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Gordon, The ground pins on the filter trays are connected to the ground plane on the board and there are 3 grounds and the coax shields which return to uBITX ground. I'll also send the ground plane

For some reason the PDFs were duplicated so I erased the thing and redid the note.....confusing enough ;o)? PRELIMINARY.............. The idea here is to use the existing uBITX components on a

?Hi Keyes --- I wasn't following so not sure if this is for OUTPUT or as a preselector for the PA stage. I don't know exactly how to read your PCB's but a few questions: 1. I don't see the ground

Pretty picture nothing else, looks slick and tiny.? A schematic might be useful. Allison

K4MRT, I sincerely doubt you getting 24W (70V-PP).? I can believe 7W. Into? a 50ohm load I'd expect to see maybe 35VPP. for around 6-7W. Most people put a scope probe across? the output and and

The non push pull bitx amp is class AB1 (around 50 ma bias) single ended. The power out is more a function of the drive available and they tended to be all over the map.? With 200-400mW of drive the

reliable?? :-p

Hi ab2ts, Old post, but how are you reading the PP off your scope?? If you just take the number readout from it, you may have an erroneous reading due to noise etc.? Always verify scope readings by

Allison,? I think you are saying my graphic is OK.? The graphic is for pre PA driver stages only. It's based on your post # 56854 The actual filter type in each case, could well vary, but the

No, this group is for ALL of the BitX. From the group description: "This group exists for constructors of the various BITX projects" There are people here that have built all of the different

I am doing cw on 40 meters at the moment, i get 12 watts out. i get about the same on cw on 20 meters. kevin rea lancaster, calif. k6rea

My .02 on testing everything in sight... Send me one of each and a pot load of money I'll write a report.? You can read the manual as the specs called out are accurate. That will save a lot on

Has anyone looked at the Yaesu FT-991 for spectral purity? :) On Sun, Aug 12, 2018 at 5:07 PM, Jim Reagan<jimreagans@...> wrote: Has anyone run tests on the popular Elecraft KX3 or the Xiegu

DS as per my reply to GY3rp you can get pre etched boards for he old Bitx frm Fred at Far Circuits . He also does the 75m? SSB board by Weber which is essentially a Bitx but using? CMOS analogue

Somebody's rag chewing on 7277; don't think it's a BitX person. I'm going to try "CQ BX" on FT-8. -- John - WA2FZW

IMHO AF should still leave that old design up as it has some interesting points,? including the idea of a dual band VFO with one tuning capacitor...(as well as an LSB/USB carrier injection osc which

Some of the confusion on this thread arises from the fact that the early poster may have been using a class A RF final on an normal analogue Bitx.? Getting more than 4 W out of these at 13.8V supply

Calling CQ on 7277. Nothing but noise so far! -- John - WA2FZW

Diz at Kits and Parts in the US has a lot of? Rf? semi stuff,? as well as magnetic cores he is famous for. Furturlec.com has thousands of crystal frequencies and can also supply 2n3866 if you ask

*A thought occurs on a 20/40 m Bitx analogue dual band if you want to keep going*. There are three parts that need switching.? RF in.? ?the clean up filters after the RF mixing and the final LPF.?