Ekola

,
prve preliminarne meritve Kenwood TS-590S z strani
Sherwood engineeringa:
==========================================================
Hello All,
Rob was kind enough to send me the following information in an email a few minutes ago.
The numbers are NOT FINAL TEST RESULTS - He still has a lot of testing to do before he puts the radio in his receiver test list.
While Rob lists the radios in order of Dynamic Range (Narrow Spaced) - There is of course more to a radio than JUST Dynamic Range!
It is important to remember he could have just as easily listed the radios in order of weight, size of VFO knob, or any other category.
For the average user who wants to get on air and have a chat and do a bit of DX...
there is probably very little discernible difference between the top 10 or 20 or even 30 radios on his list in reality.
While numbers tell one story - it is of course up to the user if a particular radio suits you or not.
Unless you're a serious contester - the numbers are interesting but not a sole reason to chose a particular radio in most cases.
Again, I stress these numbers are initial test results and are, I quote Rob... 'a work in progress'...
If he sends me anything else I'll let you all know in this thread.
73,
Craig - VK3VCM
-----------------------------------------------------------------------------------------
Sherwood Engineering HF Test Results
Model TS-590S Serial # B0A00386 Test Date: 12/15/2010
IF BW 2400 –6 / -60, Hz 2510/3590 Ultimate 100* dB
IF BW 500 –6 /-60, Hz 490/977 Ultimate 92* dB
* Phase noise limited, 2 to 4 filter bandwidths away
Front End Selectivity (A – F) B
First IF rejection 11374 kHz 77 dB
Image rejection 2x24 kHz 90 dB
Dynamic Range, no preamp, 20 meters (down conversion)
Dynamic Range 20 kHz 104#dB IP3 +28 dBm
Dynamic Range 5 kHz 97# dB IP3 +18 dBm
Dynamic Range 2 kHz 88* dB IP3 +4 dBm
Dynamic Range 1 kHz 85* dB IP3 0 dBm
# Combination of phase noise and 3rd order product
* Phase noise limited
Dynamic Range, alternate conversion scheme, 17 meters (up conversion)
Dynamic Range 20 kHz 102 dB IP3 +21 dBm
Dynamic Range 2 kHz 76* dB IP3 -18 dBm
* Phase noise limited
Blocking above noise floor, 1uV signal @ 99 kHz, AGC On, 3 Hz filter 144^ dB
Blocking above noise floor, 1uV signal @ 99 kHz, AGC On, 3 Hz filter 133^^ dB
^ 20 meters (down conversion)
^^ 17 meters (up conversion)
Phase noise (normalized) at 2.5 kHz spacing: 118 dBc
Phase noise (normalized) at 5 kHz spacing: 130 dBc
Phase noise (normalized) at 10 kHz spacing: 140 dBc
Phase noise (normalized) at 20 kHz spacing: 144 dBc
Phase noise (normalized) at 40 kHz spacing: 146 dBc
Phase noise (normalized) at 80 kHz spacing: 147 dBc
Phase noise (normalized) at 100 kHz spacing: 147 dBc
Phase noise (normalized) at 200 kHz spacing: 147 dBc
Phase noise (normalized) at 300 kHz spacing: 148 dBc
Phase noise (normalized) at 400 kHz spacing: 148 dBc
Phase noise (normalized) at 500 kHz spacing: 148 dBc
Noise floor, SSB bandwidth 14.2 MHz, no preamp -125 dBm
Noise floor, SSB bandwidth 14.2 MHz, Preamp 1 On -133 dBm
Sensitivity at 14.2 MHz, no preamp 0.43 uV
Sensitivity at 14.2 MHz, Preamp 1 On 0.15 uV
Noise floor, 500 Hz, 14.2 MHz, no preamp -128 dBm
Noise floor, 500 Hz, 14.2 MHz, Preamp 1 On -137 dBm
Noise floor, SSB bandwidth 18.1 MHz, no preamp -127 dBm
Noise floor, SSB bandwidth 18.1 MHz, Preamp 1 On -134 dBm
Sensitivity at 18.1 MHz, no preamp 0.28 uV
Sensitivity at 18.1 MHz, Preamp 1 On 0.13 uV
Noise floor, 500 Hz, 18.1 MHz, no preamp -132 dBm
Noise floor, 500 Hz, 18.1 MHz, Preamp 1 On -139 dBm
Noise floor, SSB, 50.125 MHz, no preamp -126 dBm
Noise floor, SSB, 50.125 MHz, Preamp 1 -137 dBm
Sensitivity at 50.125 MHz, no preamp 0.35 uV
Sensitivity at 50.125 MHz, Preamp 1 On 0.10 uV
Noise floor, 500 Hz, 50.125 MHz, no preamp -130 dBm
Noise floor, 500 Hz, 50.125 MHz, Preamp 1 On -142 dBm
Signal for S9, no preamp 53 uV
Signal for S9, Preamp 1 15 uV
Gain of preamp 11 dB
AGC threshold at 3 dB, no preamp 20 meters (down conversion) 1.8 uV
AGC threshold at 3 dB, Preamp 1 On 20 meters (down conversion) 0.5 uV
AGC threshold at 3 dB, no preamp, 17 meters (up conversion) 1.4 uV
AGC threshold at 3 dB, Preamp 1 On, 17 meters (up conversion) 0.42 uV
Notes:
The TS-590S was used in the December 2010 ARRL 10 meter CW and SSB contest.
Signals were not not really strong until Sunday afternoon for a sporadic E opening when some signals exceeded S9 + 30 dB.
While the signal density between 28,350 and 28, 510 kHz was not as bad as CQ WW SSB, there were lots of signals and many that were splattering.
There was no indication that the receiver was ever in overload, even with the preamp ON.
Unfortunately I did not use it on CW during the E opening.
The transceiver will be used during the W1BB 160 meter CW contest in December.
ALC:
There is a significant ALC overshoot problem, that affects both CW and SSB when driving a linear.
The overshoot approaches as much as 20%.
This can either clip the amp when starting to talk after a slight pause, or saturate on the first "dit" on CW, possibly causing a key click on the air.
Transmit IMD:
The SSB signal was observed by W6XX with a K3 and LP-PAN during a 3 minute transmission, with the LP-PAN on Max Peak Hold.
Intermodulation "shoulders" were clearly visible on 20 meters, down approximately 25 dB. The S/N ratio at that time was 50 dB. Two tone tests will be run in lab at a later time.
Ergonomics:
Ergonomics are generally good, with a nice feel to the main tuning knob.
Many functions, however, need three actions to adjust: push a button, turn the multi-function knob, and then push the same button again to cancel the function.
The LCD S meter is easy to read and has enough granularity to reasonable approximate an analog meter.
EQ:
The EQ granularity is not adequate. One can treble boost 1 or 2 as an option or bass boost 1 or 2, but not both.
This is significantly less flexible than the K3 with its parametric 8-band equalize, which can boost or cut any of the eight bands.
The 590S worked fine with N1MM logger and the serial port when N1MM was configured as a TS-2000.
The serial port sex is backwards, just like the Yaesu products, requiring a "gender bender". No attempt to use the USB port was made, due to lack of time and likely lack of support as of December 2010 by N1MM.
The receive audio was quite pleasing via an external Icom SP-20 speaker, or Radio Shack headphones.
The size of the Kenwood is similar to an Elecraft K3 or a Ten-Tec Eagle.
The Eagle and the K3 significantly exceed the close-in dyanmic range on the bands where the 590S is in "up conversion" mode. If the K3 isn't filled with options, all three radios are in a similar price range.
The Kenwood is significantly heavier than the other two, and unlikely to move around while one is pushing buttons.
Rev 1b
====================
Lp nermin S58DX
