I have been playing with a new Triquint ULNA device (TQP3M9036). It
Shows a lot of promise. It is like a MAR or MSA device in that it is
50ohm in and out. and has a claimed NF about .4db nf ( their numbers).
I have built several pramps to test them and have gotten even better
than they claim and they cover 50-1296 with ease and NF is .4ish or
below. The S11 and S22 are both great and the OIP3 is +35db also
...very nice device. It has great promise as a good terrestrial LNA.
Preamps are foolproof to build and would cost under $50 if all the best
quality parts are used.
Just for information only ...
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I’m ready on 6cm with the same dish I’m using on 3cm.
Despite the strong local 5 GHz WiFi noise, had a nice 579/569 first QSO with this setup today with HB9Q, thank you Dan !
Setup is a 3.7m dish and 60W at CP feeder.
I can be QRV on 6cm or 3cm most of the days, skeds and tests are very welcome, as usual.
qrv 70cm, 33cm, 23cm, 13cm, 9cm, 6cm and 3cm.
I stumbled on this site and discovered interresting things.
2m Dual-RX (Special RX converter for 2m adaptive (EME) receiving)
ME2-XP 2m dual RX (EME) transverter (The first dual RX color display
transverter on the World!)
Does anyone have feedback from one of these 2 devices?
It sounds interesting but I'm looking for someone who has this kind of
device to exchange feedback, especially with the use of MAP65 (setup -
73 - Damien F5RRS
For 10Ghz only one preamp is available and we will close further production after delivering more then 100 pcs.
We expect a crowed band in the coming time,hi.
We are currently preparingthe first batch of a super LNA for 24Ghz with NF: 1.1dB
Furthemore we would like feedback for the design and production of an 24Ghz SSPA.
Design goal is: 10Watt rf out, Vdc: 15Vd and WG connections.We will design against a reasonable price but need your feedback.
Thanks in advance,
this is a reminder for the ARI EME Trophy 2019 Spring Section
Period:from 00.00 UTC of 11th May to 24.00 UTC of 12th May 2019
Bands: 144 - 432 MHz. 1.2 - 2.3 - 5.7 - 10 GHz.
You can find rules at this link:
It's appreciated the use of the log that can be downloaded from the site
All Stations that have participated in both sections will participate to
the final Trophy 2019 with the sum of the score obtained, the First
station in each category wil receive a Prize an Award to all participants.
Vy 73' de Enrico i5wbe
I seek to add a camera to the center of my EME array to know when it¹s
on/off the moon.
1. wired camera (not wireless nor Bluetooth),
2. CCTV type is OK if available
3. All weather capable 20 deg F through 110 deg. F
4. Reliable all the time
5. Monochromatic or color (either one) is OK
I recall there was some detail about viewing the moon that a certain focal
length (lens) is best and I¹d welcome (please) camera recommendations
What specific camera manufacturer and model do you recommend?
What specific monitor (manufacturer and model) recommended?
What cable type is required? (impedance, number of conductors and gauge
for 150 foot or 48 meter length)
Thank you; very 73,
I'm not exactly sure but my understanding is the signal/noise ratio
is what is displayed and referenced to Bandwidth = 2500 Hz (eg s/n=1 is 0 dB).
JT65 tone bandwidth is something like 4.7 Hz so 10Log (4.7/2500) =
-27 dB That's pretty close to the minimum signal level detected by
JT65 (I've gotten -29 on a rare decode; typically -28 and higher
decodes; -26 decodes near 100% of the time). All referenced to 2m-eme.
WSJT-10 JT65 seems a little better on sensitivity than MAP65
(subjective analysis). I've not run WSJT-X enough to form an opinion.
73, Ed - KL7UW
At 01:31 PM 7/30/2019, Bob Atkins via Moon-net wrote:
>Without knowing the algorithms involved it's hard to understand
>what's going on.
>I believe that for the EME modes like JT65 (and JT4?) decodes are
>clamped at -1 as a maximum. In other, HF, modes (e.g.JT9) go higher.
>Technically the reported signal strength is the S/N ratio in a
>2500Hz bandwidth, but that fact that WSJT10 and WSJT-X report
>different numbers (with WSJT-X sometimes indicating a signal that's
>5 or 6 dB stronger) shows that at least one of them isn't doing the
>calculation very accurately. It's not a constant difference either
>and it looks like the stronger the signal the more the reported
>signal strengths differ. As I said before, WSJT10 and MAP65 seem to
>report about the same signal strength on JT65 signals, so they
>probably use the same algorithm.
>At best it's a relative indication of signal strength as long as you
>know what software the DX station is using. If you don't, signal
>strength reports are pretty meaningless.
>S meters (theoretically) read absolute signal strength not signal to
>noise, in 6dB steps. I think S9 on VHF is supposed to be -93dBm.
>It's not really possible to convert a WSJT decode signal strength
>with an S meter reading. Also S meters are rarely well calibrated
>and certainly don't take into account the gain of the preamp and/or
>I suspect that only Joe and some of the WSJT development team
>members know what's actually going on in the calculations and why
>the numbers differ between WSJT10 and WSJT-X.
>From: DW Harms (Dick) <qtc(a)kpnmail.nl>
>Sent: Tuesday, July 30, 2019 1:40 PM
>To: Bob Atkins <ka1gt(a)hotmail.com>
>Cc: moon-net(a)mailman.pe1itr.com <moon-net(a)mailman.pe1itr.com>; Luc
>Subject: Re: [Moon-Net] WSJT-X
>Well I have also seen plus-reports (up to even +10) so I do wonder
>about the exact math behind WSJT-X's signallevel calculations.
>According to what I learned, +10 dB would equal approximately S-1.5
>on VHF but the signals that produced that amount of plus-signals
>that I have seen, were way stronger.
>73, Dick SM/PA2DW (JO58PK)
>Op 30 jul. 2019 om 19:17 heeft Bob Atkins via Moon-net
>het volgende geschreven:
>>It's 100% normal. Typically WSJT-X reports much stronger signals
>>when the signal strength is high (-1 is as high as it does). When
>>signals get weaker (e.g. -23) the WSJT10 and WSJT-X reports are
>>much closer. MAP65 reports about the same signal strength as WSJT10.
>>I've no idea why there is this difference or which one is "correct"!
>>on behalf of Luc Kempeneers via Moon-net
>>Sent: Tuesday, July 30, 2019 11:56 AM
>>Subject: [Moon-Net] WSJT-X
>>I switch from WSJT 10 to WSJT-X. I have the feeling that WSJT-X is
>>very generous whit the signal report. Signal reports of -1 are
>>frequent while i think this is nearly impossible. Am i doing
>>something wrong with the settings or is this normal?
>>My station on 23 Cm : 4 meter dish and and 0,3 Db preamp.
>>Moon-Net posting and subscription instructions are at
>Moon-Net posting and subscription instructions are at
73, Ed - KL7UW
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