SWR it shows the Radio on high Power. To remade this add a chunky verible Capacitor (marked with Yellow Circle) to the input of the first Inductor to Ground. Then monitor the SWR on the Radio & adjust the Capacitor until SWR comes down & it's possible to get a standing Needle. . You could use fixed value Capacitors but you would have to experiment with different values. Sorry i don't know the value of the verible Capacitor but obviously RM didn't use enough Capacitance in the surface mout Capacitor that's installed.
Yaesu FTDX10
Kenwood TS711e
Anytone D578UV Pro+

Moxon antenna for 10/20 mtrs

——
John - 108TM154 / 108CO154
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Re: RM KL703 Reviews?

Post by Edd200sx »

No I don’t get any swr issues at all 1.12 at 300w

gmham wrote: 07 May 2021, 10:12
Edd200sx wrote: 20 Apr 2021, 19:08
gmham wrote: 20 Apr 2021, 13:16 You tested out the swr on the radio side when using linear ? one owner reporting a 2.0 swr with the linear .
Miss match on the patch leads probably
This is another owner mention about the high swr problem, can’t find the other owners post on FB but this is someone else reporting similiar. Yours okay ? Possibly just a batch that were built having this particular issue ?

HIGH SWR ON RM KL703......The RM KL703 is a great Amplify very well built in my opinion. Only One Snag is the high SWR it shows the Radio on high Power. To remade this add a chunky verible Capacitor (marked with Yellow Circle) to the input of the first Inductor to Ground. Then monitor the SWR on the Radio & adjust the Capacitor until SWR comes down & it's possible to get a standing Needle. . You could use fixed value Capacitors but you would have to experiment with different values. Sorry i don't know the value of the verible Capacitor but obviously RM didn't use enough Capacitance in the surface mout Capacitor that's installed.
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