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Author Topic: Flex 1.5kw Amp, new photo, more details...  (Read 32585 times)
N6YFM
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Posts: 832




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« on: December 03, 2016, 03:51:35 PM »

Finally, a photo of the redesigned chassis.
Still rather unconventional, but more specific details emerging...

http://qrznow.com/powergenius-xl-flexradio-1500w-solid-state-amplifier/

Neal
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VE7DQ
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Posts: 270




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« Reply #1 on: December 03, 2016, 04:04:22 PM »

100% duty cycle "Intermittent Commercial and Amateur Service"??   Huh

Sounds oxymoronic, like government intelligence.
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N6YFM
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Posts: 832




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« Reply #2 on: December 03, 2016, 04:11:20 PM »

That would be... "New Math"  :-)
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K6AER
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Posts: 5743




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« Reply #3 on: December 03, 2016, 04:23:20 PM »

The NXP 1K5H LDMOS devices are an interesting application for HF operation. The devices are designed for FM broadcast work with gains in the 23 dB region. At a rated output of 1500 watts for each device in the FM VHF band the gins will be lower in order to have a stable device operating over many octaves from 2-54 MHz.

IMD on the devices are listed for 30 dB respectfully. Note their original application is for broadcast FM. The devices run at 50 VDC. I am not sure what the circuit will be to aid the IMD products other than to conservative rate the output. No information is available on their application for linear operation in the HF band.

Flex runs a good engineering operation but this seems to be farmed out to a UK company.
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N6YFM
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« Reply #4 on: December 03, 2016, 04:49:49 PM »

Flex runs a good engineering operation but this seems to be farmed out to a UK company.

What made you think a U.K. company?  :-)

Flex is working with 4o3A;
4O3A Signature is a member of the Sky Sat Doo group. The factory is located in Montenegro.

Sales:   sales@4o3a.com
Technical support:   support@4o3a.com
Factory Address:   Ratisevina BB, 85347 Igalo, Montenegro

Sky Sat LLC Address:   RF Acquisitions International Inc.
784 Valley Court, Unit C3
Grand Junction CO 81505-8722 USA

Cheers
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KD0REQ
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Posts: 2404




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« Reply #5 on: December 03, 2016, 05:03:13 PM »

vapor-phase spec sheet. but Flex does bring radios to the table, so wait for certification and see what the final ratings are.
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W6RZ
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Posts: 365




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« Reply #6 on: December 04, 2016, 11:53:08 AM »

IMD on the devices are listed for 30 dB respectfully.

What data sheet did you get the 30 dB IMD specification from?

Is the actual device an MRF1K50HR5?
« Last Edit: December 04, 2016, 11:56:43 AM by W6RZ » Logged
WB8VLC
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Posts: 669




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« Reply #7 on: December 04, 2016, 12:21:24 PM »

I tested the original pre-prototype, PRFE6VP1K5, which recently became the 1K5 production device this past spring.

Stable 19db to 21 gain across 1 to 65 MHz but of course archaic FCC rules dictate that gain reduction be incorporated to maintain 15 db maximum for SALES in the US market.

The Flex offering should be capable of 2700 watts PEP if the FCC ever gives US hams the max power regulations that other countries have.

%eff was > 73% and 3rd order products were -36 dbc, (lowest, worst measured in hf range) at 1450 watts pep out.

Unlike earlier devices, MRFE6VP6300, MRFE6VP5600 AND the 1.25 k family which I have damaged at 2db overdrive, I haven't damaged any 1K5 devices at 3db overdrive and VDD OF 52 VOLTS.

Unfortunately with Qualcom purchasing NXP/FREESCALE and the possibility of any devices not for the 5g market going away I have now moved to Evaluating Ampleon devices.

Even after working for Motorola/Freescale RF POWER devices there comes a time when you have to face the facts that these parts probably won't be around in the near future.

Especially since most my old bosses and contacts at Freescale are no longer working at NXP/FREESCALE after the Qualcom/NXP MERGER I no longer have a good feeling that Qualcom will maintain the LDMOS DEVICE market below 1 GHZ.
« Last Edit: December 04, 2016, 12:29:34 PM by WB8VLC » Logged
KK4YDR
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Posts: 673




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« Reply #8 on: December 07, 2016, 11:38:40 AM »

I like it. I want one. Probably gonna be 6000 dollars easy. So my little humble al 800 h will have to suffice.

I like the modern green glow coming from it. I'm excited to see the final spec but how daggum long are they gonna be waiting on the Fed to evaluate the darn thing?
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VK3BL
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« Reply #9 on: December 07, 2016, 03:42:58 PM »

Marketing 1: "People over at eham don't like the case of the prototype, says it would look good next to a 1970s CB"
Marketing 2: "Get engineering to paint it black and put a green led in it, hams need their amps to glow"
Marketing 1: PowerGenius!

On a side note, I wonder how long it is till we get a "4Kw PEP" model from china with a non functioning 3-500ZG poking out the top and a dirty great big yellow LED in the socket to make it look like its adding "tube sound".
« Last Edit: December 07, 2016, 03:46:22 PM by VK3BL » Logged

J.D. Mitchell BA  - VK3BL / XU7AGA - https://www.youtube.com/ratemyradio - Honesty & Integrity
N6YFM
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Posts: 832




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« Reply #10 on: December 07, 2016, 08:07:44 PM »

On a side note, I wonder how long it is till we get a "4Kw PEP" model from china with a non functioning 3-500ZG poking out the top and a dirty great big yellow LED in the socket to make it look like its adding "tube sound".

I think you are describing current production 16-Pill "CB" Amps (sic) that are
being sold at Truck Stops all over USA :-)
The first 9 harmonics are down at least 1 db...
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WB0LJK
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Posts: 13




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« Reply #11 on: December 07, 2016, 10:56:48 PM »

"Full legal power 1500W (100% duty cycle ICAS), in all modes, up to 2000W"

This statement makes me question every claim they might have for this amplifier.
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ZS5WC
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« Reply #12 on: December 07, 2016, 11:57:03 PM »

 Grin really interesting!..
I like VK3BL's ideas, but an yellow LED lighting up the internals will do it for me!..haha.

73!..
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VK3BL
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« Reply #13 on: December 08, 2016, 01:06:29 AM »

"Full legal power 1500W (100% duty cycle ICAS), in all modes, up to 2000W"

This statement makes me question every claim they might have for this amplifier.

Why?

CCS means 24/7 operation, 365 days a year.
ICAS means perhaps weekly operation, or perhaps shorter life when ran continuously (in the days of tubes).

Its all about timeframes.  ICAS doesn't have to mean you can't run it at 100%, just that you can't do it 24/7/365.

Of course, there are certain products that do indeed take liberties with the notion of ICAS.  These products usually have an "IVS" rating... to my knowledge no power device manufacturer has ever rated a product for "IVS" usage.

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J.D. Mitchell BA  - VK3BL / XU7AGA - https://www.youtube.com/ratemyradio - Honesty & Integrity
G3RZP
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Posts: 1321




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« Reply #14 on: December 08, 2016, 02:19:01 AM »

ICAS ratings were introduced by RCA in the October 1939 RCA Ham Tips. It was expected that running at tube at ICAS ratings would give 50% of the life that would be obtained under CCS ratings - and it was pointed out that on CW, with the ratio of on to off, life was easier for the tube than the 100% carrier of CCS ratings.

So traditional ICAS ratings aren't applicable to solid state amplifiers. Thus the term is meaningless in its original definition and they need to say just what they mean by '100% duty cycle ICAS'.

The same arguments apply to IVS ratings - they meant something for tubes. They could mean much the same for a SS PA with a small heat sink, but it would need defining....
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