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.
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,
I invite you to send your log will be appreciated, also with only one
qso, end-time Monday June 18th.All format areaccepted, better if xls.
Best 73'sde EnricoI5WBE
A.R.I. - EME Manager Coordinator
I am almost done with firmware for MABMPU simple controller. This is a potential replacement for DRO levels that can be expanded in the future to work with various popular EME trackers like RazTrak, DrzTrack, OE5JFL, F1EHN.
In order to use this setup, one MABMPU encoder board takes on role of the controller and reads the US Digital SEI bus encoders and displays the results on the LCD. This simple controller works with US Digital A2 and A2T encoders or MABMPU encoder board (using MAB25, MAB28, ETS25 or MPU9150 inclinometer).
Power (+12VDC) is provided to the encoders over the 6-wire CAT-3 cable from the MABMPU simple controller. In theory, the US Digital SEI bus can drive cables over 100m.
For those that already have a EME tracker which utilizes US Digital encoders, I have a version of the MABMPU LCD firmware that monitors the SEI encoder bus for encoder read position commands and simply displays the positions on the LCD display. In this configuration, the power to the MABMPU monitor is obtained from the SEI 6-wire bus.
OK, but what if the reflector of the yagis was level with the face of the dish, ie in front of the dish ?
Just trying to see if this is possible Udo ;)
> On 30 Nov 2018, at 8:23 pm, Udo Langenohl <udo(a)dk5ya.de> wrote:
> that won't work since the dish will ruin the pattern of the 4 bay group completely. Any kind of metal inside the fresnell zone of the yagis has a huge influence. Unfortunately...
> 73 Udo DK5YA
> Am 30.11.2018 12:58 schrieb Keith via Moon-net <moon-net(a)mailman.pe1itr.com>:
> I have somewhat of a logistics nightmare at my QTH.
> I’ve moved my 2.3 mtr dish with septum feed for 23 cms onto a small crank up tower to give me access to feed changes and better moonrise positions.
> This will normally be left retracted when not in use.
> I have to raise it to approx 6 mtrs above ground to clear neighbouring houses for moonrise and my own house for moonset, it CAN go to 9 mtrs but might blow around in the wind a bit :(.
> I have four 7 ele LFA yagis that I’d like to use for 2mtrs eme as well.
> Now has this been done before and how can the results be modelled and checked.
> Space is at a premium at home so what I’m thinking of is this.
> Using the existing Alfa Spid RAS az/el rotator for the dish, mount the four yagis on a stacking frame spaced around the dish.
> Obviously the dish will still be fully illuminated but what effect would it have on the four yagis spaced around it.
> I had planned to mount the yagis on a H frame with 2900 mm horizontal spacing and 2700mm vertical spacing but this can be altered to suit.
> The yagis would be some distance from the rim of the dish and be centrally mounted, or possibly slightly forwardly mounted if necessary.
> Can this be done ?
> I do not have the brains or the skills to do the calculations, but if it would work this would end up getting me on all bands from 144 mhz to 10ghz for EME in VK6
> I will be able to change the feeds on the dish from a small stepladder, and I can use a 1.3 mtr solid dish for 2.3 and 3.4 ghz from another location on my roof.
> Maybe even with 4 similarly stacked 70 cms 21 ele crossed yagis on this other tower, well roof mount.
> Am I dreaming or is this possible ?
> My primary objective is 23 cms and 6cms EME from home and 3 cms EME portable, all the others bands are a bonus and not essentials, but it would be nice to have :)
> If those in the know can do some calcs to help see if this is possible then I hope to reward you with my eternal gratitude and a contact on EME someday soon.
> If not then it will just have to be 23 cms at home and 3 cms portable :(
> I dont have the knowledge to draw a diagram of what I’m suggesting on my Mac but I have a good hand drawn sketch I can scan and email to anyone who wants it.
> This reflector is a fabulous source of information so thanks in advance :)
> Cheers & 73
> keith(a)vk6eme.com <mailto:firstname.lastname@example.org>
> VK6KB / VK6EME
> 0488 228 088
VK6KB / VK6EME
0488 228 088
some measurements at 8.4ghz from mro with 7.2m dish at dl0shf
vy73 per dk7lj
-------- Weitergeleitete Nachricht --------
Betreff: A round of MRO around Mars Update
Datum: Wed, 7 Nov 2018 10:59:23 +0000
Von: Klaus Fenger <Klaus(a)fengers.de>
some interesting pictures from watching MRO last night.
The order is unfortunately from bottom to top.
MRO 06112018.png Signal passes through the Martian atmosphere and then
disappears behind Mars.
MRO 06112018.png MRO comes out again and again the signal runs through
MRO 06112018_7_unten.png lower culmination
MRO 06112018_12_oben.png upper culmination
MRO 06112018_16.png qsy to a new frequency ~ 5khz; MRO makes
observations for the antenna no longer accurate to the earth and to see
the signal of a slight Doppler.
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