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Allison, That summary is much appreciated. Looks like a reasonable to-do list, anything much more than that and we may as well rebuild from scratch. Thanks! Jerry, KE7ER

As a 6M radio I'd give it a, your not serious.. At a bare minimum with enough mods to meet the FCC -50dbc for spurs and trash. * band pass before power amp. * better output filter. *Then dump the

Jeffery, One last step to the last #57649.. Once the relays are rewired the code must change. *From this:* /** ?* Select the properly tx harmonic filters ?* The four harmonic filters use only three

OK this is radical by some belief. First give up on the idea of 20mhz and above too many tough fixes needed. Both fixes are not fun but make sense for believable accomplishment. NOTE:? it does nto

A little off-topic, but looking at disassembly is important for the big processors too if you want to squeeze out the best performance. In particular, vectorizing compilers can be pretty finicky

Jerry, Did you reduce the gain on the amp's driver and pre-driver stages when adding the MMIC stage? Yes.? I cranked them down to 11db range as the goal was about 60db total using 2n2222a and

How about one for the 3.5 :^) -- N5KBP

Mr. Kees, I am interested if you make this up as a consumer product like your AGC board. Please let me know when you get the kit and pricing figures out. Will you provide the ferrite cores? I can do

Allison, Did you reduce the gain on the amp's driver and pre-driver stages when adding the MMIC stage? The power amp stages are serpentined in there pretty tight, I can believe more gain at RV1 will

Kees K5BCQ: You and your teammates appear to be making progress on a uBitx RF spur and harmonic solution. Two questions: 1) Do you hope to have a solution by any defined deadline; and 2, will this

Hello Warren Allgyer, I want to thank you for all the effort you have put into the uBITX spur/harmonic problem definition and the excellent data presented. I realize your project is shelved ....but,

Jerry, The LT1252 is a decent part the best place to see it as a linear preamp? is Elecraft K2.?? The RD16 vs IRF510 is a religious argument.? While the RD16HHF1 is good part it had very little

Bob Heil.... Pppffff On Thu, 31 May 2018 at 23:03, KENT HUFFORD<khufford@...> wrote: #yiv2731229869 #yiv2731229869 -- _filtered #yiv2731229869 {panose-1:2 4 5 3 5 4 6 3 2 4;} _filtered

Huh. That funny. My uBITx works just fine on 6 meters. With the proper modifications of course. Sent: Wednesday, August 22, 2018 9:18 AM To: [email protected] Subject: Re: [BITX20] boosting the power

For the 17mhz spur from 28mhz ops its there we can argue how much but its there. Since there is no filtering at all not only will it be there but a better amp or fixes only make it worse. FYI the few

6M for ubitx is a no.?? The amp has no capability there due to drivers and predrivers.? 2n3904 is dead there. Also the only filtering for TX path is the 33mhz low pass fitler. The point was IRF510

No. In fact? you need to check the spectral purity of yours if you plan to operate above 17 MHZ. You may need extra filtering? -Dan, W2DLC

Is this rig even marketed to operate on the higher bands such as 6 Meters?

TImothy (TEF), Step back take a deep breath.? Unless you have worked? with the uBitx most of what you are saying is barking at the moon. Saying parts hard to get I'm sure some are somewhere..? For

Dennis Yancy, RD16HHF1 is the 10$ solution that fixes little.? If you managed to blow the IRF510s then RD16s will be just as easy only more expensive. FYI the "better" is more myth than reality.?