I had high hopes working on the project over the xmas time, but it turned out to be a very busy time, followed by a hectic work schedule, traveling etc… So after not being able to take part in the CQWW 160m contest due to lack of equipment I started the work again. I just [...]
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So, I have now designed the filter board and calculated the values of each of the 6 filters. I have some 1000V silver dipped mica capacitors that I’m going to use, and have been adjusting the toroids to match them 100%. I decided to use 5 element low pass filters in stead of the 7 [...] I had some issues drilling the spreader, I thought the drill would go through the copper like butter, that is partially true, but as this is a very thick piece I’m drilling, it grabbed the drill and twisted it. I had two 2.5mm drills twist to bits and I could not get them out of [...] Here are some excellent pdf’s from the father of the EB104 QST_Dec_1982_p13-16 QST_Jan_1983_p30-33 Motorola-600 Watts RF Power FETs EB104 And here are some of the best links I have found: crazy italians (must stop this music!): http://i5uxj-2.cln.it/amp/amphf150/amp150.html This is a good page, if not the best.. : http://www.g4apvweb.pwp.blueyonder.co.uk One more: http://oh8jep.kotinet.com/eb104.html This is perhaps not to par, don’t understand how this was posted [...] So, day7 in the H1N1 swine flue s***… just starting to gain consciousness Got my way to expensive Mouser order today – happy that the FedEx charge was 0.00 usd… so they just smeared that on the rest of the components. Only reason I used Mouser was the selection of 1000v silver-dipped-mica capacitors, they seem to [...] This is based on the Motorola EB104 bulletin: EB104 amplifier board ordered from Communications Concepts, including 4x MRF150 I have been planning to build a 600w linear amplifier to use on the HF bands. Why homebuilt?? I have been asking my that question many times. If I have to order a commercial built amplifier I have to give out at least $1500-2000 USD. That will put a dent in the home budget and my XYL will notice [...] |
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