I have a complete V11 rig running?Greg's code. Rock solid. Runs 24/7. If there is a sand pit I fell in it.? Debugging the display was the hardest- that's why I jump into the threads about that.?

What stage of building are you at Larry?

?

?

As for me…

?

I’m spending the day running some final tests on the 100W module.? I can see I need to use a different current measurement resistor on the board.? It’s a 3W 0.005 ohm SMD resistor and that will be a problem if the board flexes (cracks).? I think I’ll use a T0-220 resistor instead.? It doesn’t get warm, but I’m wary of the physical characteristics of the SMD resistor.? That modification is an easy one.? I also have a hole in the middle of the board that is too small to get at the screw that holds the temperature the bias compensation junction (a Darlington junction) to the heatsink near the two output transistors.? I also am using two 1N4148 diodes in the bias circuit where Oliver used a size I can barely see… so I think I’m gonna have him change those to regular through-hole diodes.? Otherwise the amp is working extremely well (and has been for about 8 months).? I’ll publish performance plots shortly.

?

?

?

Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ

?

Owner - Operator

Big Signal Ranch – K9ZC

Staunton, Illinois

?

Owner – Operator

Villa Grand Piton – J68HZ

Soufriere, St. Lucia W.I.

Rent it:

?

Moderator: North American QRO Group at Groups.IO.

Moderator: Amateur Radio Builders Group at Groups.IO.

?

email:? bill@...

?

?

From: Larry Acklin <acklin@...>
Sent: Saturday, December 21, 2024 4:54 PM
To: [email protected]
Cc: K9HZ <bill@...>
Subject: Re: [AmateurRadioBuilders] V12 first try

?

Hook the antenna right to the rf board as a sanity check. Then move back to the next connection, work towards?the antenna RF connection. I had a loose SMA cable and or chassis connection that gave me trouble in my early spin up stages.?

?

Larry

KB3CUF?

?

On Sat, Dec 21, 2024 at 5:37?PM jerry-KF6VB via <jerry=[email protected]> wrote:

Continuing...

I soldered JP2 on the LPF controller card, and fabricated a
daisy-chain
cable for the "BANDS" connectors - mainboard->BPF->LPF. Now the BIT
test
passes. Yay!

The screen displays a normal T41 page, and relays click satisfyingly
when
I change bands.

But there is no receive yet. Just noise from the video card.

- Jerry, KF6VB




On 2024-12-21 14:29, K9HZ wrote:

Here is a link to the spreadsheet with all of the I2C assignments in
the T41…



DR. WILLIAM J. SCHMIDT - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ
PJ2/K9HZ VP2EHZ

Owner - Operator

Big Signal Ranch – K9ZC

Staunton, Illinois

Owner – Operator

Villa Grand Piton – J68HZ

Soufriere, St. Lucia W.I.

Rent it: [1]

Moderator: North American QRO Group at Groups.IO.

Moderator: Amateur Radio Builders Group at Groups.IO.

email: bill@...

FROM: [email protected] <[email protected]>
ON BEHALF OF jerry-KF6VB
SENT: Saturday, December 21, 2024 3:59 PM
TO: [email protected]
SUBJECT: [AmateurRadioBuilders] V12 first try

OK,

I got all the boards in place. Order left to right: RF - Main - BPF
- LPF - LPFControl.

Haven't fabricated quite all the cables yet. The LPF control board
really needs
straight SMA connectors, and I just ordered a bunch of right-angle
ones.
Straight ones are on order to arrive tomorrow.

In the meantime, I powered it up. No smoke came out. The display
displays normally. The BIT test complains that the BPF was not found,
and also the
I/O expander on the LPF.

The BPF - that's simple - no ribbon cable there yet. Does it daisy
chain mainboard - BPF - LPF? The missing expander on the LPF - I
believe I need to solder one or more jumpers on the LPF controller
card.
I'm guessing just JP2, yielding 101 or "5".

- Jerry, KF6VB



Links:
------
[1]
[2] /g/AmateurRadioBuilders/message/5618
[3] /mt/110236199/243852
[4] /g/AmateurRadioBuilders/post
[5] /g/AmateurRadioBuilders/editsub/243852
[6]
/g/AmateurRadioBuilders/leave/11522011/243852/920863695/xyzzy