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N4PZ USA flag USA

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BEACONS 432.320 70 watts to a pair of big wheels at 70 feet.

I run the Midwest Monday night net on 432.110 beginning at 8PM Central / 9PM Eastern time. Please join us.

My station on 432 is 4 x 32 foot HB DL6WU yagis at 70 feet and 1500 watts from a water cooled HB GS35b Russian triode.

Station on 1296 tropo is a 7 foot dish at 70 feet and 1500 watts at the feed. Looking for skeds gents. CW SSB. No doodle mode.

 

First licensed in 1955 as WN9OJI soon to become W9OJI and on to the extra class in 1959 because I was a cocky kid and wanted to impress all my friends. After failing the CW test the first time I HAD to get the extra then. Hi

Interest began in VHF and above in 1957 when I received a Gonset Communicator, 2 meters, for high school graduation and it was never the same again

I build just about all my own gear from antennas , high power amplifiers and anything else I need.

I have been and am an avid builder and experimentor. Current activity is 432 tropo, 1296 EME and tropo with a 4.9 meter dish and a VE4MA feed on EME and a 7 foot dish at 70 feet on tropo with about 1 kw.

The final amplifier on 1296 is a TH-327 tetrode which easily delivers 1500 watts to the VE4MA feed. I have WAC and over 300 initial contacts on CW EME 1296.

I now have 2304 EME and 150 watts at the feed of my 16 foot dish.

I am very pleased with the performance, stability and power gain of my H2O cooled GS35b on 432. 1500 watts output is easily obtained with 120 watts of drive. H2O cooling eliminates any thermal.

So far I have built about 22 144 Mhz amps and 57 432 amps. I no longer sell them as tubes seem to be a mystery for the newbies.

Both will easily deliver 2 KW into a dummy load.

I am beginning to build a H2O cooled GS23b 432 amplifier. The GS23b requires 60-70 watts drive for legal limit vs the GS35b requiring 140 watts+.

I just finished a very simple GI7b H2O cooled 432 amp. I makes 400 watts with 40 watts drive. Heck of a good amp or driver for a big amp. GI7b tubes go for $15. Russian.

The Russian tubes are cheap and vertually indestructible.

Thanks for your interest. See you on the bands

.The picture at the top is a GS35b legal limit 144 Mhz amplifier.

Steve N4PZ n4pz@live.com

 

 

432 Mhz GS23b                                                                                                        Early version of a 144 Mhz GS35b amp.

432 Mhz cavity GS23b

 

7676077 Last modified: 2016-11-04 18:17:00, 3728 bytes

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