Thanks for the great feedback. All the discrete parts are of the highest quality i can source from well respected known suppliers only. For example Vishay, Panasonic and Multicomp for caps. I use metal film resistors only and also use turned pin sockets only for the best connections to the chips. All supplied chips including the processors, pia's, dac, sound and speech generators ics are NOS not used pulls and of course the board design and layout is my own

Here's are few more pics of the next lot of board assembly nearing completion and getting ready for new homes

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For those who have asked what my next major project would be, Please see here - https://pinside.com/pinball/forum/topic/mypinballs-sounds-plus-sound-board-in-development#post-2427090

Sounds Plus sound board featuring all the enhancements from this project and compatible with all digital sound games AS2518-51/56 and my upcoming effects processing daughter card

Quick Update: After what seems like an eternity of looking through different manufacturers data sheets i have finally located the little double plastic ended standoff used on all early bally games. I will be adding this as an option for future boards so you can make sure your new board will be nice and safe in its new home, with no danger of coming away from its mounting position.

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Yes, You can order on my website here - http://mypinballs.co.uk/electronics/store.jsp, or contact me directly

Quick Update: Assembly of pre-orders continues and a lot of boards have already shipped. Feedback so far has been great. Glad everyone is liking the quality of the product and the quality of the sound/speech

Also, as a recap, the summary of updates for my board over an original are:

- Reduced component count
- Test point pads for common signals and voltages
- Leds for power voltages and diagnostic led
- Improved and simplified reset section
- On board reset button
- Dip switch config for rom settings
- Fully compatible with all stock roms
- Dip switch config for inclusion of sound generator ic
- Expanded J2 connector to allow future plug on daughter cards such as echo/reverb board.
- Option via J2 for external amp hook up and multiple speaker usage
- Higher power amp on board for stock speaker connection
- Socketed ICs - All turned pin sockets
- Plate through design
- HASL Lead Free PCB and assembly where possible

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I also hope to show some prototypes of my plug on daughter card effects board soon, which will be compatible with both my bally sound board remakes and work for any game.

Update: Got the first pass done on my first effects board. As a recap this board will plug onto the J2 connector of either my Squawk & Talk or my Digital sound board for bally games and add reverb/echo effects to all sounds/speech etc. Stay tuned for testing of this board etc I will be ordering some protos to assemble and test soon.

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Update: More pre-orders ready for shipping. Please check your email for the final invoices. Boards will be shipped asap after payment received

Update: The effects board is now with the manufacture and i should have the first run of them back in a few weeks.

The effects board is plug and play on my new s&t hardware boards, and will also be plug and play on the other sound boards that i am making such as the earlier bally digital sound (plus) board and my custom pinball controller board set. It can be made to work with the original s&t boards, but it is not plug and play and you really need a 'centaur' era original board.

The cost i am aiming for is £40 assembled & tested plus shipping to your destination

Board blanks for the new effect module have arrived:

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Holy Cow! I just assembled one of these and plugged onto my new s&t board. Wow! The effects and adjustment range are even better than i thought they would be!!

Here's a few more pics of assembly and install in my Elektra. Some test vids coming shortly. Price for assembled and tested boards are £40 plus postage. All built to order. Please contact me directly if you would like one. I will be adding a product option on to my web page shortly to.

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Some test vids of the effects module running. I set the levels for moderate 'echoes'. Really adds great depth to an already great sound system

The effects board is designed to be plug and play for all my sound boards including the earlier sound board for xenon, space invaders, silverball mania, gold ball etc and also my custom pinball controller cpu/sound board. You will notice the same 11 pin i/o connector on them all.

It can be made to work with original 'centaur spec' s&t boards, but this isn't plug and play as it requires some modifications

As requested, I burned a set of flash gordon sounds roms and installed in my elektra. Here is a short speech clip of Ming with evil echo

Thanks Chris, Whirlwind is coming along nicely, though i have to fit in development of it and Indy around my new board designs and hardware. Whirlwind thread here - https://pinside.com/pinball/forum/topic/whirlwind-software-rewrite-the-journey#post-2429472

Yeah its plug and play for all my boards. the hacking for using an original s&t board is mostly on the original not my effects board. The issue with the originals is only the centaur specific one had a jumper for allowing external sound processing afaik.

Sound Effects Boards being assembled ready for testing:

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Yes, i was so happy when i found them. Taken years to track the little $%%%% down!!

I sell them on ebay here -> http://www.ebay.co.uk/itm/301688062749?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1558.l2649

or you can buy from me direct to Drop me a pm and i can send you an invoice.

Sounds great in fireball 2. Please post the video here to

I can post more videos of different sound rom sets in my boards when i get time including the use of the effect module with these sets. I can't remember off the top of my head if any customers have put them in Medusa games yet. I know quite a few people have bought them for Fathoms.

Fathom Sound Roms running in one of my new boards

Ha Ha, I only make high quality stuff

Post #66 shows how the effects daughter board plugs on to the main board and the female connector plugs

Thanks Chris. Glad you like the new board and sound quality. Getting good comments back, spurs me on to make more new cool stuff Also hope you enjoyed listening to the podcast. Was a fun evening.