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pentalab wrote:

:-) Alles klar Peter. What diameter loading coil would you suggest for a multiband centerloaded vertical with 3500 kilocycles as the lowest frequency. Cheers, Dick PA3DUV

The 4 feet aerea around my 80m vertical looks the same. To prevent grass growing near the feedpoint, I drain the ground regularly with vineger. 73 Peter ________________________________ From:

Beside, when using real loading coils and not such 5" mickey mouse coils, 500W are all one needs to work any station heard on 80m and break most dx pileups easily. 73 Peter

I worked for motorola for a couple years. We had a guy who thought nothing of climbing a tower with multiple 400 MHz rigs going. I pointed out to him that he was in danger but blew me off. He always

The Touota Prius has a 200v, 250A-max Ni-MH battery. The battery recharges from the electric motor-generator that is powered by the 1500cc gas engine or from braking the already-moving vehicle.

I used to work for a tower company back many years ago. My buddy (who owned the company and a ham) finally sold out and semi-retired maybe 10 years ago now. He told me, he had to do some work on

If any of you are seriously interested in QROO/mobile and need info on battery plants, regulators, alternators and 3-phase inverters, etc., please contact me off-list. Let me send you the pic of

On the Bechtel/AWS project just before, during and after the WTC disaster we serviced cell site antennae throughout Manhattan as well as all the other boroughs. When going out on the roof of

I have a couple alternator companies quoting a 48 volt alternator (54V) at 100 amps for my pickup. I figure a couple 24 v truck batteries in series in a bed mounted battery box with a custom remote

Your best bet would be to get a dual output alternator, my friend. No matter what the car, the car stereo manufacturers make a dual output high current alternator. 100 amps is easy to get... 150

In the past and maybe still, 27 MHz was used in diathermy machines. Effect???? David KC2JD

It's all about duty cycle. Most of the motor mauls I saw or had the pleasure of fixing where about the same size as an amp of comparable power output.... ie... One that had 16 active pass devices in

I really need to figure out how to get this thing to quote, when I get things in the digest. Makes it easier for everyone else to figure out what I'm trying to say.... <TollFree1800@...>

There is very little tissue heating at HF. As you start passing through Vhf to UHF you have severe issues. Some very serious tissue effects can happen at 432. My 432 amp can generate 2KW out. With

Will, Thanks for the input. After reading all the post on this subject I will finish the power supply as follows: 8 x 2 volt 230 Ah cells feeding the amplifier stack 16 volt 3 stage charger, input

Per information posted to the South East DX Club reflector yesterday, Jim, K4JRS (k4jrs@...) is liquidating the inventory of Tom's Tubes. Information from another source says that Tom's home

** In the early 1960s I used to work at Raytheon, Point Mugu. Bill Hunter, W6YK, worked in the engineering division. On cold mornings, he would warm his hands on the 300w X-band doppler radar.

wrote: amplifiers you down Right now, they're running those yellow top batteries with the spiral cells. They claim these to be the best. Also, there's really no limit to the batteries that you

The largest one I made and sold was a 200 amp. I designed a 300 and 400 amp but never built one as I never had an order for one over 200 amps. Anyhow, the ones I built used 10 pass transistors