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Exactly my findings. I was able to find the cans for the power tune up by tracing the circuit but I really do not want to mess with it until I can get a better lay out. I sure did want to talk on this thing this weekend:unsure:

I have a copy of the service manual, it is listed in the link above in this thread. I cannot see any listing of the said components.

:D:D:D:D:D I will give it another look, I could not see anything on the board. Even with reading glasses:D

Even with the tune up info the make reference to adjusting l208, l209 etc. etc but I see no markings or reference as which is which.

I figured most of it out. It needs an alignment. Does anyone know where a board layout is for this thing? The service manual is kind of vague as far as component location. Thanks in advance.

Figured it out, now to why it is dead keying 1 watt and modulating to around 5. Anyone ever put a variable power in one of these?

Does anyone know what would cause a CPI CP 2000 Base to transmit on AM while in LSB and receive in LSB mode? In am mode it will only deadkey with no audio but receives in am fine. Thanks for any help on this rare bird.

No, the class of operation would be determined by its planned use.

The harmonics are there in a "pill" amp no matter what. Overdrive causes saturation which produces IMD. The only way to get rid of harmonics is with filtering. The proper amount of drive is what the recommended specs are, although that is hard for us to comprehend:biggrin:

I know its just wire and the whole building it is fun in itself but I hate absolute failure:D

Well has anyone tried this style of antenna on anything higher than 20 meters? Any luck?

I have read it will work above 10 MHz but not as efficiently. I have heard of a lot of people using it with good success on 20 meters. I was just curious if anyone has knowledge of it or has tried it around 10 meters.

Has anyone here attempted to use a NVIS, (Near Vertical Incidence Skywave) antenna on 10 or 11 meters? If so what was it? A dipole close to the ground? How close? how well and often did it work? Really interested in trying this and I am going to but was just curious.

See, that is more like what I am wanting to do. The last large balun I made about 5 years ago was for a rhombic antenna we were experimenting with. Me and a friend strug the antenna from trees and parked my truck right under the feed point. I was running quite a bit of power which made ferrite...

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He said class C, I rarely mess with anymore:wink:

Just curious if anyone has any experience with building a home brew 1.1 balun for a quad that can handle higher power, say 10KW. I know you can buy them and I have built smaller ones for various antennas. I would rather build this one as well. I am planning on building a 4 element quad for 10/11...

It was not requested:tongue:

Yes, 3 transistors, 1 per stage to track heat. Very stable at the drive levels I have tested it at. Drift? I see no drift except for when the heatsink is warming up.

That is just the bias circuit in the picture, it is 6x2SC2879 amplifier. Yes I am familiar with 6 meter amplifiers, never did anything that did that much power though.