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Thank you for your many personal insults. Tom, wb6b

For Pete and repete: Known problems and this was as of mid June.? IF your not aware of this log in to the form web version and read. History is amazing and repeated, repeated, repeated, repeated,

We still have some clean up to do on the code for our JackAl board on the ?BITX, but here's a sneak peek. (Please keep this under your hat until we release it...it's not ready for prime time yet.)

Jack See messages from July 6. Principle mod seems to he replacing audio IC amplifier with a discrete version. Just learning myself as our club is about to order boards. Curt

On Sat, Sep 15, 2018 at 04:56 PM, Tom, wb6b wrote: That is a handy summation of the gains needed. If switching the pre-driver to a mosfet (or better bipolar transistors, if they provide the same gain

Tom, You keep missing that with 4 stages they have to provide the gain at 30mhz.? Its built with 3904s and they just can't do that. What the 40M bitx does is not relevant.? Why because it does it at

I measured the OIP3 of the uBITX Bi-amp stage I proto built and the Hayward version, both at *45MHz* using the 1dB gain drop method. uBITX:? +20.83dB OIP3 Hayward: +20dB OIP3 Haywards Paper measures

Iz oos, I was thinking whether a MMIC up to 10dbm and an RD06HHF as driver like in the 10w qrp-pa-2008 might make sense Whats that going to fix?? The transformers need to be reworked, the prior

I forgot to add that the original analogy was based on the BITX40 only using 3 stages to produce approximately the same power of the uBITX with 4 stages. With 4 stages there should be more gain to

Hi Allison, That is a handy summation of the gains needed. If switching the pre-driver to a mosfet (or better bipolar transistors, if they provide the same gain advantage) could provide enough

Warren, I understand it will fix getting a cleaner source and levels out of the IF. You still can drive the mixers harder than compression at which things get nasty with spurs and all. Hows that going

all future will be told *see wiki*.

That is not quite correct Iz. My plan is to replace the entire three transistor amplifier, taking the current input from C20 and delivering the MMIC output to C22. The MMIC I tested and published

Tom, The PA is not the issue.? I have three designs using the IRF510 to as high as 50mhz all wideband.? One even uses 8 of the in 4x4 push-pull for 225W at 6M.? with 6W in? 225 out is not what I'd

I was thinking whether a MMIC up to 10dbm and an RD06HHF as driver like in the 10w qrp-pa-2008 might make sense

MRM,? Roger that.? Pete has been doing it for a while and differing ways.? Experimenter he is. We talk/write from time to time. Multi-band is not terribly hard but requires attention and filtering

Yes, as a matter of fact I have looked at the schematic.

Tom,? Have you ever even looked at the schematic or the web site??? That called bi-directional.? ?Thats the general? ways its done. The Plessy is exactly the same only one is upside down for fewer

Hi Terry, I quickly tried the modifications to the sketch as I suggested earlier today, and they seem to work OK. I tested this on my own BitX40 and I could tune through the entire 80m band. Also the

Allison, I know that in general MMICs (Mav, Ina, Era, Gali whatever) are eager of drawing current. If I understand Warren, he wants to change the first one or two 2n3904 in the chain just to clean the