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Spice it ...I did (using QUCS) .... Nearly a direct short to ground off the high impedance point of the amp (before the change) ...and you still have a linear control of the following amp chain (just

Andy I just ordered a 3.2 screen. I’m excited. Can’t wait to get it. This radio has been a fun build so far despite any technical imperfections. Joe KD2NFC

Keep going back? as errors and adds may be part of life. Allison

Curt, Those would be good solutions if you can get 2sc2166s at acceptable price and quantity without incurring the problem of fakes.? Its part of why the K1 was discontinued. We cannot rely on

Jim, Replacing RV1 with a 10K is not good as it would put all the adjustment in the last 5 degrees of rotation. A 500 ohm may be better. But you begging 1 db of gain increase for what reason??

On Fri, Sep 21, 2018 at 09:19 AM, Jeff Omundson wrote: 1)Keep amplifier intos and outofs away from each other. This also applies to all RF systems.?? 2)Keep amplifier gain stages reasonable.? Add

Jeff great question on what's a good transmit path design.? since I have the K2 manual here -- predriver is a 2n5109, feeding a (;3 transformer on a FT37-43 driver is a 2SC2166 NPN feeding a 12:8

Just as a suggestion, before you start ANY mods ...Consider replacing RV1 with a 10k or so pot .... All the preamp gain is getting eaten up by C82/100 ohm RV1 to ground .,, Sometimes the simplest

We haven't noticed those problems, but we're going through our board for that. Al and I are taking the JackAl to an off-the-grid site in TN for three days next week and I'll be able to give the CW

Those issues were solved a week after version 1 was released! rOn

I wonder if the JackAl will overcome the CW issues?? I have agc and 'thump' mods in place which help.? I still have issues with a delay on transmit, losing about half of the first letter sent and

For me at least, this is more conceptual, but I am interested in understanding more after reading about the issues? with the uBitx power amp driver and predriver problems.? What are the best

Acknowledged, I'll have a look to the wiki then.

Thanks for putting this info on the wiki and for adding the descriptive pictures!? It is very clear! -Jeff

BFO is off!

My bad...did not know that. Truly sorry... Jack, W8TEE

Yeah, it’s that extra 5% when you’re blind though. …

I felt exactly the same way when Al suggested using TS instead of a menu system. Now, I like it. Keep in mind you rarely actually "use" the TS system, with probably 95% of the time you're only using

Hi Dave, yes I am excited about the touch screen.- Its called a NEXTION Dr. Ian has several websites on how to wire up, Here is where I bought on ebay.? I paid a little more because I wanted it

Sounds great, except, and understanding I’m in a minority of 1 here, the touch screen. I’d love this tied to a menu if needed plus a 4X4 keypad or such. …