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Author Topic: Flex Radio 1500  (Read 2927 times)
KI6PDQ
Member

Posts: 28




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« on: September 28, 2009, 07:39:07 PM »

http://www.flex-radio.com//Products.aspx?topic=F1.5k_features

I Think this is the QRP radio I have been waiting for, what do you think?
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WD4ELG
Member

Posts: 875




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« Reply #1 on: September 28, 2009, 08:11:05 PM »

Well, the Flex experience is a complete paradigm shift.

W9OY has discussed this on his blog:

http://w9oy-sdr.blogspot.com/

I also presented some ideas on it

http://wd4elg.blogspot.com/2009_08_01_archive.html

It's not just the QRP rig that you will be getting.

It's the SDR experience that you are buying.

See if you can get someone near your QTH to demo an SDR radio.  It will change how you think about the hobby.  Then you will KNOW that the 1500 is for you.
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K3ROJ
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Posts: 20


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« Reply #2 on: November 30, 2009, 01:12:40 PM »

I already own a Flex 5000A but need something with accurate frequency capability to use in the field.  Just ordered the 1500 to work out something for my VHF/UHF/Microwave portable setup.  With a GPS controlled frequency reference (10MHz) for the 1500, it will be laboratory grade but finding a means to lock in transverters such as the Elecraft XV144 etc will be difficult. As far as the 1296 band and up, JWM Engineering sells great PLL oscillators that require a 10 MHz reference but then again, the 144 MHz driving transverter would require the same.  If I could find someone that makes a 116 MHz oscillator controlled by a reference, I will be in business.
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KP4MD
Member

Posts: 6




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« Reply #3 on: July 05, 2013, 10:54:25 PM »

I have achieved frequency stability to 1 Hz with the Flex-1500 & Elecraft XV144 transverter combination, using a GPS disciplined OCXO on 116 MHz. I have documented the XV144 frequency stability and drift data comparing the GPS control against the stock crystal oven option with enhanced thermal insulation here
https://picasaweb.google.com/114032640816757126398/XV144FrequencyStabilityModifications

The stock FLEX-1500 TCXO is sufficient to hold the frequency to within 1 Hz. Enabling the 10 MHz sine wave external reference on the FLEX-1500 should increase the frequency accuracy and stability to the millihertz range.

The GPS reference we used was engineered by N6GN specifically for members of our 2 meter WSPR study group listed on http://www.qsl.net/kp4md/144_mhz_wspr.htm
That discussion thread can be followed at
https://groups.google.com/forum/#!topic/2-meter-wspr/-hDK071K1iM

A ready made solution to produce a 116 MHz local oscillator locked to a 10 MHz GPS disciplined reference is N5AC's VHF ApolLO at
http://www.n5ac.com/blog/products-page/apollo-synthesizers/vhf-apollo-assembled-tested/

Carol KP4MD
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