开云体育

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