Q68 netwrok port hardware

The Thor, Aurora, Q40, Q60 & Q68 etc. are discussed here.
FrancoisLanciault
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Re: Q68 netwrok port hardware

Postby FrancoisLanciault » Sun Jun 28, 2020 4:49 am

Hi,

I was finally able to fix my network board. I received the correct BAT-43 diode, installed it, but as many of you guessed, it did not solve the problem.

Then I realized the network signal would go high whenever I would plug my interface card. As a matter of fact, peek(hex(18020)) would give 57 as soon as the interface is plugged even if no cable is attached.

Removing the interface, I applied 3.3 volts to the 3v3in pin of the interface and I could measure 2.4 volts at the QL net pin. (Should be 0V or close to it because of the diode). Turn out I had a very dirty flux trace between 3v3in and QL net pin that was conducting a bit to much. A good cleaning solved the problem.

I now have my four QLs networked together !

- Q68
- SCG + Aurora
- GC + SD-QL
- BareBone QL 512k + TKII rom (latest arrival) now used to play games that are not compatible with the above systems.

The Q68 is now replacing the Aurora QL as my main developments machine.

Thank you every one for making this possible.

François


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Peter
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Re: Q68 netwrok port hardware

Postby Peter » Sat Jul 04, 2020 5:28 pm

Hi François, glad to hear QLNET with the Q68 works for you now, thanks for the update!


Derek_Stewart
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Re: Q68 netwrok port hardware

Postby Derek_Stewart » Thu Jul 09, 2020 8:16 pm

Hi,

Has anyone tried the Q68 QLAN connection to a Spectrum with Interface 1?


Regards,

Derek
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Peter
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Re: Q68 netwrok port hardware

Postby Peter » Thu Jul 09, 2020 9:00 pm

Yes Detlef and others successfully did that at last years German QL meeting.


kmmann
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Re: Q68 netwrok port hardware

Postby kmmann » Mon Mar 28, 2022 3:49 pm

Derek_Stewart wrote:Hi,

I used Lumberg 3.5" Jack Connectors:
QLNET_Connector_Drawing.pdf
Lumberg_Jack connector.pdf
There needs to be a switch on the connector


Hi Derek

I see the lumberg jack connector you previously used are now not available. Can you suggest any alternatives?


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Dave
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Re: Q68 netwrok port hardware

Postby Dave » Mon Mar 28, 2022 7:49 pm

This is all about the terminating resistor at the end of the network chain. It needs to be connected if no socket is present and disconnect if a socket is plugged in. The easiest solution to this if you have the wrong connectors is to make a single 3.5mm jack with the right terminating resistor across it.


Derek_Stewart
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Re: Q68 netwrok port hardware

Postby Derek_Stewart » Mon Mar 28, 2022 9:29 pm

kmmann wrote:
Derek_Stewart wrote:Hi,

I used Lumberg 3.5" Jack Connectors:
QLNET_Connector_Drawing.pdf
Lumberg_Jack connector.pdf
There needs to be a switch on the connector


Hi Derek

I see the lumberg jack connector you previously used are now not available. Can you suggest any alternatives?

Hi,

I got some similiar on eBay, which I guess would imported from somewhere like Aliexpress.


Regards,

Derek

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