2 Meter RF Amplifier

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I have recently become interested in 2 meter FT8 operation and would like to utilize the 2 meter capability of my Flex-6700. I am aware of the DEMI and the Kuhne amplifiers, but I would like to find a lower-cost amplifier that can drive one of the two power amps that I already own. I would like to boost the approximate 0 dBm transverter output of the 6700 up to about 40 dBm (10 watts) or so.

If anyone is using or is aware of such an amplifier, I would greatly appreciate any information which you could share.

Thanks,

Ed, K0KC


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Ed, K0KC

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Posted 2 months ago

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Justin - KL2D

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How about a Mirage? They aren’t very fancy but they get the job done.

http://www.mirageamp.com/Product.php?...

Justin
KL2d
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Ed, K0KC

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Thanks for the suggestion, Justin. Actually, I own a Mirage, but it is a model that requires at least 10 watts or so input and can take up to 60 watts input as I recall. It looks like the model that requires the lowest minimum power input requires 0.25 watts and the Flex only puts out 0.001 watt or so if I read the spec correctly.

Ed, K0KC
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WX7Y

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If you don’t mind home brewing stuff you can easily build one using one of the little MOSFET RF Modules that most all radios use these days for there PA’s . If you need 5 Watts or so then a module designed for a HT would work just fine , If you need more then 5W then use one designed for a mobile like a SAV17 I think will go up to 50W.

You can get these and MANY other MOSFET modules from RF-Parts. Mounted to a large enough Heat sink and a circuit board designed to mount the Voltage regulator to and a few other components to and a couple relays you have your self a RF AMP if it has spurs then you will need to add between Band Pass filter but again these are easy to build.
73’s
Bret WX7Y
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Ed, K0KC

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Bret,

I would really like an "off the shelf" solution, but I may have to brew something up myself. Thanks for suggesting this approach!

Ed, K0KC
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David-N5PSM

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DEMI  2MLDPA is simply a full output stage just right for the 6700  I agree that for what you want it is a bit much,   but you can do more with it as well.........

  just sayin

73 de N5PSM David
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Craig K9CT

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Marc Lalonde

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HI  this is what i use  to glue together my MKU-144-G3  and W6PQL 1250W RF pallet

have use same setup whit my 6700  ,but whiteout the Transverter ... 

https://www.minikits.com.au/electronic-kits/rf-amplifiers/rf-high-power/2m-8W-Amplifier
(Edited)
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Ed, K0KC

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Thanks to all who provided me with input...I am weighing the alternatives. Marc, your setup is impressive! I will not be running anything close to 1250 watts; I will, however, consider the Mini-Kits module as one of the alternatives to drive my existing Mirage amplifier.

(Edited)
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Reg

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Ed, you mentioned that you are familiar with the Demi and Kuhne products.  I have the Beko HLV-1000LDP (low drive power) which my FLEX-6700 will drive to 1,000W.  I know that you are not looking for that much power.  However, you might be interested in the mast mounted Beko HPP-144 receive preamplifier which will pass 2.5 KW on transmit!
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Ed, K0KC

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Thanks for the info, Reg. I currently live in an antenna-restricted area and I am limited to antennas mounted in the attic above the garage. I do not anticipate ever running high power for sure and probably could not justify a mast-mounted pre-amp with my current setup. At one time, I had mast-mounted pre-amps for 2 m and 70 cm when I was into satellite operation quite a few years ago at previous QTHs.

Ed, K0KC