Hi Robert,
The FLEX-3000 will do 100W with a brick on the key so a little fan noise is
in order for a box this size. We pulse width modulate the fan based on the
PA transistor temperature so that it runs low speed in receive and then
modulates up with temperature. There is not much more we could do without
making the box a larger. Unfortunately, there are always tradeoffs in every
design.
Regards,
Gerald
Gerald Youngblood, K5SDR
President
FlexRadio Systems
13091 Pond Springs Rd. #250
Austin, TX 78729
Phone: 512-535-4713
www.flex-radio.com
"Tune in excitement!" (TM)
-Original Message-
From: flexradio-boun...@flex-radio.biz
[mailto:flexradio-boun...@flex-radio.biz] On Behalf Of Robert Wood
Sent: Wednesday, July 22, 2009 12:12 AM
To: flexradio@flex-radio.biz; flexra...@yahoogroups.com
Subject: Re: [Flexradio] Congrats to Flex on Stellar Review of Flex-3000-Fan
Noise
I hope that Peter's Fan noise comment will be heard..
Robert
- Original Message -
From: "Neal Campbell"
To: "flexradio@flex-radio.biz" ;
Sent: Tuesday, July 21, 2009 5:08 PM
Subject: [Flexradio] Congrats to Flex on Stellar Review of Flex-3000
My current issue of RadCom arrived today (my favorite ham mag) from
the RSGB and it has a 'Peter Hart' review of the 3000. I have
traditionally enjoyed Peter Hart's reviews more than any US magazine,
he seems to get to the point without a lot of tales of contest
adventures, etc. Also, he has reviewed the K3 and found it to be a
great radio, not a radio of the Gods.
If I might quote without getting sued:
"As might be expected, the overall operating experience was similar to
the FLEX-5000A. I found the on-air performance of the radio very
impressive. The receiver sounded very clean and low noise. The audio
quality is excellent and the filter arrangements are really effective.
There is no click when the headphones are connected: this problem with
the FLEX-5000a has been fixed. The panadapter display adds another
dimension to tuning and keeps you aware of signals on adjacent
channels. DSP noise reduction, noise blanking and other receiver
features all worked very well indeed. I did not experience any
problems due to intermodulation or overload but images could be heard
from strong broadcasters and strong amateur stations. The ability to
receive on two channels simultaneously in stereo within the IF band
was excellent, just what is needed for DX split frequency working.
The autio quality on transmit using a Heil Handi Mic HM-5 was
excellent and CW effective but the fans seemed very noisy.
Its a matter of personal preference how you view the computer keyboard
as your sole interface to your radio. Some feel it is the way forward,
highly flexible and features such as point and click tuning enable
rapid frequency navigation. Others. including myself, prefer the
traditional approach with round knobs, switches and a good tuning
dial.
The Flex-3000 with PowerSDR software is a most impressinve radio.
Although some aspects of performance are not as good as the
FLEX-5000a, it is nevertheless an excellent performer and a
significant price saving over its larger brother. There has been a
substantial price increase over the last year on many US products. The
FLEX-3000 is priced at 1395 pounds inc. VAT, almost half the current
price of the FLEX-5000a with ATU."
Neal Campbell
Abroham Neal Software
Programming Services for Windows, OS X and Linux
www.abrohamnealsoftware.com
(540) 242 0911
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