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6 meter output

 

Thinking about buying a LA-1k? ?What power output should I expect on 6 meters? I will running on 120 volts.
 

Too bad you don't have an electric stove close by to tap into the 220.

I get about 900 out pretty easy with a 1:1 swr on 6 meters and about 45 watts in.

Paul


On Sun, Jun 28, 2020, 12:02 PM Steve Shep <shepsvettes@...> wrote:
Thinking about buying a LA-1k? ?What power output should I expect on 6 meters? I will running on 120 volts.

 

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I get 1k out with mine on 240v.


On Jun 28, 2020, at 12:02 PM, Steve Shep <shepsvettes@...> wrote:

?Thinking about buying a LA-1k? ?What power output should I expect on 6 meters? I will running on 120 volts.

 

Before I ran my 240V line, on a pretty heavily used 120 circuit, my whole shack with computers and audio gear on it, I was getting 700 out before it would shut down from the sag (never blew the breaker). It’s worth putting a 240V line in but this amp is impressively efficient with the power draw.?

On Sun, Jun 28, 2020 at 5:30 PM Barry <barplo@...> wrote:
I get 1k out with mine on 240v.


On Jun 28, 2020, at 12:02 PM, Steve Shep <shepsvettes@...> wrote:

?Thinking about buying a LA-1k? ?What power output should I expect on 6 meters? I will running on 120 volts.

--
73? de?Chris?-- KC2RGW

------------------------------------------------------------
˙dn ?p?s ????? ?o??uo? ?no? u?n?
?s???d 's??? ?u?p??? ??? no? ??
 

Think I figured out a way to have 220volts.looking forward to using the amplifier. I ORDERED IT today but there backordered.
 

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Backordered? Wow, i,heard they were selling alot during covid. Good news.?


On Jun 29, 2020, at 6:15 PM, Steve Shep <shepsvettes@...> wrote:

?Think I figured out a way to have 220volts.looking forward to using the amplifier. I ORDERED IT today but there backordered.

 

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I run temporary on 120v and get 400w out easy.?

On Jun 29, 2020, at 7:14 PM, Steve Shep <shepsvettes@...> wrote:

Think I figured out a way to have 220volts.looking forward to using the amplifier. I ORDERED IT today but there backordered.

 

I had to search to find one in stock a month and a half ago.
 

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I order the LA-1K and HF Tune direct from Palstar on Thursday June 11 and it arrive at my doorstep on Tuesday June 16th. I guess I was one of the lucky ones. ?

On Jun 29, 2020, at 8:51 PM, davenlr@... wrote:

I had to search to find one in stock a month and a half ago.

 

Having this Amp up and running for a couple months, using only 110V, I can tell you that 220 is the way to go.?
This amp has given me 1000-1200 W output with 110V, but not for very long.? Not only will the amp shut off if you
exceed the current cut-off (whatever it is, I think probably somewhere around 30-33A), but when I have tried to drive
the amp toward 1KW a time or 2, it shut down my 35A 12V power supply running my FlexRadio and the Palstar HF-Auto Tuner.
Tuner and the Flex would not power up again until something reset.? Flex support suggested to go with 220V for the LA-1K as it would
be on a separate circuit than the other stuff.? Plus with 220V the current will be less compared to 110V.? ?So I'm not near a stove, but
will get a 220 line installed, very soon. Until then I'm reluctant to run amp over 500-600 watts. Only takes 21w transceiver drive to get 500w
out of the amp.? ?Hope you get yours soon!? ? ?73 de W8RBD
 

Also what is the pure signal jack for.
 

Back to the "Six meter output" subject first....
??? This amp is VERY efficient on 6 meters... around 72% is what I measured here on two of them.?? What this means is that you will easily get 1kw of output on 6-meters SSB with a stout 120v supply voltage.? I wouldn't be surprised if you could do CW or FM at 1 kw.?? This assumes you have a good stout 12vac main circuit.? A whimpy one with a long run of small wire won't cut it, but something up to code should work fine.? These LDMOS devices really start to "sing" at VHF so their efficiency is way up by 50mhz as opposed to mid to low 50s at HF so the demands on the AC line are much less there.
?? The "Pure Signal" jack is for very modern transceivers which employ a circuit that cuts transmit IMD by about 20 or 30db.?? It basically takes a sample of the transmitted signal from your amp via that Pure Signal port, feeds it back to the transceiver which instantly generates a signal 180-degrees out of phase to cancel the undesired IMD out of your passband.? Pretty much the only radio that commonly does this are the various Anan models.
?? Congrats on ordering one, both of mine work well.
Dennis
N0SP

On 6/29/2020 at 9:31 PM, "Steve Shep" <shepsvettes@...> wrote:
Also what is the pure signal jack for.

 

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I’m not an electrician, but a 500 watt amp seems to be the limit for ?a 120-volt line while ?a 1000 watt and above amp needs 240-volts.

My KPA500 gives reliable service from its own 120-volt circuit, while a Quadra, LA-1K, and 1.5K-FA are happy on a 240-volt line.

I tumbled to this truth early on (at age 16 in 1961) when a Gonset GSB-101 dimmed every light in the house and periodically blew the glass fuse to my shack/bedroom’s window air-conditioner when run from what was then 110-volts. ?I’d cool the room ahead of time and then leave the air-conditioner off while I operated. ?

Having an HQ-170C and GSB-100 plugged into the same outlet was not the smartest thing I ever did either.

73,

Kent ?K9ZTV

On Jun 29, 2020, at 10:28 PM, Bob W8RBD <dushkoff@...> wrote:

Having this Amp up and running for a couple months, using only 110V, I can tell you that 220 is the way to go.?
This amp has given me 1000-1200 W output with 110V, but not for very long.? Not only will the amp shut off if you
exceed the current cut-off (whatever it is, I think probably somewhere around 30-33A), but when I have tried to drive
the amp toward 1KW a time or 2, it shut down my 35A 12V power supply running my FlexRadio and the Palstar HF-Auto Tuner.
Tuner and the Flex would not power up again until something reset.? Flex support suggested to go with 220V for the LA-1K as it would
be on a separate circuit than the other stuff.? Plus with 220V the current will be less compared to 110V.? ?So I'm not near a stove, but
will get a 220 line installed, very soon. Until then I'm reluctant to run amp over 500-600 watts. Only takes 21w transceiver drive to get 500w
out of the amp.? ?Hope you get yours soon!? ? ?73 de W8RBD

 

How long can you key down your 1K output on 120VAC?
When moving my shack to the house I put in 3 brand 120VAC
circuits plus one 220VAC circuit later after finding a 5 minute
Key down SSB period would give me 1K on 120 for less than
a minute, then around 650 for?another minute or so before
it shut down due to reaching 100C.

Please advise how long can you get 1K "keydown" with 120VAC?
We would all like to know.? Palstar engineering does not recommend
input to amp to get 1K out on 120VAC.

Just my 2 cents and 3 cents worth of experience. Who knows
maybe I don't know how to read meters after 40 years in the hobby,
KR9G

On Tue, Jun 30, 2020 at 8:00 AM Dennis via <pegasus9000=[email protected]> wrote:
Back to the "Six meter output" subject first....
??? This amp is VERY efficient on 6 meters... around 72% is what I measured here on two of them.?? What this means is that you will easily get 1kw of output on 6-meters SSB with a stout 120v supply voltage.? I wouldn't be surprised if you could do CW or FM at 1 kw.?? This assumes you have a good stout 12vac main circuit.? A whimpy one with a long run of small wire won't cut it, but something up to code should work fine.? These LDMOS devices really start to "sing" at VHF so their efficiency is way up by 50mhz as opposed to mid to low 50s at HF so the demands on the AC line are much less there.
?? The "Pure Signal" jack is for very modern transceivers which employ a circuit that cuts transmit IMD by about 20 or 30db.?? It basically takes a sample of the transmitted signal from your amp via that Pure Signal port, feeds it back to the transceiver which instantly generates a signal 180-degrees out of phase to cancel the undesired IMD out of your passband.? Pretty much the only radio that commonly does this are the various Anan models.
?? Congrats on ordering one, both of mine work well.
Dennis
N0SP

On 6/29/2020 at 9:31 PM, "Steve Shep" <shepsvettes@...> wrote:
Also what is the pure signal jack for.

 

I'm curious what you are running that runs that long at that high a duty cycle to drive the temp like that?

I run digital modes, things like PSK-31, JS8, Olivia, packet, Thor and for that I typically just run maybe 200W max due to duty cycle and definitely run transmissions that run for several minutes at a cycle but amp draw (amp indicated, believe it's the 50V supply reading)? is <12 when I run at that power level and temp stays generally 65 or lower.? In my case I'm on 240V.

For phone on SSB the temps are much lower when I'm running 800W (based on carrier tune to set drive level) or so output because voice is so much lower duty cycle. I've not seen temps with normal SSB voice even at 1kW output get much over 65C with fairly windy overs.

On Wed, Jul 1, 2020 at 12:37 PM Hobart Poyser <hobart1943@...> wrote:
How long can you key down your 1K output on 120VAC?
When moving my shack to the house I put in 3 brand 120VAC
circuits plus one 220VAC circuit later after finding a 5 minute
Key down SSB period would give me 1K on 120 for less than
a minute, then around 650 for?another minute or so before
it shut down due to reaching 100C.

Please advise how long can you get 1K "keydown" with 120VAC?
We would all like to know.? Palstar engineering does not recommend
input to amp to get 1K out on 120VAC.

Just my 2 cents and 3 cents worth of experience. Who knows
maybe I don't know how to read meters after 40 years in the hobby,
KR9G

On Tue, Jun 30, 2020 at 8:00 AM Dennis via <pegasus9000=[email protected]> wrote:
Back to the "Six meter output" subject first....
??? This amp is VERY efficient on 6 meters... around 72% is what I measured here on two of them.?? What this means is that you will easily get 1kw of output on 6-meters SSB with a stout 120v supply voltage.? I wouldn't be surprised if you could do CW or FM at 1 kw.?? This assumes you have a good stout 12vac main circuit.? A whimpy one with a long run of small wire won't cut it, but something up to code should work fine.? These LDMOS devices really start to "sing" at VHF so their efficiency is way up by 50mhz as opposed to mid to low 50s at HF so the demands on the AC line are much less there.
?? The "Pure Signal" jack is for very modern transceivers which employ a circuit that cuts transmit IMD by about 20 or 30db.?? It basically takes a sample of the transmitted signal from your amp via that Pure Signal port, feeds it back to the transceiver which instantly generates a signal 180-degrees out of phase to cancel the undesired IMD out of your passband.? Pretty much the only radio that commonly does this are the various Anan models.
?? Congrats on ordering one, both of mine work well.
Dennis
N0SP

On 6/29/2020 at 9:31 PM, "Steve Shep" <shepsvettes@...> wrote:
Also what is the pure signal jack for.



--
73? de?Chris?-- KC2RGW

------------------------------------------------------------
˙dn ?p?s ????? ?o??uo? ?no? u?n?
?s???d 's??? ?u?p??? ??? no? ??
 

Hobart,
?? I'm a little unclear from your email about the duty cycle you're running to get those temps.
To answer your first question; the "key down on 120V" is limited first by power supply current draw.? (on 120 the amperage is twice that of 240)? So 1kw on 120 would cause the amp to cut out in about 1/2-second.?? You should be able to run indefinitely on SSB, 120V, without getting close to exceeding any limits with a stout 120V circuit.?? The power supply electrolytics will hold the supply voltage up fine on SSB AS LONG AS the 120 voltage holds up to around 120/125, but if it's a weak circuit the voltage will drop considerably (10 to 15V) which will cause the amp to Current Fault off. ? The amp faults off due to excessive KEY DOWN current at or just below 1kw on a 120V circuit.? That shut-down mode is not due to temperature, but from the amperage going IN to the power supply.
?? Having said that, if you're really "hammering" it with audio (processor on, mic gain set too high) you could cause a current fault on 120V.? In normal SSB you should be able to run indefinitely without over-temping the amplifier regardless of supply voltage.
?? If your supply power is 240 or a really hot and strong 125v, it will do 1kw key down for maybe two minutes before getting too hot.?
Palstar's recommendation about 1kw being too much on 120 is sound advice.? The fact is that most 120V circuits in houses aren't robust enough to supply the current without excessive line-voltage drop causing the power fault.
Again, long-term "key down" time is limited by temperature, not supply voltage.? If your supply voltage is soft, it will fault off in less than a second.? If it stays on beyond that, then you become temp limited.? The time to reach temp limit time is determined by several things...
1) ambient temperature
2) altitude (air density)
3) band of operation, higher frequencies tend to be more efficient since less heat is generated.
?73,
Dennis

On 7/1/2020 at 11:19 AM, "Chris E." <kc2rgw@...> wrote:
I'm curious what you are running that runs that long at that high a duty cycle to drive the temp like that?

I run digital modes, things like PSK-31, JS8, Olivia, packet, Thor and for that I typically just run maybe 200W max due to duty cycle and definitely run transmissions that run for several minutes at a cycle but amp draw (amp indicated, believe it's the 50V supply reading)? is <12 when I run at that power level and temp stays generally 65 or lower.? In my case I'm on 240V.

For phone on SSB the temps are much lower when I'm running 800W (based on carrier tune to set drive level) or so output because voice is so much lower duty cycle. I've not seen temps with normal SSB voice even at 1kW output get much over 65C with fairly windy overs.

On Wed, Jul 1, 2020 at 12:37 PM Hobart Poyser <hobart1943@...> wrote:
How long can you key down your 1K output on 120VAC?
When moving my shack to the house I put in 3 brand 120VAC
circuits plus one 220VAC circuit later after finding a 5 minute
Key down SSB period would give me 1K on 120 for less than
a minute, then around 650 for?another minute or so before
it shut down due to reaching 100C.

Please advise how long can you get 1K "keydown" with 120VAC?
We would all like to know.? Palstar engineering does not recommend
input to amp to get 1K out on 120VAC.

Just my 2 cents and 3 cents worth of experience. Who knows
maybe I don't know how to read meters after 40 years in the hobby,
KR9G

On Tue, Jun 30, 2020 at 8:00 AM Dennis via <pegasus9000@...> wrote:
Back to the "Six meter output" subject first....
??? This amp is VERY efficient on 6 meters... around 72% is what I measured here on two of them.?? What this means is that you will easily get 1kw of output on 6-meters SSB with a stout 120v supply voltage.? I wouldn't be surprised if you could do CW or FM at 1 kw.?? This assumes you have a good stout 12vac main circuit.? A whimpy one with a long run of small wire won't cut it, but something up to code should work fine.? These LDMOS devices really start to "sing" at VHF so their efficiency is way up by 50mhz as opposed to mid to low 50s at HF so the demands on the AC line are much less there.
?? The "Pure Signal" jack is for very modern transceivers which employ a circuit that cuts transmit IMD by about 20 or 30db.?? It basically takes a sample of the transmitted signal from your amp via that Pure Signal port, feeds it back to the transceiver which instantly generates a signal 180-degrees out of phase to cancel the undesired IMD out of your passband.? Pretty much the only radio that commonly does this are the various Anan models.
?? Congrats on ordering one, both of mine work well.
Dennis
N0SP

On 6/29/2020 at 9:31 PM, "Steve Shep" <shepsvettes@...> wrote:
Also what is the pure signal jack for.



--
73? de?Chris?-- KC2RGW

------------------------------------------------------------
˙dn ?p?s ????? ?o??uo? ?no? u?n?
?s???d 's??? ?u?p??? ??? no? ??
 

What output does it do on 6 meter fm?
 

It will do rated output on 6 FM.?? But I'd watch the temps.? It actually runs a little cooler on 6 than on the HF bands.
Dennis

On 7/1/2020 at 5:36 PM, "Steve Shep" <shepsvettes@...> wrote:
What output does it do on 6 meter fm?

 

Going to install a 220v outlet tomorrow. SHould I go 20 or 30 aMP BREAKER 12-2 OR 10-2 WIRE?
 
Edited

I had an electrician do it. He used 2 20 amp breakers and 12 gauge wire. The draw is supposed to be max 10 amps on the LA-1K I believe?
?

On Jul 4, 2020, at 12:46, Steve Shep via groups.io <shepsvettes@...> wrote:

Going to install a 220v outlet tomorrow. SHould I go 20 or 30 aMP BREAKER 12-2 OR 10-2 WIRE?

--
73,
Jerry

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