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Forum 141

Workshop G6 Single Standard Decoder Board Loan

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Jayceebee
(@jayceebee)
Posts: 2027
Prominent Member Registered
Topic starter
 

The reason I ask is now I'm retired I'm not only repairing sets in my collection, you might also recall I've been developing and improving my Kicad skills. I've already produced a PSU board for the Rank A823, and a combined PCA440 module for replacing the two Thorn 4000 field thick film modules. I have also almost finished a better vertical deflection board than the one I etched for the 4000 and a replacement for a damaged 3000 PSU. If that was not enough, you may recall a couple of years ago I was helping Chris with his basket case G6. Although we never got as far as debugging the crispy decoder and as the workshop is still not a very inviting place at the moment with the temperatures we have been having I recently started designing a replacement G6 SS decoder board in Kicad.

This I've come to find is very challenging and basically I've now hit the buffers, the main problems are that there seems to be discrepancies with the board layouts and the circuit diagram in the manual. I need access to a real decoder for reference and also to get precise measurements for the cans, delay line and other unique G6 component footprints.

If anyone does have a spare on the shelf could I borrow it? Of course all postage costs would be covered. The board will be returned to you when I have finished and if I am successful with the redesign along with a brand spanking blank board when I get them manufactured.

Thanks in advance.

John.

 
Posted : 13/01/2023 6:54 pm
crustytv
(@crustytv)
Posts: 11903
Vrat Founder Admin
 

As boards become unserviceable or are to be found missing from TV's, with replacements hard to source, this is a valuable service you're offering to the VRAT community. You are to be commended for your efforts, as this is no walk in the park type exercise. 👍 

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Posted : 14/01/2023 9:52 am
Jayceebee reacted
Jamie
(@jskinner97)
Posts: 1755
Prominent Member Registered
 

Do not be afraid to make money from your services for the sheer amount of work and hours spent figuring this out. I have learnt this the hard way. 

 
Posted : 14/01/2023 10:39 am
Jayceebee
(@jayceebee)
Posts: 2027
Prominent Member Registered
Topic starter
 

@jskinner97 Thanks Jamie, I would be uncomfortable charging for this as I'm very much a total beginner/amateur at this, there is also probably a much more experienced guy over on UKVRRR offering his services to their members free. There are some aspects particularly with respect to the G6 decoder print layout going on under valveholders I don't understand. It's not possible to get exact copies using Kicad so complex designs could have unforeseen issues. Coming from the servicing side it's not something that I ever needed to consider before, I will post some examples later in a different thread and maybe someone can explain.

John.

 
Posted : 14/01/2023 1:52 pm
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