60M, Steve?

73,
Ray
KJ5MI

On Thu, May 25, 2023 at 06:18 AM, Steve wrote:

When I am on 60m and have antenna 1 selected I am transmitting on antenna 2, if I select antenna 2 it works properly. Has anyone experienced this? This is only happening on 60m.

As seen near the bottom of this page "Frequency Range: 1.8 to 54 MHz" is listed as part of the LA-1K Specifications.? But, how do you trick your LA-1K to work on the 60-Meter band, Steve?

73,
Ray
KJ5MI

I am not tricking it to work.? The antenna goes through the Amp. I am trying to select the antenna I want to use on 60m.?

Please find below an excerpt (highlighted in bold/italic text for clarity) from Page 5 of the LA-1K Technical Manual for your consideration, Steve.

BAND SELECT
To switch bands (160M, 80M, 40M, 20M-15M, 12M/10M, 6M) press the
BAND button on the touch-screen display then select the desired band.

As can be seen above, 60M isn't a band available on the "LA-1K RF SENSING 1000W DUAL HF LDMOS AMPLIFIER" currently available from Palstar.

Thought you might have, for example, modified the firmware on your LA-1K amp to allow it to work on the 60-Meter band.

Oh btw, 6M (labeled 50MHz by some manufacturers) is an available band on the LA-1K, so I am not sure why Palstar would exclude 6M in naming the LA-1K amp because HF doesn't cover 6M.

73,
Ray
KJ5MI

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I would suggest that this thread has nothing to do with that! But reading is no longer a requirement. I give up on a meaningful response! You all enjoy assuming I am trying to hack my palstar to work on 60m instead of figuring out why the antenna selection is an issue.

Steve,
I understand your frustration with the latest replies.???

I am not sure if you want to use Ant 1 or Ant 2 in the situation you described.
Assuming you want Ant 2, If the amp is turned on, (which it would have to be in order to select an antenna)? and even though it is in bypass/standby, perhaps? it automatically ? detects a frequency,? and if so, maybe it is defaulting to Ant 1??
73, Ron?? WA2EIO

On Fri, May 26, 2023 at 07:20 PM, Dennis wrote:

I would suggest that the type acceptance requirement for the amp would MANDATE that it not be usable on 60 meters since the maximum allowable transmit power on that band is 50 watts ERP.? ?Just like the 27mhz lockout is required.? Using this amp on 60 meters would be illegal.

Please find below an excerpt (highlighted in bold/italic text for clarity) from 47 CFR Part 97 (up to date as of 5/04/2023), page 45 of 52, for your consideration, Dennis.

Accordingly, I believe the "50 watts ERP" so alluded to in your post has been superseded!

If 60M were a band available on the LA-1K amp (which it isn't), using the amp on the 60-Meter band would be perfectly legal as long as a licensed amateur operator doesn't violate any and all pertinent parts of 47 CFR Part 97, as amended.

Oh btw, 60M capabilities are available on my KPA1500 amplifier (FCC ID: UTR-KPA1500) currently available from Elecraft, Inc.

Please feel free to visit my QRZ page to eyeball my Elecraft KPA1500 (next to my LA-1K) to see for yourself 60M can be selected by the push of the button 5 to the right of the button AUX located on the lower left corner of the KPA1500.? "Band 5 MHz" appears briefly in the Status/Menu Display of the amp each time the amp is being switched to 60M.

73,
Ray
KJ5MI

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On Fri, May 26, 2023 at 07:52 PM, Ron - WA2EIO wrote:

Steve,
I understand your frustration with the latest replies.???

I am not sure if you want to use Ant 1 or Ant 2 in the situation you described.
Assuming you want Ant 2, If the amp is turned on, (which it would have to be in order to select an antenna)? and even though it is in bypass/standby, perhaps? it automatically ? detects a frequency,? and if so, maybe it is defaulting to Ant 1??
73, Ron?? WA2EIO

I have moved my wire antenna to Ant 2, now 60m is going to my wire.? When I had it on Ant 1 if I turned off the Amp it worked.? I do not understand why it seems to default to Ant 2 for 60m?? Thank You Ron for reading the question!

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On Sat, May 27, 2023 at 01:32 AM, Barry wrote:

I use a 60m antenna on Antenna 1 and have no issues here direct cable to radio.

What HF band is shown just above the "BAND" button on the LA-1K touch-screen display, when your LA-1K is on STBY mode and is being direct-cabled to your 60M-selected operating transceiver, Barry?

73,
Ray
KJ5MI

Depends on your country.? In the US, the max is 100W PEP ERP.? If you are using a 1/4 wave vertical, and a 100W RIG, you could not achieve 100W ERP without an amp.
FWIW, mine works fine on 60m, just have to be careful with the drive power so you do not exceed the 100W ERP which in my case, is 200W output with my antenna.
N5GGG

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Hi Hiram,

I use my Elecraft KX2 as a QRP exciter to operate on 5346.5 kHz USB with my Elecraft KPA1500 set to Band 5; staying well within the permissible 100W PEP ERP limit.? The built-in ATU of my KPA1500 even provides VSWR matching for my experimental 60M antenna.

I certainly wouldn't want to pair my LA-1K with the Elecraft KX2 in like manner for reasons cited in my posts here /g/la1k/topic/99360701#1316 under the topic of FCC ID: 2ANZ2-LA-1K.

73,
Ray
KJ5MI

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