H8 Z5-4

[glenn.f...@gmail.com]

I’m planning on build out some boards, one of which is the H8 Z5-4 (H8-5 clone++).  I think other than Norberto the only other one I saw building this board was Scott?

 

I believe there are some special tolerance components that I should be aware of – has anyone done a BOM for this board?  There’s a placeholder for a link on Norberto’s site but it’s not live yet

https://koyado.com/heathkit/New-H8-Website/h8-z5-4-serial-console-cassette-io.html

 

Also it looks like there’s some calibration required?  Any hints, lessons learned?    Also a high resolution picture of a completed board is always useful.

 

Scott, Norberto, (others?): can you help?

 

Thx.

 

• Glenn
•  

[norberto.collado koyado.com]

The BOM is almost completed. I just need to add the jumpers. I will send you one tonight. On the calibration, I just need to take some pictures to complete. Sorry but being busy building out other boards . 😳

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Subject: [sebhc] H8 Z5-4

 

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[norberto.collado koyado.com]

Preliminary BOM attached. Feel free to update as needed and return to load into website.

 

Pictured attached is for Rev 1.0 and you have Rev 1.2 (add jumper across JP15).

 

I will work on the calibration procedure tomorrow.

 

Norberto

 

From: se...@googlegroups.com <se...@googlegroups.com> On Behalf Of glenn.f...@gmail.com
Sent: Thursday, February 2, 2023 6:14 PM
To: se...@googlegroups.com
Subject: [sebhc] H8 Z5-4

 

I’m planning on build out some boards, one of which is the H8 Z5-4 (H8-5 clone++).  I think other than Norberto the only other one I saw building this board was Scott?

--

[smb...@gmail.com]

Glenn, I build mine and I've been using it for its UARTs, both the 8251 and the 16550. However, I haven't even touched the cassette functionality yet -- just haven't had time. There was nothing in my opinion technically difficult than the build, other than it was a little more work than usual due to the necessary large number of discrete components, which always take me longer to place. Haven't had time to do the calibration procedure yet -- things have just been very busy lately (and I keep going off on tangents).

Scott

[norberto.collado koyado.com]

Glenn,

 

Attached is a preliminary calibration procedure for the H8-Z5-4 board. Feel free to update or report back areas to improve. As the jumpers and signals are the same as the Original Heathkit H8-5 board, you can still use the H8-5 manual to calibrate such board.

 

Thanks,

Norberto