Merv, Yes, I could use the BAND0-3 lines from the ACC connector on the K3 to control band changing (filters). Not that hard to do if the relays are rated for the 300w power level.
I think I can sidestep the FCC regs by providing an "assembly service" of the established kits from CCI. Or I could just bundle it all as a kit, of course. I am not considering a complete ground-up design of my own, more of an enhancement of the CCI kit. This is all very premature thinking as I am building the kit for my personal use and it was an afterthought that others might be interested in the amp as a low-cost step above 10w but not all the way to 500w. I am not thinking of a major production of these - more a small niche business by which I might self-fund my hobby. Definitely, a zero-inventory approach where I would build on-demand. The KPA-100 and KPXA-100 may be too attractive for there even to be a market. But no harm there as I will not be making a major investment. I had originally been thinking of building a HF/6m 8877 amp but this would require 60w to drive. I have a 2m-8877 so the HV and grid-bias ckts are already done and could be switched between 2m and HF. But I really do not need QRO for HF; 200-300w will be enough. The final thing that killed the 8877 project is I have acquired a Harris Platinum 1100w 6m sspa so there is no motivation for making a 6m-8877. Let me end this by saying this is all speculative. I need to build my personal EB-27 CCI amp kit and see how it works out, first. It might be a prototype and then it might be one of a kind! I hope to find time to build the kit before fall. Right now I am loaded with other projects that probably will extend into July. 73, Ed - KL7UW ------------------------------ Message: 11 Date: Sat, 21 May 2011 07:08:29 -1000 From: Merv Schweigert <[email protected]> Subject: Re: [Elecraft] KX3 - New 100 watt amp To: [email protected] Message-ID: <[email protected]> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Seems it would not be difficult to make a auto band switching amp from that, relays for each band to swtich the LP filters driven by the K3 band outputs, at that power level relays are cheap, like the ones used in the AD5X ALS-600 QSK conversion. cheap and handle the power easily. Make up a circuit board and an enclosure for the amp, really nice set up. Another nice thing is that you can drive it with almost no power, not being limited by FCC regs (unless you sell them built) you can even drive something like a 4 MRF-150 amp with less than 10 watts to 600 output. 73 Merv 73, Ed - KL7UW, WD2XSH/45 ====================================== BP40IQ 500 KHz - 10-GHz www.kl7uw.com EME: 50-1.1kw?, 144-1.4kw, 432-100w, 1296-testing*, 3400-? DUBUS Magazine USA Rep [email protected] ====================================== ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
