I'd be curious in hearing from others about their experiences with LNA's for
2M. I use a 144 MHz SSB mast mounted pre amp at my home station and it makes a
modest difference for weak signal work.
I rarely bother with pre amps when roving on 144 MHz. On the other hand
over the decades I have gotten a lot of use out of preamps on 432 and 1296 MHz
(for weak signal, roving, FM, AMSAT and repeater station applications.) The
few times I have roved on 432 MHz without a preamp I have missed having it.
Other than the pre amp built into one of my 222 MHz power amplifiers I have no
experience with pre amps on that band.
73
Mark S
VE7AFZ
mark@alignedsolutions.com
604 762 4099
> On Dec 12, 2019, at 4:06 PM, John Young via VHFcontesting
> <vhfcontesting@contesting.com> wrote:
>
>
> ARR no longer sells mast mounted LNAs. I called them last week and I was
> told they dropped the product line due to high cost and low sales.
>
> I had a SSB 432 mast mounted pre amp that I stupidly shorted out, destroyed
> and can't get fixed without sending it to Germany. I cant find anything of
> similar quality to ARR or SSB to replace it with. There is a gentleman
> selling a 2M ICOM (Quality) used pre amp at a ridiculously low price but it
> pulls power from the center conductor (bias T required) and needs a sequencer
> to switch off power before transmit unless you have the right ICOM radio
> (910H I think) to do that automatically.
>
> I run LMR-400 with under a dB loss and 1.1 to 1.3 VSWR. My 991A benefitted
> greatly from the SSB 432 pre amp but the SSB 2M pre amp did nothing for me.
> I have a 432 reciever sensitivity problem, 144 performance is awesome. I
> suggest you look at 2M cable loss and connector loss before getting a $400
> pre amp. After you minimize losses if you still have problems maybe you do
> need a pre amp
>
>
> What radio are you using, what cable are you using, what connectors are you
> using and how long are your feed lines?
>
> If you want I will sell you my SSB SP 200 100W pass through RF sensing 2m pre
> amp at $300 to help offset my cost of buying a new SP70. It's been used for
> just 3hrs last January, though I suggest you minimize all losses first, that
> is a lot cheaper.
>
> 73
> John
> KM4KMU
> On Thursday, December 12, 2019 Al Wells <kb3sig@gmail.com> wrote:
> A lot of the FM & repeater guys use Ar² LNA's.
>
> http://www.advancedreceiver.com/
>
> Al KB3SIG
>
>> On 12/11/2019 9:58 PM, Gregory Winters wrote:
>> I'd like to enhance 2m simplex abilities and pull in weaker SOTA activators.
>> Often times they hear me but I do not hear them. Increasing my antenna
>> capability would help (of course). But I can't run a beam mobile.
>>
>> I'm looking for a reasonable LNA to pull out these weaker ones on 146.52,
>> etc. But many of the LNAs I see are for the SSB side of things.
>>
>> Is there a LNA that I could use for FM?
>>
>> Ideally I'd be able to use it mobile too. I run 65w on a 5/8s whip,
>> seemingly everyone hears me, but I struggle to hear some of them. The
>> Kenwood 2m mobile has an awful NF I guess, so I am hoping a LNA can help
>> that.
>>
>> Ideas?
>>
>> Greg, K3RW
>> CN85ro
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