Hello,
You have several possibilities:
1. switch PTT via the 3,5mm plug
2. set the jumper inside to switch to TX via +12V on the coax
3. HF-Vox - is active any time (to protect the transverter of TXing into the RX part 
)
But there is a manual that can be downloaded from Hrisijans web site where all the above mentioned points are explained.
73 de Johannes
I don't press PTT. In RX mode there is enough signal at the 24th harmonic.
Beware that some (older versions) go into an alternating 'on off mode', but that can be circumvened (for a while) by pressing the menu button.
...because of this I push the PTT
..and if you have not a BAOFENG the 24th harmonic (while pushing the PTT) works also with any other 70 cm TX 
73 de Johannes
yes, thanks, you already mentioned that before - 73 !
Thank you !!
Hello,
like Heiner (DD0KP) said the easiest way is to take the 24th harmonic of a 70cm signal (e.g. from an handheld). 437.075 gives you a 10GHz signal at the upper beacon.
Just hold the handheld close to the LNB and push PTT
(If you have a BAOFENG UV5R you will see also the "processor-spikes" few kHz lower than the beacon frequency)
73 de Johannes
Hello,
I just REF-locked my updated MKU UP 2424A (now "B" ). Seems that the 10 MHz signal has to have a certain level to lock. With my leo bodnar GPSDO in the lowest sigal level setting it locks about 80% of the time; with the second lowest level it locks 100%.
(I connected a small coax with the free "mini-coax" connector - on the board from were already two coax cables go into the other module and mounted a SMA-jack in the rear (same position as in 2424B) of the upconverter.)
73 de johannes
Hello,
I now have my poty ready with a very nice RL-curve and it works very well.
Now I wonder if anyone has experience with covering the POTY with a thin coat of (non conducting) paint to protect it against corrsion.
Is the influence of the covering paint significant ?
I ask, because I tuned my POTY with a piece of dielectric material (thanks to Pavel OK1PHU), thus I suggest that there is an influence even of a thin layer of any material.
73 de Johannes
The point of the SMA-connector in the new 2424b is 10,5 mm from the left in the same hight as the other connectors...just if you want to have the same optical appearance as the 2424B
73 de Johannes
rather feed the TV-dish with a patch feed than with a helix.
Today I tested the 5 turn Helix from WINKLER (which I adjusted for 2400 MHz, because from factory it was horrible) as a feed against the POTY-feed. The difference measured via QO-100 was 3dB in favorit for the patch. (I tested with a 1,2m offset dish)
73 de Johannes
Thank you for this nice IR-Image. Yes the transistors get hot, but no relevant temperature in the output-matching-section, that means, that there seems not to be a relevant loss of RF converted to heat. (I.e. seems to be not the source of the "Lost Watts")
73 de Johannes
On6zg Hello Jan, in my PA there are only a few parts for matching the output
(see image below), but no real filtering. Maybe the matching can be optimised
for 2400 MHz (but shouldn't be to bad in original because it's the lower end
of WLAN frequencies.
(A friend of mine even measured 35dBm in an unmodified PA of this type).
73 de Johannes
Hello Jan,
did you try drive level up to 350mW ?
If your PA is OK (both transistors work) 36dbm are possible.
73 de Johannes
Hello Wolfgang,
thank you for the numbers you show in your test.
Did you adjust the position of the POTY (distance to the dish). In your pictures the "entry" of the waveguide seem to be very close to the dish compared to "entry" of a normal LNB.
Your figures show that the Nylon lense is 2dB worse than even no lens at all. That's a point to think about.
73 de Johannes
My "measurements" are with 2,7 KHz - that's right.
73 de Johannes
Hallo Marco,
bei meiner 85 Offset-Schüssel sind es genau 18dB (Messung HDSDR und SDRPLAY mit average - nicht peak)
Servus Johannes
Hello,
if someone has problems, then drop me an email (CALL at darc.de) and i'll send a PM.
73 de Johannes
Hello Thomas,
really ?
You just have to share your experience with others (i.e. describe a modification, repair, etc) and you get free access.
The systems only works on a bilateral basis.
...you have PM.....the article is >1MB thus it can not be uploaded here
73 de Johannes
