Search found 10 matches

by f6dro
Thu Sep 27, 2018 5:26 pm
Forum: Amplifiers & Tuners
Topic: ANAN-10 PA IMD performance
Replies: 11
Views: 3836

Re: ANAN-10 PA IMD performance

Hi all agn , could sort my tx problem : it was a small connector routing the tx signal from the Hermes to the amplifier which was disconnected. Now more serious. My ANAN is worse that PA5Y , IMD is -21 relative to one tone on the 3rd order and -33 on the 5th order (at 9W pep). I find it is another b...
by f6dro
Mon Sep 24, 2018 2:34 pm
Forum: Amplifiers & Tuners
Topic: ANAN-10 PA IMD performance
Replies: 11
Views: 3836

Re: ANAN-10 PA IMD performance

Hi guys , not sorted of the pa problem. After firmware and software upgrade , I get the rigth power out of the Hermes , but no power at all out of the 10w amp. I can hear a relay click when I press TUNE but no power out. I reviewed all the software configuration and all looks ok. I will carry on wor...
by f6dro
Sun Sep 23, 2018 4:55 pm
Forum: Amplifiers & Tuners
Topic: ANAN-10 PA IMD performance
Replies: 11
Views: 3836

Re: ANAN-10 PA IMD performance

Hi all agn , I've measured today the IMD on 28Mhz on the low power output with PA disabled. I get the same numbers than PA5Y. I could not do the measurement with the power amplifier as I have a problem there : no more output since I have upgraded to a new firmware and a new HPSDR yesterday. Will do ...
by f6dro
Sun Sep 23, 2018 10:15 am
Forum: Amplifiers & Tuners
Topic: ANAN-10 PA IMD performance
Replies: 11
Views: 3836

Re: ANAN-10 PA IMD performance

Hi all , I don't know about Conrad , but in my case: I am a V/U/Shfer. The anan is used as a IF , with some power out because all my transverters are far away from the shack. There are several bands using antenna 1 and this antenna 1 port is switched on 13/6/3cm transverters. Antenna 2 goes on the 2...
by f6dro
Sat Sep 22, 2018 5:34 pm
Forum: Amplifiers & Tuners
Topic: ANAN-10 PA IMD performance
Replies: 11
Views: 3836

Re: ANAN-10 PA IMD performance

Hi all ,

sorry to say , but it is not because pure signal improves IMD that the PA can be that bad without pure signal. Maybe quiescent current is wrong?

73
Dom
by f6dro
Thu Sep 20, 2018 7:50 am
Forum: Hermes (10 & 100)
Topic: ANAN-10 TX spurs
Replies: 17
Views: 5826

Re: ANAN-10 TX spurs

Hi , me agn , I had a look at the 9744 datasheet. The sfdr explains the spurs we see. Probably my anan is a 10E , I don't know if it is the same ADC in this version , maybe the sfdr is 10dB worse? Anyway , if it is the case , there is no simple way to improve this. I also had a look at the filter , ...
by f6dro
Thu Sep 20, 2018 5:48 am
Forum: Hermes (10 & 100)
Topic: ANAN-10 TX spurs
Replies: 17
Views: 5826

Re: ANAN-10 TX spurs

Hi again , I got some time yesterday to run more measurements. You are rigth , spur content depends on sampling. With 384K spurs are -72 (10dB better) , still not enougth and worse than Conrad anan10. A strong signal on the band is something like -30dBm in the offended receiver , then we get 4 inban...
by f6dro
Wed Sep 12, 2018 8:20 pm
Forum: Hermes (10 & 100)
Topic: ANAN-10 TX spurs
Replies: 17
Views: 5826

Re: ANAN-10 TX spurs

Hello Walter , in fact I don't care abt 2Mhz spurs ( which are probably coming from the 5V switching power supply).I saw them but was not choked. My problem is in band spurs. Your spectrogram has been made on 2m , so imagine someone using such a poor tx during a major european contest with 60dBm or ...
by f6dro
Sun Sep 09, 2018 6:24 pm
Forum: Hermes (10 & 100)
Topic: ANAN-10 TX spurs
Replies: 17
Views: 5826

Re: ANAN-10 TX spurs

ooooops anan10 not anan 100 like mistyped
by f6dro
Sun Sep 09, 2018 6:23 pm
Forum: Hermes (10 & 100)
Topic: ANAN-10 TX spurs
Replies: 17
Views: 5826

Re: ANAN-10 TX spurs

Hi all , I saw this topic development on the forum. Should I conclude that all ANAN100are not the same? Mine is bad , generating 4 (at least) in band spurriis in the 28Mhz band and in all bands in fact. It is not a spectrum analyser problem as , to be sure , I used an RX to confirm . These products ...

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