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Hi Richard, Really sorry, my mistake, I have measured C10 again to the ground and this is also ~823 ohm. But don't bother with C10, nor C30. This is the same as measuring resistance from base of Q10

Wojtek, the scope photos were very helpful. That transformer is supposed to Step UP the voltage, not down.? ?So something is terribly wrong, and it appears tht bothof your FETs are doing fine. You

This is from Farhan re upgrading my V2, "The standing current in the diodes that switch the LPFs was found insufficient on 3.5 MHz, hence, the resistors R201, R202, R203 and R204 are changed from 470

Joel, FYI, changing the resistors increased the bias current on the PIN diodes for the LPF and T/R switching diodes.? This was to reduce spurs and improve power output, 73 Evan AC9TU

One of the things to change is R201-R204 to 330ohm 1/4 resistors, I remember doing mine but I don't remember why, other than that I don't recall doing anything else. Joel N6ALT

Before I stat removing components, I'll report the following based on your last suggestions: Resistance from base of Q30 to GND = 50.8 ohms, no where close to 836 ohms. Resistance from base of Q10

pt., 28 lut 2025 o 20:38 Evan Hand via groups.io <elhandjr= [email protected]> napisa?(a): As shown in the scope images, the DC of the drain voltages remain at ca 12V. It was the DC multimeter

JJ, I do not have the documentation; I have only the GitHub files with the original V2 schematic. The zip file is attached. 73 Evan AC9TU

Wojtek, Is your power supply voltage dropping?? Strangely, the drain voltages drop when you key the mic.? This could suggest that T7 has an issue.? Confirm that you are seeing the drain voltage

Do you have 1V here when you transmit?

I have checked signals with the scope (measured with 1:10 probe with DC coupling, 500 mv/div so 5V/div considering probe). Ground level: DC level on drains of finals without RF: Voltage with RF on

Thanks David. Although this doesn't address the necessary upgrades to keep the IRFZ24Ns in place; it does help to convert a V2 to a V3. > > >

Hello Evan, I have verified that bias circuitry works properly. I have even checked that the finals have full power suply voltage on their drains (13.3V) and that its DC value drops to ca 1V when I

Fred, There is a different answer for each individual.? Do you want to operate CW regularly?? Do you use headphones regularly?? ?Do you want to gain skills in hardware, software, or both?? These

Excellent update. It is great to see the work being accomplished. I will? be ordering after the rush dies down.

Humans are truly the biggest risk and it is enough to stumble once. -- Gyula HA3HZ

As far as I remember, several people tried several solutions that were discussed in the forum. Personally, I implemented a different version, a more complicated solution. This involves more work and

Thank you all for the comments. I will dig into some of the recommended mods for the v3 and see what I can do! -Fred KC3HMS [email protected]> wrote:

Believe me, I'm covered.? I deal with cybersecurity every day but these emails can, and probably will, snag someone else with fewer security checks.? Another aspect to consider is the groups.io

Thanks Evan! If the best option is to upgrade, it might be best to just get the newer kit from AmteurRadioKits. What am I missing tho in that they use a v5 for that as opposed to the v6? Is it