Re: [Elecraft] KX3 2m external amplifier

[Petr, OK1RP/M0SIS]

Dear Tim

where did you bought these 320Gs please? I am looking for them too but no
luck here in EU.

Thanks,



-
73 - Petr, OK1RP 
"Apple & Elecraft freak" 
B:http://ok1rp.blogspot.com
G+:http://goo.gl/w3u2s9
G+: http://goo.gl/gP99xq
--
Sent from: http://elecraft.365791.n2.nabble.com/
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Re: [Elecraft] KX3 2m external amplifier

[Jim Brown]

That would be great, Mel.

I think I probably have about 8 brick amps of this generation carrying 
the Mirage and RF Concepts nameplate. Up to now, I've never looked at 
their spectral performance, and I don't have an easy way to do so with 
the frequency resolution of the P3, because I have only one 2M CW 
transceiver. OTOH, I could probably borrow a second one from W6GJB.


The most practical test I currently know of for IM performance is 
transmitting CW dits in the range of 35WPM and looking at the occupied 
bandwidth on a P3 with a display bandwidth on the order of 10 kHz.


73, Jim

On Fri,7/29/2016 12:57 PM, Mel Farrer wrote:
If anyone needs information on the older KLM/Mirage amplifiers, I have 
some of the original documentation when I was at KLM/Mirage in the 
'70/'80 time period. Would be glad to share.


Mel, K6KBE
One of the founders of KLM Electronics



*From:* Jim Brown <j...@audiosystemsgroup.com>
*To:* elecraft@mailman.qth.net
*Sent:* Friday, July 29, 2016 12:15 PM
*Subject:* Re: [Elecraft] KX3 2m external amplifier

On Fri,7/29/2016 10:31 AM, Ron D'Eau Claire wrote:
> Are those capable of linear operation for SSB as the poster asked? 
The ones

> I had back then were non-linear (class C) strictly for FM/CW only.

CW is 100% modulation of a carrier by a rectangular wave, so the
harmonics associated with rise and fall times create at least as much
distortion as SSB. That distortion shows up in the form of clicky
sidebands. It's quite easy to see these sidebands on a P3. Here's some
work I did a year or two ago measuring some rigs that were available 
to me.


http://k9yc.com/P3_Spectrum_Measurements.pdf

The second file contains much of the same data, but focuses on
improvements made by firmware upgrades to the FTDX5000 a year or two ago.

http://k9yc.com/FTDX5000_Report.pdf


73, Jim K9YC

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Re: [Elecraft] KX3 2m external amplifier

[Mel Farrer via Elecraft]

If anyone needs information on the older KLM/Mirage amplifiers, I have some of 
the original documentation when I was at KLM/Mirage in the '70/'80 time period. 
Would be glad to share.

Mel, K6KBEOne of the founders of KLM Electronics


  From: Jim Brown <j...@audiosystemsgroup.com>
 To: elecraft@mailman.qth.net 
 Sent: Friday, July 29, 2016 12:15 PM
 Subject: Re: [Elecraft] KX3 2m external amplifier
   
On Fri,7/29/2016 10:31 AM, Ron D'Eau Claire wrote:
> Are those capable of linear operation for SSB as the poster asked? The ones
> I had back then were non-linear (class C) strictly for FM/CW only.

CW is 100% modulation of a carrier by a rectangular wave, so the 
harmonics associated with rise and fall times create at least as much 
distortion as SSB. That distortion shows up in the form of clicky 
sidebands. It's quite easy to see these sidebands on a P3. Here's some 
work I did a year or two ago measuring some rigs that were available to me.

http://k9yc.com/P3_Spectrum_Measurements.pdf

The second file contains much of the same data, but focuses on 
improvements made by firmware upgrades to the FTDX5000 a year or two ago.

http://k9yc.com/FTDX5000_Report.pdf

73, Jim K9YC

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Re: [Elecraft] KX3 2m external amplifier

[Jim Brown]

On Fri,7/29/2016 10:31 AM, Ron D'Eau Claire wrote:

Are those capable of linear operation for SSB as the poster asked? The ones
I had back then were non-linear (class C) strictly for FM/CW only.


CW is 100% modulation of a carrier by a rectangular wave, so the 
harmonics associated with rise and fall times create at least as much 
distortion as SSB. That distortion shows up in the form of clicky 
sidebands. It's quite easy to see these sidebands on a P3. Here's some 
work I did a year or two ago measuring some rigs that were available to me.


http://k9yc.com/P3_Spectrum_Measurements.pdf

The second file contains much of the same data, but focuses on 
improvements made by firmware upgrades to the FTDX5000 a year or two ago.


http://k9yc.com/FTDX5000_Report.pdf

73, Jim K9YC

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Re: [Elecraft] KX3 2m external amplifier

[Mel Farrer via Elecraft]

All of the Mirage amplifiers called linear were just that.  Only special order 
FM repeater amplifiers could be Class C.
Mel, K6KBE


  From: Ron D'Eau Claire <r...@cobi.biz>
 To: elecraft@mailman.qth.net 
 Sent: Friday, July 29, 2016 10:31 AM
 Subject: Re: [Elecraft] KX3 2m external amplifier
   
Are those capable of linear operation for SSB as the poster asked? The ones
I had back then were non-linear (class C) strictly for FM/CW only. 

73, Ron AC7AC

-Original Message-

Several years ago, we searched for and acquired vintage (30 year old) brick
amps that drive with either 2W or 10W for an output of about 150W. 
They have built-in preamps. These vintage amps were made during the 70s and
80s with the Mirage and RF Concepts name, and were built in Northern
California. They also made versions of these amps that required higher drive
levels -- 30W and 50W, I think, and they also made versions for
440 MHz. I own some of those too, which I use with the FM rig in my shack.
The Mirage name was later bought by MFJ. We found four of these vintage amps
in good condition in a few days simply by asking on two local club
reflectors. I don't remember what we paid, but I do know that we considered
them a bargain. :)

Those older amps are a great fit to an Elecraft rig with an Elecraft
transverter. We use the version that drives with 2W so that we can run the
transverter at the lowest possible power, thus reducing heat.

73, Jim K9YC


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Re: [Elecraft] KX3 2m external amplifier

[Ron D'Eau Claire]

Are those capable of linear operation for SSB as the poster asked? The ones
I had back then were non-linear (class C) strictly for FM/CW only. 

73, Ron AC7AC

-Original Message-

Several years ago, we searched for and acquired vintage (30 year old) brick
amps that drive with either 2W or 10W for an output of about 150W. 
They have built-in preamps. These vintage amps were made during the 70s and
80s with the Mirage and RF Concepts name, and were built in Northern
California. They also made versions of these amps that required higher drive
levels -- 30W and 50W, I think, and they also made versions for
440 MHz. I own some of those too, which I use with the FM rig in my shack.
The Mirage name was later bought by MFJ. We found four of these vintage amps
in good condition in a few days simply by asking on two local club
reflectors. I don't remember what we paid, but I do know that we considered
them a bargain. :)

Those older amps are a great fit to an Elecraft rig with an Elecraft
transverter. We use the version that drives with 2W so that we can run the
transverter at the lowest possible power, thus reducing heat.

73, Jim K9YC


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Re: [Elecraft] KX3 2m external amplifier

[Edward R Cole]

Thanks to Mike and Bill for buying my 2M80 amps (assembled or partial 
kit).  I built twelve amps so far and most were to be driven by KX3's 
with 2M module.  I set nearly all amps to be driven by 1.5-2.0w so 
the KX3-2M would not have to run full power.  The 80w RF module that 
is used is not in production so now limited quantities available 
(from RFParts).  I have identified a replacement power module which 
should run 60-70w.


But there are quite few surplus 2m linear amps available.  Mirage, TE 
Systems, and RFConcepts.  I have a RFC 2-23 linear which runs 2w/30w 
and RFC 3-17 linear which runs 40w/170w.  I have three 2m sources: an 
old FT736R (30w), DEMI 28-144 HP (50w) and the KX3-2M which not up to 
stuff running only 1.5w.  I use either the RFC 2-23 or a surplus MOT 
amp that runs 1w/60w (FM) with my KX3-2M.


I am not taking orders for a couple months as I am working on some of 
my own projects while summer wx is still here:
6m 1kW amp and possibly building a new 18x26 foot ham shack which 
will require running all new cables to my four towers and dish.  Take 
a look at the amps here: http://www.kl7uw.com/kits.htm


73, Ed
--

Ed, KL7UW, built me a nice 80w 2m amp for less than $400.
http://www.kl7uw.com

Mike


In a message dated 7/28/2016 12:54:12 P.M. Eastern Daylight Time,
dhand...@plantron.se writes:

Does  anyone use a KX3 + internal 2m transverter with an external amplifier?
I am  looking for any recommendations. I have looked at RM Italy LA-144
and  Mirage B-34-G. My intention is to use it with both FM and SSB. Does
anyone  have experience with one of these amplifiers?
--
73, Dirk  SA4DHT



73, Ed - KL7UW
http://www.kl7uw.com
"Kits made by KL7UW"
Dubus Mag business:
dubus...@gmail.com

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Re: [Elecraft] KX3 2m external amplifier

[Tim Tucker]

You can call the owner and talk to him yourself and make your own
determination on where they're made.  He has his name, address, and email
address right there - email and ask for his phone number.  I know quite a
few people (including myself) that have purchased several of those power
supplies direct from him and have not had any problem with RFI.  I have
also purchased one of the chinese versions that look the same and threw it
out almost immediately because it was so bad.  If you bought one direct
from him that was noisy, I'd call him up and send it back for him to
replace to test out his advertised 2 year warranty.

On Thu, Jul 28, 2016 at 5:44 PM, Josh Fiden  wrote:

> While I don't doubt that you're successfully using these, I previously
> looked into these supplies and find the claim that they are made in
> California to be highly questionable. At the least, I don't see where the
> products are marked "Made in USA" nor does it say this anywhere that I can
> find on their web site. They refer to copies as "offshore clones" and so
> on, but no where do they refer to their own supplies as made here. Selling
> 30A supplies for $50 full of hand inserted through hole components, it
> seems frankly impossible that they are manufactured using California labor.
>
> If you have information to the contrary, please post as I'd love to be
> wrong. Since we all own Elecraft gear, I'm guessing that many have the same
> strong preference for USA made products that I do.
>
> 73,
> Josh W6XU
>
> On 7/28/2016 5:00 PM, Tim Tucker wrote:
>
>> Not difficult to power, at all.  Just buy two of these 50 amp units and
>> run
>> them in parallel.  I've personally tested these in my shack and they work
>> great.  No RF hash visible on the panadapter on any band that I run.  And
>> they're made right here in California:
>>
>> http://www.12voltpowersupplies.us/
>>
>>
>>
>>
>>
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>



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Re: [Elecraft] KX3 2m external amplifier

[Jim Cox]

Thanks Jim for the information.  I certainly don’t want one of them in my 
shack.  Have used Astron PS for many years with excellent results, power and 
RFI wise..

73s Jim K4JAF

-Original Message- 
From: Jim Brown

Sent: Thursday, July 28, 2016 7:34 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KX3 2m external amplifier

On the recommendation of someone on this list, about a year ago I bought
one of the 350-12 units. It came with no documentation, and no
certification of compliance with anything. It is VERY NOISY, and nothing
I have tried has been able to make a dent in the noise.  Multiple chokes
on AC, multiple chokes on DC, and bypass caps on both AC and DC. It's
currently sitting on the shelf in my store room.

73, Jim K9YC

On Thu,7/28/2016 5:00 PM, Tim Tucker wrote:
Not difficult to power, at all.  Just buy two of these 50 amp units and 
run

them in parallel.  I've personally tested these in my shack and they work
great.  No RF hash visible on the panadapter on any band that I run.  And
they're made right here in California:

http://www.12voltpowersupplies.us/



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Re: [Elecraft] KX3 2m external amplifier

[Josh Fiden]

While I don't doubt that you're successfully using these, I previously 
looked into these supplies and find the claim that they are made in 
California to be highly questionable. At the least, I don't see where 
the products are marked "Made in USA" nor does it say this anywhere that 
I can find on their web site. They refer to copies as "offshore clones" 
and so on, but no where do they refer to their own supplies as made 
here. Selling 30A supplies for $50 full of hand inserted through hole 
components, it seems frankly impossible that they are manufactured using 
California labor.


If you have information to the contrary, please post as I'd love to be 
wrong. Since we all own Elecraft gear, I'm guessing that many have the 
same strong preference for USA made products that I do.


73,
Josh W6XU

On 7/28/2016 5:00 PM, Tim Tucker wrote:

Not difficult to power, at all.  Just buy two of these 50 amp units and run
them in parallel.  I've personally tested these in my shack and they work
great.  No RF hash visible on the panadapter on any band that I run.  And
they're made right here in California:

http://www.12voltpowersupplies.us/






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Re: [Elecraft] KX3 2m external amplifier

[Clay Autery]

Thanks Jim...  I was going to try one of those to test the claims
made...  Even had someone offer to pay me my cost +$10 if I decided I
didn't want it after testing...

The business owner claims they are "quiet" and says there are
"counterfeits" being passed off as "his" power supplies.

Really would be nice to have a SMPS that was quiet, modular, and able to
be put in parallel for more power out...

__
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389

On 7/28/2016 7:34 PM, Jim Brown wrote:
> On the recommendation of someone on this list, about a year ago I
> bought one of the 350-12 units. It came with no documentation, and no
> certification of compliance with anything. It is VERY NOISY, and
> nothing I have tried has been able to make a dent in the noise. 
> Multiple chokes on AC, multiple chokes on DC, and bypass caps on both
> AC and DC. It's currently sitting on the shelf in my store room.
>
> 73, Jim K9YC
>
> On Thu,7/28/2016 5:00 PM, Tim Tucker wrote:
>> Not difficult to power, at all.  Just buy two of these 50 amp units
>> and run
>> them in parallel.  I've personally tested these in my shack and they
>> work
>> great.  No RF hash visible on the panadapter on any band that I run. 
>> And
>> they're made right here in California:
>>
>> http://www.12voltpowersupplies.us/
>
>
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Re: [Elecraft] KX3 2m external amplifier

[Jim Brown]

On the recommendation of someone on this list, about a year ago I bought 
one of the 350-12 units. It came with no documentation, and no 
certification of compliance with anything. It is VERY NOISY, and nothing 
I have tried has been able to make a dent in the noise.  Multiple chokes 
on AC, multiple chokes on DC, and bypass caps on both AC and DC. It's 
currently sitting on the shelf in my store room.


73, Jim K9YC

On Thu,7/28/2016 5:00 PM, Tim Tucker wrote:

Not difficult to power, at all.  Just buy two of these 50 amp units and run
them in parallel.  I've personally tested these in my shack and they work
great.  No RF hash visible on the panadapter on any band that I run.  And
they're made right here in California:

http://www.12voltpowersupplies.us/



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Re: [Elecraft] KX3 2m external amplifier

[Tim Tucker]

Not difficult to power, at all.  Just buy two of these 50 amp units and run
them in parallel.  I've personally tested these in my shack and they work
great.  No RF hash visible on the panadapter on any band that I run.  And
they're made right here in California:

http://www.12voltpowersupplies.us/





On Thu, Jul 28, 2016 at 2:12 PM, Josh  wrote:

> Difficult to power, need a stiff supply that does 60A. Great amp but know
> what you're getting into.
>
> 73,
> Josh W6XU
>
> Sent from my mobile device
>
> > On Jul 28, 2016, at 12:58 PM, Charlie T, K3ICH  wrote:
> >
> > My TE Systems 1452G amp puts out a tad under 400 watts with 4 watts
> drive.
> > AND it is biased for linear service.
> >
>
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Re: [Elecraft] KX3 2m external amplifier

[Robin Moseley]

Get a Gemini SSPAhttp://www.linamp.co.uk/gemini_2.html

Robin G1MHU 
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Re: [Elecraft] KX3 2m external amplifier

[Mike via Elecraft]

Ed, KL7UW, built me a nice 80w 2m amp for less than $400.  
http://www.kl7uw.com
 
Mike
 
 
In a message dated 7/28/2016 12:54:12 P.M. Eastern Daylight Time,  
dhand...@plantron.se writes:

Does  anyone use a KX3 + internal 2m transverter with an external amplifier?
I am  looking for any recommendations. I have looked at RM Italy LA-144
and  Mirage B-34-G. My intention is to use it with both FM and SSB. Does
anyone  have experience with one of these amplifiers?
-- 
73, Dirk  SA4DHT

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Re: [Elecraft] KX3 2m external amplifier

[Josh]

Difficult to power, need a stiff supply that does 60A. Great amp but know what 
you're getting into. 

73,
Josh W6XU

Sent from my mobile device

> On Jul 28, 2016, at 12:58 PM, Charlie T, K3ICH  wrote:
> 
> My TE Systems 1452G amp puts out a tad under 400 watts with 4 watts drive.
> AND it is biased for linear service.
> 

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Re: [Elecraft] KX3 2m external amplifier

[Wes Stewart]

K6PF on the CADXA Yahoo group is advertising (among other things) .

TE Systems 1410-G for 2m.  Xlnt condx.  10W in / 160W out.  Will drive above 
8877 HPA to legal limit pwr output with abt 7W.  Has built-in preamp.  Includes 
manual & schematic. Asking $225.



On 7/28/2016 12:08 PM, Mel Farrer via Elecraft wrote:

Any of the older ones rated at less than 10 watt in and a linear version not 
Class C will be fine.  I have used the KLM, Mirage and TPL units with success 
on two meters with various rigs both FM and SSB.  There are quite a few on the 
used market, just make sure it still works as advertised for rated output.

Good luck.
Mel, K6KBE
One of the founders of KLM Electronics


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Re: [Elecraft] KX3 2m external amplifier

[Bill Frantz]

I have a 2M amp about 80 watts from Edward R Cole, KL6UW. I 
drive it with my 5W HT. It seems to work well, although I just 
got it working a month or so ago and have been away most of the 
time since. Note that Ed will set it up for the drive level you need.


Pluses: Solidly built. Automatic T/R switching, or by control wire.

Minuses: Little/no protective circuity. Class A so it draws a 
lot of power with no input.


I built mine as a kit and it was a fun build. Since I was an 
early adopter, I asked Ed a lot of questions and got very useful 
support throughout the process.


73 Bill AE6JV

On 7/28/16 at 9:50 AM, dhand...@plantron.se (Dirk Handzic) wrote:


Does anyone use a KX3 + internal 2m transverter with an external amplifier?
I am looking for any recommendations. I have looked at RM Italy LA-144
and Mirage B-34-G. My intention is to use it with both FM and SSB. Does
anyone have experience with one of these amplifiers?

---
Bill Frantz| "The only thing we have to   | Periwinkle
(408)356-8506  | fear is fear itself." - FDR  | 16345 
Englewood Ave
www.pwpconsult.com | Inaugural address, 3/4/1933  | Los Gatos, 
CA 95032


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Re: [Elecraft] KX3 2m external amplifier

[Charlie T, K3ICH]

My TE Systems 1452G amp puts out a tad under 400 watts with 4 watts drive.
AND it is biased for linear service.

73, Charlie k3ICH



-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Josh
Fiden
Sent: Thursday, July 28, 2016 3:34 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KX3 2m external amplifier

I've been very happy with a vintage RF Concepts 2-417. It's rated for 170W
out with 45W drive. However, I used it very successfully driving it from my
TH-F6A 5W HT. I never measured the output with that drive, but it was
clearly considerable. Also, the preamp is quite good. These are readily
available used, best guess is price around $175-250 for one in good condx.

73,
Josh W6XU


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Re: [Elecraft] KX3 2m external amplifier

[Josh Fiden]

I've been very happy with a vintage RF Concepts 2-417. It's rated for 
170W out with 45W drive. However, I used it very successfully driving it 
from my TH-F6A 5W HT. I never measured the output with that drive, but 
it was clearly considerable. Also, the preamp is quite good. These are 
readily available used, best guess is price around $175-250 for one in 
good condx.


73,
Josh W6XU


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Re: [Elecraft] KX3 2m external amplifier

[Mel Farrer via Elecraft]

Any of the older ones rated at less than 10 watt in and a linear version not 
Class C will be fine.  I have used the KLM, Mirage and TPL units with success 
on two meters with various rigs both FM and SSB.  There are quite a few on the 
used market, just make sure it still works as advertised for rated output.  

Good luck.
Mel, K6KBE 
One of the founders of KLM Electronics


  From: Clay Autery <caut...@montac.com>
 To: elecraft@mailman.qth.net 
 Sent: Thursday, July 28, 2016 11:20 AM
 Subject: Re: [Elecraft] KX3 2m external amplifier
   
I need one of those...  Adding 2m as soon as I can.

Can you give me some better info on that low drive unit, Jim?  Bet one
of the guys around here has one they aren't using...

__
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389

On 7/28/2016 12:09 PM, Jim Brown wrote:
> On Thu,7/28/2016 9:50 AM, Dirk Handzic wrote:
>> Does anyone use a KX3 + internal 2m transverter with an external
>> amplifier?
>
> My neighbor W6GJB and I both have K3s with Elecraft 2m transverters.
> His is internal, mine is external (I've owned it for more than ten
> years). Several years ago, we searched for and acquired vintage (30
> year old) brick amps that drive with either 2W or 10W for an output of
> about 150W. They have built-in preamps. These vintage amps were made
> during the 70s and 80s with the Mirage and RF Concepts name, and were
> built in Northern California. They also made versions of these amps
> that required higher drive levels -- 30W and 50W, I think, and they
> also made versions for 440 MHz. I own some of those too, which I use
> with the FM rig in my shack. The Mirage name was later bought by MFJ.
> We found four of these vintage amps in good condition in a few days
> simply by asking on two local club reflectors. I don't remember what
> we paid, but I do know that we considered them a bargain. :)
>
> Those older amps are a great fit to an Elecraft rig with an Elecraft
> transverter. We use the version that drives with 2W so that we can run
> the transverter at the lowest possible power, thus reducing heat.
>
> 73, Jim K9YC
>
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Re: [Elecraft] KX3 2m external amplifier

[Clay Autery]

I need one of those...  Adding 2m as soon as I can.

Can you give me some better info on that low drive unit, Jim?  Bet one
of the guys around here has one they aren't using...

__
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389

On 7/28/2016 12:09 PM, Jim Brown wrote:
> On Thu,7/28/2016 9:50 AM, Dirk Handzic wrote:
>> Does anyone use a KX3 + internal 2m transverter with an external
>> amplifier?
>
> My neighbor W6GJB and I both have K3s with Elecraft 2m transverters.
> His is internal, mine is external (I've owned it for more than ten
> years). Several years ago, we searched for and acquired vintage (30
> year old) brick amps that drive with either 2W or 10W for an output of
> about 150W. They have built-in preamps. These vintage amps were made
> during the 70s and 80s with the Mirage and RF Concepts name, and were
> built in Northern California. They also made versions of these amps
> that required higher drive levels -- 30W and 50W, I think, and they
> also made versions for 440 MHz. I own some of those too, which I use
> with the FM rig in my shack. The Mirage name was later bought by MFJ.
> We found four of these vintage amps in good condition in a few days
> simply by asking on two local club reflectors. I don't remember what
> we paid, but I do know that we considered them a bargain. :)
>
> Those older amps are a great fit to an Elecraft rig with an Elecraft
> transverter. We use the version that drives with 2W so that we can run
> the transverter at the lowest possible power, thus reducing heat.
>
> 73, Jim K9YC
>
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Re: [Elecraft] KX3 2m external amplifier

[Tim Tucker]

I've used mine with the Mirage B-320-G quite a lot.  It works great, both
FM and SSB with no issues.  I've also used it with a little Tokyo Hi-Power
35 watt amp and had no issues, either.  There really isn't anything
complicated about getting the KX3 2m going with any amplifier - just make
sure the one you choose will deliver the power you're looking for with 3
watts or less input.

Tim
AE6LX

On Thu, Jul 28, 2016 at 9:50 AM, Dirk Handzic  wrote:

> Does anyone use a KX3 + internal 2m transverter with an external amplifier?
> I am looking for any recommendations. I have looked at RM Italy LA-144
> and Mirage B-34-G. My intention is to use it with both FM and SSB. Does
> anyone have experience with one of these amplifiers?
> --
> 73, Dirk SA4DHT
>
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> Message delivered to ae...@worldwidedx.com
>



-- 
Owner, worldwidedx.com
AE6LX, Amateur Radio
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Re: [Elecraft] KX3 2m external amplifier

[Jim Brown]

On Thu,7/28/2016 9:50 AM, Dirk Handzic wrote:

Does anyone use a KX3 + internal 2m transverter with an external amplifier?


My neighbor W6GJB and I both have K3s with Elecraft 2m transverters. His 
is internal, mine is external (I've owned it for more than ten years). 
Several years ago, we searched for and acquired vintage (30 year old) 
brick amps that drive with either 2W or 10W for an output of about 150W. 
They have built-in preamps. These vintage amps were made during the 70s 
and 80s with the Mirage and RF Concepts name, and were built in Northern 
California. They also made versions of these amps that required higher 
drive levels -- 30W and 50W, I think, and they also made versions for 
440 MHz. I own some of those too, which I use with the FM rig in my 
shack. The Mirage name was later bought by MFJ. We found four of these 
vintage amps in good condition in a few days simply by asking on two 
local club reflectors. I don't remember what we paid, but I do know that 
we considered them a bargain. :)


Those older amps are a great fit to an Elecraft rig with an Elecraft 
transverter. We use the version that drives with 2W so that we can run 
the transverter at the lowest possible power, thus reducing heat.


73, Jim K9YC

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[Elecraft] KX3 2m external amplifier

[Dirk Handzic]

Does anyone use a KX3 + internal 2m transverter with an external amplifier?
I am looking for any recommendations. I have looked at RM Italy LA-144
and Mirage B-34-G. My intention is to use it with both FM and SSB. Does
anyone have experience with one of these amplifiers?
-- 
73, Dirk SA4DHT

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