The Fifty Megahertz Band

W4GDS, known to many for his daring exploits as ZF1RS during several previous VHP contests, i* planning to go even further afield this year. Boh has already been issued the call VP5RS and if everything gels as expected he will be active from Cacios Island for several days around contest time. Cacios, in cast1 you don't know, is one of a group of islands located approximately 500 miles southeast of Miami and 175 miles north of Port-An-Prince, fentathe plans call for a beacon which would be operative even if the band isn't open. Details will be published as they income available. By the way, Boh, do you really think you can get United to stop there?

While on the subject of DXpeditions it might be well to mention that the people who undertake these trips for our pleasure do so at their own expense and often require land always appreciate) an SASH. The same is true of Stateside operators who live in sparsely populated States, [lie burden of postage on hundreds of cards each year is too much to hear. You can make life easier for these people and insure receiving a QSh by doing lliis small courtesy.

The annual VHF Conference of the Central States VHF Society is scheduled for the weekend of August IS 19 20. Now is the time to start making plans to attend. The society net meets at 2130 CST on or ahout 3C>80 kHz on Sunday evenings, i rive listen you will hear a great deal of interest to the VHF- UHF devotee.

The near complete silence lias been broken! The evening of March 5th brought a rather extensive opening from 7 Land as far east as the third call area. Glen WA7FPO, could be heard working Missouri, Kansas. Oklahoma and Tennessee, among others. The 5 s in Texas and Oklahoma also got their share working into Florida and most ol the Midwest, A report was received to the effect that the border states had earlier in the day heard signals from Central and South America; however the report has not been confirmed as of Hi is writing.

In building several dozen K\Y PEP linears ol the type described in the July 1969 issue of 73. a number of changes were made which may be of interest to those planning a similar project. The chassis size was changed to 8 x 10 x 21 z in. m order to allow

I he same amplifier to fit either the Swan or Heath speaker cabinet. Components originally mounted on the side of the chassis were moved underneath maintaining the same relative position. Each screen is now fed through a separate No. 327 lamp and bypassed by a I3K. 10W resistor. Hie resistor biases the lamp on so that !ess screen current is required to blow, the bulb. It may be necessary to adjust values in the screen supply to compensate for the additional current With this modification it is no longer necessary to change one tube at u time in order to determine which of the parallel pair is defective. The amplifier will run quieter if you tack the chimneys to the sockets with 3 or -t dots ol silicon rubber bathtub caulk It stops the inevitable chattering.

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