Posts by EA4LE

Hi Geri,

Thanks so much for posting this! a great solution for those of us working with a SDR in tx.

I tested it on two computers, the first with a native serial RS232 hardware com port and it works fine. However in a newer PC with no RS232 port and using a USB to COM converter the time latency is high and cannot key faster than 5 wpm with a straight key.

In any case a great solution!

I made a Spanish translation of the new QO-100 Band Plan release by AMSAT-DL. Hope this will be useful for Spanish speaking audiences new to QO-100 checking this forum.

Traducción al español del nuevo Plan de Banda del QO-100 anunciado por AMSAT-DL

Hi Adrian,

thanks so much for taking the time and the effort to enlighten me. Microwaves are uncharted waters to me, esp when it comes to amplifiers like this.

I see now the rationale and this makes sense. Thanks also for pointing to the others doing similar mods, very useful! Back to the soldering iron and the tests now!

Yours most grateful,

Toni, EA4LE

Quote from G8UGD

The end effect is that both devices now have the same bias voltage.

You may just notice where I cut the track under the end of the white wire!

Is it the best way of doing it, probably not, it is probably better individually biasing each device for a set standing current that way you know each device is taking the same current. Out put powers have been in excess of 80 watts.

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Hi Adrian, what is the rationale for the mod that results in having the same bias power in the two devices? does this mod make a great difference in performance? I am really impressed with the output power you get from your units! what is the input power you are using to get 80W out?

To date I have been using a homebrew QFH with good results, extra on overhead passes, see attached pics

So far, my experience with homebrew turnstyles is not that good, perhaps due to poor construction technique on my side. I recently got a Wimo turnstyle as I moved the QFH to another location (vacation QTH). I am looking forward to seeing how it performs in the same location where the QFH what as soon as the weather improves. Unfortunately I can not take it as far from the house as Robert's

Quote from DM5TU - sTef

How nice from you to make the video. I am just in the process of mounting the modules down on the cooling part and wire it up.

Looking forward to improve my uplink signals.

Vy 73 es tnx

Thanks so much Stef, glad you liked it

I have made a video that shows my PA driven with 800 mW and producing 19W output. The power supply is 28 V DC and current abt 2.5 A

The mods are bypassing the input isolator and the output circulator.

I also have driven the PA with 2 W from a SG-Labs transverter and the output is 22 W with 3.6 A current @ 28V DC.

Best 73

I can receive the beacon with the V8 Finder using different antennas, from 80 cm to 1,9 m, and different LNB 's: unmodified and GPSDO modified.

A blind scan discovers the A71A transmission.

It is also possible to receive the SR1000 transmissions, unfortunately no lower symbol rate.

Here is a video I posted on Youtube a couple of weeks ago.

I am currently using the v8 Finder to point antennas to Es'hail2 with the A71A signal. For fine tuning of the antenna pointing and LNB rotation for DATV reception I use the Minitiouner with its comprehensive set of monitoring data.

Best 73 de Antonio, EA4LE

p.s. in my experience for DATV and RB-TV the best performing LNBs are those "free riding" (i.e. not disciplined) and those who produce a clear musical tone on the CW NB beacon (probably those with no jitter or phase noise)

Waiting for mine also, no shipment note yet

Thanks Peter!

Yesterday I was delighted to have the chance of making my maiden QSO on QO-100!

I guess we will see a significative increase in the number of EA stations.

A temporary approval for the use of the 2400,050-2409,500 MHz segment of the 13cm band for Es’Hail 2 (QO-100) up-linking has been granted by the Spanish Authorities to radio amateurs with a valid license. With this approval no special permits (complex and time consuming) will be required.

This is great news and a great advancement for those of us in wait!

Thanks to AMSAT-EA and URE (the Spanish Radioamateurs Union) for the negotiations that have resulted in this temporary approval!

Cheers,

Antonio, EA4LE