It is high Winter Time at our Alphut
Category: Miscellaneous
Submitted: 2009-02-22 22:42:32
Hans, Head of HB9CW, spent a weekend at our alphut. He could only get back on Thursday. Many avalanches crossed the road and there was no way other than staying up there. Now he is back with many pictures.
 . . 
Cavity for TH347 on 1296 MHz
Category: EME Equipment
Submitted: 2008-04-01 20:21:21
The dream of solid power in EME is either solid state but expensive or heavy, using tubes but affordable due to surplus equipment.
Rohde+Schwarz manufactured TV repeaters which can be modified to make useful power on 1296 MHz.
Read more how ON7UN did it here
Let
Category: EME Equipment
Submitted: 2008-01-13 21:25:23
The following link tells you how to build your own vacuum tubes. Most of us use vacuum tubes for higher power. The following movie shows how a French Tube enthusiast, F2FO, builds his own vacuum tubes. HB9THJ, Beat initiated this interesting link to me.
Build your own tube
Tube testing rottens fingerstock - cathode fins
Category: EME Equipment
Submitted: 2007-12-21 20:21:44
Testing pulls Thomson TH347 an TH327 delivers typically 1 out of 10 with gain >9dB. A few out of 10 deliver 8-9dB and 5 or 6 are not usable on 1296MHz. The tube specification is max 1000MHz so these results are not really surprising.
Many in- and outs of a tube in a cavity may rotten the fingerstock. I am using separate amplifiers for tube testing and EME operating. I would not use the eme equipment for this purpose.
 
23cm Preamplifier HB9BBD with N-connectors
Category: EME Equipment
Submitted: 2007-11-18 16:15:18
On request of a new 23cm EME enthusiast in Greece the HB9BBD LNA for 23cm has been delivered with N-connectors from SUHNER.
 
The SMA version..
If you are interested in learning more about the
HB9BBD LNA for sale
click here
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