Amateur TeleVision

ATV in the 70’s was usual on the 70 cm band. I modified the tuner of a portable TV so that it I could reach channel 17, that was the channel where I could receive a lot of ATV stations from Amsterdam and surroundings. However, it was necessary to put a preamplifier between antenna and the tuner. In that time I made much duplex QSO’s with ATV stations, such as Hans, PA0ORI from Amsterdam. Also sometimes  spontaneous DX appeared…..

70cm ATV from Amsterdam

70cm ATV from Amsterdam

DX 70cm ATV with very good conditions

DX 70cm ATV with very good conditions

For quite some time I walked around with plans for ATV . More specifically: I want to receive ATV on 23, 13 and 3 cm as well. Transmitting ATV clearly has less priority, but is very useful for testing my converters (hi). For that reason I bought a Comtech 13 cm ATV transmitter + 1 Watt amplifier. On the Internet, the site of IK8UIF,  I found a nice 13cm converter complete with description and print layouts. A friend of mine has made the pcb for me and I built the converter with parts from and old LNB.  I checked it by means of the 13 cm ATV transmitter and a commercial satellite TV receiver. The intention is also to receive 3cm ATV. I have got a modified LNB for 10 GHz (thanks Jos, PA3ACJ!) and that should be enough to receive the ATV repeater in Ijsselstein (PI6ATV). As soon as there is any progress, you can read it on this page! First some pictures of my 13 and 23 cm stuff!

23 cm pre-amplifiers

23 cm pre-amplifiers

13 cm  down converter (IK8UIF) with local oscillator

13 cm down converter (IK8UIF) with local oscillator

13 cm ATV transmitter

Comtech 13 cm ATV transmitter

13 cm, 1 Watt amplifier

13 cm, 1 Watt amplifier

For testing the 13cm transmitter a build (already a long time ago) a ATV test picture generator. With the 13cm Comtech Tx, the picture generator and the 13cm->23cm ATV converter I received a very nice picture.

Test pattern generator

Test pattern generator

 

13cm ATV with below the Comtech controller

13cm ATV with below the Comtech controller

 

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To make these pages more readable I have decided to split this page in a separate page for 70, 23, 13, 6 and 3cm ATV

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10 GHz experiments
After many years, I finally decided to place the 10 GHz LNB on a 30cm parabolic reflector and put it out of my roof window. In Electron I read an article about using caravan clamps for mounting an antenna mast. I bought 2 of those things on a flew market for €12,- and mount them on an small closet which stays under the roof window. That was a perfect way to mount the mast (not agreed by my xyl..).

Caravan antenna clamps

Caravan antenna clamps

After the antenna was setup, I rotate it to get some signal on my satellite receiver. And YES! If received the signal of the Zoetermeer ATV repeater, but only B4. Because it’s not so easy to use an offset antenna for receiving ATV, it’s better to mount the parabolic reflector horizontal! Don’t forget to change the polarity in your Rx to Vertical…. Because this set-up was working well, I decided to replace my Satellite TV disk by the 10 GHz ATV horizontal mounted disk and pointed it to the PI6ATV repeater. The digital reception was B5 but the analog reception was about B4.

Horizontal mounted disk

Horizontal mounted disk

 

For receiving PI6ZTM on 23cm I build a double quad antenna. I also build a very smal QFH antenna for 13cm ISS HAM-TV. See pictures below:

23cm double quad antenna

23cm double quad antenna

 

13cm QFH antenna

13cm QFH antenna